Method and device for preventing pipeskidding

Details Method and device for preventing pipeskidding Method and device for preventing pipeskidding

2007-12-18

2008-12-23

Sterling, Amy J. (Department: 3632)

Boring or penetrating the earth

Wedging slip assembly for supporting a pipe or rod

C248S049000, C248S065000, C166S077400, C166S077520

Reexamination Certificate

active

07467676

ABSTRACT:
A method and device for preventing a pipe string (5) clampingly arranged in a slips (2) from slipping out of the slips (2) in the event of the pipe string (5) slipping in the slips (2), wherein a pipe clamp (22) is clamped, preferably hydraulically, onto the pipe string (5) at a position above the slips (2) and maintained in the clamped state for essentially as long as the pipe string (5) is held by the slips (2), the pipe clamp (22), in the event of the pipe string (5) slipping in the slips (2), being displaced together with the pipe string (5) until the pipe clamp/tong (22) stops against the wedges (16) of the slips (2).

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