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Drill Collar

Drill Collar

Standard: API Spec7-1 Material: AISI 4145H Alloy Steel or Non-magnetic material Specification: OD 3-1/8"-11" Length: 10’-31’

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Product Details

Drill Collar

Drill collar is produced by AISI 4145H chromium molybdenum steel as API specification 7-1, which can be cold thread rolling, copper or phosphate processing, machine special double shoulder screw thread and other specifications.


Available Sizes and Grades:

Drill Collar NumberOutside   DiameterBore   DiameterB.S.R.
    Round Number
Length, ft ±6in 
inchmminchmm
NC23-313 1/879.4 1 1/431.82.57:130
NC26-35 (2 3/8 IF)3 1/288.9 1 1/238.12.42:130
NC31-41 (2 7/8 IF)4 1/4104.8 250.82.43:130 or 31
NC35-474 3/4120.7 250.82.58:130 or 31
NC38-50 (3 1/2 IF)5    127.0 2 1/457.22.38:130 or 31
NC44-606    152.4 2 1/457.22.49:130 or 31
NC44-606    152.4 2 13/1671.42.84:130 or 31
NC44-626 1/4158.8 2 1/457.22.91:130 or 31
NC46-62 (4 IF)6 1/4158.8 2 13/1671.42.63:130 or 31
NC46-65 (4 IF)6 1/2165.1 2 1/457.22.76:130 or 31
NC46-65 (4 IF)6 1/2165.1 2 13/1671.43.05:130 or 31
NC46-67 (4 IF)6 3/4171.5 2 1/457.23.18:130 or 31
NC50-67 (4 1/2 IF)6 3/4171.5 2 13/1671.42.37:130 or 31
NC50-70 (4 1/2 IF)7    177.8 2 1/457.22.54:130 or 31
NC50-70 (4 1/2 IF)7    177.8 2 13/1671.42.27:130 or 31
NC50-72 (4 1/2 IF)7 1/4184.2 2 13/1671.43.12:130 or 31
NC56-777 3/4196.9 2 13/1671.42.70:130 or 31
NC56-808    203.2 2 13/1671.43.02:130 or 31
6 5/8 REG8 1/4209.6 2 13/1671.42.93:130 or 31
NC61-909    228.6 2 13/1671.43.17:130 or 31
7 5/8 REG9 1/2241.3 3      76.22.81:130 or 31
NC70-979 3/4247.7 3      76.22.57:130 or 31
NC70-10010    254.0 3      76.22.81:130 or 31
 8 5/8 REG11    279.4 3      76.22.84:130 or 31


Mechanical Properties:

OD rangeYield Strength
    σ0.2 MPa
Tensile Strength
    σb MPa
Elongation
    δ4 %
Hardness HB

Charpy Impact Value

Ak   J

mmin
79.4~171.43 1/8~6 3/4≥758≥965≥13≥285≥54
177.8~279.47~11≥689≥930


Please feel free to contact sales@xoosc.com for further information.

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