Simultaneous clamp and torque drive

摘要

A clamping system for making and breaking threaded connections between a first tubular and a second tubular comprises a clamp assembly. The clamp assembly includes a first cam gear, a first plurality of clamp members disposed within the first cam gear, and a torque gear. Each clamp member is pivotally coupled to the torque gear. Each clamp member is configured to pivot between a withdraw position radially spaced apart from the first tubular and a gripping position engaging the first tubular. In addition, the clamping system comprises a clamp actuator. The clamp actuator includes a mounting shaft, a first clamp drive gear rotatably coupled to the mounting shaft, and a torque drive gear rotatably coupled to the mounting shaft. The first clamp drive gear is configured to rotate the first cam gear and the torque drive gear is configured to rotate the torque gear.

主权项

1. A clamping system for making and breaking threaded connections between a first tubular and a second tubular, the system comprising:
a clamp assembly for gripping and rotating the first tubular relative to the second tubular, the clamp assembly having a central axis and including a first cam gear, a first plurality of clamp members disposed within the first cam gear, and a torque gear; wherein the first cam gear has a radially inner surface comprising a plurality of circumferentially adjacent concave recesses defining a plurality of circumferentially adjacent cam surfaces, wherein one clamp member of the first plurality of clamp members is disposed in each recess of the first cam gear; wherein each clamp member is pivotally coupled to the torque gear; wherein each clamp member is configured to pivot between a withdraw position radially spaced apart from the first tubular and a gripping position engaging the first tubular; a clamp actuator for operating the clamp assembly, the clamp actuator having a central axis and including a mounting shaft, a first clamp drive gear rotatably coupled to the mounting shaft and a torque drive gear rotatably coupled to the mounting shaft; wherein the first clamp drive gear engages the first cam gear and is configured to rotate the first cam gear and wherein the torque drive gear engages the torque gear and is configured to rotate the torque gear.