Well rod, centralizer and centralizer stop interfaces with...

Details Well rod, centralizer and centralizer stop interfaces with... Well rod, centralizer and centralizer stop interfaces with...

E - Fixed Constructions

21

B

E21B 17/10 (2006.01)

Patent

CA 2160400

Improved wear interface surfaces on well rod centralizers and centralizes stops. Well apparatus includes a rotary tool in a string of tubing extending into a well hole in the earth and a rod extending to the ground surface through such tubing which is drivingly connected to the tool. Centralizers are used on the rod and are located between a pair of centralizes stops. The stops and centralizers associated therewith having wear interface surfaces and at least one of the wear interface surfaces which abut one another having a material thereon of a hardness in the range of 7 to 10 in Mohs scale of hardness and thereby having a hardness greater than the hardness of abrasive materials likely, during use, to pass through said tubing.

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