EP 0166675 A3 19861210 - WRENCH AND WRENCH ASSEMBLY
Title (en)
WRENCH AND WRENCH ASSEMBLY
Publication
Application
Priority
US 62618684 A 19840629
Abstract (en)
[origin: EP0166675A2] A wrench assembly for making and breaking connections between tubular members, such as a drill string and a top drive sub. The wrench assembly consists of a lower wrench (33) and an upper wrench (31). The lower wrench (33) has a curved gate arm (41) and a curved latch arm (43) pivotable between an open position and a closed position. The gate arm (41) has a plurality of teeth on its outer surface, and the latch arm (43) has a plurality of teeth on its inner surface, for locking engagement with the teeth on the gate arm (41). The lower wrench (33) also has a clamping cylinder (61) and a die block (59) for forcing the tubular member against the gate arm (41). The upper wrench (31), mounted above the lower wrench (33), has a semicircular plate (65). At least one spline (67) is mounted on the interior surface of the semicircular plate (59) for engagement with at least one spine on the top drive sub. A fluid cylinder (71) is provided for applying torque to the wrenches to rotate one of the wrenches with respect to the other wrenches.
IPC 1-7
IPC 8 full level
E21B 19/16 (2006.01)
CPC (source: EP)
E21B 19/16 (2013.01)
Citation (search report)
- [A] US 2495834 A 19500131 - ODIE COLQUITT
- [A] US 4200010 A 19800429 - HEWITT BURTON L [US]
- [A] US 3799009 A 19740326 - GUIER W
- [A] US 2649283 A 19530818 - LUNDEEN CHESTER A
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0166675 A2 19860102; EP 0166675 A3 19861210; EP 0166675 B1 19900117; CA 1232537 A 19880209; DE 3575448 D1 19900222; NO 852466 L 19851230
DOCDB simple family (application)
EP 85630095 A 19850620; CA 472961 A 19850128; DE 3575448 T 19850620; NO 852466 A 19850619