A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises first-jaw arcuate convex contact surfaces. The second jaw, is coupled with and pivotable relative to the first jaw, and comprises second-jaw arcuate convex contact surfaces. The third jaw, is coupled with and pivotable relative to the second jaw, and comprises third-jaw arcuate convex contact surfaces.

A clamping socket assembly and method includes positioning a fastener body in a collet. The collet has a first end and a second end, wherein the second end receives the body. The first end includes a tool mating member. The collet has a perimeter wall having a plurality of slots extending therein that extend into the second end to define a plurality of wings. A sleeve is positioned on the collet and is threadably coupled to the collet. The sleeve is rotated in a first direction to threadably couple the sleeve to the collet such that the sleeve moves toward the second end and urges the wings into frictional engagement with the fastener body. A tool is extended through the distal end and into the tool mating member. The tool is rotated to rotate the collet and the body.

A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises first-jaw arcuate convex contact surface, second first-jaw arcuate convex contact surface, third first-jaw arcuate convex contact surface, and first-jaw planar contact surface. The second jaw is coupled with and pivotable relative to the first jaw and comprises a second-jaw arcuate convex contact surface and a second-jaw planar contact surface. The third jaw is coupled with and pivotable relative to the second jaw and comprises a third-jaw arcuate convex contact surface and a third-jaw planar contact surface.

A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises first-jaw arcuate convex contact surface, second first-jaw arcuate convex contact surface, third first-jaw arcuate convex contact surface, and first-jaw planar contact surface. The second jaw is coupled with and pivotable relative to the first jaw and comprises a second-jaw arcuate convex contact surface and a second-jaw planar contact surface. The third jaw is coupled with and pivotable relative to the second jaw and comprises a third-jaw arcuate convex contact surface and a third-jaw planar contact surface.

Infiltrated diamond bodies for use in gripping drill rods and other tubulars. One example of such an infiltrated diamond body is a cast diamond roller having a plurality of pads that are separated by channels. Another example of such an infiltrated diamond body is a cast wrench jaw having at least one raised jaw pad.

Infiltrated diamond bodies for use in gripping drill rods and other tubulars. One example of such an infiltrated diamond body is a cast diamond roller having a plurality of pads that are separated by channels. Another example of such an infiltrated diamond body is a cast wrench jaw having at least one raised jaw pad.

A tool for unscrewing a stud has a body with cam surfaces in a bore. A recess extends through the cam surfaces. Jaws have outer sides in engagement with one of the cam surfaces and inner sides containing teeth. An outward protruding rib on the outer side of each of the jaws inserts into the recess. Rotation of the body in a first direction causes the cam surfaces to slide in the first direction along the outer sides of the jaws, pushing the jaws to a gripping position. Rotation of the body in a second direction causes the cam surfaces to slide in the second direction along the outer sides of the jaws, enabling the jaws to move to a retracted position.

An adjustable socket assembly includes a collet having a first end, a second end, and a perimeter wall. The second end has a receiving aperture therein. The collet is divided into a plurality a plurality of sections. A sleeve has a bottom end that receives the collet. The sleeve has an interior surface that tapers inwardly and abuts the sections to move toward each other as the sleeve moves toward the second ends of the sections. A biasing member extends through a top end of the sleeve and engages each of the sections. The biasing member is actuated to bias the sleeve downward to close together the sections and engaged the valve actuator. An engagement head is attached to the upper end of the biasing member and engages a tool to rotate the collet.

An adjustable socket assembly includes a collet having a first end, a second end, and a perimeter wall. The second end has a receiving aperture therein. The collet is divided into a plurality a plurality of sections. A sleeve has a bottom end that receives the collet. The sleeve has an interior surface that tapers inwardly and abuts the sections to move toward each other as the sleeve moves toward the second ends of the sections. A biasing member extends through a top end of the sleeve and engages each of the sections. The biasing member is actuated to bias the sleeve downward to close together the sections and engaged the valve actuator. An engagement head is attached to the upper end of the biasing member and engages a tool to rotate the collet.

A quick reciprocating wrench includes a main body, a claw, and an elastic device therebetween. The main body includes a first jaw opening having a pivot end and a block portion. The claw includes a second jaw opening having a pivotal combination portion and a retaining portion. The pivotal combination portion is pivotally connected with the pivot end, so the claw and the main body pivotally move against each other. The fastener is engaged in the first and the second jaw openings. Distance between the block portion and the neighboring force bearing face of the fastener decreases along a direction in opposite to the expansion direction of the claw and the block portion. The largest width of the distal end of the retaining portion is greater than the smallest distance between the block portion and the first force bearing face of the fastener.