| 摘要 |
A torque coupling for connecting between upper and lower tubular members of a drill rig allows make up and break out at lower torques than normally required. The coupling has a body which has an upper end that connects to the upper tubular member and lower end which connects to the lower tubular member. The lower tubular member has an upward facing torque shoulder. A torque shoulder sleeve mounts slideably to the body. The torque shoulder sleeve has a downward facing shoulder that engages the torque shoulder of the lower tubular member. The body and the torque shoulder sleeve have opposed load shoulders, at least one of which is conical. A wedge member locates between these load shoulders. When the wedge member slides outward, it decreases the distance between the load shoulders and reduces the pressure of the lower end of the torque shoulder sleeve against the upper end of the lower tubular member.
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