Title:
【発明の名称】トグル式ブレーキアウト・スパナ
Document Type and Number:
Japanese Patent JPH10503716
Kind Code:
A
Abstract:
A Toggled Breakout Wrench is described for use with a drilling rig having a drill stem made up of one or more drill pipe sections. The wrench comprises an arm movably connected to the drilling rig such that the arm will move in a substantially arctuate path about a drill pipe section. Pivotally mounted to the arm are a pair of opposed jaws for clamping about the drill pipe section to assist in breaking loose the threaded connections of the drill pipe sections. A toggle linkage enables the opposed jaws to move between a clamping and a non-clamping position about the drill pipe section.
Inventors:
Shah, bernado
Application Number:
JP52612996A
Publication Date:
April 07, 1998
Filing Date:
February 22, 1996
Export Citation:
Assignee:
Lead drill, corp
International Classes:
B25B13/50; B25B21/00; E21B19/16; (IPC1-7): B25B13/50
Attorney, Agent or Firm:
Sanada Yuzo (2 outside)