Drill Collars

7/30/2019 Drill Collars

1/13

DRILL Collars

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2/13

Grant Prideco. All rights reserved. December 2003

Traceability

Drill collar material and process

traceability are maintained from

receipt of mill certified raw materi-

al to completion of all the manu-

facturing. Serial numbers are die

stamped on bar bodies.

Rigid Inspection Procedures

We inspect all our drill collars to

comply with API standards and

our own internal specifications.

These inspections include visual

dimensional checks as well as

ultrasonic inspections over the

entire body of the drill collar.

drill collars are manufactured from AISI

4142H-4145H modified steel, and are

supplied in the as rolled surface fin-

ish condition. Alternative surface finishes can be

provided. Drill collars are trepanned and drifted

to API Spec. 7 Latest Edition. Full-length heat-

treatment processes ensure that mechanical

properties meet or exceed API Spec. 7 Latest

Edition requirements.

A hardness range of285-341, Brinell

Hardness and Charpy V notch minimum

impact strength of40 ft-lb at 700F are guaran-

teed one inch below the surface.

tsl pps m by ss yll sp-

ms fmg h qums f h u aStM a370,

0.2% ffs mh. Hss ss pfm h od f ll

ll lls mpl wh u aStM ss.

Mls Mhl Pps

dll cll Mmum Mmum Mmumdm Yl Sgh tsl Sgh Hss

. ps ps BHn

3 1/8 thru 6 7/8 110,000 140,000 285

7 thru 11 100,000 135,000 285

MATERIALS

d r i L L c o L L a r S


3/13

98

API Connections

Grant Prideco drill collars are manufactured in30-ft and 31-ft lengths. All API connections

comply with dimensional requirements speci-

fied in API Spec. 7 Latest Edition and guidelines pre-

sented in API RP7G Latest Edition. Common sizes

and styles are summarized on the next page. In

addition, other connections such as OH, FH, PAC,

WO, SLH90, SH, and H90, are available to meet spe-

cific needs.

Phosphate Coating

All connections are phosphate-coated to improve

resistance to galling.

cl rllg

Drill collar thread roots, as well as elevator recessupper radii, are cold-rolled. Cold rolling creates a

compressive recess upper radii stress condition that

increases fatigue life by minimizing crack initiation.

th l-llg pss sss f m-

pssg ml fbs by ms f ll.

Stress Relief Features (SRF)Pin stress relief groove and API boreback box

API pin stress relief groove and API boreback box decrease the frequency of fatigue

failures. These features increase connection flexibility and reduce high-stress con-centrations that normally occur adjacent to the end of engaged threads. Stress

relief features are machined in compliance with API Spec. 7 Latest Edition.

As indicated in API Spec. 7 Latest Edition, connections NC23, NC26 (2 3/8 IF) and

NC31 (2 7/8 IF) do not have sufficient metal to accommodate stress relief features.

SrttM

Sss rlf th Fm

Grant Pridecos patented SRTTM modified

thread form can be applied to BHA connec-tions to reduce stress in the thread roots and

significantly improve connection fatigue life.

The stress reduction is accomplished by

machining an enlarged radius into the root

of the stab-flank thread. The SRTTM thread form

provides a larger reduction in stress level and

longer connection fatigue life than either the

API box stress relief groove or the boreback box feature.

aPi p sss lf gv

aPi bbk bx mv u-

gg hs hghly sss

s f h ll ll -

.


The enlarged root radius of the modi-

fied thread form reduces the stress

concentration at the thread root.

elg thr rus

aPi th Fm

G r a n t P r i d e c o

product specifications


4/13

Drill collars are manufactured in compliance

with the following API standards:

aPi Spf 7 Ls e

aPi rmm P 7G Ls e

aPi Spf Q1 Ls e

dll cll dll cll B appxm S dsplm typl Bgnumb dm Lgh Wgh Mulus (p ) Sgh

(1) r

. . f lb/f. ( .3) US gl/f

NC 23-31 3 1/8 1 1/4 30 22.00 2.919 0.337 2.57:1

NC 26-35 (2 3/8 IF) 3 1/2 1 1/2 30 26.70 4.067 0.408 2.42:1

NC 31-41 (2 7/8 IF) 4 1/8 2 30 or 31 33.65 6.510 0.515 2.43:1

NC 35-47 4 3/4 2 30 or 31 46.81 10.191 0.716 2.58:1

NC 38-50 (3 1/2 IF) 5 2 1/4 30 or 31 53.29 11.769 0.815 2.38:1

NC 44-60 6 2 1/4 30 or 31 82.61 20.786 1.264 2.49:1

NC 44-60 6 2 13/16 30 or 31 75.90 20.182 1.161 2.84:1

NC 44-62 6 1/4 2 1/4 30 or 31 90.52 23.566 1.385 2.91:1

NC 46-62 (4 IF) 6 1/4 2 13/16 30 or 31 83.81 22.986 1.282 2.63:1

NC 46-65 (4 IF) 6 1/2 2 1/4 30 or 31 99.52 26.574 1.522 2.76:1

NC 46-65 (4 IF) 6 1/2 2 13/16 30 or 31 92.81 26.016 1.420 3.05:1

NC 46-67 (4 IF) 6 3/4 2 1/4 30 or 31 108.52 29.821 1.600 3.18:1

NC 50-70 (4 1/2 IF) 7 2 1/4 30 or 31 117.52 33.315 1.798 2.54:1

NC 50-70 (4 1/2 IF) 7 2 13/16 30 or 31 110.77 32.796 1.694 2.73:1

NC 50-72 (4 1/2 IF) 7 1/4 2 13/16 30 or 31 119.81 36.565 1.833 3.12:1

NC 56-77 73

/4 213

/16 30 or 31 139.90 44.906 2.140 2.70:1NC 56-80 8 2 13/16 30 or 31 150.81 49.498 2.307 3.02:1

6 5/8 API Reg 8 1/4 2 13/16 30 or 31 161.81 54.382 2.472 2.93:1

NC 61-90 9 2 13/16 30 or 31 195.81 70.887 2.995 3.17:1

7 5/8 API Reg 9 1/2 3 30 or 31 217.00 83.336 3.319 2.81:1

NC 70-97 9 3/4 3 30 or 31 230.00 90.179 3.518 2.57:1

NC 70-100 10 3 30 or 31 242.97 97.380 3.717 2.81:1

8 5/8 API Reg 11 3 30 or 31 299.00 129.948 4.574 2.84:1

n:(1) th umb (nc) s aPi wh h V- .065 h fm wh V- .038r h us. th

fs w gs h ph m f h h h ls w gs h us m f h ll ll.

dll cll d

+ 1/16-0

Summy f c Fea rsuls

Sss isy Ls egg Bx th r

(ps)

Ml dsp 10 deg/100 ft 20 deg/100ft

S Bx 171,734 240,087

aPi Sss rlf Gv Bx 160,528 220,717

aPi Bbk Bx 165,394 226,047

Mf th Fm 142,441 196,487

SRTTM

Stress Relief Thread Form

(Cont.)In addition to providing increased connection

fatigue life, SRTTM boxes reduce the overall

length required for recut by more than one

inch when compared to boxes with API stress

relief features.

API SPECIFICATIONS



5/13

100 Grant Prideco. All rights reserved. December 2003

Grant Prideco offers optional slip and elevator

recesses to improve handling efficiency and safe-

ty. The upper radius of the elevator recess is cold-

rolled to increase product life. Slip and elevator recesses

can be used together or separately. Unless otherwise

specified, slip and elevator recesses are machined in

compliance with API RP7G Latest Edition guidelines.

3

r

cl Wk

Shul a

1

rus

Shul a

a

B

2

rus

c

2

rus3

3

16

18

20

c

B

a


SLIP AND ELEVATOR RECESSES


6/13

dll cll elv Slp elvdm rss rss rss

dm dm rus

a B c r

. . . .

41/8 3

11/16 3

3/4

1/8

43/4 4

1/4 4

3/8

1/8

5 41/2 4

5/8

1/8

6 53

/8 51

/21

/8

61/4 5

5/8 5

3/4

1/8

61/2 5

7/8 6

1/8

63/4 6 6

1/4

3/16

7 61/4 6

1/2

3/16

71/4 6

1/2 6 3/4

3/16

73/4 7 7

1/4

3/16

8 71/4 7

1/2

3/16

81/4 7

1/2 7 3/4

3/16

9 81/8 8

1/2

1/4

91/2 8

5/8 9

1/4

93/4 8

7/8 9

1/4

1/4

10 91/8 9

1/2

1/4

11 101/8 10

1/2

1/4

Slp elv rsss

While every effort has been made to insure the accuracy of the tables herein, this material is presented as a reference guide only. The technical informationcontained herein should not be construed as a recommendation. Grant Prideco cannot assume responsibility for the results obtained through the use of thismaterial. No expressed or implied warranty is intended.




7/13

102

Grant Prideco Offers Numerous Hardfacing

Options:

SMOOTHX

SuperSmoothX

Ganpdc1000SerieStmhadfacng

oh

Bx e whSlp rss oly

Grant Pridecos patented hardfacing that provides a smooth sur-

face with little or no exposed carbide.

Grant Pridecos patented solution for applications requiring a

machine-finished surface.

Fine Particle Tungsten-Carbide, applied either flush or raised,

provides economical protection in open hole applications.

Grant Prideco offers custom engineering hardfacing for specific

applications.

P eBx e wh

Slp elv rss

11

1

10

30 M.

101

1

10

4


HARDFACING


8/13

High Torque Applications

Grant Prideco Double Shouldered

connections (HT, XT, GPDS) are

patented, high-performance con-

nections that offers significantly more tor-

sional strength than standard API connec-

tions of similar size.

Spiral Drill Collars

Spiral drill collars are part of

Grant Pridecos complete product

line. Spiral grooves let mud cir-

culate freely around the drill collar to

equalize pressure and prevent a seal

from forming. This reduces the occur-

rence of differential pressure sticking.

Spl pvs f fl skg Whu Spl


DOUBLE SHOULDERED CONNECTIONS



9/13

104

Sz typ dll cll B (.)

f c od 1 1 1/4 11/2 1

3/4 2 21/4 2

1/2 213/16

. f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr f -lb BSr f-lb BSr

3 2,500 2.03 2,500 2.17 2,500 2.49

aPi nc 23 3 1/8 3,300 2.40 3,300 2.57 2,600 2.94

3 1/4 4,000 2.81 3,400 3.00 2,600 3.43 3 2,200 2.36 2,200 2.70 1,700 3.53

2 3/8 rgul 31/8 3,000 2.75 2,600 3.14 1,700 4.10

3 1/4 3,300 3.17 2,600 3.62 1,700 4.72

3 3,800 1.78 3,800 2.01 2,900 2.53

2 7/8 Pac 31/8 5,000 2.15 4,200 2.43 2,900 3.07

(S n 6) 3 1/4 5,200 2.55 4,200 2.88 2,900 3.63

2 3/8 IF

aPi nc 26 3 1/2 4,600 2.25 4,600 2.42 3,700 2.76

2 7/8 Slm Hl 33/4 5,500 2.96 4,700 3.18 3,700 3.64

3 1/2 3,800 2.27 3,800 2.42 3,800 2.73

2 7/8 rgul 33/4 5,800 2.91 5,000 3.10 4,000 3.49

3 7/8 5,800 3.26 5,000 3.48 4,000 3.91

2 7/8 XH 33/4 4,100 1.53 4,100 1.58 4,100 1.68

3 1/2 dbl Sml 37/8 5,400 1.76 5,400 1.82 5,400 1.93

2 7/8 M. op 41/8 8,100 2.26 8,100 2.34 7,400 2.48

3 7/8 4,600 1.54 4,600 1.59 4,600 1.69 4,600 1.85 4,600 2.16

2 7/8 iF 41/8 7,400 2.03 7,400 2.10 7,400 2.22 6,900 2.44 5,400 2.84

nc 31 4 1/4 8,900 2.29 8,900 2.37 8,200 2.51 6,900 2.75 5,400 3.21

3 1/2 Slm Hl 41/2 10,300 2.86 9,300 2.95 8,200 3.13 6,900 3.43 5,400 4.01

4 1/8

6,500 2.09 6,500 2.16 6,500 2.27 6,500 2.48 5,700 2.85

3 1/2 rgul 41/4 7,900 2.34 7,900 2.41 7,900 2.54 7,100 2.77 5,700 3.18

4 1/2 10,500 2.86 9,500 2.95 8,400 3.11 7,100 3.39 5,700 3.90

4 1/2 9,000 1.95 9,000 2.07 9,000 2.26 7,400 2.59

nc 35 4 3/4 12,300 2.44 10,800 2.58 9,200 2.82 7,400 3.24

5 12,300 2.97 10,800 3.14 9,200 3.43 7,400 3.95

4 1/4 5,200 1.31 5,200 1.37 5,200 1.48 5,200 1.68

3 1/2 XH 41/2 8,500 1.71 8,500 1.80 8,500 1.95 8,300 2.20

4 Slm Hl 4 3/4 12,100 2.16 11,800 2.27 10,100 2.46 8,300 2.77

3 1/2 M. op 5 13,300 2.65 11,800 2.79 10,100 3.01 8,300 3.40

51/4 13,300 3.18 11,800 3.35 10,100 3.62 8,300 4.08

4 3/4 10,000 1.73 10,000 1.80 10,000 1.92 10,000 2.10 8,300 2.54

3 1/2 iF 5 13,900 2.15 14,000 2.24 12,900 2.38 11,000 2.61 8,300 3.15

nc 38 5

1

/4 16,200 2.61 14,500 2.71 12,900 2.88 11,000 3.17 8,300 2.824 1/2 Slm Hl 5

1/2 16,200 3.10 14,500 3.23 12,900 3.43 11,000 3.77 8,300 4.54

ns: (aPi, rP7G Ls e)1. Basis of calculations for recommended make-up torque assumed the use of a thread compound containing 40% to 60% by weight of finely pow-

dered metallic zinc, or 60% by weight of finely powdered metallic lead, with no more than 0.3% total active sulfur (reference the caution regard-ing the use of hazardous materials in API Spec. 7 Latest Edition), applied thoroughly to all threads and shoulders. Also, the modified screw jackformula was used, as shown in the IADC Drilling Manual and the API Spec. RP7G Latest Edition and a unit stress of 62,500 psi in the box or pin,whichever is weaker. Torque values are rounded to the nearest 100 ft-lb.

2. Normal torque range is calculated value plus 10%. Higher torque values may be used under extreme condit ions.3. In each connection size and type group torque values apply to all connection types in the group, when used with the same dril l collar OD and bore

i.e. 2 3/8 API IF, API NC26 and 2 7/8 Slim Hole connections, used with 3 1/2 x 1 1/4 drill collars, all have the same minimum make-up torque of4600 ft-lbs and the box is the weaker member.

4. Stress-relief features are disregarded for make up torque calculation.5. H-90 connection make-up torque is based on 56,200 psi stress and other factors, as listed in note 1.6. 2 7/8 PAC make-up torque is based on 87,500 psi stress and other factors, as listed in note 1.7. Torque figures in bold indicate that the weaker member for the corresponding outside diameter and bore is the box. For all other torque values, the

weaker member is the pin.

f-lb (S n 2)


Drill Collars Recommended Make-Up Torque and Bending Strength Ratios


10/13

f-lb (S n 2)


f c od 1 3/4 2 21/4 2

1/2 213/16 3 3

1/4. f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr

4 3/4 8,800 1.46 8,800 1.51 8,800 1.59 8,800 1.71 8,800 1.99

3 1/2 H-90 5 12,800 1.83 12,800 1.89 12,800 1.99 12,800 2.15 10,400 2.49

(S n 5) 5 1/4 17,100 2.23 16,900 2.31 15,100 2.43 13,200 2.43 10,400 3.04

5 1/2 18,500 2.67 16,900 2.76 15,100 2.91 13,200 3.14 10,400 3.64

5 10,900 1.61 10,900 1.66 10,900 1.74 10,900 1.86 10,900 2.11

4 Full Hl 5 1/4 15,300 1.98 15,300 2.04 15,300 2.14 15,000 2.29 12,100 2.60

nc 40 5 1/2 20,000 2.38 18,900 2.46 17,000 2.57 15,000 2.75 12,100 3.12

4 M. op 5 3/4 20,500 2.62 18,900 2.91 17,000 3.04 15,000 3.25 12,100 3.70

4 1/2 dbl. Sml 6 20,500 3.29 18,900 3.39 17,000 3.55 15,000 3.79 12,100 4.31

5 1/4 12,600 1.47 12,600 1.51 12,600 1.56 12,600 1.64 12,600 1.80

51

/2 17,400 1.80 17,400 1.85 17,400 1.91 17,400 2.01 16,500 2.20 4 H-90 5 3/4 22,500 2.17 22,500 2.22 21,700 2.29 19,500 2.41 16,500 2.84

(S n 3) 6 25,400 2.55 23,700 2.61 21,700 2.70 19,500 2.84 16,500 3.12

6 1/4 25,400 2.97 23,700 3.04 21,700 3.15 19,500 3.31 16,500 3.63

5 1/2 15,600 1.89 15,600 1.94 15,600 2.00 15,600 2.10 15,600 2.30

4 1/2 aPi rgul 53/4 20,600 2.24 20,600 2.29 20,600 2.37 19,600 2.49 16,600 2.72

6 25,400 2.62 23,700 2.65 21,700 2.77 19,600 2.91 16,600 3.18

6 1/4 25,400 3.02 23,700 3.09 21,700 3.20 19,600 3.35 16,600 3.67

5 3/4 20,900 1.99 20,900 2.04 20,900 2.10 20,900 2.20 18,200 2.39

nc 44 6 26,500 2.36 25,500 2.41 23,500 2.49 21,300 2.61 18,200 2.84

6 1/4 27,300 2.76 25,500 2.82 23,500 2.91 21,300 3.04 18,200 3.31

6 1/2 27,300 3.19 25,500 3.25 23,500 3.36 21,300 3.51 18,200 3.82

5 1/2 13,000 1.60 13,000 1.85 13,000 1.71 13,000 1.85 13,000 1.93

5 3/4 18,100 1.92 18,100 1.97 18,100 2.06 18,100 2.22 17,900 2.36

4 1/2 FH 6 23,600 2.28 23,600 2.33 23,000 2.42 19,900 2.81 17,900 2.766 1/4 27,300 2.64 25,300 2.71 23,000 2.82 19,900 3.04 17,900 3.24

6 1/2 27,300 3.03 25,300 3.12 23,000 3.25 19,900 3.50 17,900 3.73

4 1/2 XH 53/4 17,700 1.68 17,700 1.74 17,700 1.87 17,700 1.97

nc 46 6 23,400 2.02 23,400 2.09 22,400 2.24 20,300 2.37

4 iF 6 1/4 28,000 2.38 25,700 2.47 22,400 2.64 20,300 2.79

5 dbl. Sml 6 1/2 28,000 2.77 25,700 2.87 22,400 3.07 20,300 3.25

4 1/2 M. op 63/4 28,000 3.18 25,700 3.30 22,400 3.57 20,300 3.74

5 3/4 18,000 1.83 18,000 1.69 18,000 1.80 18,000 1.90

6 23,700 1.95 23,700 2.02 23,200 2.16 21,100 2.28

4 1/2 H-90 61/4 28,700 2.30 26,400 2.38 23,200 2.54 21,100 2.69

(S n 5) 6 1/2 28,700 2.88 26,400 2.77 23,200 2.96 21,100 3.12

6 3/4 28,700 3.08 26,400 3.19 23,200 3.40 21,100 3.59

6 1/4 25,400 1.80 25,400 1.85 25,400 1.95 25,400 2.03 24,000 2.18

5 H-90 6 1/2 31,900 2.12 31,900 2.17 29,400 2.29 27,200 2.38 24,000 2.56

(S n 5) 6 3/4 35,300 2.45 32,900 2.52 29,400 2.65 27,200 2.76 24,000 2.97

4. In each connection size and type, group torque values apply to all connect ion types in the group when used with same dril l collar OD and bore;i.e., 2 3/8 IF, API NC26 and 2 7/8 Slim Hole connections,used with 3 1/2 x 1 1/4 drill collars, all have the same minimum make-up torque of 4600 ft-lb and the box is the weaker member.

5. Stress-relief features are disregarded for make-up torque calculation.6. H-90 connection make-up torque is based on 56,200 psi stress and other factors, as listed in note 1.7. 2 7/8 PAC make-up torque is based on 87,500 psi stress and other factors, as listed in note 1.8. Conventional recommended BSR tanges do not apply to Double-Shouldered connection (HT, XT, GPDS) designs. Current industry target BSR

ranges should not be used as an indicator of Double-Shouldered acceptance/rejection.9. Torque figures in bold indicate that the weaker member for the corresponding OD and bore is the box. For all other torque values, the weaker

member is the pin.




11/13

106


f c od 2 1/4 21/2 2

13/16 3 31/4 3

1/2 33/4

. f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr lb/f BSr

6 1/4 23,000 1.59 23,000 1.63 23,000 1.71 23,000 1.77 23,000 1.89

4 1/2 iF 61/2 29,700 1.89 29,700 1.93 29,700 2.03 29,700 2.10 26,700 2.24

aPi nc 50 6 3/4 36,700 2.21 35,800 2.26 32,300 2.37 30,000 2.46 26,700 2.62

5 XH 7 38,400 2.54 35,800 2.61 32,300 2.73 30,000 2.83 26,700 3.02

5 M. op 7 1/4 38,400 2.91 35,800 2.98 32,300 3.12 30,000 3.24 26,700 3.45

5 1/2 dbl. Sml 71/2 38,400 3.29 35,800 3.38 32,300 3.53 30,000 3.17 26,700 3.91

6 3/4 34,500 1.94 34,500 1.98 34,500 2.06 34,100 2.13 30,800 2.25

5 1/2 H-90 7 42,000 2.25 40,100 2.30 36,500 2.39 34,100 2.46 30,800 2.60

(S n 5) 7 1/4 42,700 2.57 40,100 2.63 36,500 2.73 34,100 2.82 30,800 2.98

7 1/2 42,700 2.92 40,100 2.98 36,500 3.10 34,100 3.20 30,800 3.38

6 3/4 31,900 2.07 31,900 2.11 31,900 2.20 31,900 2.72 30,500 2.40

5 1/2 aPi rgul 7 39,400 2.37 39,400 2.42 36,200 2.52 33,900 2.60 30,500 2.75

7 1/4 42,500 2.70 39,900 2.76 36,200 2.87 33,900 2.96 30,500 3.13

7 1/2 42,500 3.04 39,900 3.11 36,200 3.23 33,900 3.34 30,500 3.53

7 32,800 1.64 32,800 1.67 32,800 1.72 32,800 1.76 32,800 1.83

5 1/2 aPi FH 71/4 41,000 1.91 41,000 1.95 41,000 2.00 41,000 2.05 41,000 2.14

7 1/2 49,700 2.20 49,700 2.24 47,800 2.30 45,200 2.36 41,500 2.45

7 3/4 54,500 2.50 51,700 2.54 47,800 2.62 45,200 2.68 41,500 2.79

7 1/4 40,500 2.05 40,500 2.11 40,500 2.16 40,500 2.24

nc 56 7 1/2 50,000 2.33 48,200 2.39 45,600 2.45 42,100 2.55

7 3/4 52,100 2.62 48,200 2.70 45,600 2.76 42,100 2.87

8 52,100 2.94 48,200 3.02 45,600 3.09 42,100 3.21

7 1/2 46,400 1.96 46,400 2.01 46,400 2.05 46,400 2.12

6 5/8 aPi rgul 7 3/4 55,600 2.24 53,300 2.30 50,700 2.35 46,900 2.438 57,400 2.54 53,300 2.60 50,700 2.66 46,900 2.75

8 1/4 57,400 2.85 53,300 2.93 50,700 2.99 46,900 3.10

7 1/2 46,500 1.84 46,500 1.89 46,500 1.92 46,500 1.99

6 5/8 H-90 73/4 55,700 2.11 55,700 2.16 53,600 2.20 49,900 2.27

(S n 5) 8 60,300 2.39 56,300 2.45 53,600 2.49 49,900 2.58

8 1/4 60,300 2.69 56,300 2.75 53,600 2.80 49,900 2.90

8 55,100 2.03 55,100 2.07 55,100 2.10 55,100 2.16

8 1/4 65,400 2.28 65,400 2.32 65,400 2.36 61,600 2.42

nc 61 8 1/2 72,700 2.54 68,400 2.59 65,600 2.63 61,600 2.70

8 3/4 72,700 2.82 68,400 2.87 65,600 2.92 61,600 2.99

9 72,700 3.11 68,400 3.17 65,600 3.22 61,600 3.30

8 56,600 1.82 56,600 1.85 56,600 1.88 56,600 1.93 56,600 1.99

8 1/4

67,100 2.07 67,100 2.11 67,100 2.14 63,400 2.19 59,000 2.26

5 1/2 iF 81/2 74,600 2.33 70,300 2.37 67,400 2.41 63,400 2.47 59,000 2.55

8 3/4 74,600 2.60 70,300 2.65 67,400 2.69 63,400 2.76 59,000 2.85

9 74,600 2.89 70,300 2.95 67,400 2.99 63,400 3.06 59,000 3.16

9 1/4 74,600 3.20 70,300 3.26 67,400 3.30 63,400 3.39 59,000 3.50

8 1/2 67,800 1.88 67,800 1.91 67,800 1.93 67,800 1.97 67,800 2.02 67,200 2.09

8 3/4 79,500 2.12 79,500 2.15 79,500 2.18 76,700 2.23 72,100 2.28 67,200 2.36

6 5/8 FH 9 88,600 2.30 84,000 2.41 81,000 2.44 76,700 2.49 72,100 2.56 67,200 2.64

9 1/4 88,600 2.64 84,000 2.68 81,000 2.72 76,700 2.77 72,100 2.85 67,200 2.94

9 1/2 88,600 2.92 84,000 2.97 81,000 3.00 76,700 3.07 72,100 3.15 67,200 3.25

f-lb (S n 2)





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f c od 2 1/2 213/16 3 3

1/4 31/2 3

3/4. f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr f-lb BSr

9 75,800 1.87 75,800 1.89 75,800 1.91 75,800 1.93 75,800 1.97 75,800 2.02 9 1/4 88,800 2.08 88,800 2.10 88,800 2.12 88,800 2.15 88,800 2.19 88,800 2.24

nc 70 9 1/2 102,400 2.29 102,400 2.32 102,400 2.34 101,100 2.37 96,200 2.41 91,000 2.47

9 3/4 113,700 2.52 108,800 2.55 105,700 2.57 101,100 2.60 96,200 2.65 91,000 2.71

10 113,700 2.76 108,800 2.79 105,700 2.81 101,100 2.85 96,200 2.90 91,000 2.97

10 1/4 113,700 3.01 108,800 3.04 105,700 3.06 101,100 3.11 96,200 3.17 91,000 3.24

10 108,200 1.94 108,200 1.95 108,200 1.96 108,200 1.98 108,200 2.01 108,200 2.04

10 1/4 124,100 2.13 124,100 2.14 124,100 2.16 124,100 2.10 124,100 2.20 124,100 2.24

nc 77 10 1/2 140,500 2.33 140,500 2.34 140,500 2.36 140,500 2.38 135,100 2.41 129,400 2.44

10 3/4 154,300 2.53 149,000 2.55 145,500 2.56 140,500 2.59 135,100 2.62 129,400 2.66

11 154,300 2.75 149,000 2.77 145,500 2.78 140,500 2.81 135,100 2.84 129,400 2.89

8 53,500 1.90 53,500 1.94 53,500 1.96 53,500 2.01 53,500 2.07 53,500 2.16

7 H-90 8 1/4 63,700 2.14 63,700 2.18 63,700 2.21 63,700 2.26 61,000 2.33 56,400 2.42

(S n 5) 8 1/2 74,500 2.39 72,100 2.43 69,300 2.46 65,300 2.52 61,000 2.60 56,400 2.70

8 1/2 60,400 1.80 60,400 1.83 60,400 1.84 60,400 1.88 60,400 1.92 60,400 1.98

8 3/4 72,200 2.02 72,200 2.05 72,200 2.07 72,200 2.11 72,200 2.16 72,200 2.22

7 5/8 aPi rgul 9 84,400 2.25 84,400 2.28 84,400 2.31 84,200 2.35 79,500 2.40 74,500 2.47

9 1/4 96,300 2.49 91,600 2.53 88,600 2.55 84,200 2.60 79,500 2.66 74,500 2.74

9 1/2 96,300 2.75 91,600 2.78 88,600 2.81 84,200 2.87 79,500 2.93 74,500 3.02

9 73,000 1.76 73,000 1.78 73,000 1.79 73,000 1.81 73,000 1.84 73,000 1.88

7 5/8 H-90 91/4 86,000 1.95 86,000 1.97 86,000 1.99 86,000 2.02 86,000 2.05 86,000 2.09

(S n 5) 9 1/2

99,500 2.16 99,500 2.18 99,500 2.20 99,500 2.23 99,500 2.27 96,300 2.31

10 109,300 1.96 109,300 1.97 109,300 1.98 109,300 2.00 109,300 2.03 109,300 2.06

8 5/8 aPi rgul 101/4 125,300 2.15 125,300 2.17 125,300 2.18 125,300 2.21 125,300 2.24 125,000 2.27

10 1/2 141,800 2.36 141,800 2.38 141,100 2.39 136,100 2.42 130,800 2.45 125,000 2.49

10 1/4 113,500 1.83 113,500 1.84 113,500 1.85 113,500 1.87 113,500 1.89 113,500 1.91

8 5/8 H-90 (S n 5) 101/2 130,100 2.01 130,100 2.02 130,100 2.03 130,100 2.05 130,100 2.07 130,100 1.09

8 3/4 68,100 2.70 68,100 2.73 67,300 2.80 62,800 2.88 58,100 3.00

7 H-90 (S n 5) 9 74,200 2.98 71,400 3.02 67,300 3.09 62,800 3.19 58,100 3.31

9 1/4 73,100 2.54 73,100 2.56 73,100 2.61 73,100 2.67 73,100 2.75

7 5/8 aPi rgul 91/2 86,500 2.79 86,500 2.82 86,500 2.87 82,500 2.94 77,300 3.03

9 3/4 94,900 3.06 91,800 3.10 87,300 3.15 82,500 3.23 77,300 3.32

10 94,900 3.35 91,800 3.38 87,300 3.44 82,500 3.52 77,300 3.63

9 3/

491,700 2.40 91,700 2.42 91,700 2.45 91,700 2.49 91,700 2.55

7 5/8 H-90 10 106,300 2.63 106,300 2.65 106,300 2.68 104,200 2.73 98,800 2.79

(S n 5) 10 1/4 117,100 2.87 113,900 2.89 109,200 2.93 104,200 2.98 98,800 3.04

10 1/2 117,100 3.12 113,900 3.14 109,200 3.18 104,200 3.24 98,800 3.31

10 3/4 112,900 2.61 112,900 2.64 112,900 2.67 112,900 2.72

8 5/8 aPi rgul 11 130,700 2.84 130,700 2.87 130,700 2.91 130,700 2.96

11 1/4 147,600 3.33 142,430 3.36 136,800 3.41 130,700 3.46

10 3/4 93,000 2.21 93,000 2.23 93,000 2.26 93,000 2.29

8 5/8 H-90 11 110,800 2.41 110,800 2.43 110,800 2.45 110,800 2.49

(S n 5) 11 1/4 129,200 2.61 129,200 2.63 129,200 2.66 129,200 2.69

f-lb (S n 2)

connectionS WitH LoW torQUe FaceS

While every effort has been made to insure the accuracy of the tables herein, this material is presented as a reference guide only. The technical information containedherein should not be construed as a recommendation. Grant Prideco cannot assume responsibility for the results obtained through the use of this material. Noexpressed or implied warranty is intended.

connectionS WitH FULL FaceS




13/13

Initial Make-up

even though quality connections are heavily coated with phosphate, thread damage is not always prevented. A

generous and thorough application of high-quality thread dope (40 to 60% by weight metallic zinc minimum) will

help minimize galling.

New connections should be walked in with chain tongs. Always use the recommended make-up torque for the thread

design. Exercise care to maintain calibrated torque measuring and indicating gauges for future use. After initial make-up,

break-out the connection, clean and inspect the threads, faces and shoulders. Repair any minor damage. Re-lubricate and

re-torque the connection.

Repeat break-out and make-up a third time before going in the hole. Monitor break-out torque. It should be the same or

less than the make-up torque. High break-out torque is an indication of problems and the connection should be inspect-

ed for damage.

Maintenance

Use thread protectors on both connections when handling drill collars. Rotate breaks on each trip. Clean and inspect the

individual connections.

Qualified personnel should periodically conduct a magnetic particle/black light inspection. Collars that are left idle or put

in storage should be cleaned, inspected, repaired, and rust-proofed, as necessary, before installing thread protectors.

Bending Strength Ratios

Sizes less than 6 should have a BSR of 2.25:1 to 2.75:1. Conditions that require high rpm and small collars compared to the

hole size, use 2.25:1 to 3.00:1. If the rpm is kept low and the collars are closer to the hole size, use 2.25:1 to 3.20:1. In corro-

sive environments, use 2.50:1 to 3.00:1.

Although the current industry BSR calculation for single-shoulder RSC connection types may still be applicable for dou-

ble-shoulder connections (HT, XT, GPDS), the appropriate target ranges are yet to be defined due to limited industry expe-

rience and testing of available types/sizes. Testing performed to date indicates that current target BSR of 2.5 does not

apply to tested double-shoulder connections. Just as target BSR for single shoulder RSCs has taken many years of industryexperience to define, the same may be true for these relatively new double-shoulder offerings. Additionally, target BSRs

for double-shoulder connections may likely vary between connection types

(i.e. GPDS vs. XT). Current industry target BSR ranges should not be used as an indicator of double-shoulder

acceptance/rejection.


CARE AND MAINTENANCE

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Drill Collars