Rod coupling

Details Rod coupling Rod coupling

E - Fixed Constructions

21

B

E21B 17/02 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2331096

A rod coupling is formed of a tubular housing with first and second box ends having an exterior surface and an interior surface defining a bore extending from the first box end to the second box end. Plural openings extend transversely through the housing from the exterior surface to the interior surface. A wear coating on the exterior surface of the tubular housing covers the plural openings, and may fill the openings or extend through the openings to form knobs inside the tubular housing. The wear coating may taper from the exterior surface towards the interior surface. The openings are preferably distributed uniformly around the tubular housing. The openings are preferably distributed in plural rows. A rod string may be made up of plural such rod couplings and connecting rods.

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