| 摘要 |
Disclosed herein is a combined pump rod clamp/BOP for use in a wellbore. The pump rod clamp/BOP is capable of supporting the weight of the pump rod, preventing axial or rotational movement of the rod, and simultaneous preventing fluids from escaping from the well, while maintaining electrical conductivity between the BOP and the polish rod. The pump rod clamp/BOP features rams having an arcuate channel for clamping a pump rod. The rams include a gripping non-metallic material non-releasably disposed on the engaging face of the ram. The non-metallic material can coat the entire engaging face of the ram, the arcuate channel only, or part of the arcuate channel. The non-metallic gripping material prevents the rams from damaging the pump rod when they engage the rod.
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