Adjustable-size jaw sub-assemblies, jaw assemblies made from such sub-assemblies, and tools, particularly hand tools, made using such jaw assemblies. A plurality of jaws are connected to a base ring by pivot pins. Cam follower recess can be defined at positions of the inner perimeter of the base ring, and between opposing faces of the base ring. In the jaw assemblies, an actuator, such as a cover plate, covers at least a portion of one of opposing faces of the base ring, and one or more bridges connect the jaws to the actuator. Movement of the base ring relative to the actuator causes the jaws to pivot about the pivot pin axes, with the jaws moving in concert with each other thereby to reduce or expand the size of a work opening defined by the jaws.

Adjustable-size jaw sub-assemblies, jaw assemblies made from such sub-assemblies, and tools, particularly hand tools, made using such jaw assemblies. A plurality of jaws are connected to a base ring by pivot pins. Cam follower recess can be defined at positions of the inner perimeter of the base ring, and between opposing faces of the base ring. In the jaw assemblies, an actuator, such as a cover plate, covers at least a portion of one of opposing faces of the base ring, and one or more bridges connect the jaws to the actuator. Movement of the base ring relative to the actuator causes the jaws to pivot about the pivot pin axes, with the jaws moving in concert with each other thereby to reduce or expand the size of a work opening defined by the jaws.

A frame stiffener for a power tong frame comprises a body having a top surface securable to a top plate of the frame, a bottom surface securable to the bottom plate of the frame, an outer side and an interior side having a plurality of recesses, each recess formed to conform to an angular portion of an adjacent dumbbell roller secured within the frame along with a plurality of other dumbbell rollers to rollably surround, engage and stabilize a ring gear rotatably disposed within the frame.

Adjustable-size jaw sub-assemblies, jaw assemblies made from such sub-assemblies, and tools, particularly hand tools, made using such jaw assemblies. A plurality of jaws are connected to a base ring by pivot pins. Cam follower recess can be defined at positions of the inner perimeter of the base ring, and between opposing faces of the base ring. In the jaw assemblies, an actuator, such as a cover plate, covers at least a portion of one of opposing faces of the base ring, and one or more bridges connect the jaws to the actuator. Movement of the base ring relative to the actuator causes the jaws to pivot about the pivot pin axes, with the jaws moving in concert with each other thereby to reduce or expand the size of a work opening defined by the jaws.

A tool for installing or removing a threaded member as for example a thread protector onto a second threaded member, as for example, the pin or box of an oilfield tubular, which has a jaw for selectively gripping an outer surface of a thread protector, a bridge interconnecting the jaw and a cam, the cam being selectively engageable with the inner surface of the thread protector, the cam being operatively connected to a lever for moving the cam from a first position out of contact with the inner surface of the thread protector to a second position in gripping engagement with the inner surface of the thread protector.

Adjustable-size jaw sub-assemblies, jaw assemblies made from such sub-assemblies, and tools, particularly hand tools, made using such jaw assemblies. A plurality of jaws are connected to a base ring by pivot pins. Cam follower recess can be defined at positions of the inner perimeter of the base ring, and between opposing faces of the base ring. In the jaw assemblies, an actuator, such as a cover plate, covers at least a portion of one of opposing faces of the base ring, and one or more bridges connect the jaws to the actuator. Movement of the base ring relative to the actuator causes the jaws to pivot about the pivot pin axes, with the jaws moving in concert with each other thereby to reduce or expand the size of a work opening defined by the jaws.

A frame stiffener for a power tong frame comprises a body having a top surface securable to a top plate of the frame, a bottom surface securable to the bottom plate of the frame, an outer side and an interior side having a plurality of recesses, each recess formed to conform to an angular portion of an adjacent dumbbell roller secured within the frame along with a plurality of other dumbbell rollers to rollably surround, engage and stabilize a ring gear rotatably disposed within the frame.

An automated pipe wrench assembly for tightening and loosening a pipe includes a wrench that may insertably receive a pipe. A drive is coupled to the wrench and the drive engages the pipe when the wrench insertably receives the pipe. The drive selectively rotates the pipe thereby facilitating the wrench to tighten the pipe.

An automated pipe wrench assembly for tightening and loosening a pipe includes a wrench that may insertably receive a pipe. A drive is coupled to the wrench and the drive engages the pipe when the wrench insertably receives the pipe. The drive selectively rotates the pipe thereby facilitating the wrench to tighten the pipe.