Compensation device for insertion in a drill string for...

Details Compensation device for insertion in a drill string for... Compensation device for insertion in a drill string for...

E - Fixed Constructions

21

B

255/28

E21B 17/10 (2006.01) E21B 17/07 (2006.01) F16L 15/00 (2006.01) F16L 15/08 (2006.01) E21B 17/043 (2006.01)

Patent

CA 1223248

"COMPENSATION DEVICE FOR INSERTION IN A DRILL STRING FOR DEEP-WELL DRILLING TOOLS" ABSTRACT: A compensation device for deep-well drilling tools with a transversely divided outer pipe, the pipe members (1 and 2) of which can be rigidly connected to one another by a screw thread (8) and comprise adjacent end faces (5 and 6) as stop faces which approach one another when the pipe members are screwed together and move apart from one another during the unscrewing, comprises a spacing member (3) which can be inserted radially, from the outside, between the end faces. The screw thread (8) has a length of engagement which secures the firm connection between the pipe members within the whole preset compensating range.

447486

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