OCTG Connections - myskills.my (2018).pdf · 2019/5/2 2 Confidential Service Loads 3 Internal Pressure – Pipes are subjected to high internal pressures during: Drilling operations,

2019/5/2

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Confidential

MalaysiaApril, 2019

OCTG Connections

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Confidential

OCTG Connections

Oilfield tubulars require a method of joining individual lengths together.

Transportation limitations, handling on location, and rig capacity for running or pulling tubulars dictate that in order to install a string that is thousands of feet in length hundreds of connections must be made at the location.

Unfortunately every connection is effectively a potential leak path.

So the ability of threaded connections to support string loads and not leak cannot be over estimated.

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Service Loads

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Internal Pressure – Pipes are subjected to high internal pressures during: Drilling operations, loss of circulation Encountering high pressure formationsWell Control events, tubing failures Production flow High pressure fraq’s or well stimulations Pumping cement or green cement tests

Internal Pressure – Pipes are subjected to high internal pressures during: Drilling operations, loss of circulation Encountering high pressure formationsWell Control events, tubing failures Production flow High pressure fraq’s or well stimulations Pumping cement or green cement tests

External Pressure – External pressure loads can be encountered during: Drilling – Evacuated casing Annular leaks from internal strings Formation Pressures Cementing

External Pressure – External pressure loads can be encountered during: Drilling – Evacuated casing Annular leaks from internal strings Formation Pressures Cementing

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Service Loads - Tension

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Tension loads can occur when: Running tubulars due to string weight Over pull for landing the string Pulling pipe Stuck strings Ballooning during high pressure fracturing Contraction when well is shut in

The effects of tension loads on connections must be taken into consideration, particularly for connections weaker than the pipe body.

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Service Loads – Compression

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Compression loads can loads occur when: Running tubulars due to Buoyancy or stuck pipe

Setting down hole tools Stuck pipe or tight spots Compaction due to subsidence String lengthening due to thermal expansion during

production Negative ballooning due to high external pressure

The effects of compression loads on connections must also be taken into consideration, due to effects on sealing

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Performance Calculations

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DkfP twallymniYAPI /)(2

Internal Pressure – Equation 10

)875.0(WallMinAPIforFactork

DiameterPipeD

ThicknessWallPipet

StrengthYieldPipef

wall

ymn

Example 7” 35# Q-125 (nominal wall 0.498” wt)

psiPiYAPI 562,157498.0875.0000,1252

Pipe Body Yield Strength - Equation 11

pymnYAPI AfF

diameterinsidePiped

DiameterPipeD

dDAPipeofAreaA

StrengthYieldPipef

pp

ymn

224,


kip

lbsFYAPI

272,11000558,271,1

558,271,11725.10000,125

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External (Collapse) Pressure

Collapse pressure is determined by one of four equations:• Yield Strength Collapse – Uses pipe yield strength.• Plastic Collapse – Based on physical tests.• Transition Collapse – Based on physical tests.• Elastic Collapse – Based on elastic instability of steel and

Young’s Modulus (independent of material yield strength).

The equation to be used is based on the D/t ratio of the pipe body.

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API Collapse is divided into 4 categories based on D/t ratio.

D/t

Co

llap

se P

ress

ure

YieldCollapse

PlasticCollapse

TransitionCollapse

ElasticCollapsePYp = 2fymn[(D/t) - 1]/[(D/t)2]

PP = fymn[Ac/(D/t) - Bc] - Cc

PT = fymn[Fc/(D/t) - Gc]

PE = 46.95x106/[(D/t)(D/t – 1)2]Reach the yield point before collapse

Collapse with plastic property

Collapse between plastic and elastic property

fyms： SMYSA,B,C,F,G： Polynomial of fyms

(theoretical formula)

(empirical formula)

(empirical formula)

Collapse with elastic property

Independent of YS

Smaller ODThicker WT

Larger ODThinner WT

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9


Looking through tables 5, 6, 7 and 8 in API 5C3 section 8, you will see that thisD/t ratio for 7” 35# Q125 material falls under plastic collapse in table 6.

056.14/

000,125

"498.0

"7

tD

psif

t

D

ymn

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10

0582.0239.3/0895.0106.2

/

106.2}239.3/0895.02/239.3/0895.301

239.3/0895.0239.3/0895.02/239.3/0895.03000,125/239.3/0895.02/239.3/0895.031095.46

/2//31//2//3//2//31095.46

3301000,1251036989.0000,1251010483.0000,125030867.093.465

1036989.01010483.0030867.093.465

0895.0000,1251050609.0026233.0

1050609.0026233.0

239.3000,1251053132.0000,1251021301.0000,1251010679.08762.2

1053132.01021301.01010679.08762.2

(53) formula collapse API historicalin constant Empirical





2

36

236

31327

31327

6

6

316265

3162105

c

cccc

c

ccccccccccymnccccc

c

ymnymnymnc

c

ymnc

c

ymnymnymnc

ymn

c

c

c

c

c

G

ABFG

F

ABABABABABfABABF

C

fffC

B

fB

A

fffA

StrengthYieldPipef

G

F

C

B

A

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11

API collapse Pressure

Plastic collapse pressure equation 37

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Service Loads - Triaxial

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Radial Stress

Hoop Stress

Axial Stress

r

In a given string of pipe, the string and the connections are subjected to three types of stresses depending on the loads and location in the string

Internal and external pressure loads

Tension, compression and bending

These three dimensional (triaxial) stresses can be plotted as a Von Mises Ellipse (VME) and compared to the pipe body.

This triaxial loading is the basis for connection testing and qualification

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Von Mises Ellipse (VME)

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Quadrant 2Internal Pressure + Compression

Quadrant 1Internal Pressure + Tension

Quadrant 3External Pressure + Compression

Quadrant 4External Pressure + Tension

95% Test Load

Pipe Body VME Test Load Points

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Types of Connections

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Definition of Connections

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Category Feature

Non-Premuim

Thread seal connection API connections

Semi-Premium

Thread seal connectionwith some extrafeatures

Hunting BossGeoConn

Premium Connection withmetal to metal Seal

JFEBEARJFELIONVAM-TOPVAM21Tenaris BlueHydril 500

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• API connections

– Threaded and coupled only – Limits on joint strength which may be less than pipe body yield strength.

– Thread seal – Helical path sealed by lubricant is not guaranteed to be gas tight

– No ratings for compression loads

– Eight round (8rd) has lower joint strength on casing sizes but for upset (EUE) has joint strength equal to pipe body

– Buttress has higher joint strength than 8rd but lower sealability

– API connections have higher stress levels compared to shouldered premium joint (PJ) connections. This can lead to thread galling and/or coupling failures under even mild sour environments

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• Premium connections

– Threaded and coupled – Normally equal to pipe body YS

– Integral flush or semi-flush for greater clearance

– Metal seals for gas tightness

– Torque shoulder adds seal energy and reduces hoop stresses

– High bending and high compression up to pipe body

– Availability of dope elimination option

– High torque options

– Computer controlled make-up

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API vs. Premium Joints

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Designation Thread form TPI Taper

Casing4 ½”～

20”

STC (Short thread & coupled ) 8 Round thread 8 1 /16

LTC (Long thread & coupled ) 8 Round thread 8 1 /16

BTC (Buttress thread & coupled ) ≤ 13 3/8” Buttress thread 5 1 /16

BTC (Buttress thread & coupled ) ≥ 16” Buttress thread 5 1/12

Tubing～4 ½”

NUE (Non-upset end) 10 Round thread 10 1 /16

EUE (Upset end) 8 Round thread 8 1 /16

7.6

56

STC CPLGcenter

LTC CPLGcenter

LTC CPLG L = 9.0"

STC LTC

STC CPLG L = 7.25"

CPLG L = 10.0"

BTC

• American Petroleum Institute (API) specifies Connections for Oil & Gasindustries. API connections are utilized world wide.

EUE

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Joint Strength of 8 Round Threads

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- Joint Strength is a very important factor for well design

- Joint Strength of 8 round threads is lower than Pipe Body Yield (PBY)

- Larger sizes have relatively lower joint strength than PBY

Table. Joint Strength of API LTC, STC

Size Thread GradePipe Body

Yield Strength

API Joint Strength ( kips )

Joint strength/ Body Yield Fracture

StrengthPull-outStrength

4.5" x 11.6# LTC K55 183.5 211.8 179.7 0.98

7" x 26# LTC K55 415.0 541.3 401.0 0.97

9.625" x 40# LTC K55 629.6 840.7 561.2 0.89

13.375" x 61# STC K55 961.3 1,309.5 632.9 0.66

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Joint Strength of BTC Thread

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Table. Joint Strength of API BTC

Size Thread GradePipe body

Yield Strength

API Joint Strength (kips) Joint strength

/ Body YieldPinStrength

CouplingStrength

9.625" x 47# BTC L80 1,086 1,122 1,670 1.03

13.375" x 72# BTC K55 962 1,170 2,293 1.22

13.375" x 72# BTC L80 1,399 1,389 2,293 0.99

18.625" 87.5# BTC J55 1,367 1,328 3,574 0.97

Joint Strength of BTC is higher than Pipe Body Yield (PBY), but some large size such as 13-3/8” and larger have lower Joint Strength (JS) than Pipe Body Yield (PBY)

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Calculation of Joint Strength

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Most of the cases failures are Jump Out

Ajp Cross section on Pin Lastengaged thread

D Pipe OD

L Engaged thread length

Yp Yield strength

Up Ultimate Tensile strength

Round thread takes the lower value from the following equations

LTC LTC LTC LTC LTC LTC STC

OD in 4 1/2 4 1/2 7 7 9 5/8 9 5/8 13 3/8

Weight lbs/ft 11.6 11.6 26 26 47 47 61

WT in 0.25 0.25 0.36 1.36 0.47 1.47 0.43

Grade K55 L80 K55 L80 K55 L80 L80

Cplg OD in 5.000 5.000 7.875 7.875 10.625 10.625 14.375

Fracture kips 212 212 541 541 1,032 1,032 1,309

Pull-out kips 180 223 401 511 689 893 839

Yield kips 183 267 415 604 746 1,085 1,398

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Calculation of Joint Strength

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Most cases Pin thread strength is lower , but Special clearance coupling may havelower coupling strength

Buttress thread takes whichever lower value of following equations

OD in 4 1/2 4 1/2 7 7 9 5/8 9 5/8 13 3/8 13 3/8

Weight lbs/ft 11.6 11.6 26 26 47 47 68 68

WT in 0.25 0.25 0.36 1.36 0.47 1.47 0.43 0.43

Grade K55 L80 K55 L80 K55 L80 K55 L80

Cplg OD in 5.000 5.000 7.875 7.875 10.625 10.625 14.250 14.250

Fracture kips 277 291 592 641 999 1,122 1,300 1,545

Pull-out kips 409 409 1,073 1,073 1,670 1,670 2,040 2,040

Yield kips 184 267 415 604 746 1,086 1,069 1,556

Pin critical

Cplg critical

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Leak Resistance of API Connections

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b) Thread interference ・Make up distance from hand tight to power tight・Machining tolerance of thread pitch diameter

1. Too low interference→ Leakage

2. Too high interference→ High hoop stress on Cplg

or Deformation of Pin

Hand Tight

Power Tight

CouplingPin

Thread Interference

Make-up distance

Factors that affect leak resistance of thread seal connections

Dope trapped in the thread gap has quite high sealability againstfluid, but limited to gas pressure

a) Thread compound (Dope )

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Leak Resistance of API Connections

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ThreadThread form and

engagementFlank angle

(deg. )Height

(in)Pros Cons

8 Round 30/30 0.071High leakresistance

Prone to jump out

Buttress3/10 0.062

High jump outstrength

Low leak resisatnce

When pin is made up to box, thread interference induces contact pressure on the flanks of threads and dope trapped in the gap provides leak resistance against internal pressure

＜8 round thread＞Both of load and stabbing flanks contact and thread interference simply energize contact pressure on both flanks

＜Buttress thread＞Pin tooth moves in the groove of box thread and high contact pressure cannot be energized

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Hoop Stress on Coupling

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One of feature on API connection is that make up distance = thread interference is same for all sizes ( from 5" to 13.375" )

Hand tight

Power tight

Thread interference

MU Distance

Hoop Stress of API BTC

0

20,000

40,000

60,000

80,000

100,000

120,000

0.000 1.000 2.000 3.000 4.000 5.000

Dist from cplg face ( inch )

Hoo

p st

ress

( p

si )

4.5"

5.5"

7"

9.625"

13.375"

Contact Pressure of API BTC

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

0.000 1.000 2.000 3.000 4.000 5.000

Dist from cplg face ( inch )

Con

tact

Pre

ssur

e (

psi )

4.5"

5.5"

7"

9.625"

13.375"

These analysis were done with elastic model to show the difference clearly.BTC were made up to the base of triangle mark

This causes the following problems ;- Small sizes have high hoop stress - Large sizes do not have enough leak resistance

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Comparison of API v’s Premium Joint

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API connection Premium Joint

Structure Thread only Thread, Seal, Shoulder

Seal mechanism Thread and Lubricant Seal individual from thread

Application Oil ・Oil （High temp. and/or High pressure well）

・Gas

Feature ・Standard product (Commodity)

・Interchangeability even among different mill’s product

・Individual development by each mill

・No interchangeability among PJs provided by different mills

Hydraulic seal using thread compound (Limited gas sealing)

Non-streamlined internal profile

Gas tight metal-to-metal radial seal

Internal torque shoulder for controlled make-up position and low hoop stress

Negative load flank angle threads for tension > PBYS, High angle stab flank for ease of running

Streamlined internal profile, reduced turbulence, better flow

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API 8rd Connections

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API 8rd connections are made up in the field using torque measuring and hopefully torque control

Torque values for 8rd connections can be obtained from API 5C1 or from manufacturers or tong companies

API 8rd optimum torques are roughly equal to 1% of the connection joint strength

Optimum make up position for 8rd connections is to cover the “last scratch” or make up to the L4 position from API 5B (next slide). This can be accomplished by making up 3 turns past hand tight (4 ½” – 7”) or 3 ½ turns past hand tight (7 5/8” and larger except for 9 5/8” and 10 ¾” P110 grade which should be 4 turns past hand tight)

OD Weight Grade 8rd LTC Jt. Strength

Optimum Torque

5 ½ 20.00 P110 548 Kips 5470 ft-lbs7 29.00 P110 797 Kips 7970 ft-lbs

7 5/8 39.00 P110 1066 Kips 10,660 ft-lbs9 5/8 53.50 P110 1422 Kips 14,220 ft-lbs

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API 8rd Connections

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Optimum make-up position for 8rd (API 5B)

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API BTC Connections

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API BTC connections are made up in the field by position relative to the make-up triangle on the pin end, table 9 API 5B.

API RP 5C1:“4.4.1.b For buttress thread casing connections in sizes 4 1/2 through 13 3/8 OD, makeup torque values should be determined by carefully noting the torque required to make up each of several connections to the base of the triangle; then using the torque value thus established, make up the balance of the pipe of that particular weight and grade in the string.”

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API Connections

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In General, API connections are used more for surface casing, intermediate casing, and for tubing where pressures are lower.

API connections are readily available and can be repaired or get accessories machined locally/globally.

API connections are machined with wider tolerance ranges than premium joint connections so actual performances are more variable

In many cases, API connections have lower performance properties for tension and internal pressure than the pipe body

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Premium Connections

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Threaded and Coupled (T&C)Strongest in tension and Compression. Requires larger hole size, Mill make-up of couplings, Collar elevators for lifting jointsNo stress relieve

Semi-Flush (SF)Stronger in tension and compression, Requires less hole size, No couplings required, Stress relieving Required, Special running tools (lift subs)

Flush (F)Lowest in tension and Compression, Requires least hole size, No couplings Required, Stress relieving may be required, Special running tools (lift subs)

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Selection Criteria for Premium Joints

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Premium connections are normally selected based on the application and acceptable risksProduction casing and tubingProduction tubing in gas wells with high internal pressure

and or critical fluids (H2S, CO2)Metal seals provide positive gas sealingStreamlined or flush ID reduces turbulence (corrosion,

energy loss)Production casingMust act as full back to production tubing in case of

tubing failure. Connections and materials must be able to withstand tubing pressures and fluids

Casing and tubing for horizontal wellsMust be able to accommodate high bending angles (dog legs)

Risk tolerance

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Factors to Consider for Premium Joints

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•Application Tubing Intermediate casing Production casing Liner/tieback

• Well Type Exploratory or

Development• String length (weight)• Hole Clearance• Environment (sour, sweet, etc)• Special loads Torque Compression Bending

• Cost

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Parts of a Premium Joint

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Thread areaSLIGHT DAMAGE MAY BE REPAIRABLE

Metal to Metal seals NO REPAIR OR DAMAGE PERMITED

Torque shouldersSLIGHT DAMAGE MAY BE REPAIRABLE

ANY REPAIRS SHOULD ONLY BE MADE BY TRAINED SERVICE PERSONNEL

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Semi-flush Premium Joint

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Box is expanded and stress relieved

Pin is slightly swagedInternal metal seal for internal pressure only

Center torque shoulder

External metal seal for external pressure only

Two or One thread sections

Pipe body internal and external pressure ratingGood clearance Joint strength ~70% to 80%

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Flush Premium Joint

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Internal metal seal for internal pressure only

Single thread section

External metal seal for external pressure only

External torque shoulder

Pipe body internal and external pressure ratingBest clearance Joint strength ~60% to 65%

API vs. Premium Joints

8rd Buttress T&C Semi-Flush Flush

T&C YES YES YES NO NO

SEAL THREAD THREAD METAL METAL METAL

GAS TIGHT NO NO YES YES YES

TORQUE SHOULDER NO NO YES YES YES

SPECIAL CLEARANCE NO NO YES N/A N/A

INTERNAL PRESSURE PIPE BODY PIPE BODY PIPE BODY PIPE BODY PIPE BODY

EXTERNAL PRESSURE NO RATING NO RATING PIPE BODY PIPE BODY PIPE BODY

COMPRESSION RATING NO NO YES YES YES

BENDING RATING NO NO YES YES YES

HIGH TORQUE NO NO YES YES YES

CONTROLLED HOOP STRESS NO NO YES YES YES

DOPE FREE OPTION NO NO YES YES YES

TORQUE TURN RECOMMENDED NO NO YES YES YES

API Connections Premium Connections

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API vs. PREMIUM CONNECTIONS

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API 8rd API BTCFlush

PremiumSemi-flush premium

T&C Premium

Initial Cost

Gas sealing

Tension

External pressure

Bending

High Torque

Hoop stress level

Compression

Clearance

Least attractive Most attractive

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Advantages of Premium Joints

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1) Gas leak resistance ・In case of API connection (thread seal), dope trapped in the thread gap acts as sealant against liquid such as water or oil

・But, gas has much smaller molecules than liquid, and easily penetrate through trapped dope and cause leakage.

・To shut the gas pressure, metal to metal seal provided in Premium Joint is required

2) Low hoop stress due to low thread interference・Ordinary Premium Joint has thread interference half of API connection because seal function at thread is not needed

・As result, low thread interference provides low hoop stress and low risk of SSC.

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Fatigue Testing Premium Connections

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Fatigue Testing

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FATIGUE PERFORMANCE S-N CURVE (STRESS v’s Number of Cycles

The general procedure involves.

1.Make-up the samples to the specified torque.

2.Label the strain gage locations and measure the wall and outer diameter at each strain gage location.

3.Fill the sample with water and install the strain gages to monitor the fatigue strains.

4.Load the sample in the fatigue test machine.

5.Apply internal pressure.

6.Zero the strain gages.

7.Adjust the rpm of the test machine to achieve the desired strain range.

8.Cycle until the sample leaks.

9.Mark the location of the leak and remove the sample from the machine.

10.Break out the connector and MPI the pins to locate cracks.

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Fatigue Testing

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Peening causes a thin layer of the surface to be placed in uniform compression. This compressively stressed surface counteracts tensile stresses and effectively enhances fatigue life.

Enhancing Fatigue Life Through Shot Peening

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Fatigue Testing

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FATIGUE PERFORMANCE S-N CURVE (STRESS v’s Number of Cycles)

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Fatigue Testing

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Most failures occur in the imperfect threaded area of the pin connection as can be seen in the photo below.

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Fatigue Testing

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THROUGH WALL CRACK AT TONG MARKS OF PIN

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Connection Qualification Testing

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MTS Houston Texas

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History of Industry Test Protocol and JFE’s PJ

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JFETIGERTM

7”〜 9-7/8”

JFELIONTM

2-3/8”〜 14”

1984

1999

2009

2011

JFE has been providing own PJ corresponding to the latest test protocol

EXXON MOBIL (2001)Connection Evaluation Program

ISO13679: 2002Petroleum and natural gas industries – Procedures for testing casing and tubing connections

ISO13679: DIS2009

ISO13679: FDIS2011JFEBEARTM

2-3/8”〜 9-5/8”Market in 1999

Market in 2011

Market in 2012 2017

API 5C5 2017

Market in 1984

The latest connection test protocol is API 5C5 4th Edition - published in 2017

FOXTM

2-3/8”〜 13-3/8”NAM TEO/3 (1991)

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History of Industry Test Protocol and JFE’s PJ

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Chamberfor external pressure

Tension/Compression

End cap for connecting sample with Test frame Hydraulic jack for bending

PipeCoupling

Test frame

InternalPressure

ExternalPressure

Equivalent to 100% PBYS

API Collapse

Q1Q2

Q3 Q4TensionCompression

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Three Type of Test Series in ISO 13679

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Test Series A Test Series B Test Series CInternal+External PressureTension+Compression

Internal PressureTension+CompressionBend

Internal PressureTensionThermal Cycles

TensionCompression

InternalPressure

ExternalPressure

95％ VME

API Collapse

50

Each test series prescribed in ISO13679 has different combined load condition to be applied to specimens

Q1Q2

Q3 Q4

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Comparison Between ISO 13679 & API 5C5

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Test Series A (TS-A) :Tension/Compression + Internal/External Pressure

Test Series B (TS-B) :Tension/Compression + Internal Pressure + Bending

Test Series C (TS-C) :Tension + Internal Pressure + Thermal Cycle

Compression

Protocol VMEProperties in Test Series Applied tests

for each sampleCross section area

for axial loadTS‐A TS‐B TS‐C

ISO13679:2002

95% Ambient Ambient

AlmostEqual

A or B orA→C or B→C

Calculated withMin. WT

API 5C5:2017

90%/95%

Ambient&

Elevated

Ambient&

ElevatedB→C→A

Calculated withAvg. WT

→ about 5% increaseof axial load

Tension

Internal Pressure

External Pressure

Compression Tension

Internal Pressure

External Pressure

Compression Tension

Internal Pressure

External Pressure

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Comparison Between ISO 13679 & API 5C5

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Key Load Points(1) High risk of leakage with internal pressure(2) High risk of leakage with external pressure(3) High plastic deformation around seal area

ProtocolVisit number at key point Axial

LoadPressure

(1) (2) (3)

ISO13679:2002 5 3 3 Base Base

API 5C5:2017 17 6 11 Equivalent Equivalent

Size 5-1/2"×26#YS SMYS 110 ksi

AYS 110 ksiWT Specified 0.476"

Min. *) 0.452"Avg. 0.476"

< Conditions >

*) Min. WT is set as followsMin. WT = Specified WT×0.95

-20

-15

-10

-5

0

5

10

15

20

-1000 -500 0 500 1000

Inte

rnal

/Ext

erna

l P

ress

ure

[ksi

]

Axial Tensile/Compressive Load [klbf]

ISO13679：2002ISO13679：FDIS2011API 5C5：2017

(1)

(2)(3)

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JFELIONTM Test Status Chart

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

2 3 4 5 6 7 8 9 10 11 12 13 14Size(inch)

t/O.D

.

53.5#

43.5#

23.0#17.0#

26.0#

38.0# 79.3#(SC75)

85.3#(SC84)

88.2#

72#

74.2#

61.4#110.4#

6.4#9.2#

12.6#

18.9#

14.3#

68.0#

131#

57.4#(SC82)

74.6#

91.8#23.7#

JFELION Product line

100#

Completed on ISO:2002 + FDIS2011

Completed on FDIS2011

Completed on ISO:2002

Complete on ExxonMobil

20#

29#

60.7#

JFE completed the Product-line on JFELION to both ISO:2002 and FDIS2011connection test protocol in 2016

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JFE Premium Connections Lineup

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JFEBEAR™ Connection Perfromance

55 55

Connection performance

With high sealablity

Tensile Efficiency

100%

Compression Rating

80%

Internal Yield Pressure

Same as Pipe Body

Collapse pressure

Same as Pipe Body

JFEBEARTM connection rating envelope

Tension

InternalPressure

ExternalPressure

100％ VME

API Collapse

Compression Rating 80%

Tension rating 100%

Compression rating

JFEBEAR 80%

・The performance level targeted for JFEBEAR: ・ISO13679 CAL4 2002

・Compression condition : 80% rating

・The applied size of JFEBEAR:・Size : 2 3/8” 〜 9-5/8”

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JFEBEAR™ Design Features

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DESIGN ADVANTAGE

• Reduced Gap between Stabbing Flanks on the Pipe and Coupling Thread

• Superior bending capability due to hook threads

• -5° Negative Load Flank Angle on Threads

• Excellent stabbing performance due to high stabbing flank angle

• 25° Angle for Thread Stabbing Flank

• High compression rating and galling resistance due to optimum gap between pin and box stabbing flanks

• Contour metal to metal seal between Pin and Coupling

• Galling resistance due to point seal type

3°

15°

Thread form

25°

-5°

3°3°Seal geometry

2 3/8”, 2 7/8” 8TPI3 ½”, 4” 6TPI4 ½” and above 5 TPITaper 1:16

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JFETIGER™

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JFE Premium Connections Lineup

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・The performance level targeted for JFETIGER: ・ISO13679 CAL4 2002 and DIS2009・Compression condition : 95% rating

・The applied size of JFETIGER :・Size : 7”〜9-7/8”



Tensile Efficiency

100%

Compression Rating

95%


Same as Pipe Body

Collapse pressure

Same as Pipe BodyJFETIGERTM connection rating envelope

Tension

InternalPressure

ExternalPressure

100％ VME

API Collapse

Compression Rating 95%

Tension rating 100%Compression rating

JFEBEAR 80%

JFETIGER 95%

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JFETIGER™ Design Features

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DESIGN ADVANTAGE

• Reduced Gap between Stabbing Flanks on the Pipe and Coupling Thread

• High Compression Rating of 95% Test Load Envelope

• Negative Load Flank Angle on Threads

• Gas Tight Sealing under Bending Load

• 25° Angle for Thread Stabbing Flank

• Quick Make Up

• Radial Metal to MetalSeal between Pin andCoupling

• Tight Seal Systemagainst Pressure

Thread form

Seal geometry

17°

25°

-5°

3°• Excellently Improved

Plating Technology• Highly Accomplished

Anti-Galling Performance

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JFELION™

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JFELION™ Connection Performance

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TensionCompression

InternalPressure

ExternalPressure

100％ VME

API Collapse

・The performance level targeted for JFELION:・ISO13679 CAL4 2002, FDIS2011 and API 5C5 ・Compression condition : 100% rating

・The applied size of JFELION :・Size : 2-3/8”〜14”



Tensile Efficiency

100%

Compression Rating

100%


Same as Pipe Body

Collapse pressure

Same as Pipe Body

CompressionRating 100%

JFEBEAR 80%

JFETIGER 95%

JFELION 100%

Compression rating

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JFELION™ Connection Performance

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DESIGN ADVANTAGE

Thread form

Seal geometry

10°(CSG)

15°

-5°

4.7°(CSG)

Negative Load FlankAngle on Threads

Perpendicular StabbingFlank Angle on Thread

and Shoulder Angle

Superior Sealabilityunder Bending Load

High CompressionResistance

Optimized ContactPressure Distribution

on Seal Area byComplex Formed Seal

Excellently ImprovedPlating Technology

Stable Sealabilityagainst Axial Movement

Extremely LoweredAnti-Galling Tendency

Co

nta

ctP

ress

ure

JFELION OptimizedContact Pressure

Conventional

Widely Contacted Area→ Stable Sealbility

Gal

lin

g T

end

ency

Lo

wH

igh

Decreasing Peak Pressure→ Lower Galling Tendency

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JFELION™ HW

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JFELION™ HW Design Features

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Thread form

Seal geometry

4.7°

15°

-2°

10°

3.0

°

ADVANTAGE

• Negative Load Flank Angle on Threads ・Superior Seal-ability

under bending load• 15°Angle for Thread

Stabbing Flank ・High Compressionresistance

• Radial metal to metal seal between Pin and Coupling

• Multi Radii Seal shape

・ Superior Seal-ability with Ideal contact pressure distribution

・Tight seal system for large OD and HighGrade

・Specifically designed for heavy wall casing

• Thread crests and roots parallel to pipe axis

• Thread taper based on pipe thickness (1:6, 1:8)

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Selection Guidance JFELION™ HW

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JFE will recommend appropriate JFELION HW according to the requirement of casing design and external pressure from customers

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

2 3 4 5 6 7 8 9 10 11 12 13 14

Size OD, inch

t/D

Standard JFELION Product-line (1/16 Thread Taper)

JFELION HW8

JFELION HW6

■ : LION HW6◆ : LION HW8

This selection guidance is information purpose only, please contact JFETC JFE connection design will be optimized due to the casing and application requirements

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JFE Premium Joints Overview

6666

Design and Concept TargetComp.Rating

ISO13679(FDIS2011)CAL IV

100%

ISO13679(DIS2009)CAL IV

95%

2‐3/8”〜9‐5/8”

ISO13679latest(2002)

≦7": CAL IV9 5/8":CAL II

80%

2 3/8" ~ 14"

7" ~ 10"

25deg

Easy StabbingNegative Angle

-5degPoint Seal

17deg

Long Seal Area

Easy StabbingNegative Angle

15deg

Negative Angle

Good Stabbing and High Compression Performance

Radial Seal

10deg

High CompressionPerformance

Long Seal Area

Radial Seal

Ro

bu

st S

eal D

esig

n a

gai

nst

Co

mp

ress

ive

Def

orm

atio

n

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67

Clear-Run™ Technology

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CLEAR-RUNTM

High Anti-Corrosion&

Anti-Galling PerformancePlating Technology

+ =

Environment Friendly &

Clean Compound Technology

Advanced 'Dope-Free'&

High PerformanceTubular System

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CLEAR-RUNTM

Conventional API Dope CLEAR-RUNTM

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Feature / Advantage of CLEAR-RUNTM

FEATURE ADVANTAGE

Low Usage Amount

Clear Appearance

Free from Formation & Contamination on Well-Bore

Enable to Inspect w/o Removing Compound

→ Accomplish Highly Efficient RunningApplicable for

Storage and Make Up &

Supplied "Make-Up State"

Environmentally FriendlyYellow Rated Compound

Reduce Manual HandlingSignificantly

→ Achieve High Performanceand Safer Running

Greatly Reduce the Risk of Residual Environment Impact

Free from Slip Hazard &Enable Safer Work Space

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JFE premium joints with CLEAR-RUN:

Benefit for our customer

No thread compound to pollute well or environmentRig ready – no need to clean and re-dopeExcellent make-up characteristicsSafe working environmentOne solution for storage and runningCan inspect connections without cleaningIncrease torque capacity vs. API mod

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www.jfetc.com

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www.jfetc.com

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CDS Generator

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CDS Generator

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Connection Data Sheet

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Material Yield Strength

Connection Dimensions

Pipe Dimensions and Performances

Connection Performances

Field Make-up Torque

Selected Bevel is displayed

Colour code for selected grade

Example torque turn graph

Size, weight, grade, coupling type and FF

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www.jfetc.com

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Technical Documents

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Technical Documents

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Field Service Handbook

80

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Technical Documents

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Thank you for your attention