Wrench assembly with eccentricity sensing circuit

A wrench assembly, comprising;

• an upper clamp assembly;
• a lower clamp assembly coupled to the upper clamp assembly;
• an alignment device disposed between the upper and lower clamp assemblies, wherein the alignment device is configured to adjust an axis about which the wrench assembly applies torque by allowing the upper clamp assembly to move laterally relative to the lower clamp assembly;
• and
• an eccentricity sensing switch coupled between the upper clamp assembly and the lower clamp assembly and configured to stop one or more of the lower or upper clamp assembly from applying torque to a tubular connection, the eccentricity sensing switch comprising a valve in fluid communication with a hydraulic fluid circuit that supplies a pressurized fluid to the wrench assembly, wherein the hydraulic fluid circuit comprises a first flow path that flows to the wrench assembly, a second flow path that flows to a return, and a third flow path that flows between the first flow path and the second flow path, wherein the valve is movable between a closed position and an open position, and wherein in the open position the valve opens the third flow path to flow the pressurized fluid from the first flow path to the second flow path.

A wrench assembly, comprising;

• an upper clamp assembly;
• a lower clamp assembly coupled to the upper clamp assembly;
• an alignment device disposed between the upper and lower clamp assemblies, wherein the alignment device is configured to adjust an axis about which the wrench assembly applies torque by allowing the upper clamp assembly to move laterally relative to the lower clamp assembly, wherein the alignment device comprises a wedge that engages a groove, the wedge being movable relative to an upper plate of the lower clamp assembly;
• and
• an eccentricity sensing switch coupled between the upper clamp assembly and the lower clamp assembly and configured to stop one or more of the lower or upper clamp assembly from applying torque to a tubular connection, the eccentricity sensing switch comprising a valve in fluid communication with a hydraulic fluid circuit that supplies a pressurized fluid to the wrench assembly, wherein the hydraulic fluid circuit comprises a first flow path that flows to the wrench assembly, a second flow path that flows to a return, and a third flow path that flows between the first flow path and the second flow path, wherein the valve is movable between a closed position and an open position, and wherein in the open position the valve opens the third flow path to flow the pressurized fluid from the first flow path to the second flow path.

A wrench assembly, comprising;

• a lower clamp assembly;
• an upper clamp assembly coupled to the lower clamp assembly that is adapted to move laterally relative to the lower clamp assembly when rotated relative to the lower clamp assembly;
• and
• an eccentricity sensing switch coupled between the upper clamp assembly and the lower clamp assembly and configured to stop one or more of the lower or upper clamp assembly from applying torque to a tubular connection, the eccentricity sensing switch comprising a valve in fluid communication with a hydraulic fluid circuit that supplies a pressurized fluid to the wrench assembly, wherein a wedge is biased into engagement with a groove, the valve is biased into a closed position, the groove is formed in a lower plate of the upper clamp assembly, and the wedge is disposed at least partially through an upper plate of the lower clamp assembly.