초록 ▼

A tong assembly for use in making-up and breaking-out joints of varying diameter. The tong assembly includes a housing, a carrier element, at least one jaw, a link corresponding to each jaw and pivotably connected to the carrier element and to which the corresponding jaw is pivotably connected, a dr

A tong assembly for use in making-up and breaking-out joints of varying diameter. The tong assembly includes a housing, a carrier element, at least one jaw, a link corresponding to each jaw and pivotably connected to the carrier element and to which the corresponding jaw is pivotably connected, a drag means, and a brake means. A power means may be connected to the tong assembly to drive the tong and a backup tong may be secured relative to the housing and to the power means of the tong assembly.

대표청구항 ▼

A tong assembly for rotating a tubular member comprising, a housing, having a housing slot for receiving the tubular member, a carrier rotatably supported from the housing, the carrier having a carrier slot for receiving the tubular member, at least one freely pivotable jaw for engaging and rotating

A tong assembly for rotating a tubular member comprising, a housing, having a housing slot for receiving the tubular member, a carrier rotatably supported from the housing, the carrier having a carrier slot for receiving the tubular member, at least one freely pivotable jaw for engaging and rotating the tubular member, each jaw having jaw coaction means connected thereto, an individual link for each jaw freely pivotably connected to each jaw and freely pivotably connected to the carrier element, a drag means connected to the carrier element and coacting with each jaw for moving each jaw relative to the tubular member, the drag means having a drag means slot for receiving the tubular member, and the drag means having drag coaction means for coacting with each jaw coaction means for maintaining the symmetry of the jaws about the tubular member when there is more than one jaw and for limiting the movement of each jaw to substantially radial movement along the center line of the tubular member, and a brake means for engaging the drag plate and actuating each jaw.