Shaped inserts with increased retention force

Details Shaped inserts with increased retention force Shaped inserts with increased retention force

E - Fixed Constructions

21

B

E21B 10/08 (2006.01) B21K 5/02 (2006.01) B23P 15/28 (2006.01) E21B 10/16 (2006.01) E21B 10/50 (2006.01)

Patent

CA 2477673

A shaped insert that includes a top portion, and a grip length, wherein the grip length is modified to have a non-uniform cross sectional area is disclosed. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is modified such that the insert is non-cylindrical. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is coated in a non-uniform manner.

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