Sucker rod

Details Sucker rod Sucker rod

E - Fixed Constructions

21

B

E21B 17/042 (2006.01)

Patent

CA 2634557

An improvement in a sucker rod having an elongated metal body with opposed ends and threaded couplings positioned at each of the opposed ends comprises a thread form on the threaded couplings defining at least two concurrent helixes. Each of the at least two helixes has a different starting position on a circumference of the threaded coupling.

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