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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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718 Drilling and Well Completions<br />

Table 4-71<br />

Drill Collars [la] (all dimensions In inches)<br />

Drill<br />

Collar<br />

Number'<br />

0 A R 6<br />

Bore.<br />

Len&h,<br />

Outside<br />

ft, Bevel Dia, Bendiaa<br />

Dia, +P<br />

+6 in. +* Strenglli<br />

D<br />

d<br />

L D. Ratio<br />

NCOJ-31 (tentative) 3% 1% d n 3 2.57:1<br />

NC26-35(2% IF 3%<br />

h'C31-41(2?6IF1 4%<br />

NC35-47 441<br />

NC38-50(32bIF) 5<br />

NC44-GO<br />

NC44-60<br />

NC4442<br />

NC46-62(4IF)<br />

NC46-65(4IF)<br />

NC46-65 (4IF)<br />

NC46-67(4lF)<br />

6<br />

6<br />

6%<br />

1%<br />

2<br />

2<br />

2%<br />

2%<br />

21t<br />

2%<br />

6% Bf8<br />

6% 2%<br />

6% 2tl<br />

6 U 2%<br />

NC50-70(4HIF) 7<br />

2%<br />

NC50-I0 14 %IF)<br />

I<br />

2ti<br />

NC50-12(4%IF)<br />

7 'k<br />

231<br />

NC56-I7 7% 248<br />

NC56-80 8 2 ti<br />

30<br />

30<br />

30<br />

30<br />

30 or 31<br />

30 or 31<br />

30 or 31<br />

311 2.42:l<br />

31t<br />

2.43:l<br />

48f<br />

2.58:l<br />

4 L! ?.38:1<br />

2.493<br />

2.84:l<br />

2.91:l<br />

30 or 31 5 $4 2.63:l<br />

?O or 31 62% 2.16:1<br />

.I0 or 31 6dc 3.05:l<br />

30 or 31 G& 3.18:l<br />

30 or 31<br />

30 or 31<br />

30 or 31<br />

68t<br />

681<br />

6&?<br />

2.54 : I<br />

2.13:J<br />

3.12:l<br />

:IO or 31 IAI 2.70:l<br />

30 or 31 745 3.02:l<br />

G16REC nx at* :10 or 31 14: 2.93:l<br />

NCG1-DO n 21) 30 or 31 8% 3.11:1<br />

TWREG n 1 . 3 30 or 31 *ti 2.81:l<br />

NCIO-97 9% 3 30 or 31 9* 2.51:J<br />

NC70-10n 10 n :IO or 31 914<br />

2.81:l<br />

NC77-110 (tentative) 11 30 or IS loif 2.78:1<br />

The dnll coll.jr nan1bl.r (CUI. I) umsists 01 two pJr1 uted by J hyplicn Tlic lirst part is the connection number in the<br />

NC siylc. Tlic secund pri. conuating of 2 (or 3) dig diutes tlie drill d1Jr uutvdu diwnetcr 111 units and tenths ut inher<br />

The connectionr rhoxvn in parcnlhcres in CUI I are not a part of the drill collar number; they indicate inlerchdny~bihty "1<br />

drill cvllars nude with the .;l.indard tNC) connections as shoun II the co~~ncct~oi~~ shown in prrentl~rrc* in uulumil I .ire made<br />

wit11 the V-0.03HH ilir...!d Irm the connections and drill coll.irs ire idmticil with lliose in the NC style. Vrill cc;ll.ir\ wit11 M%<br />

and 9% inche\ outside diameters .I~P shu~n with 6.518 and 1-5/H REG connccliun,. since lhcre drr nu NC- cunncctionr 111 tllc<br />

recommended bending \trength ratio range.<br />

Table 4-72<br />

Physical Properties and Tests-New Drill Collars [13]<br />

-<br />

- - i ___ --<br />

-<br />

2 3 4<br />

.__<br />

Minimum Minimum Elongation, Minimum,<br />

Drill Collar Yield Tensile With. Gage Length<br />

OD Range, Strength, Strength, Four Times Diameter,<br />

inches<br />

psi<br />

percent<br />

-- PSI -<br />

3% thru 6% 110,000 140,000 13<br />

7 thru 10 100,000 135,000 13<br />

NOTE 1: Tensile properties shall be determined by tests on cylindrical specimens<br />

conforming to the rcqriirements of ASTM A-$70, 03% offset method.<br />

NOTE 2: Tensile specimens from drill collars shall be taken within S feet of the<br />

end of the drill collar in a longitudinal directwit, having the centerline of tho tensilc<br />

speeimen 1 inch from the outside surfacs or midwall, whichever is less.

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