Assembly for locking a polished rod in a pumping wellhead

Details Assembly for locking a polished rod in a pumping wellhead Assembly for locking a polished rod in a pumping wellhead

E - Fixed Constructions

21

B

E21B 33/03 (2006.01) E21B 19/06 (2006.01)

Patent

CA 2368877

The assembly functions to clamp onto and frictionally engage the polished rod of a well's rod string, with sufficient force to suspend the string from the wellhead. The assembly comprises an annular body forming opposed, radial, internally threaded side openings extending from its outer circumferential surface to its central vertical bore. An externally threaded locking member is positioned in each side opening and protrudes externally. The locking members can be manually threaded inwardly to engage the polished rod. An external leverage assembly is anchored to the body and engages one of the locking members. This leverage assembly can be manually turned to tighten the locking member against the polished rod with powerful axial force to provide enhanced gripping.

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