Intermediate weight drill string member

Details Intermediate weight drill string member Intermediate weight drill string member

E - Fixed Constructions

21

B

255/28

E21B 21/10 (2006.01) E21B 17/16 (2006.01) E21B 17/22 (2006.01)

Patent

CA 1176234

Disclosure 5927 INTERMEDIATE WEIGHT DRILL STRING MEMBER Abstract of the Disclosure An improved intermediate weight member to be put in a drill string between the collars and the drill pipe which has a spiraled outer surface, and which is so configured as to provide a uniform bending moment of inertia over its length including the slip area.

380368

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