摘要:
A slip for supporting a member, such as a pipe. The slip comprises one or more rolling elements, such as roller, for gripping the member. The rolling elements may contact each other. The slip may be formed from a plurality of pivotally connected segments. The rolling elements may be arranged to roll along ramps, arranged to urge the members into contact with a member to be gripped.
摘要:
An oilfield elevator is disclosed and has first and second body halves pivotally-coupled at a hinge and moveable between an open position and a closed position to receive and move a tubular segment. Slips are slidably received within corresponding tapered slots in the elevator and are configured to translate vertically within the tapered slots and, at the same time, radially so as to be able to capture a wider range of tubular having varied outside diameters. Tension handles are pivotally-coupled to the first and second body halves and moveable between locked and unlocked positions. Locking the tension handles engages the slips via biasing members, and forces the slips into radial contact with the tubular segment. Unlocking the tension handles releases the biasing members.
摘要:
An apparatus (201; 301; 401; 501; 601) and a method to support a tubular member (291; 391A; 391B; 491; 691) are disclosed herein. The apparatus (201; 301; 401; 501; 601) comprises a bowl (203; 303; 403; 503; 603) having a longitudinal axis extending therethrough, in which the bowl (203; 303; 403; 503; 603) comprises a first opening (207) formed at a top side of the bowl (203; 303; 403; 503; 603), a second opening (209) formed at a bottom side of the bowl (203; 303; 403; 503; 603), an inner wall (211; 311; 411; 611) extending from the first opening (207) to the second opening (209) about the longitudinal axis, and a shoulder (213; 313; 413; 613) disposed on the inner wall (211; 311; 411; 611) that extends towards the longitudinal axis with respect to the inner wall (211; 311; 411; 611). A top surface (215; 315; 415; 615) of the shoulder (213; 313; 413; 613) is angled upwardly in a radially inward direction with respect to the longitudinal axis. The apparatus (201; 301; 401; 501; 601) further comprises a plurality of slip assemblies (221; 321; 421; 621) movably disposed within the bowl (203; 303; 403; 503; 603) and having a tapered inner surface (223; 323; 423; 623) with respect to the longitudinal axis.
摘要:
A slip device includes a housing forming an axial bore, an upper set of slips spaced axially above a lower set of slips, and a rack and pinion actuator radially moving the upper set of slips and the lower set of slips between a retracted position and an extended position to grip a tubular disposed in the bore. The upper set of slips and the lower set of slips can be oriented to resist downward movement of the gripped tubular and to permit upward movement of the gripped tubular. One of the upper set of slips and the lower set of slips can be oriented to resist upward movement of the gripped tubular and the other of the upper set of slips and the lower set of slips can be oriented to resist downward movement of the gripped tubular.
摘要:
A rotary table has a non-circular drive recess in the central opening which carries an assembly of mounting structures and slip carriers that when joined together fit in the non-circular drive recess. The plurality of slip carriers are distributed about the periphery of the drive recess are extended down into the central opening of the rotary table. A slip and die arrangement is situated on each slip carrier. Slip manipulation drive cylinders, are distributed about the assembly periphery and move a synchronizer plate that moves the slips vertically to grip or release pipe extending through the opening of the rotary table.
摘要:
Disclosed is an apparatus to support a tubular member such as pipes, in particular in deep drilling, in particular in the field of oil and gas production, for instance in deep drilling, wherein a plurality of linear actuators for moving clamp elements are orientated with their actuator axis in a cone angle of a sliding surface for the clamp elements, and wherein the linear actuators are positioned in the clamp elements.
摘要:
A gripping tool includes a gripping element and at least one gripping surface formed on the gripping element. The at least one gripping surface includes a plurality of teeth extending from the gripping element an outer layer. A method to surface process a gripping surface of a gripping tool includes providing the gripping surface in an environment comprising a source of additive material and heating the gripping surface at a temperature and a time to diffuse the additive material a depth into the gripping surface to form a diffusion layer.
摘要:
Spring loaded dogs are attached to the housing to engage the casing internally or externally to facilitate extension or retraction of the slips that selectively grab the topmost of a string of casing. When the tool is suspended from the top drive, its components are rotationally locked to facilitate insertion into the casing stand on top of a string being run in the hole. Some set down weight allows top drive rotation to move a multi-ramped mandrel axially because that mandrel is rotationally locked to the housing that is held fast by the spring loaded dogs bearing on the casing. Once the slips are extended with a specified torque applied from the top drive, further setting down weight locks the components and the housing so that applied rotation with setting down weight will turn the casing string but will not torque up the slips beyond their set position.