Drill stem guide and wrench apparatus

Details Drill stem guide and wrench apparatus Drill stem guide and wrench apparatus

2007-01-11

2010-02-23

Gay, Jennifer H (Department: 3672)

Wells

Above ground apparatus

With means facilitating connecting or disconnecting...

C166S379000, C081S057190

Reexamination Certificate

active

07665514

ABSTRACT:
A drill stem centralizer and/or breakout wrench includes a frame with opposed hydraulic cylinder actuators mounted on the frame and engaged in with jaw support members for movement toward and away from each other for centralizing or breakout of drill stem sections. The hydraulic actuators are mounted on trunnions which are supported by bearing caps which may be indexed to change the spacing of the opposed actuators to accommodate a wide range of drill stem diameters or cross-sectional shapes. The jaw support members are provided with laterally spaced guide parts which are moveable in slots in the frame to guide the jaw support members for linear reciprocal movement in response to actuation by the hydraulic actuators. The frame may be mounted for limited rotation on a feed beam to effect drill stem breakout operations.

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patent: 2007/0068669 (2007-03-01), Lesko
International Preliminary Report on Patentability issued Jul. 14, 2009 in PCT/US2008/000319.

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