W-k-m Wellhead Systems, Inc.

John P Honaker, Jr

Joe G Chambless

James T Carmichael

A pipe anchoring device including an annular segmented support mounted in the bowl of a wellhead assembly. Each of the segments has a generally cylindrically shaped front face with a plurality of upwardly extending teeth thereon to engage a pipe, and a frustoconically shaped back face with a smooth surface load bearing lower portion and a plurality of sharp downwardly extending teeth adjacent the load bearing smooth lower portion with the teeth extending to the conical plane defined by the surface forming the lower portion. The outer smooth surface portion of the back face is in slidable load bearing contact with the adjacent support structure under initial loading as teeth on the front face engage the pipe, and under higher loading conditions the teeth on the back face bite into the adjacent support structure. One embodiment of the segments has a load bearing smooth upper portion on its back face adjacent the teeth and in slidable contact with the support structure.

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LA, CA, United States of America

John P Honaker, Jr