Drill Collars

Improve your drill string design with Grant Prideco drill collars.

Description
Specifications
Resources

Description

Specifications

Drill Collars Specifications

Drill Collar Material Mechanical Properties

Drill Collar Diameter (in.)	Minimum Yield Strength (psi)	Minimum Tensile Strength (psi)	Minimum Hardness (BHN)
3⅛ through 6⅞	110,000	140,000	285
7 and above	100,000	135,000	285

Tensile properties are determined by tests on cylindrical specimens conforming to the requirements of the current ASTM A370, 0.2% offset method. Hardness tests are performed on the OD of drill collars in compliance with current ASTM standards.

Slip Recess Dimensions

Drill Collar Diameter (in.)	Slip Recess Diameter (in.)
4⅛	3¾
4¾	4⅜
5	4⅝
6	5½
6¼	5¾
6½	6
6¾	6¼
7	6½
7¼	6¾
7¾	7¼
8	7½
8¼	7¾
9	8¼
9½	9
9¾	9¼
10	9½
11	10½

Resources

Spiral-Wate Drill Collar Flyer