Assembly for locking a polished rod in a pumping wellhead
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United States of America Patent
Stats
-
Jul 22, 2003
Grant Date -
Jul 17, 2003
app pub date -
Jan 17, 2002
filing date -
Jan 17, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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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