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| Number | Title | Issue Date |
| 7427091 | Spear head overshot for use in a cable guided fishing assembly 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 se... | 09/23/2008 |
| 6244642 | Retrievable bridge plug and retrieving tool A retrievable bridge plug having an internal bypass passage and external retrieving lugs, and a retrieving tool therefor. When the bypass passage is sealed, both the top and bottom openings of the bypass passage are closed, preventing debris from entering... | 06/12/2001 |
| 6059336 | Hydraulically actuated mechanical coupler A connector unit is disclosed which comprises a shaft, a plurality of collet fingers, and a sleeve. The plurality of collet fingers are peripherally positioned against the generally cylindrical outside surface of the shaft adjacent the lower end of the sh... | 05/09/2000 |
| 5887925 | Combined washover and retrieval device A combined washover and retrieval device (30, 30A) for connection to the lower end of a tubular string (14, 14A) including an outer washover pipe (22, 22A) and an inner retrieval tool (36, 36A). Retrieval tool (36, 36A) includes an upper sub (30, 30A) sec... | 03/30/1999 |
| 5810410 | Combined washover and retrieval device A combined washover and retrieval device (30, 30A) for connection to the lower end of a tubular string (14, 14A) including an outer washover pipe (22, 22A) and an inner retrieval tool (36, 36A). Retrieval tool (36, 36A) includes an upper sub (30, 30A) sec... | 09/22/1998 |
| 5580114 | Hydraulically actuated fishing tool A fishing tool is disclosed which is responsive to hydraulic pressure to move away support for collets to allow the collects to deflect and make contact with the stuck object. Upon removal of the hydraulic force, the support for the collets is returned, p... | 12/03/1996 |
| 5375897 | Well pipe elevator for well drilling A well pipe elevator comprises a ring having an interior volume and adapted to be fitted over a pipe from above and one or more tongues carried by the ring. The tongue mounted for movement between a retracted position (I) for fitting the elevator to the p... | 12/27/1994 |
| 5149163 | On and off fishing tool A fishing tool for composite sucker rod has a four fingered collet. An overshot tube is connected to the top of the fishing tool. The top of the collet has a stack telescoped within a helical spring. A fish deep within a well has a splintered partial join... | 09/22/1992 |
| 5024277 | Running tool for use in well bores A running tool and method for the use thereof in locating apparatus in a well bore includes an elongated hollow tool body and outer sleeve encircling the body; a mandrel disposed within the body and sleeve and carrying a collet on the lower end thereof wh... | 06/18/1991 |
| 5005650 | Multi-purpose well head equipment A guide base for a sub-sea well is formed in two parts, an annular portion fixed to a conductor housing and a retrievable portion surrounding and releasably attached to the annular portion. The retrievable portion can be recovered and used elsewhere if a ... | 04/09/1991 |
| 4945985 | Pipe down-hole retrieval tool A pipe and pump retrieval tool 10 is described for removing a disconnected or "lost" pipe and pump assembly 20 from the bottom 16 of a well 12. The retrieval tool 10 includes elongated body 40 illustrated in FIGS. 2, 6 and 8 extending from a lower end 42 ... | 08/07/1990 |
| 4883120 | Latching tool for retrieving wellbore devices A latching tool for retrieving downhole well instruments and devices is adapted to be connected to the lower end of a tubing string for movement for movement to engage a fishing head connected to the instrument or device to be retrieved from the wellbore.... | 11/28/1989 |
| 4856582 | Motorized wellbore fishing tool A motor operated fishing and setting tool for wellbore instruments and apparatus includes a tubular body member, a lower guide member having a conical surface formed therein and an inner sleeve with an elongated bore for receiving a fishing head. The fish... | 08/15/1989 |
| 4801167 | Downhole well fishing assembly A fishing assembly for use in retrieving a separated or broken sucker rod from a well comprising a body member having a cavity in which a slide member is disposed therein for reciprocation within the body member. An entrance port is formed in the lower en... | 01/31/1989 |
| 4700775 | Dual-action retrieving tool for oil well swabs Apparatus and method for a tool that will retrieve either an oil well swab or the down-hole stand which limits the working depth of the swab.... | 10/20/1987 |
| 4591197 | Wire line running and/or pulling tool These are disclosed three embodiments of a wire line tool for use in running and/or pulling a well tool within a well bore. In each embodiment, latches are carried about a body of the wire line tool and yieldably urged from inner positions, in which their... | 05/27/1986 |
| 4585369 | Mechanical connection means This connection means comprises a male connector (1) with a circular groove (5) and a female connector comprising a body (2), a cap (3) and a sleeve (4). The cap (3) hangs from the bottom end of body 2 within which it is able to partly slide. The cap has ... | 04/29/1986 |
| 4573726 | Hoisting apparatus for electric submersible pump units A hoisting apparatus for submersible pump units (4), which is provided particularly for use in deep shafts, comprises a flexible traction element, a drive means for hoisting and lowering the traction element, and a coupling part (1) arranged at the lower ... | 03/04/1986 |
| 4548437 | Downhole well fishing assembly A fishing tool comprising a body member having an offset entrance port into a cylindrical cavity that contains a slide member having a trough-shaped lower portion positionable adjacent the entrance port in either of two diametrically opposed angular posit... | 10/22/1985 |
| 4476086 | Coupler for nuclear reactor absorber rods Coupler for absorber rods being suspended during operation of nuclear reactors including a plurality of actuating elements being movable for individually and jointly releasing the coupler, the movement of each of the actuating elements for releasing the c... | 10/09/1984 |
| 4436334 | Releasing overshot apparatus In accordance with an illustrative embodiment of the present invention, a releasing and retrieving apparatus for a pack-off tool used in pipe testing operations includes a tubular body having slots in the walls thereof, each slot having an inclined surfac... | 03/13/1984 |
| 4382623 | Apparatus for retrieving fluid plug A method and apparatus are disclosed for sequentially treating two vertically separated zones in a well bore, utilizing a packer having a fluid passageway therethrough set between the zones, a pressure shearable plug at the lower end of the packer, and a ... | 05/10/1983 |
| 4061389 | Combination wire line releasable overshot and pull tool A wire line oil tool adapted for multiple connectors on the bottom. It can be used as an overshot, a fishing neck grapple or an inside grapple. It incorporates an outer body which is annular about a central member. A catch mechanism locks the outer body u... | 12/06/1977 |
| 4017113 | Electrical cable overshot-grappling tool An overshot-grappling tool adapted to be lowered, raised and manipulated to retrieve sections of electrical cable from a well, wherein a plurality of flexible gripping fingers are provided for gripping a termianl connector of the electrical cable section ... | 04/12/1977 |
| 4004835 | Overshot An improved overshot for grappling a fishing neck is disclosed. A fishing neck has an undercut shoulder with a protruding enlarging thereabove. This disclosure is directed to an overshot having an upper body and a fixed inner tubular sleeve. The tubular s... | 01/25/1977 |
| 3950021 | Pulling and running tool In accordance with an illustrative embodiment of the present invention as disclosed herein, a wireline pulling and running tool can be preset at the surface by simple adjustment for functioning as either a pulling or a running tool, and for release from a... | 04/13/1976 |
| 3930679 | Dry hole wire core barrel apparatus Wire line core barrel apparatus that includes a wire line core barrel inner tube assembly movable through a drill stem to be seated in a latched core taking position adjacent the drill stem core bit, and a main overshot assembly that is coupled to a lower... | 01/06/1976 |
