Compensation device for insertion in a drill string for deep-wel

Details Compensation device for insertion in a drill string for deep-wel Compensation device for insertion in a drill string for deep-wel

1984-03-02

1985-11-19

Leppink, James A.

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

403343, 285355, E21B 406, E21B 17043

Patent

active

045536147

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.

REFERENCES:
patent: 2179202 (1939-11-01), Simpson
patent: 2535320 (1950-12-01), Richardson
patent: 2539057 (1951-01-01), Brown
patent: 4118135 (1978-10-01), Cooper
patent: 4511007 (1985-04-01), Jung et al.

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