Device for controlling torque of hydraulic/pneumatic tongs

• Main Authors: YUNGAO BAI, GUANGGUI ZENG, MINGSHU LI
• Format: Patent
• Language: English
• Published: 22.12.1999
• Edition: 6
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model provides a device for controlling torque of hydraulic and pneumatic tongs for buckle mounting and dismounting operations of an oilfield well drilling tool. The utility model is composed of an integral valve body, a short pitch, a cross joint, an adaptor, a valve seat, a high voltage spill valve, an air controlled reversing valve and a pressure regulating valve. The utility model is that crisscross oil pipe lines pore channel on the integral valve body can be effectively connected with the tongs valve seat, the high voltage spill valve, the air controlled reversing valve, the pressure regulating valve, a pressure meter, a remote-controlled oil pipe line interface and a technical data sensor interface as an entirety. The structure of the utility model is optimized, and the volume and weight are decreased. When the tongs works with a lower gear, the device for controlling torque of hydraulic and pneumatic tongs can control the upper buckle torque of the drilling tool to ensure that the service life of the drilling tool is prolonged according to a preset torque value.