An insert for releasably retaining cutting means in a ground...

Details An insert for releasably retaining cutting means in a ground... An insert for releasably retaining cutting means in a ground...

E - Fixed Constructions

21

B

E21B 10/66 (2006.01) E21B 23/06 (2006.01)

Patent

CA 2151276

An insert for releasably retaining cutting means in a ground drill, said insert comprising a substantially cylindrical member movable within said ground drill between an installation position in which said insert retains said cutting means in a cutting position between an outer circumferential surface of said insert and an inner circumferential surface of said ground drill, and a retrieval position in which said insert is retracted to release said cutting means from between said outer circumferential surface of said insert and said inner circumferential surface of said ground drill.

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