Polished rod clamp

Details Polished rod clamp Polished rod clamp

E - Fixed Constructions

21

B

E21B 43/00 (2006.01) E21B 33/03 (2006.01) E21B 43/12 (2006.01) F04B 47/02 (2006.01)

Patent

CA 2237835

In an oil well pump, a rod liner is clamped onto a polished rod using an external clamp with an upper clamp section that clamps onto the polished rod, a lower clamp section that clamps onto the liner below the liner head and a yoke section bridging the upper and lower clamp section. In the preferred embodiment, the clamp has a main body extending across the liner head and upper and lower clamping blocks for clamping the rod and the liner respectively to the main body on opposite sides of the liner head.

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