Class 294/86.1 - Well type

Subclass of Class 294 - Handling: hand and hoist-line implements
Definition: Grapples that are intended to be used in a well, the grapple
No. of patents: 24
Last issue date: 07/24/2007

Number	Title	Issue Date
7246663	Positive engagement indicator for wireline fishing operations A device and method for retrieving a tool string from downhole locations through the use of one or more engagement sensors. The one or more engagement sensors are activated by the tool string engaging an overshot device. The one or more engagement sensor may be mech...	07/24/2007
6615919	Well pipe extraction apparatus A well pipe extraction apparatus for removing a groundwater monitoring well consisting of PVC pipe from the ground. The well pipe extraction apparatus includes a wire rope, a soft eye formed at an upper end of the wire rope and knurled brass rod attached ...	09/09/2003
6045171	Spear head assembly A spear head assembly (10) comprises a main body portion (14) with axially opposite first and second ends (16 and 18) respectively. The first end (16) is adapted for threaded connection with a down hole tool (12). The tool, which does not form part of the...	04/04/2000
5967236	Spill control plug and method A spill control plug is arranged to be selectively inserted into and removed from tubing while the tubing is being tripped into or out of a well to contain the fluids therein....	10/19/1999
5279482	Fingered bola body, bola with same, and methods of use A bola body, a bola, and methods employing such bola bodies and bolas; in one aspect a bola body having a non-spherical body member from which extend one or more fingers for entanglement with a bola line, with each other, or for latching onto part of a ta...	01/18/1994
5141275	Drill rod retrieval device A drill rod retrieval device for recovering hollow drill rods that are connectable end to end by coupling means from a drill shaft. The device comprises an internally threaded female section formed within the hollow interior of each of the drill rods and ...	08/25/1992
5106140	Oil-field wireline fishing tool The present invention is an oilfield wireline fishing tool with expansible wings. The wings open up in umbrella fashion after leaving production tubing allowing the fishing tool to cover the entire diameter of the well casing. Upon reentry into tubing the...	04/21/1992
4995458	Wear bushing retrieval tool A tool for use in retrieving a wear bushing from a wellhead assembly comprising a generally annular body portion which can be located around a length of casing, means for supporting the body portion relative to a length of casing so that it can be lowered...	02/26/1991
4813730	Retrieval device for a well control tool A latching device for locking and removal of a flow control device from a mandrel receiver comprises a cylindrical stem, a locking sleeve slidably mounted upon the stem, an annular locking ring mounted for a limited axial movement along the lower portion ...	03/21/1989
4625381	Floating wear bushing retriever apparatus An apparatus which provides for a sub-body having a mandrel with a longitudinal bore therethrough having a rigidly attached upper collar section for engagement onto a section of pipe or the like, and having a threadably removable lower collar section for ...	12/02/1986
4537435	Downhole retrieval tool A downhole retrieval tool to recover lost wire or cable from a well. The tool has an elongated body with a smooth outer wall. A notch is formed in the wall to receive a wire to be retrieved. Within the body and operable in the notch is a latch member to t...	08/27/1985
4488747	Method and fishing tool apparatus for recovering objects from wells This invention relates to fishing tools for first determining the orientation of an object before retrieving said object from a well, well bore, casing, and the like. It comprises a base with a plurality of electrode welding tips retractably attached ther...	12/18/1984
4483563	Device for handling an object such as a pipe or pile A device for handling an object such as a pipe comprising a cylindrical member, with four disposed adjacent one another elongate grooves or recesses in the peripheral direction in the surface thereof and extending in upward direction, with the first and l...	11/20/1984
4445719	Release mechanism for a cylindrical object recovery device A release mechanism is provided for a structural member, such as a cylindal object recovery device, wherein the structural member has top and bottom sides. The release mechanism includes a block which is attachable to the structural member so as to exten...	05/01/1984
4397494	Fishing tool to retrieve cables from wells A fishing tool to snag and to retrieve cables from wells. The tool includes an elongated body which has two ends, a substantial length, and peripheral boundary of lesser lateral dimensions than a well down which the tool is to be sent with the first of it...	08/09/1983
4361353	Method and apparatus for retrieving wear bushings of various diameters The present invention relates to a method and apparatus for retrieving wear bushings of various diameters and configurations with a single retrieving tool. The apparatus comprises an elongated member having first and second ends and having a generally cyl...	11/30/1982
4353585	Fishing tool to retrieve cables from wells A fishing tool to snag and to retrieve cables from wells. The tool includes an elongated body which has two ends, a substantial length, and peripheral boundary of lesser lateral dimensions than a well down which the tool is to be sent with the first of it...	10/12/1982
4273464	Wire line anchor A wire line anchor has a slot in its side wall that will move the slot into position to engage a key attached to a housing in a pipe string to hold the anchor against upward movement relative to the housing. The anchor is released from the key by subseque...	06/16/1981
4225173	Cable retrieving tool A cable retrieving tool has helically arranged blades periodically terminating in teeth. Once the cable to be retrieved is engaged the tool is rotated as it is lowered to more securely grapple the cable by the teeth before it is withdrawn from the well....	09/30/1980
4157199	Apparatus for retrieving a tubular member from a well Apparatus for grasping the exterior surface of a tubular member to facilitate removal thereof from within a well is characterized by a substantially hollow, elongated housing having first and second flapper members pivotally mounted within the housing for...	06/05/1979
4156471	Rubble and core removal apparatus A rubble and core removal apparatus including a casing, open at one end, with spirally extending flighting disposed therein, the flighting being secured to the inner wall of the casing and extending radially inwardly thereof in changing dimension, the cas...	05/29/1979
4108245	Well cable stop for stripping operations A tubular sleeve structure defining an upwardly opening socket and including peripherally spaced inwardly retractable and spring biased outwardly projecting stop lugs is provided for positioning above and downward abutting engagement with a stop sleeve se...	08/22/1978
4062485	Exothermic welding device Exothermic welding device for welding to a surface underwater includes a Thermit charge surrounded by a movable inner casing abutting a plate. The plate includes magnetic or other means for attaching the device to the surface to be welded. Urging means fo...	12/13/1977
3944273	Retrieving tool for wellhead packing A retrieving tool has resilient fingers engageable with a pulling collar of the actuator ring of a wedge locked underwater wellhead packing to release the lock and the packing for retrieval from the wellhead. The retrieving tool has a body connected to a ...	03/16/1976

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Class 294/86.1 - Well type