Two-piece downhole drill chuck

Details Two-piece downhole drill chuck Two-piece downhole drill chuck

E - Fixed Constructions

21

B

255/26, 255/54

E21B 17/10 (2006.01) E21B 17/07 (2006.01)

Patent

CA 1328255

TWO PIECE DOWNHOLE DRILL CHUCK ABSTRACT Disclosed is a two piece drill chuck for use with downhole drills and the like. The new chuck features a replaceable wear collar portion which permits optimum material selection and heat treatment for each part of the chuck thereby extending its useful life. By expanding the wear collar slightly beyond the drill diameter and extending it axially rearward an improved measure of protection is also afforded to the drill casing.

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