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Landing & Drill String
CATALOG
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With international advanced technology, sophisticated equipment and excellent management, Enerserva
manufacturing facility of landing string and drill string provides high quality drilling tools and satisfactory
services, including a comprehensive range of Landing string, Drill Pipe, Drill Collar, Heavy Weight Drill Pipe,
Kelly as well as sour service and non-magnetic drilling tools. Moreover, we also have researched and
developed DS, DSHT UT series double shoulder connections with self-owned intellectual property rights and
have been taking the leading position in producing PAC, AOH, H90 and other compatible premium threads.
The products are widely accepted and operated in North America, Central and South America, Middle East,
South East Asia, Russia and Central Asia, etc.
Our facility has complete quality management system with ISO 9001, NS-1, API and HSE certified. Being
equipped with a first-class material testing lab, we ensure each piece of our products meet or exceed the
requirements for durability and performance.
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Production Lines
Upsetter for Pipe Body
Japan Made Full Automatic Mechanical Upsetter 2-3/8” to 7”
One heating and two pressing
Uniform Transitional Zone, Fine grain size, and smooth inside & outside surface, MIU Long and smooth
Pipe Body Heat Treatment Furnace
• Itoh Industry Co., Japan
• 2-3/8” through 7”
• Quenching /Tempering Furnace : 5Ton/hr,
• Quenching Maximum Temperature: 950 degree;
Tempering: 750 degree
(Controlled within -/+ 5degree)
• Internal Quenching System;
Water Capacity max: 285ton/hr
• Impact Value: Minimum 100J
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Forging and Heat Treatment for Tool Joint
Fine Die Forging Machine Continuance Walking Beam Heat Treatment
Supermatic temperature control and QT time. High Impact Value:
Horizontal (90J) and Longitudinal (100J)
High anti-fatigue ability
Stable performance of each batch. No decarburation & carburizing, and little deformation.
Properties Comparison
Threading for Tool Joint.
MORI SEIKI - Japan made Supermatic High processing precision Lathe
The unique Lathe with DCG (Direct Current Generator) in the world minimize the vibration
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Uniform thread performance data
Friction Welding, DP / HWDP Assembly
Izumi Industry Co., Japan made Continuous Pusher Friction Welder
2-3/8” through 7-5/8” / Automatic data recorded
Coaxial shaft of welding: Maximum 1.0mm
Heat Treatment on Welding
Neturen Japan made
Automatic control on temperature and time of heating, soaking and cooling.
Heat affect area well controlled with limited coil width. Even
properties and stable metal structure.
Weld Zone Picture
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Heat Treatment for Bars
Japan made Gas Heating & Walking Beam Continuous HT Furnace. Size: 2-3/8” through
11” In China, only our facility is equipped with such furnace.
Heat overall length by natural gas, automatically temperature controlled ±5 Deg., soaking time controlled.
Various properties after HT far exceed Mid-Freq. facilities.
Boring for Bars
Lathe length: 30 meters. Sizes available: 2 3/8” to 14”
Boring starting from both ends, central meet-up step controlled within 1.6 mm.
Bore after heat treatment process avoids inner surface cracks
Concentricity of the full-length bore and straightness of the bar is well controlled to extend DC’s lifetime.
Profile and Threading
Lathe length: 30 meters. Sizes available: 2 3/8” to 14”
Spiral, Slip and Elevator, Stress relief features
Kellies, cold rolling on thread roots, cold working on slip & elevator recess.
High Lights:
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Heat Treatment
Gas Heating & Walking Beam Continuous HT Furnace--
High hardenability, Stable performance, Material uniformity.
Boring
Bore from two ends--
Good axiality, no tolerance on thread
Surface of the thread
Hot phosphorization—
Even and thickness are well controlled, Solder ability, Anti-Galling
Quality Control
Thread Gauges (Stored in warehouse with Constant Temperature and Humidity)
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XHB-3000 Digital Brinell Hardness Tester
(Range of measuring: 8-650HBW)
LC-200R Full-Automatic Rockwell Hardness Tester
Accuracy up to 0.01HRC.
ZBC2452 Computerized Automatic Metal Hammer Impact
Value Tester
The lowest test temperature: -60℃
600DX Hydraulic Pressure Servo Tester
Dual test space designed for tensile and bending test.
Carl Zeiss Axis Image.A1 Microscope (Germany)
Times of Enlargement: 25-1500X
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Shimadzu Direct-Reading Spectrometer PDA-
5500S Analyze the chemical composition efficiently
and accurately.
CONTENTS - SECTION II I. LANDING STRING ................................................................ 3.11-3.12
II. DRILL PIPE .......................................................................... 3.13-3.24
2.1 STANDARD DRILL PIPE
...................................................................................................................................................... 3.13-3.18
2.2 SOUR SERVICE DRILL PIPE
..................................................................................................................................................... 3.19-
2.3 DIGITAL DRILL PIPE
...................................................................................................................................................................
3.20
2.4 EFFICIENT CUTTING BED CLEAN DRILL PIPE
........................................................................................................................ 3.21
2.5 ALUMINIUM ALLOY DRILL PIPE
......................................................................................................................................... 3.21-3.22
2.6 TRENCHLESS / HDD DRILL PIPE
.............................................................................................................................................. 3.22
III. HEAVY WEIGHT DRILL PIPE .................................................. 3.25
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IV. DRILL COLLAR ................................................................... 3.26-3.29
4.1 DRILL COLLAR (SLICK & SPIRAL)
..................................................................................................................................... 3.26-3.28
4.2 NON-MAGNETIC DRILL COLLAR
............................................................................................................................................... 3.29
V. REAMER ....................................................................................
3.30
VI. STABILIZER .............................................................................
3.31-3.42
6.1 INTEGRAL BLADE STABILIZER
......................................................................................................................................... 3.31-3.36
6.2 REPLACEABLE SLEVE STABILIZER
......................................................................................................................................... 3.37
6.3 NON-ROTATING STABILIZER
.................................................................................................................................................... 3.38
6.4 FLOAT VALVE STABILIZER
........................................................................................................................................................ 3.39
6.5 SPHERICAL STABILIZER
............................................................................................................................................................ 3.40
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VII. KELLY (SQUARE AND HEXAGONAL) ....................................
3.43
VIII. HOLE OPENER ........................................................................
3.44
IX. DRILL STRING ACCESSORIES ..............................................
3.45-
9.1 LIFTING SUB
........................................................................................................................................................................
........ 3.45
9.2 CROSSOVER
.......................................................................................................................................................................
3.46-3.47
9.3 LIFTING PLUG & CAP
.................................................................................................................................................................
3.47
9.4 KELLY / TOP DRIVE SAVER SUBS
............................................................................................................................................ 3.48
9.5 ORIENTED BENT SUB
................................................................................................................................................................ 3.48
9.6 DRILL BIT SUB
........................................................................................................................................................................
.... 3.49
9.7 WEAR
SUB.................................................................................................................................................................
.................. 3.49
9.8 FLOAT VALVE SUB
.....................................................................................................................................................................
3.50
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I. LANDING STRING A Landing String is a heavy duty thick wall drill pipe, usually 0.500" wall or greater. It is used in many instances
where regular drill pipe does not have sufficient tensile strength. A landing string can be used not only for
drilling, but also to land heavy casing strings in the well or heavy equipment on the sea bed. A slip crushing
resistant landing string is designed to resist to a phenomenon called slip crushing when gripped by the slips
on the rotary table. Manufactured from the same grade of steel, the tensile rating directly correlates to the wall
thickness.
Landing String sizes include 5", 5-1/2", 5-7/8, 6-5/8", & 6-5/8" Slip Proof. Grades S-135, Z-140, & V-150.
Our landing Strings offer a variety of drill pipe-based designs for non-slip crushing resistant landing strings:
typically those landing strings exhibit large OD (up to 6-5/8"), proprietary high strength steel grades, and heavy
wall sections (up to 0.938" wall).
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Special Features:
• Higher running speed. • Higher tensile and hoisting capacity. • Increased elevator loading capacity. • Better slip
crushing resistance.
OD
Connection
Grade
Range
Wall
Nominal
Weight
TJ OD
TJ ID
Tube ID
TJ Yield
Min MUT
Max
MUT
Prem Tube
Tensile (in) (in) (lb/ft) (in) (in) (ft-lbs) (ft-lbs) (ft-lbs) (lbs)
5 NC50 S-135 II 0.5 25.6 6-5/8 2-3/4 4 63,400 31,700 38,000 746,442
5 NC50 V-150 II 0.5 25.6 6-5/8 2-3/4 4 63,400 31,700 38,000 829,380
5-1/2 HT55 S-135 II 0.75 38.05 7-1/8 3-1/4 4 107,100 53,500 64,200 1,170,556
5-1/2 5-1/2" FH S-135 II 0.75 38.05 7-1/8 3-1/4 4 70,700 35,400 42,400 1,170,556
5-1/2 5-1/2" FH S-135 II 0.75 38.05 7-1/4 3-1/4 4 78,700 39,400 47,200 1,170,556
6-5/8 6-5/8" FH S-135 II 0.625 40.05 8-1/2 4-1/4 5.375 108,353 54,200 65,000 1,245,837
6-5/8 6-5/8" FH S-135 III 0.625 40.05 8-1/2 4-1/4 5.375 108,353 54,200 65,000 1,245,837
6-5/8 6-5/8" FH V-150 III 0.625 40.05 8-1/2 4-1/4 5.375 108,353 54,200 65,000 1,384,263
6-5/8 6-5/8" FH S-135 II 0.750 47.06 8-1/2 4-1/4 5.125 108,353 54,200 65,000 1,456,834
6-5/8 6-5/8" FH S-135 II 0.813 50.46 8-1/2 3-1/2 4.999 130,200 65,100 71,000 1,558,354
6-5/8 6-5/8" FH V-150 II 0.813 50.46 8-1/2 3-1/2 4.999 130,200 65,100 71,000 1,731,504
6-5/8 DS65 V-150 II 0.813 50.46 8-1/2 4 4.999 146,000 82,600 87,600 1,731,504
6-5/8 6-5/8" FH V-150 III 0.938 56.95 8-11/16 3-1/2 4.749 138,500 69,500 78,000 1,944,683
6-5/8
6-5/8" FH
V-150
II 0.938-
1.703
56.95
8-11/16
3-1/2
4.749
138,500
69,500
78,000
1,944,683
6-5/8
6-5/8" FH
V-150
III 1.093-
1.719
64.58
8-11/16
3-1/2
4.44
155,741
69,500
78,000
2,189,804
II. DRILL PIPE Drill pipe is the top component of any drill string that makes up the majority of a drill string's length. Its functions
are to transmit torque and power from the top drive or rotary table to the bit. A drill pipe is described by its size,
weight, grade, connection, upset, range and class.
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We manufacture and supply a full range of friction welded drill pipes in nominal sizes from 2-3/8" to 6-5/8" and
a wide range of wall thickness. On our drill pipes, we adopts a strict quality control policy to ensure total quality
control from initial material qualification, in-process inspection to final out-going quality inspection. We are
confident that our each joint of drill pipes meets your needs for
reliability, durability and performance during your drilling
operations.
2.1 Standard Drill Pipe
Tool Joint Parameters
TJ
Designation
Conn.
Nominal
Weight
Grade
Pin / Box
OD
Pin ID
Bevel Dia., Pin /
Box Shoulder
Total Length,
Tool Joint Pin
Pin Tong
Space
Box Tong
Space
Combined
Length, Pin/Box
Box Dia. At
Elevator Upset
Pin Dia. At
Elevator Upset
D d DF LP LPB LB L DPE DTE
lb/ft in in in in in in in in in
NC26
2-3/8IF
2-3/8EU
6.65
E 3-3/8 1-3/4 3-17/64 10 7 8 15 2-9/16 2-9/16
X 3-3/8 1-3/4 3-17/64 10 7 8 15 2-9/16 2-9/16
G 3-3/8 1-3/4 3-17/64 10 7 8 15 2-9/16 2-9/16
NC31
2-7/8IF
2-7/8EU
10.4
E 4-1/8 2-1/8 3-61/64 10-1/2 7 9 16 3-3/16 3-3/16
X 4-1/8 2 3-61/64 10-1/2 7 9 16 3-3/16 3-3/1
G 4-1/8 2 3-61/64 10-1/2 7 9 16 3-3/16 3-3/16
S 4-3/8 1-5/8 3-61/64 10-1/2 7 9 16 3-3/16 3-3/16
NC38
3-1/2IF
3-1/2EU
9.5 E 4-3/4 2-11/16
4-37/64 11-1/2 8 10-1/2 18-1/2 3-7/8 3-7/8
13.3
E 4-3/4 2-11/16
4-37/64 12 8 10-1/2 18-1/2 3-7/8 3-7/8
X 5 2-9/16 4-37/64 12 8 10-1/2 18-1/2 3-7/8 3-7/8
G 5 2-7/16 4-37/64 12 8 10-1/2 18-1/2 3-7/8 3-7/8
S 5 2-1/8 4-37/64 12 8 10-1/2 18-1/2 3-7/8 3-7/8
15.5
E 5 2-9/16 4-37/64 12 8 10-1/2 18-1/2 3-7/8 3-7/8
X 5 2-7/16 4-37/64 12 8 10-1/2 18-1/2 3-7/8 3-7/8
G 5 2-1/8 4-37/64 12 8 10-1/2 18-1/2 3-7/8 3-7/8
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TJ
Designation
Conn.
Nominal
Weight
Grade
Pin / Box
OD
Pin ID
Bevel Dia., Pin /
Box Shoulder
Total Length,
Tool Joint Pin
Pin Tong
Space
Box Tong
Space
Combined
Length, Pin/Box
Box Dia. At
Elevator Upset
Pin Dia. At
Elevator Upset
D d DF LP LPB LB L DPE DTE
lb/ft in in in in in in in in in
NC40
4FH
3-1/2EU
15.5 S 5-1/2 2-1/4 5-1/64 11-1/2 7 10 17 3-7/8 3-7/8
4IU
14
E 5-1/4 2-13/16
5-1/64 11-1/2 7 10 17 4-3/16 4-3/16
X 5-1/4 2-11/16
5-1/64 11-1/2 7 10 17 4-3/16 4-3/16
G 5-1/2 2-7/16 5-1/64 11-1/2 7 10 17 4-3/16 4-3/16
S 5-1/2 2 5-1/64 11-1/2 7 10 17 4-3/16 4-3/16
NC46
4IF
4EU
14
E 6 3-1/4 5-23/32 11-1/2 7 10 17 4-1/2 4-3/16
X 6 3-1/4 5-23/32 11-1/2 7 10 17 4-1/2 4-3/16
G 6 3-1/4 5-23/32 11-1/2 7 10 17 4-1/2 4-3/16
S 6 3 5-23/32 11-1/2 7 10 17 4-1/2 4-3/16
4-1/2IU 13.75 E 6 3-3/8 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
4-1/2EU
16.6
E 6-1/4 3-1/4 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
X 6-1/4 3 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
G 6-1/4 3 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
S 6-1/4 2-3/4 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
4-1/2IE
U
20
E 6-1/4 3 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
X 6-1/4 2-3/4 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
G 6-1/4 2-1/2 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
S 6-1/4 2-1/4 5-23/32 11-1/2 7 10 17 4-11/16 4-11/16
NC50
4-1/2IF
4-1/2EU
13.75
16.60
E 6-5/8 3-3/4 6-1/16 11-1/2 7 10 17 5 5
E 6-5/8 3-3/4 6-1/16 11-1/2 7 10 17 5 5
X 6-5/8 3-3/4 6-1/16 11-1/2 7 10 17 5 5
G 6-5/8 3-3/4 6-1/16 11-1/2 7 10 17 5 5
S 6-5/8 3-1/2 6-1/16 11-1/2 7 10 17 5 5
20
E 6-5/8 3-5/8 6-1/16 11-1/2 7 10 17 5 5
X 6-5/8 3-1/2 6-1/16 11-1/2 7 10 17 5 5
G 6-5/8 3-1/2 6-1/16 11-1/2 7 10 17 5 5
S 6-5/8 3 6-1/16 11-1/2 7 10 17 5 5
19.5
E 6-5/8 3-3/4 6-1/16 11-1/2 7 10 17 5-1/8 5-1/8
X 6-5/8 3-1/2 6-1/16 11-1/2 7 10 17 5-1/8 5-1/8
G 6-5/8 3-1/4 6-1/16 11-1/2 7 10 17 5-1/8 5-1/8
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NC50
5-1/2IF
5IEU
S 6-5/8 2-3/4 6-1/16 11-1/2 7 10 17 5-1/8 5-1/8
25.6
E 6-5/8 3-1/2 6-1/16 11-1/2 7 10 17 5-1/8 5-1/8
X 6-5/8 3 6-1/16 11-1/2 7 10 17 5-1/8 5-1/8
G 6-5/8 2-3/4 6-1/16 11-1/2 7 10 17 5-1/8 5-1/8
TJ
Designation
Conn.
Nominal
Weight
Grade
Pin / Box
OD
Pin ID
Bevel Dia., Pin /
Box Shoulder
Total Length,
Tool Joint Pin
Pin Tong
Space
Box Tong
Space
Combined
Length, Pin/Box
Box Dia. At
Elevator Upset
Pin Dia. At
Elevator Upset
D d DF LP LPB LB L DPE DTE
lb/ft in in in in in in in in in
5-1/2FH
5IEU
19.5
E 7 3-3/4 6-23/32 13 8 10 18 5-1/8 5-1/8
X 7 3-3/4 6-23/32 13 8 10 18 5-1/8 5-1/8
G 7 3-3/4 6-23/32 13 8 10 18 5-1/8 5-1/8
S 7-1/4 3-1/2 6-23/32 13 8 10 18 5-1/8 5-1/8
25.6
E 7 3-1/2 6-23/32 13 8 10 18 5-1/8 5-1/8
X 7 3-1/2 6-23/32 13 8 10 18 5-1/8 5-1/8
G 7-1/4 3-1/2 6-23/32 13 8 10 18 5-1/8 5-1/8
5-1/2FH 5IEU 25.6 S 7-1/4 3-1/4 6-23/32 13 8 10 18 5-1/8 5-1/8
21.9
E 7 4 6-23/32 13 8 10 18 5-11/16 5-11/16
X 7 3-3/4 6-23/32 13 8 10 18 5-11/16 5-11/16
G 7-1/4 3-1/2 6-23/32 13 8 10 18 5-11/16 5-11/16
S 7-1/4 3 6-23/32 13 8 10 18 5-11/16 5-11/16
24.7
E 7 4 6-23/32 13 8 10 18 5-11/16 5-11/16
X 7 3-1/2 6-23/32 13 8 10 18 5-11/16 5-11/16
G 7-1/4 3-1/2 6-23/32 13 8 10 18 5-11/16 5-11/16
S 7-1/2 3 6-23/32 13 8 10 18 5-11/16 5-11/16
6-5/8FH
6-5/8IEU
25.2
E 8 5 7-45/64 13 8 10 18 5-11/16 5-11/16
X 8 5 7-45/64 13 8 11 19 6-15/16 6-15/16
G 8-1/4 4-3/4 7-45/64 13 8 11 19 6-15/16 6-15/16
S 8-1/4 4-1/4 7-45/64 13 8 11 19 6-15/16 6-15/16
25.2
E 8 5 7-45/64 13 8 11 19 6-15/16 6-15/16
X 8-1/4 4-3/4 7-45/64 13 8 11 19 6-15/16 6-15/16
G 8-1/4 4-3/4 7-45/64 13 8 11 19 6-15/16 6-15/16
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S 8-1/2 4-1/4 7-45/64 13 8 11 19 6-15/16 6-15/16
Drill Pipe Main Technical Parameters
Drill Pipe SPECIFICATIONS
Designationsa
Pipe
body
OD
Pipe wall thickness
Drill Pipe
Weld
Neck
Tool Joint RSC
bevel dia.
Approx
OD
Pin ID
Pin OD Box OD
massc
Length Length
Label1 Label2 Grade Upset RSC Ddp t Dteb D dp Lpb Lb Df Wdp
Type typed mm mm mm mm mm mm mm mm kg/m
-12.5%
max. ±0.8
+0.4 ±6.4
±6.4
±0.4
Calculated -0.8
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Internal-External Upset (IEU) 4-1/2 16.6 E IEU NC46 114.3 8.56 119.1 158.8 82.6 177.8 254 145.26 27.36
4-1/2 16.6 X G IEU NC46 114.3 8.56 119.1 158.8 76.2 177.8 254 145.26 27.73
4-1/2 16.6 S IEU NC46 114.3 8.56 119.1 158.8 69.9 177.8 254 145.26 28.04
4-1/2 20 E IEU NC46 114.3 10.92 119.1 158.8 76.2 177.8 254 145.26 32.94
4-1/2 20 X IEU NC46 114.3 10.92 119.1 158.8 69.9 177.8 254 145.26 33.69
4-1/2 20 G IEU NC46 114.3 10.92 119.1 158.8 63.5 177.8 254 145.2 33.97
4-1/2 20 S IEU NC46 114.3 10.92 119.1 158.8 57.2 177.8 254 145.26 34.23
5 19.5 E IEU NC50 127 9.19 130.2 168.3 95.3 177.8 254 153.99 31.79
5 19.5 X IEU NC50 127 9.19 130.2 168.3 88.9 177.8 254 153.99 32.58
5 19.5 G IEU NC50 127 9.19 130.2 168.3 82.6 177.8 254 153.99 32.95
5 19.5 S IEU NC50 127 9.19 130.2 168.3 69.9 177.8 254 153.99 33.6
5 19.5 E IEU 5-1/2FH 127 9.19 130.2 177.8 95.3 203.2 254 170.66 33.22
5 19.5 X G IEU 5-1/2FH 127 9.19 130.2 177.8 95.3 203.2 254 170.66 33.61
5 19.5 S IEU 5-1/2FH 127 9.19 130.2 184.2 88.9 203.2 254 170.66 34.89
5 25.6 E IEU NC50 127 12.7 130.2 168.3 88.9 177.8 254 153.99 40.73
5 25.6 X IEU NC50 127 12.7 130.2 168.3 76.2 177.8 254 153.99 41.8
5 25.6 G IEU NC50 127 12.7 130.2 168.3 69.9 177.8 254 153.99 42.11
5 25.6 E IEU 5-1/2FH 127 12.7 130.2 177.8 88.9 203.2 254 170.66 42.14
5 25.6 X IEU 5-1/2FH 127 12.7 130.2 177.8 88.9 203.2 254 170.66 42.51
5 25.6 G IEU 5-1/2FH 127 12.7 130.2 184.2 88.9 203.2 254 170.66 43.35
5 25.6 S IEU 5-1/2FH 127 12.7 130.2 184.2 82.6 203.2 254 170.66 43.75
5-1/2 21.9 E IEU 5-1/2FH 139.7 9.17 144.5 177.8 101.6 203.2 254 170.66 35.43
5-1/2 21.9 X IEU 5-1/2FH 139.7 9.17 144.5 177.8 95.3 203.2 254 170.66 36.36
5-1/2 21.9 G IEU 5-1/2FH 139.7 9.17 144.5 184.2 88.9 203.2 254 170.66 37.61
5-1/2 21.9 S IEU 5-1/2FH 139.7 9.17 144.5 190.5 76.2 203.2 254 180.18 39.27
5-1/2 24.7 E IEU 5-1/2FH 139.7 10.54 144.5 177.8 101.6 203.2 254 170.66 39.19
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5-1/2 24.7 X G IEU 5-1/2FH 139.7 10.54 144.5 184.2 88.9 203.2 254 170.66 41.32
5-1/2 24.7 S IEU 5-1/2FH 139.7 10.54 144.5 190.5 76.2 203.2 254 180.18 42.97
(CONTINUED)
Drill Pipe SPECIFICATIONS
Designationsa
Pipe
body
OD
Pipe wall thickness
Drill Pipe
Weld
Neck
Tool Joint RSC
bevel dia.
Approx
OD
Pin ID
Pin OD Box OD massc
Length Length
Label1 Label2 Grade Upset RSC Ddp t Dteb D dp Lpb Lb Df Wdp
Type typed mm mm mm mm mm mm mm mm kg/m
-12.5%
max. ±0.8
+0.4 ±6.4
±6.4
±0.4
Calculated -0.8
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Internal-External Upset (IEU) 6-5/8 25.2 E IEU 6-5/8FH 168.28 8.38 176.2 203.2 127 203.2 279.4 195.66 41.03
6-5/8 25.2 X IEU 6-5/8FH 168.28 8.38 176.2 203.2 127 203.2 279.4 195.66 41.03
6-5/8 25.2 G IEU 6-5/8FH 168.28 8.38 176.2 209.6 120.7 203.2 279.4 195.66 42.6
6-5/8 25.2 S IEU 6-5/8FH 168.28 8.38 176.2 215.9 108 203.2 279.4 195.66 44.73
6-5/8 27.7 E IEU 6-5/8FH 168.28 9.19 176.2 203.2 127 203.2 279.4 195.66 43.79
6-5/8 27.7 X G IEU 6-5/8FH 168.28 9.19 176.2 209.6 120.7 203.2 279.4 195.66 45.35
6-5/8 27.7 S IEU 6-5/8FH 168.28 9.19 176.2 215.9 108 203.2 279.4 195.66 47.48
Drill Pip e SPECIFICATIONS
Designationsa
Pipe-body
OD
Pipe wall thickness
Drill Pipe
Weld
Neck
Tool Joint RSC
bevel dia.
Approx
OD
Pin ID
Pin OD Box OD
massc
Length Length
Label1 Label2 Grade Upset RSC Ddp t Dteb D dp Lpb Lb Df Wdp
Type typed mm mm mm mm mm mm mm mm kg/m
-12.5%
max. ±0.8
0.4 ±6.4
±6.4
±0.4
Calculated -0.8
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Internal Upset (IU)
4 14 E IU NC40 101.6 8.38 106.4 133.4 71.4 177.8 254 127.4 22.42
4 14 X IU NC40 101.6 8.38 106.4 133.4 68.3 177.8 254 127.4 22.76
4 14 G IU NC40 101.6 8.38 106.4 139.7 61.9 177.8 254 127.4 23.61
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4 14 S IU NC40 101.6 8.38 106.4 139.7 50.8 177.8 254 127.4 24.03
4-1/2 13.75 E IU NC46 114.3 6.88 119.1 152.4 85.7 177.8 254 145.26 22.5
Drill Pip e SPECIFICATIONS
Designationsa
Pipe-body
OD
Pipe wall thickness
Drill Pipe
Weld
Neck
Tool Joint RSC
bevel dia.
Approx
OD
Pin ID
Pin OD Box OD massc
Length Length
Label1 Label2 Grade Upset RSC Ddp t Dteb D dp Lpb Lb Df Wdp
Type typed mm mm mm mm mm mm mm mm kg/m
-12.5%
max. ±0.8
0.4 ±6.4
±6.4
±0.4
Calculated -0.8
1 2 3 4 5 6 7 8 9 10 11 12 13 14
External Upset (E U)
2-3/8 6.65 E EU NC26 60.32 7.11 65.1 85.7 44.5 177.8 203.2 82.95 10.45
2-3/8 6.65 X G EU NC26 60.32 7.11 65.1 85.7 44.5 177.8 203.2 82.95 10.58
2-7/8 10.4 E EU NC31 73.02 9.19 81 104.8 54 177.8 228.6 100.41 16.25
2-7/8 10.4 X G EU NC31 73.02 9.19 81 104.8 50.8 177.8 228.6 100.41 16.5
2-7/8 10.4 S EU NC31 73.02 9.19 81 111.1 41.3 177.8 228.6 100.41 17.19
3-1/2 9.5 E EU NC38 88.9 6.45 98.4 120.7 68.3 203.2 266.7 116.28 15.77
3-1/2 13.3 E EU NC38 88.9 9.35 98.4 120.7 68.3 203.2 266.7 116.28 20.77
3-1/2 13.3 X EU NC38 88.9 9.35 98.4 127 65.1 203.2 266.7 116.28 21.76
3-1/2 13.3 G EU NC38 88.9 9.35 98.4 127 61.9 203.2 266.7 116.28 21.9
3-1/2 13.3 S EU NC38 88.9 9.35 98.4 127 54 203.2 266.7 116.28 22.22
3-1/2 15.5 E EU NC38 88.9 11.4 98.4 127 65.1 203.2 266.7 116.28 24.67
3-1/2 15.5 X EU NC38 88.9 11.4 98.4 127 61.9 203.2 266.7 116.28 25.07
3-1/2 15.5 G EU NC38 88.9 11.4 98.4 127 54 203.2 266.7 116.28 25.38
3-1/2 15.5 S EU NC38 88.9 11.4 98.4 139.7 57.2 203.2 266.7 127.4 26.19
4 14 E EU NC46 101.6 8.38 114.3 152.4 82.6 177.8 254 145.26 23.67
4 14 X G EU NC46 101.6 8.38 114.3 152.4 82.6 177.8 254 145.26 24.12
4 14 S EU NC46 101.6 8.38 114.3 152.4 76.2 177.8 254 145.26 24.46
4-1/2 13.75 E EU NC50 114.3 6.88 127 168.3 95.3 177.8 254 153.99 23.65
4-1/2 16.6 E EU NC50 114.3 8.56 127 168.3 95.3 177.8 254 153.99 27.51
4-1/2 16.6 X G EU NC50 114.3 8.56 127 168.3 95.3 177.8 254 153.99 28.07
4-1/2 16.6 S EU NC50 114.3 8.56 127 168.3 88.9 177.8 254 153.99 28.47
4-1/2 20 E EU NC50 114.3 10.92 127 168.3 92.1 177.8 254 153.99 32.93
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4-1/2 20 X G EU NC50 114.3 10.92 127 168.3 88.9 177.8 254 153.99 33.63
4-1/2 20 S EU NC50 114.3 10.92 127 168.3 76.2 177.8 254 153.99 34.34
2.2 Sour Service Drill Pipe (H2S)
Standard: IRP1.8, NACE MR0175 / ISO 15156
Size Range: 2-3/8" ~ 6-5/8" Special Features:
• Strict control over the S and P content (S+P < 0.03%)
• Increase of the Cr, Mo content, unique heat treatment
process, grain refinement. (The grain size exceeds Grade 8 standards in ASTM Standard)
• Compound with double shoulder high torque connection (DS, DSHT)
• Strict control over the intensity, rigidity and other indexes.
Specification and Feature of Materials: Contents DP95SS DP105SS
Chemical composition wt% S≤0.005, P≤0.010 S≤0.005, P≤0.010
metallographic structure tempered martensite, ≥95% tempered martensite, ≥95%
Grain size ASTM E112 Grade 8 or finer ASTM E112 Grade 8 or finer
Yield strength 655/758MPa(95/110KSI) 724/827MPa(105/120KSI)
Tensile Strength 724/896MPa(105/130KSI) 793/965MPa(115/140KSI)
Elongation % ≥17 ≥17
Impact Energy (7.5*10*55, -20℃) (single)≥80J(59Ft-Lb) (single)≥80J(59Ft-Lb)
Hardness HRC Single18---27, average≤25 Single21---29, average≤28
sulfur tolerance
≥557MPa(80.8KSI), ≥85%SMYS
≥616MPa(89.2KSI),
≥85%SMYS
Chemical composition S≤0.005, P≤0.010 S≤0.005, P≤0.010
metallographic structure tempered martensite, ≥90% tempered martensite, ≥90%
Grain size Grade 7 or finer Grade 7 or finer
Yield strength 758/862MPa (110/125KSI) 758/862MPa (110/125KSI)
Tensile Strength 862/1000MPa(125/145KSI) 862/1000MPa(125/145KSI)
Elongation % ≥15 ≥15
Impact Energy (10*10*55, -20℃) Single≥90J(66Ft-Lb) Single≥90J(66Ft-Lb)
Hardness HRC Single≤32, Average≤30 Single≤32, Average≤30
Sulfur Tolerance
≥493MPa(71.5KSI) ≥493MPa(71.5KSI)
≥65%SMYS ≥65%SMYS
2.3 Digital Drill Pipe Technical Advantages
Realizing read-write for drill pipe's remote sense, reducing the
probability of human error, enhancing the accuracy of
management. Realizing fast efficient storage and recognition
technique for drill pipe's manufacturing, using, maintaining
information with the cooperation of drill pipe digital management
platform.
All the operation and maintenance date of each drill pipe can be
preserved in time to master the use of drill pipe real-time and
dynamically for easy classification management of drill pipe. So the life-cycle of drill pipe from purchase, use,
maintenance, scrapping and disposition of drill pipe can be wholly controlled within a perfect digital
management.
Technical Parameter
Chip of Digi tal Drill Pipe
Operating Temperature -40℃ ~ 200℃
Pressure Resistance 70MPa
Vibration Frequency Resistance 5Hz ~ 10Hz
PH 3 ~ 14
Anti-electromagnetic interference 120000A/m
Recognition Range 0~1m
Chip Recognition Speed ≤0.5s
Chip Recognition Rate ≥95%
Drill Pipe Recognition Rate ≥98%
2.4 Efficient Cuttings Bed Clean Drill Pipe Efficient cuttings bed clean drill pipe is designed to improve hole-cleaning performance in horizontal or
complex non-conventional wells.
Special Features:
• Cleaning efficiency improvement • Cut down on well bore damage • Reduce downhole failure risk
2.5 Aluminium Alloy Drill Pipe We adopt the world's leading proprietary manufacturing technology for high-strength environmental friendly
aluminium alloy drill pipe used in oil & gas industry. We utilize two-way reverse hydraulic extruding machines
from Germany, the largest vertical compound hardening furnace in Asia and proprietary shrinkage fitting
equipment.
2.5.1 External Upset Aluminium Alloy Drill Pipe
2.5.2 Internal Upset Aluminium Alloy Drill Pipe
2.5.3 Integral Tool Joint Aluminium Alloy Drill Pipe
2.5.4 Non-Magnetic Heavy Weight Aluminium Alloy Drill Pipe
2.5.5 Spiral Thick-walled Aluminium Alloy Drill Pipe
2.5.6 Thick-walled Aluminium Alloy Drill Pipe
2.6 Trenchless / Horizontal Directional Drilling (HDD) Drill Pipe We adopt the world's leading proprietary manufacturing technology for high-strength environmental friendly drill
pipe used in Trenchless / Horizontal Directional Drilling HDD industry.
Connection Thread:
The threads of our landing and drill string cover all API Standard connection types and many NON-API
premium connections, as listed below:
Standard Connection Threads
API NC / REG / FH / IF
NSCC NSCC / NSCT
Grant Prideco HT Series / GPDS Series / XT Series
MISC. PAC / AOH
Remarks: The other thread connections not listed in this sheet will be provided upon requests.
MANUFACTURING PROCESS:
Hardbanding / Hardfacing
NOV Tuboscope TCS Titanium / TCS 8000
ARNCO 100XT 150XT 300XT 350XT
Welding Style Casing friendly (Flush) / Raised
Internal Coating
(Typically TK34 & TCS2000)
III. HEAVY WEIGHT DRILL PIPE Heavy Weight Drill Pipe (HWDP) is an intermediate weight drill stem component which is used in
conjuction with the drill pipes and drill collars. HWDP is available in standard, spiral and non-
magnetic designs. In some applications, HWDP can also be used instead of drill collars.
Our facility is awarded by the API and NS-1 / DS-1 certificate, which is made from one-piece AISI
4145H modified quenched and tempered steel. It is designed for tough drilling environment in vertical
and directional wells. HWDP is a transition member between drill collar and drill pipe. For directional
holes, HWDP provides weight-on-bit and additional stiffness to prevent buckling.
Features and Benefits:
● A center upset or wear pad to increase tube life, reduce hole drag and differential sticking problems.
● Connections are completed (phosphate coated) to protect them from the elements after machining
and to help prevent galling upon initial makeup.
● Thread roots are cold rolled on API and H90 connections. And pressed steel thread protectors are
supplied for standard connections.
● Hardbanding and internal coating can be provided upon customer's requests.
Product range 2-7/8" ~ 6-5/8"
Material AISI 4145H, AISI 1340
Type of End Finish Integral Type, Welded Type
Nominal
OD
Approx.
Weight
Body
OD
Upset
OD
Upset
Length
Elevator
Upset
OD
Connection
Yield Strength
Body Data
Tool Joint Data
Type
ID OD Pin/Box
Length
Body
Tool Joint
Tens.
Yield
Tors.
Yield
Tens.
Yield
Tors.
Yield
Recom.
MUT A B C D E F G I/H in lb/ft in in in in in in in Ksi Ksi lbs ft-lbs lbs ft-lbs ft-lbs
2-7/8 17.4 1-3/4
3-1/4 24 3-3/16 NC31 1-3/4 4-1/8 27/21 65 120 265600 12600 572200 14200 8500
3-1/2 25 2-1/16 4 24 3-5/8 NC38 2-1/16 4-3/4 27/21 65 120 408200 23100 764000 19200 11500
3-1/2 23.4 2-1/4
4 24 3-5/8 NC38 2-1/4 4-3/4 27/21 65 120 366900 21800 687700 19200 11500
4 38.8 2-1/2
4-1/2 24 4-3/16 NC40 2-1/2 5-1/4 27/21 65 120 497700 33300 758500 25600 15400
4-1/2 40.8 2-13/16
5 24 4-11/16 NC46 2-13/16 6-1/4 27/21 65 120 548100 47400 1024500 39700 23800
5 49.5 3 5-1/2 24 5-1/8 NC50 3 6-5/8 27/21 65 120 816800 66800 1278200 52900 31700
5-1/2 49.6 3-7/8
6 24 5-11/18 5-1/2FH
3-7/8 7 27/21 65 120 777700 76900 1182500 53100 31900
5-7/8 58.2 3-7/8
6-3/8 24 6 5-1/2FH
4 7 27/21 65 120 995500 100900 1265800 76200 45700
6-5/8 59 5 7-1/8 24 6-15/16 6-5/8FH
5 8 27/21 65 120 946400 120500 1233900 63800 38300
IV. DRILL COLLAR (SLICK & SPIRAL, NON-MAGNETIC)
4.1 Drill Collar Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drill
string in tension. Our drill collar is manufactured from AISI 4145HM quenched and tempered steel and is heat
treated along its entire length for uniform toughness and durability. Strict metallurgical tests are performed per
specifications to ensure that the heat treatment produces consistent and maximum hardness through the
depth of the bar.
Main Technical Parameters Size Range 2-7/8" - 11" Type of End Finish Slick, Spiral
Material AISI 4145HM, Non-Magnetic
Connection
OD Bore Dia. B.S.R. Length,
±6in
Tensile Strength
Impact Value
Hardness D d Round
Number
Yield
Strength
Tensile
Strength
Elongation inch (mm) inch (mm) ft Brinnel
NC23-31 3-1/8 (79.4) 1-1/4 (31.8) 2.57:1 30
min.
min.
min. 59ft·lb
NC26-36 (2-3/8IF) 3-1/2 (88.9) 1-1/2 (38.1) 2.42:1 30
NC31-41 (2-7/8IF) 4-1/4 (104.8) 2 (50.8) 2.43:1 30 or 31
NC35-47 4-3/4 (120.7) 2 (50.8) 2.58:1 30 or 31
NC38-50 (3-1/2IF) 5 (127) 2-1/4 (57.2) 2.38:1 30 or 31
NC44-60 6 (152.4) 2-1/4 (57.2) 2.49:1 30 or 31
NC44-60 6 (152.4) 2-13/16 (71.4) 2.84:1 30 or 31
NC44-62 6-1/4 (158.8) 2-1/4 (57.2) 2.91:1 30 or 31 110000psi
(≥
758Mpa)
140000psi
(≥
965Mpa)
min.
13%
(≥80J) 285-341 NC46-62 (4IF) 6-1/4 (158.8) 2-13/16 (71.4) 2.63:1 30 or 31
NC46-65 (4IF) 6-1/2 (165.1) 2-1/4 (57.2) 2.76:1 30 or 31
NC46-65 (4IF) 6-1/2 (165.1) 2-13/16 (71.4) 3.05:1 30 or 31
NC46-67 (4IF) 6-3/4 (171.5) 2-1/4 (57.2) 3.18:1 30 or 31
NC50-67 (4-1/2IF) 6-3/4 (171.5) 2-13/16 (71.4) 2.37:1 30 or 31
NC50-70 (4-1/2IF) 7 (177.8) 2-1/4 (57.2) 2.54:1 30 or 31
min.
100000psi
(≥
689Mpa)
min.
135000psi
(≥
931Mpa)
min.
13%
min. 59ft·lb
(≥80J)
285-341
NC50-70 (4-1/2IF) 7 (177.8) 2-13/16 (71.4) 2.73:1 30 or 31
NC50-72 (4-1/2IF) 7-1/4 (184.2) 2-13/16 (71.4) 3.12:1 30 or 31
NC56-77 7-3/4 (196.9) 2-13/16 (71.4) 2.70:1 30 or 31
NC56-80 8 (203.2) 2-13/16 (71.4) 3.02:1 30 or 31
6-5/8REG 8-1/4 (209.6) 2-13/16 (71.4) 2.93:1 30 or 31
NC61-90 9 (228.6) 2-13/16 (71.4) 3.17:1 30 or 31
7-5/8REG 9-1/2 (241.3) 3 (76.2) 2.81:1 30 or 31
NC70-97 9-3/4 (247.7) 3 (76.2) 2.57:1 30 or 31
NC70-100 10 (254) 3 (76.2) 2.81:1 30 or 31
8-5/8REG 11 (279.4) 3 (76.2) 2.84:1 30 or 31
Features and Benefits
· A hardness range of 285 to 341 BHN and a Charpy impact value of 40ft-lbs are guaranteed for evenly
distributed 16 points in any cross sections at environmental temperature.
· Connections are phosphate coated after maching to protect the threads from corrosive elements and to
prevent galling upon initial make-up.
· Thread roots are cold rolled on API and H-90 connections.
· Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connection.
· Slips and elevator grooves can be produced upon request.
Spiral Grooving
In order to reduce differential pressure sticking, the surface of drill collar can be spiral-grooved.
Spiral Grooved Drill Collars: Usual Sizes
OD 4-3/4" 6-1/4" 6-3/4" 7-1/4" 7-1/2" 8" 9-1/2" 10" 11"
Depth of cut (in)
7/32 9/32 5/16 11/32 11/32 3/8 13/32 7/16 15/32
±1/32 ±1/16 ±1/16 ±1/16 ±1/16 ±1/16 ±3/32 ±3/32 ±3/32
Spiral Pitch (in)
38 42 46 64 64 68 72 76 80
±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1 ±1
Note 1 - Loss of weight is approximative 4%, compared to slick drill collar.
Note 2 - Length of spiraled section allows reconditionning of connection.
Spiral Drill Collar with Slip and Elevator Slip
Stress Relief Grrove & Bore Back Box
Stress Relief Grooves improve bending strength of pin
and box connections and, therefore durability. Stress
relief grooves for box and pin are defined by API.
Bore back box is a gradual reduction of internal diameter
by gradually increasing material cross sectional area at
critical section. This will ultimately drastically reduce
stress concentration during static / dynamic loading and
prevents box connections from failure.
Hardbanding
We provide several hardbanding materials for customer's
option:
Arnco 100XT, Arnco 300XT, TCS 8000.
Slip and Elevator Recess
Slip and elevator recesses improve downhole handling
efficiency and safety. Slip and elevator recesses are
machined in accordance with API 7-1.
Drill Collar
Recommended Handbanding Location
Drill Collar with slip and elevator recesses (ZIP)
4" long wear pad above elevator recess.
1" long wear pad above slip recess.
10" long wear pad under slip recess.
Drill Collar with slip recess:
10" long wear pad under slip recess.
4" long wear pad above slip recess.
Drill Collar without slip and elevator recess: 10" long wear pad at 30"
from pin shoulder.
OD in A
in B in
R in
10 9-1/8 9-1/2 1/4
9-3/4 8-7/8 9-1/4 1/4 9-1/2 8-5/8 9 1/4
9-1/4 8-3/8 8-3/4 1/4
9 8-1/8 8-1/2 1/4
8-1/2 7-3/4 8 3/16
8 7-1/4 7-1/2 3/16
7-3/4 7 7-1/4 3/16
7-1/2 6-3/4 7 3/16
7-1/4 6-1/2 6-3/4 3/16
7 6-1/4 6-1/2 3/16
6-3/4 6 6-1/4 3/16
6-1/2 5-7/8 6 1/8
6-1/4 5-5/8 5-3/4 1/8
6 5-3/8 5-1/2 1/8
5-3/4 5-1/8 5-1/4 1/8
4-3/4 4-1/4 4-3/8 1/8
4-1/8 3-11/16 3-3/4 1/8
4.2 Non-Magnetic Drill Collar
Our non-magnetic drill collars are made from non-magnetic steel bars with low-strength by combining a
proper chemical analysis and rotary hammer forging process with low magnetic permeability and excellent
machinability. It will not interfere with the specialized directional equipment but rather will enhance the
performance of the drilling operation.
The non-magnetic drill collars function as a housing for the MWD tools, while
at the same time provide the weight for drill string. The non-magnetic drill
collars are suitable for all types of drilling including straight and directional
applications.
Each drill collar is fully inspected by our internal inspection department. All
data obtained are recorded on the inspection certificate furnished with each
drill collar. API Monogram, serial number, OD, ID, type and size of
connections are stamped on the recessed mill flats.
We manufacture three types of non-magnetic drill collars according to the
customer's order, including Slick, Spiral and Flex Non-Mag Drill Collars.
Slick Non-Mag Drill Collar
Our slick non-mag drill collar provides the required weight on bit, and will not
interfere with the directional drilling ability.
Spiral Non-Mag Drill Collar
Our spiral non-mag drill collar is designed to allow greater flow area for drilling
fluids, while providing the benefits of non-mag steel for complex drilling
programs.
Flex Non-Mag Drill Collar
Our non-mag drill collar is thinner and more flexible than standard drill collar. Their ability to make short radius
turns, bend for high build angles, and pass through severe doglegs makes them ideal for use in directional
and horizontal applications. Manufactured with non-magnetic steel, this drill collar is well suitable for housing
MWD equipments.
V. ROLLER REAMER Roller Reamers are designed for reaming and stabilization in any type of formation. All parts of the tool are
made of special alloy steel and heat treated fro hardness. Drilling crews can easily replace any part in the filed without using
any special tools.
We offer three types of cutters for different types of formation.
Type A Type B Type C Hard Formation Medium to Hard Fromation Soft Formation
Main Technical Parameter
Hole Size (in)
Thread Type (API)
O.D. I.D.
(mm) (mm)
6-1/8 3-1/2IF 155 31.7
8-1/8 4IF 206 38
8-3/8 4-1/2IF 212.7 44
8-1/2 4-1/2IF 215.9 44
9-5/8 NC50 244 57
12-1/4 6-5/8REG 311.2 71
17-1/2 7-5/8REG 444.5 76
26 7-5/8REG 660.4 76
28 7-5/8REG 711 76
30 7-5/8REG 762 76
32 7-5/8REG 812 76
36 7-5/8REG 914 76
VI. STABILIZER
6.1 Integral Blade Stabilizer Integral Blade Stabilizer (IBS) is a one-piece rotating stabilizer which can be placed near bit or higher in the
drill string. It is a one-piece structure manufactured from high strength alloy steel (non-magnetic steel optional),
that prevents differential sticking of the drillstring by stabilizing the BHA and keeping drill collars and drill pipes
away from the borehole wall. This reduces vibration, drill pipe whirl, and wellbore tortuosity; furthermore, the
stabilization maintains drilling trajectory whether drilling straight, horizontal or directional wells.
Optional Stabilizers We offer several options for IBS, in both alloy steel and non-magnetic materials. ● Spiral Integral Blade Stabilizer; ● Straight Integral Blade Stabilizer; ● Non-Magnetic Integral Blade Stabilizer;
Specification - Spiral Integral Blade Stabilizer
OD Stab
Body OD
Bore Fishing neck
length Crown Length
Blade taper angle Overall
Length
Connection
Top Down Top Down
3-3/4“
95.3mm
3-1/8"
79.4mm
1-1/4"
31.8mm
26"
660mm
10"
254mm
30°
15° 58"
1480mm
NC23B
NC23P
3-3/4"
95.3mm
3-1/8"
79.4mm
1-1/4"
31.8mm
26"
660mm
10"
254mm
30°
15° 58"
1480mm
NC23B
2-3/8"REGB
4-1/2"
114.3mm
3-1/2"
88.9mm
1-1/2"
38.1mm
26"
660mm
10"
254mm
30°
15° 59"
1500mm
NC26B
NC26P
4-1/2"
114.3mm
3-1/2"
88.9mm
1-1/2"
38.1mm
26"
660mm
10"
254mm
30°
15° 59"
1500mm
NC26B
2-3/8"REGB
5-1/2"
139.7mm
4-3/4"
120.6mm
2"
50.8mm
30"
762mm
12"
305mm
30°
15° 68"
1730mm
NC38B
NC38P
5-1/2"
139.7mm
4-3/4"
120.6mm
2"
50.8mm
30"
762mm
12"
305mm
30°
15° 68"
1730mm
NC38B
3-1/2"REGB
6"
152.4mm
4-3/4"
120.6mm
2"
50.8mm
30"
762mm
12"
305mm
30°
15° 69"
1760mm
NC38B
NC38P
6"
152.4mm
4-3/4"
120.6mm
2"
50.8mm
30"
762mm
12"
305mm
30°
15° 69"
1760mm
NC38B
3-1/2"REGB
7-1/2"
190.5mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
NC46P
7-1/2"
190.5mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
4-1/2"REGB
7-7/8"
200mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
NC46P
7-7/8"
200mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
4-1/2"REGB
8"
203.2mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
NC50P
8"
203.2mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
4-1/2"REGB
8-1/2"
215mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
NC50P
8-1/2"
215mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
4-1/2"REGB
9-1/2"
241.3mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 75"
1900mm
NC50B
NC50P
9-1/2"
241.3mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 75"
1900mm
NC50B
4-1/2"REGB
(To be continued) Specification - Spiral Integral Blade Stabilizer (Continued 1)
OD Stab
Body OD
Bore
Fishing neck length
Crown Length
Blade taper angle Overall
Length
Connection
Top Down Top Down
12" 304.8mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGP
12" 304.8mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGB
12-1/4"
311mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGP
12-1/4"
311mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGB
14-3/4"
374mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 84"
2140mm
6-5/8"REGB
6-5/8"REGP
14-3/4"
374mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 84"
2140mm
6-5/8"REGB
6-5/8"REGB
15-1/2" 393.7mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 85"
2160mm
6-5/8"REGB
6-5/8"REGP
15-1/2" 393.7mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 85"
2160mm
6-5/8"REGB
6-5/8"REGB
16" 406.4mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 85"
2160mm
7-5/8"REGB
7-5/8"REGP
16" 406.4mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 85"
2160mm
7-5/8"REGB
7-5/8"REGB
17" 431.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGP
17" 431.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGB
17-1/2"
444mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGP
17-1/2"
444mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGB
20"
508mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 92"
2340mm
7-5/8"REGB
7-5/8"REGP
20"
508mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 92"
2340mm
7-5/8"REGB
7-5/8"REGB
22" 558.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
35°
35° 92"
2340mm
7-5/8"REGB
7-5/8"REGP
22" 558.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
35°
35° 92"
2340mm
7-5/8"REGB
7-5/8"REGB
(To be continued)
Specification -
Spiral Integral Blade Stabilizer (Continued 2)
OD Stab
Body OD
Bore
Fishing neck length
Crown Length
Blade taper angle Overall
Length
Connection
Top Down Top Down
24" 609.6mm
9-1/2"
241.3mm
3"
76.2mm
32"
813mm
20"
508mm
45°
45° 97"
2460mm
7-5/8"REGB
7-5/8"REGP
24" 609.6mm
9-1/2"
241.3mm
3"
76.2mm
32"
813mm
20"
508mm
45°
45° 97"
2460mm
7-5/8"REGB
7-5/8"REGB
26"
660mm
9-1/2"
241.3mm
3"
76.2mm
32"
813mm
20"
508mm
45°
45° 100"
2540mm
7-5/8"REGB
7-5/8"REGP
26"
660mm
9-1/2"
241.3mm
3"
76.2mm
32"
813mm
20"
508mm
45°
45° 100"
2540mm
7-5/8"REGB
7-5/8"REGB
28"
711mm
9-1/2"
241.3mm
3"
76.2mm
32"
813mm
20"
508mm
45°
45° 102"
2590mm
7-5/8"REGB
7-5/8"REGP
28"
711mm
9-1/2"
241.3mm
3"
76.2mm
32"
813mm
20"
508mm
45°
45° 102"
2590mm
7-5/8"REGB
7-5/8"REGB
30"
762mm
9-1/2"
241.3mm
3"
76.2mm
34"
864mm
20"
508mm
45°
45° 107"
2720mm
7-5/8"REGB
7-5/8"REGP
30"
762mm
9-1/2"
241.3mm
3"
76.2mm
34"
864mm
20"
508mm
45°
45° 107"
2720mm
7-5/8"REGB
7-5/8"REGB
36"
914mm
9-1/2"
241.3mm
3"
76.2mm
36"
914mm
20"
508mm
45°
45° 120"
3050mm
7-5/8"REGB
7-5/8"REGP
36"
914mm
9-1/2"
241.3mm
3"
76.2mm
36"
914mm
20"
508mm
45°
45° 120"
3050mm
7-5/8"REGB
7-5/8"REGB
Straight Integral Blade Stabilizer
OD Stab
Body OD
Bore Fishing neck
length
Crown Length
Blade taper angle Overall
Length
Connection
Top Down Top Down
6"
152.4mm
4-3/4"
120.6mm
2"
50.8mm
30"
762mm
12"
305mm
30°
15° 69"
1760mm
NC38B
NC38P
6"
152.4mm
4-3/4"
120.6mm
2"
50.8mm
30"
762mm
12"
305mm
30°
15° 69"
1760mm
NC38B
3-1/2"REGB
7-1/2"
190.5mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
NC46P
7-1/2"
190.5mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
4-1/2"REGB
7-7/8"
200mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
NC46P
7-7/8"
200mm
6-1/2"
165.1mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 72"
1830mm
NC46B
4-1/2"REGB
8"
203.2mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
NC50P
Specification -
8"
203.2mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
4-1/2"REGB
8-1/2"
215mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
NC50P
8-1/2"
215mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 73"
1860mm
NC50B
4-1/2"REGB
9-1/2"
241.3mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 75"
1900mm
NC50B
NC50P
9-1/2"
241.3mm
6-3/4"
171mm
2-13/16"
71.4mm
30"
762mm
16"
406mm
30°
30° 75"
1900mm
NC50B
4-1/2"REGB
12" 304.8mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGP
12" 304.8mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGB
12-1/4"
311mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGP
12-1/4"
311mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 79"
2010mm
6-5/8"REGB
6-5/8"REGB
14-3/4"
374mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 84"
2140mm
6-5/8"REGB
6-5/8"REGP
14-3/4"
374mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 84"
2140mm
6-5/8"REGB
6-5/8"REGB
Straight Integral Blade Stabilizer 15-1/2"
393.7mm 8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 85"
2160mm
6-5/8"REGB
6-5/8"REGP
15-1/2" 393.7mm
8"
203.2mm
2-13/16"
71.4mm
30"
762mm
18"
457mm
30°
30° 85"
2160mm
6-5/8"REGB
6-5/8"REGB
16" 406.4mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 85"
2160mm
7-5/8"REGB
7-5/8"REGP
16" 406.4mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 85"
2160mm
7-5/8"REGB
7-5/8"REGB
17" 431.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGP
17" 431.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGB
17-1/2"
444mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGP
17-1/2"
444mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 88"
2240mm
7-5/8"REGB
7-5/8"REGB
20"
508mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 92"
2340mm
7-5/8"REGB
7-5/8"REGP
Specification -
20"
508mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
30°
30° 92"
2340mm
7-5/8"REGB
7-5/8"REGB
22" 558.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
35°
35° 92"
2340mm
7-5/8"REGB
7-5/8"REGP
22" 558.8mm
9-1/2"
241.3mm
3"
76.2mm
30"
762mm
20"
508mm
35°
35° 92"
2340mm
7-5/8"REGB
7-5/8"REGB
6.2 Replaceable Sleeve Stabilizer
Replaceable sleeve stabilizer is special tool suitable for directional well drilling, consisting of an
integral mandrel and a sleeve. One mandrel series can be equipped with different sizes of sleeve for
several hole sizes. The stabilizer sleeve can be changed quickly and easily after sleeve hard banding
is worn-out. There’re two styles available: 2-piece stabilizer, and 3-piece stabilizer.
Main Technical Parameter
Bit Dia.
(in)
DC Dia.
(in)
Sleeve Stabilizer Body Thread Code on Both Ends
Length
(mm)
Work
O.D.
(mm)
Upset
End Dia.
(mm)
Upset End length (mm)
Fishing
Neck Length
(mm)
I.D.
(mm)
Make-up
Torque
(KN.m)
Over length L (mm)
Drill String Near Bit
Near Bit
Drill
String
Top Down
Top Down
8-1/2
6-1/2
480 214
190
200
600
71
6.95 ~
7.25
1,800 ~
1,900
1,800 ~
1,900
4-1/2
IF
4-1/2
IF
4-1/2
IF
4-1/2
REG
8-1/4 470 210
8 472 203
7-3/4 455 197
12-1/4
8
555 310
238
76
19. 7~
11
1,800 ~
2,000
1,800 ~
2,000
6-5/8
REG
6-5/8
REG
6-5/8
REG
6-5/8
REG
12 550 305
11-1/2 540 292
11 530 279
17-1/2
9
682 444
279
13.85 ~
16.55
7-5/8
REG
7-5/8
REG
7-5/8
REG
7-5/8
REG
17 676 432
16-1/2 670 420
16
644
407
22 2,000 ~
2,200
2,000 ~
2,200
24
26
6.3 Non-Rotating Stabilizer Non-rotating stabilizer (rubber sleeve stabilizer) is able to avoid blade wear and wall damage during
drilling. The non-rotating stabilizer consists of mandrel, copper washer, rubber sleeve, spacer sleeve
and self-locking lower sub.
During drilling, the non-rotating stabilizer transfers the torque by means of mandrel. The rubber sleeve
is sliding and moving relative to the mandrel and it plays a role in stabilizing the well. A locking clutch
(self-locking lower sub) will help to avoid sleeve rotation during washover operation.
Main Technical Parameter
Hole Size
(in)
Stabilizer Sleeve Stabilizer Body Overall Length
(mm) Length (mm)
O.D. (mm)
Blade Qty ID (mm) Fishing O.D. (mm)
Thread Type
13-3/8 500 313 4 71 165 4-1/2 IF 2,000
10-3/4 500 255 4 71 165 4-1/2IF 2,000
9-5/8 500 220 4 71 165 4-1/2IF 2,000
7 380 157 4 44 127 4-1/2IF 1,600
12-1/4 523 310 4 76 215 6-1/8REG 2,010
16 543 405 4 76 241 7-5/8REG 2,210
17 543 430 4 76 241 7-5/8REG 2,210
22 635 558 4 76 241 7-5/8REG 2,210
28 715 711 5 76 241 7-5/8REG 2,210
6.4 Float Valve Stabilizer Float valve stabilizer is effective tool in drilling operation. The stabilizer is connected at upper part of drill
bit, and the float valve assembly in stabilizer is near the bit thread. Such structure of stabilizer can
realize the automatically shutting off inside bore of tool to avoid the accident.
Main Technical Parameter
Stabilizer Type Stabilizer Body
O.D. (mm) Stabilizer Thread Float Valve Assembly
O.D. (mm)
Float Valve Assembly
Length (mm)
FV711 228 241 7-5/8 REG 121 298.4
FV588 228 241 7-5/8 REG 121 298.4
FV444 228 241 7-5/8 REG 121 298.4
FV311 203 209.6 6-5/8 REG 121 298.4
FV241 178 4-1/2 IF 98 247.6
FV214 178 165 4-1/2 REG 88 211.14
FV152 127 121 3-1/2 REG 61 165.1
6.5 Spherical Stabilizer Spherical stabilizer is new tool for various drilling operation. We provide spherical stabilizer from
6~ 12 1/4 inch.
Main Technical Parameters
Working O.D.
(in)
Body O.D. on
Both Ends
(mm)
I.D. (mm)
Stabilizer Length
(mm)
Thread on Both Stabilizer Ends (in)
String Type Near Bit Type
Top Down Top Down
6~6-1/2 121 51 785 3-1/2IF 3-1/2IF 3-1/2IF 3-1/2REG
7~7-7/8 159 57 850 4-1/2IF 4-1/2IF 4-1/2IF 4-1/2REG
8~8-1/2 165 71 850 4-1/2IF 4-1/2IF 4-1/2IF 4-1/2REG
9~9-1/4 197 71 870 4-1/2IF 4-1/2IF 4-1/2IF 4-1/2REG
12~12-1/4 203 76 940 6-5/8REG 6-5/8REG 6-5/8REG 6-5/8REG
Hard Facing Spiral Stabilizers Stabilizers are connected with drill collar accessories to make up the downhole drill stem. Hard Facing
stabilizers have high tensile, high-wearing feature and recoverability features. This particular dressing
comprises tungsten carbide inserts set in a power spray deposit, which is ideal for abrasive formations.
Area of tungsten carbide inserts coverage on the surface of hardfacing reaches more than 60%.
Hardfacing dressing is some special tungsten-carbide powder. It can get more strength and toughness
after the welding procedure. It can ensure the hardfacing’s abrasion resistance and not easily pull-out
to cause damage. We take full account of chemical composition of the material and the need for
repeated redressing without damage for our dressing technique. A well-controlled welding temperature
can result in a reliable surface alloy welding operation. The composition plane can reach more than
Hard Facing Stabilizers are based on the advanced technology from abroad.
◆ This type of stabilizers are generally used in abrasive rock formation in the
international drilling market.
◆ This kind of stabilizer’s hardfacing is firstly invented at home.
◆ This kind of stabilizer is prior to the traditional insert alloy column type
a. Traditional insert alloy column type stabilizer are easily pull - ou t and will cause damage to the drill bit.
b. It has a longer service life than traditional inlaid alloy column type
c. This type of stabilizers are easy to repair, to reduce the well drilling costs.
97%. Hard Facing Stabilizers can be cleaned by acetylene burner after abrasion. When the cleaning
process is completed, new hard facing can be welded on the surface, proving the better recoverability.
Features:
stabilizer.
stabiliz
er.
We offer a complete range of Hardfacing to suit all drilling conditions. All stabilizers can be banded
with the following hardfacing.
Crushed tungsten carbide held in a nickel bronze
matrix. The 3mm grain size ensures greater
concentration of carbide which is ideal for soft
formation drilling.
Trapezoidal tungsten carbide inserts held in a sintered carbide nickel bronze matrix. This will give a greater depth of carbide coverage - ideal for high deviation drilling in abrasive formations.
Tungsten carbide inserts set in a powder spray
deposit ideal for abrasive formations. 97%
bonding guaranteed, certified by ultrasonic report.
Recommended for non-magnetic stabilizers.
Tungsten carbide inserts (button type). The inserts have been developed to allow cold insertion and maintain close fit. A greater concentration of inserts on the bottom third of the blade and leading edge will increase surface contact to reduce wear in highly abrasive formations.
VII. KELLY ( SQUARE AND HEXAGONAL) Kelly is main driver of the whole drill string. It transmits torsional energy from the rotary table through
the drill string to the bit at the bottom of the hole. The kelly is a long square or hexagonal, precision
machined heavy steel bar that is supported by the swivel through the rotary table and is connected to
the first joint of drill pipe in the drill string.
The kelly has been approved by NS-1 certification. Straightness of the kelly is very crucial in the
manufacturing process, thus straightness inspections are carried out before, during and after each
The oxy-acetylene process applies tough molten carbide particles of varying sizes held in a nickel chrome matrix which provides excellent bonding properties and greater surface wear characteristics are achieved. Surface hardness levels over 40HRC. Ideal for Geo-Thermal
applications over 350℃.
This process is a highly automated way of applying hardface and utilizes a combined arc / plasma stream on the work piece surface. This results a low base metal dilution and a dense, uniform coating, the filling medium can be variety of hardfacing consumables.
machining operation. The flats are precision-milled to API and NS-1 specifications. All milling
processes are performed on specially designed rigid kelly mills to ensure tight tolerance and high
quality drive sections. Each kelly is furnished with a pressed steel thread protector.
Features and Benefits:
● Manufactured from AISI 4145H modified, fully heat treated alloy steel with a brinell hardness range
of 285-341BHN and a minimum average Charpy impact value of 40ft-lbs;
● Ends and drive sections, IDs and connections machined and inspected to
API and NS-1 specifications; ● Ultrasonic inspection is performed on all
sections; ● Shipped in a protective steel-cased scabbard.
Main Technical Parameters
Kelly
Size
(In)
Length
(In)
Upper Box Connection Lower Pin
Connection
I.D.
(mm)
Driving Section Type(LH) O.D. Cross
Flat
(mm)
For
Square
(mm)
Cross Corner for Hex
Standard
Optional Standard
(mm)
Optional
(mm)
Thread O.D.
(mm)
2/1/2 12.19 6-5/8REG 4-1/2REG 196.8 146 85.7 31.8 63.5 83.3 3 12.19 6-5/8REG 4-1/2REG 196.8 146 NC26 104.8 44.4 76.2 100 85.7
3/1/2 12.19 6-5/8REG 4-1/2REG 196.8 146 NC31 120.6 57.2 88.9 115.1 100.8
4/1/4 12.9
6-5/8REG
4-1/2REG
196.8
146
NC38 158.8 71.4 108 141.3 122.2
NC38 161.9 71.4 108 141.3 122.2
5/1/4 12.9
6-5/8REG
4-1/2REG
196.8
146
NC46 177.8 82.6 133.3 175.4 151.6
NC50 177.8 82.6 133.3 175.4 151.6
6 12.9
6-5/8REG
196.8
146
5-1/2FH 152.4 173
NC56 152.4 173
VIII. HOLE OPENER
IX. DRILL STRING ACCESSORIES
9.1 Lifting Subs Drill tool lifting sub is a special tool for lifting the drill tools in petroleum natural gas industry and geologic
exploration. Drill tool lifting sub is divided into two types: 18 degree shoulder and 90 degree shoulder.
The lifting sub can be selected according to elevator structure.
Main Technical Parameters
No. Nominal size (mm)
I.D.(mm)
End of pin Lifting end
Connection
O.D.(mm)
DF/mm
Tong Space
LPB/mm
O.D.(mm)
Tong Space
LPB/mm
1 73
31.8 NC23 79.4 76.2
250
111.1
100
2 44.5 NC26 88.9 82.9
3 89
54 NC31 104.8 100.4 127
4 50.8 NC35 120.7 114.7
5 68.3 NC38 127 121
6 127
71.4
NC44 152.4 144.5 168.3
7 158.8 149.2
8 158.8 150
9 NC46
165.1 154.8
10 171.5 159.5
11 82.6 NC50
177.8 164.7
12 184.2 169.5
13 NC56
196.8 185.3
300
14 203.2 190.1
15
95.3
6 5/8 REG 209.6 195.7
16 NC61 228.6 212.7
17 7 5/8 REG 241.3 223.8
18 NC70
247.7 232.6
19 254 237.3
20 NV77 279.4 260.7
9.2 Crossover Subs
Cross-over sub acts for conversion and connection of drill stem component in petroleum, natural gas
and geology drilling work. It is used mainly for connecting of upper drill tools and lower drill tools during
drilling operations. These crossovers can be divided into two groups: Straight OD Crossover Sub and
Reduced Section Crossover Sub.
Straight OD Sub
Straight OD sub is used to connect drill stem members that have a similar outside diameter. The drill
bit, downhole tools, heavy weight drill pipe and drill pipe can be crossed over using a straight OD sub.
Reduced Section Sub
Reduced Section Sub is used to connect drill stem parts that have different diameters. This sub can
be used to crossover large OD drilling tools or a tapered drill collar string.
Main Technical Parameters
Sort Description Upper Connection Part Lower Connection Part Type
1 Kelly cross-over sub Kelly Drill pipe A or B
2 Drill pipe cross-over sub Drill pipe Drill pipe A or B
3 Interim cross-over sub Drill pipe Drill collar A or B
4 Drill collar cross-over sub Drill collar Drill collar A or B
5 Drill bit cross-over sub Drill collar Drill bit A or B
6 Swivel cross-over sub Swivel lower sub Kelly C
7
Fishing cross-over sub
Kelly Drill pipe C
Drill pipe Fishing tools C
9.3 Lifting Plug & Cap
Lifting cap is a special tool for lifting of drilling tools in petroleum, natural gas, drilling engineering and
geographical exploration.
Main Technical Parameters
Connection O.D. (mm) Length (mm) Connection O.D. (mm) Length (mm)
7 5/8 REG Pin 210 290 7 5/8 REG Box 230 290
6 5/8 REG Pin 190 280 6 5/8 REG Box 200 280
NC50 Pin 155 270 NC50 Box 160 260
NC46 Pin 150 270 NC46 Box 160 260
NC38 Pin 115 260 NC38 Box 120 270
NC31 Pin 100 210 NC31 Box 120 220
2 3/8 REG Pin 80 190 2 3/8 REG Box 110 200
NC26 Pin 89 200 NC26 Box 110 200
3 1/2 REG Pin 100 220 3 1/2 REG Box 130 270
4 1/2 REG Pin 145 260 4 1/2 REG Box 160 260
2 7/8 EUE Pin 80 220 2 7/8 EUE Box 80 220
9.4 Kelly / Top Drive Saver Subs When rods is added to increase the depth of drilling, the loosening of the threads are now performed
at the bottom end of the saver sub as opposed to the bottom of the Kelly or Top Drive which is the
most valuable part of the drill string. This means that the connection between the top end of the saver
sub and kelly/ Top Drive is seldom used, and suffers minimal wear and tear, whereas the lower
connection is used in almost all cases displacing the most wear and tear from the rotary head
connection to the much cheaper Saver Sub which is expendable and reduce costs.
9.5 Oriented Bent Sub The oriented bent sub is a major power deflection tool, having a fixed angle deviated from the low
end thread of the bent sub to the axial line of drill stem. Under the application of oriented bent sub,
the power drill tool give the bit a constant lateral force to ensure that the bit can cut on the well wall
laterally and further drill into a curved well trace.
OD. Mm (in)
Connection Bent Angle
(Deg.)
ID, Oriented Sleeve (mm)
Box Pin
89 (3-1/2) NC26 NC26 2 36
105 (4-1/8) NC31 NC31 2 36
127 (5) NC38 NC38 2 36
159 (6-1/4) NC46 NC46 2 50
165 (6-1/2) NC50 NC50 2 50
178 (7) 5-1/2FH 5-1/2FH 2 50
203 (8) 6-5/8REG
6-5/8REG
2 50
9.6 Drill Bit Sub
9.7 Wear Sub During Drilling operation, major wear and tear wear often take place between drill pipes and casings.
Wear Sub is used to avoid such wear between drill pipes and casings. With features, such as compact
structure adn easy operation, wear sub can prolong the service life of drill pipe and casing and reduce
the vibration and trembling of drilling tools. It can also limit the contact friction between metals.
The wear sub consists of a highly wear rubber sleeve, a metal stiffening liner and a sub body. The
rubber sleeve is installed in the middle of sub body and some clearance is given to allow sleeve to
rotate freely. The rubber sleeves are made of rubber mixtures with good wear resistance.
During drilling operation, the rubber sleeve and sub body can make a relative rotation. The rubber
sleeve OD is larger than drill pipe tool joint OD, therefore the tool joint and drill pipes cannot come in
contact with casing. The rubber sleeve on wear sub will first contact casing. When friction between
rubber sleeve and casing takes place, wearing can be reduced due to the rubber sleeve wear
resistance and softness. Usage of tool joints of drill pipes and drill string tools will also be reduced.
Spec Body OD mm Sub OD mm ID mm Connection
7" Casing 121 143 38.1 3-1/2IF
9-5/8" Casing 168 190 71.4 4-1/2IF
178 197 71.4 5-1/2IF
10-3/4" Casing
180 225 71.4 4-1/2IF
5-1/2IF
13-3/8" Casing
203 285 71.4 5-1/2IF
9.8 Float Valve Sub Float valve sub is an important tool in petroleum exploration and drilling engineering. The float valve
sub is connected at upper part of drill bit. The float valve sub is near the bit connecting thread. The
float valve sub can also be used at different necessary position of drill string when required. The main
application is, when connected with single piece pipe, it prevents mud from coming in and up blocking
the hole. When blowout takes place, blowout in drill string will be avoided because nozzle is closed
automatically by valve cap of the float valve assembly.
Sub OD mm Joint Connection Valve OD mm ID mm
241.3 7-5/8 REG BXB 121 (5F6R) 76.2
228.6 7-5/8 REG BXB 121 (5F6R) 76.2
209.6 6-5/8 REG BXB 121 (5F6R) 71.4
203.2 6-5/8 REG BXB 121 (5F6R) 71.4
177.8 4-1/2 REG B X NC50 B 88 (4R) 71.4
165.1 4-1/2 REG B X NC50 B 88 (4R) 71.4
158.8 4-1/2 REG B X NC46 B 88 (4R) 71.4
127 3-1/2 REG B X NC38 B 61 (2F3R) 50.8
104.8 2-7/8 REG B X NC31 B 48 (1F2R) 38.1
Brazil Office
Zyon Petroleum Consultoria e Representações Ltda Tel: +55 22 2765-4408 Address: Alameda Jequitibá, 90 Granja dos Cavaleiros. Macaé/RJ Post Code:27930-730
China Office
Seven Oceans Habitat Offshore Co.,Limited Tel: 0411-3973 1871 / 3973 1872 / 3973 1873 Fax: 0411-3973 1875
Address: NO.76&78 Hui Xin Street,Gan Jing Zi District, Dalian, China 地址:大连市甘井子区汇信街 76-78号
Post Code:116091
E-mail : [email protected]
Website: www.zyonpetroleum.com