Abstract: A clamping device for supporting a well string in a borehole includes a base plate with a central opening and primary clamp body clamp body supported for linear motion relative to the base plate. The clamping device further includes other clamp bodies supported for independent linear motion relative to the base plate. In certain embodiments, the clamping bodies are supported for pivoting motion to open and close the central opening. Each of the clamp bodies carries a gripping member on a face thereof for engaging a well string component received in the central opening. A drive mechanism is coupled to the clamp bodies and configured to move the clamp bodies relative to the base plate.

Abstract: A prior art sucker rod tong is improved to remove a coupling completely from a sucker rod assembly comprising sucker rods joined end to end by couplings. The prior art sucker rod tong has a rotatable jaw assembly and a lower backup wrench adapted to cooperate to unscrew a coupling joining first and second rods, where the coupling remains screwed to the second rod after it is unscrewed from the first rod. The improvement comprises a coupling extractor for unscrewing the coupling from the second rod so that the coupling can be replaced. The coupling extractor comprises a shaft having an extractor end portion on each end of the shaft and a shield around each extractor end portion, wherein the coupling extractor is designed and sized to fit within and to be rotated by the jaw assembly. The extractor end portion engages the inside wall of the coupling to unscrew the coupling from the second rod. The extractor end portion is preferably a tapered, left-handed spiral fluted easy-out extractor.

Abstract: A hydraulic circuit device for activating the at least one clamping die (14) of a power tong (1), the power tong (1) including two housing halves (2), pivotable relative to each other, the housing halves (2) being arranged to be pivoted between a closed, active position and an open, inactive position, and a radially divided drive ring (6, 8) which is provided with the at least one hydraulically activated clamping die (14) directed towards the centre axis (10) of the power tong (1), being placed in the housing halves (2), the drive ring (6, 8) being supported and connected to at least one driving motor (12) for the rotation of the drive ring (6, 8) about the centre axis (10), and a hydraulic pump cylinder (16) being articulatedly connected between the first drive ring part (6) of the drive ring (6, 8) and the second drive ring part (8) of the drive ring (6, 8) and arranged to rotate together with the drive ring (6, 8) about the centre axis (10).

Abstract: A system for clamping and breaking threaded tubular members includes a clamping device configured to grip a threaded tubular member. The clamping device further includes a housing and a base mount associated with the housing. A breaking device can be provided to grip and rotate a threaded tubular member, the breaking device further including a housing and a base mount associated with the housing in which the base mount of clamping device and the base mount of the breaking device are configured to be mounted independently to at least one support structure.

Abstract: A method of using a power tong (2) for use in the pipe make-up and pipe break-out of pipe lengths (22) during drilling in the ground as it is known from, for example, the recovery of petroleum, the power tong (2) being part of an assembly (1) which includes a back-up tong (4) movable relative to the power tong (2) in the longitudinal direction of the pipe length (22), and at least one guide column (10). The tong is releasably connected to a chassis and is arranged to be lifted up from a drill floor to a level higher up in order to break out a pipe from a pipe string, should the pipe string get stuck in the borehole.

Abstract: A method and apparatus for handling tubulars is provided. In one aspect, the present invention provides a spinner having a first arm having a first roller and a second arm having a second roller, the first arm and the second arm simultaneously adjustable to retain the tubular. The apparatus also includes a third roller capable of urging the tubular against the first and second rollers, wherein at least one of the first, second, and third rollers is actuatable to rotate the tubular. In one embodiment, the spinner further comprises a fluid operated cylinder for adjusting the first arm and the second arm. The arms are adjusted by actuating the cylinder extend or retract the first arm and the second arm.

Abstract: A power tong for use during installation and dismantling of pipes when drilling in the ground, such as is known from e.g. petroleum production, comprising a drive ring and at least one clamping device, where the clamping device is arranged to grip a pipe string, the power tong being equipped with a driving mechanism for rotation of the clamping device about the longitudinal axis of the pipe string, and where the clamping device communicates with a fluid supply via a swivel ring that encircles the drive ring.

Abstract: A power tong (1) or back-up tong has a sliding jaw assembly (6) that may be advanced into the throat (4) of the tong for engagement with a pipe. A camming surface (11) on the inside circumference of the ring gear (10) advances the sliding jaw assembly into full engagement with the well pipe when the ring gear (10) is rotated with respect to the jaw assembly.

Abstract: A power tong or back-up tong has a jaw assembly that is advanced into engagement with a pipe through a cam follower that contacts the camming surface on the inside circumference of a ring gear, the cam follower being in the form of a series of roller elements arranged as a circulating bearing. In a preferred form, the roller elements are cylindrical roller bearings and the jaw assembly is mounted for sliding advancement towards the pipe to be engaged. In an alternate variant the cam follower includes an indexing guide that maintains the cylindrical roller bearings in proper alignment.

Abstract: Power tong jaws comprising one or more dies which are rotatable.

Abstract: An apparatus that can be used during drilling operations for the purposes of clamping and holding drilling tubulars is disclosed. The embodiments relate to machinery that clamp and hold drilling tubulars to allow assembly to a specified torque or disassembly of the tubulars. The apparatus comprises a first grip with teeth inserts housed in a gripping block that opposes a second grip with teeth inserts housed in a second gripping block. The first and second grips are spaced and adapted to accommodate a range of diameters of drilling tubulars. Further, the gripping blocks are held by opposing arms connected to a driving means to create a tightening or loosening movement of the grips and maintain a certain orientation with regard to the tubulars.

Abstract: A device for torquing a tubular connection. The device comprises an upper assembly having an upper jaw member, a lower assembly having a lower jaw member, an upper gear for advancing the upper jaw member, and a lower gear for advancing the lower jaw member. The upper jaw member includes a first jaw operatively associated with a first rack, a second jaw operatively associated with a second rack, and a third jaw operatively associated with a third rack. The lower jaw member includes a fourth jaw operatively associated with a fourth rack, a fifth jaw operatively associated with a fifth rack, and a sixth jaw operatively associated with a sixth rack. A method of torquing a first tubular with a second tubular is also disclosed.

Abstract: A power tong or back-up tong has a jaw assembly that is advanced into engagement with a pipe through a cam follower that contacts the camming surface on the inside circumference of a ring gear, the cam follower being in the form of a series of roller elements arranged as a circulating bearing. In a preferred form, the roller elements are cylindrical roller bearings and the jaw assembly is mounted for sliding advancement towards the pipe to be engaged.

Abstract: An apparatus for facilitating the connection of pipes comprises a rotary (4) and a stator (5), the rotary comprising at least one hydraulically actuated jaw (24,25,26), and a pump (58) arranged on the rotary (4) for pumping hydraulic fluid for actuation of the or each jaw (24,25,26), the stator comprising a motor (55) arranged on the stator (5), so that rotational energy can be transferred from the motor to the pump in an operational configuration.

Abstract: A tong as may be used for a continuous circulation system in a wellbore. The tong has a housing with a hollow interior. A plurality of spaced apart jaw assemblies reside within the housing's hollow interior for engaging a portion of a tubular to be gripped and rotated by the tong. A gear wheel is secured to the housing for rotating the housing and the jaw assemblies. The gear wheel includes a toothed outer circumference for mating with teeth of a drive shaft of a driving motor. A gear flange is movably mounted on the gear wheel such that rotation of the gear wheel does not rotate the gear flange.

Abstract: A jaw adapter for use in a pivoting jaw power tong having a cage plate designed to house a pivoting jaw member. The jaw adapter includes an adapter body shaped to fit between the cages plates of a pivoting jaw power tong. The adapter body further includes a pin assembly for engaging at least one of the cage plates, and the adapter body still further includes a sliding jaw passage. A jaw assembly is then positioned within the sliding jaw passage.

Abstract: An apparatus for facilitating the connection of pipes which apparatus comprises a rotary (1) and jaws (20, 21, 22), characterised in that all of said jaws (20, 21, 22) are active and are actuable by pressurised fluid.