Abstract: A system includes a spear hook for gripping into a compacted wireline, a spear that deploys the spear hook, and a hook hinge rotatably coupling the spear hook to the spear. The tool also includes a hook activator mounted in the spear to cause expansion and contraction of the spear hook. The spear hook expands and contracts along a path defined by the hook hinge in a radial direction from a spear outer surface of the spear. The tool also includes a compaction component, coupled to the spear, for compacting a wireline to form the compacted wireline.

Abstract: A fail safe locking overshot device. The overshot device is connected to a hoisting line for retrieval of a spearhead. The device provides automatic engagement of a mechanical locking system through locking dogs for locking the lifting dogs after capture of a spearhead. Manual disengagement is required to unlock the lifting dogs and release the spearhead.

Abstract: A device with an overshot including a first part with an elongated body adapted to be connected to a hoisting line in one end and with a tubular opening arranged/designed to receive a spearhead in the other end. The overshot further includes a second part with a scissor like mechanism including two lifting dogs arranged to pivot around a common pivot pin. The lifting dogs are connected via a biasing unit and the elongated body includes a central, axially extending slot. The scissor like mechanism is arranged with the common pivot pin sliding in the slot between a first end position where the biasing unit is arranged to close the lifting dogs such that a spearhead received in the tubular opening is locked and a second end position where an opener including an opening pin is arranged to force the lifting dogs open against the force of the biasing unit, such that a spearhead received in the tubular opening is released.

Abstract: An overshot includes a sleeve. A coupling member having a latched state and an unlatched state is disposed at a first end of the sleeve. A load-responsive toggle mechanism for alternating the coupling member between the latched state and the unlatched state is disposed at a second end of the sleeve.

Abstract: Overshot fishing tools for retrieving objects, i.e., “fish” lodged within a wellbore are disclosed. The overshot fishing tool comprises a housing having a housing bore with at least one recess disposed along the inner wall surface of the housing bore. A slip is disposed within each of the recesses. Each slip has a gripping profile for engaging and securing the fish. Each slip also has a length and a width such that the slip, when actuated, provides circumferential loading on the housing. In specific embodiments, each slip includes two or more different gripping profiles to facilitate retrieval of different types and sizes of fish.

Abstract: Disclosed is an improved spear head overshot. The spear head overshot is particularly useful as part of a cable-guided fishing assembly. The spear head overshot essentially comprises one or more pivot lugs, the pivot lugs comprising jaw sections and release point sections, an actuator slide, a wave spring, a pivot mandrel, a screw attached to the pivot mandrel, and a compression spring threaded over the screw. In operation, a spear head is inserted into the spear head overshot until the spear head passes the jaw sections of the pivot lugs, at which time the spear head is locked into place. To release the spear head, the release point sections of the pivot lugs are manually forced inward. Simultaneously, the jaw sections of the pivot lugs are forced outward, thereby allowing the spear head to be removed from the spear head overshot. In a cable-guided fishing operation, this process can be repeated as often as necessary.

Abstract: An apparatus and method for removing an object from a drain for includes a pair of arms each having a first end, a second end, a medial portion, a first side and a second side. Each of the first sides is convexly curved. A pivot member extends between and is pivotally attached to the medial portions so that the first sides facing each other. A slide member engages each of the first sides and urges the first ends toward each other as the slide member moves toward the pivot member. An actuator is configured to selectively move the slide member toward or away from the pivot member. A connector is attached to the actuator and is configured to releasably couple the actuator to a drain snake. Rotation of the drain snake actuates the actuator to grip the object when the first ends are adjacent to the object.

Abstract: Lockable overshot (10) includes an elongated body (12), lifting dogs (14a, 14b) and a locking sleeve (16). Ends (18) of the lifting dogs (14) are configured for latching a conventional spearhead point therebetween. The locking sleeve (16) is retained on the body (12) and is provided at one axial end with a circumferential wall (66) and two diametrically opposed gaps (68). The locking sleeve (16) is rotatable on the body (12) between a locked state preventing ends (18) of the lifting dogs from pivoting away from each other to release a previously latched spearhead point, and an unlocked state where the locking sleeve (16) allows the lifting dogs (14) to move so that the ends (18) can be pivoted away from each other to release a previously latched spearhead point. In this regard, the locking sleeve (16) is provided at one axial end with a circumferential wall (66) provided with a pair of diametrically opposed gaps (68).

Abstract: A one-trip system for removing casing from a wellhead is described. The string includes a cutting device spaced at the required depth and a grappling device above it at the appropriate location. A swivel tool, such as a marine swivel, is used in conjunction with a seal-pulling assembly so that after cutting the casing, the seal assembly can be pulled without an additional trip into the well. The grappling device or spear can be hydraulically actuated to grab the casing for removal from the wellbore. The spear features a drop-in restrictor which allows sufficient flow during cutting operations with a mechanical cutter without actuating the spear, while at the same time allowing actuation of the spear by circulation after dropping in the restrictor after the casing section has been cut.