Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7249633 | Release tool for coiled tubing A bottom hole assembly for use with fracturing or fracing a wellbore using coiled tubing is described having a first packing element and a second packing element on a mandrel. The bottom hole assembly may be run into the wellbore such that the packing elements strad... | 07/31/2007 |
| 7096951 | Method and apparatus for retrieving an object from a well bore A fishing tool apparatus for retrieving an object from within a well bore, wherein the object has an opening for receiving the apparatus, comprises a support rod, an expandable sleeve, and a biasing means. The expandable sleeve may be externally threaded for engagin... | 08/29/2006 |
| 7036595 | Removal of tubulars from wells Slips slidably disposed on a mandrel for lowering into a well inside a tubular to be removed from the well move outwardly to engage the tubular upon withdrawing the mandrel carrying the slips from the well. In one implementation there is a conical surface such that ... | 05/02/2006 |
| 7021382 | Downhole axial force generating tool An axial force generating tool for applying a force on a structure positioned within a borehole is taught. The tool includes a housing (19) sized to fit within the borehole in which the tool is required to act; an outer seal (38) disposed about the hou... | 04/04/2006 |
| 6997493 | Lockable overshot 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 th... | 02/14/2006 |
| 6196309 | Down hole pulling tool and method of use An apparatus for pulling objects from a well is described. The apparatus may comprise an elongated housing having an internal chamber. The housing will be connected to a work string such as wireline or coiled tubing. A skirt is attached to the housing, wi... | 03/06/2001 |
| 5782297 | Retrieval tool for back pressure valve and tree test plug A retrieval tool for retrieving a back pressure valve and tree test plug (generally, a check valve) has a spear formed as a solid ring at the bottom with free fingers extending upward. The fingers are resilient and have protrusions adapted to engage a ret... | 07/21/1998 |
| 5474124 | Wellhead retrieval tool assembly A wellhead retrieval tool assembly for retrieving a check valve has a spear formed as a solid ring at the bottom with free fingers extending upward. The fingers are resilient and have protrusions adapted to engage a retrieval groove in the check valve. A ... | 12/12/1995 |
| 5470118 | Shear device for well service tools A shear device for a well service tool which is suspended from a sandline into a producing well and which device includes a plurality of shear rods which can be interchangeably connected between coupling members at opposite ends of the shear device and an... | 11/28/1995 |
| 5398753 | Wireline hydraulic retrieving tool and downhole power generating assembly In wireline operations, it is known to retrieve objects stuck in a well bore by means of a retrieving force applied to the object through the wireline and a wireline pulling tool attached to the wireline and engaged with the object. The present invention ... | 03/21/1995 |
| 5265927 | Downhole fishing tool A sucker rod coupling retrieval tool which includes a cylindrical slip bowl having an axially offset cylindrical bore in one end. The opposite end is threaded onto the lower end of a top sub which defines an internal bore receiving an annular bearing. A s... | 11/30/1993 |
| 5228507 | Wireline hydraulic retrieving tool In wireline operations, it is known to retrieve objects stuck in a well bore by application of a retrieving force applied to the object through the wireline and a wireline pulling tool attached to the wireline and engaged with the object. The present inve... | 07/20/1993 |
| 5197773 | Running and pulling tool An improved running or pulling tool which automatically connects to a lock mandrel when the improved tool dogs are inserted into a lock mandrel fishing neck. The dogs are releasably positioned for automatic connection by lower shear members. The tool is r... | 03/30/1993 |
| 5158142 | Apparatus for releasing a pipe string from an object stuck downhole by continuously applying tension to said apparatus A tension actuated device is adapted to be connected between a pipe string and an object stuck downhole in a wellbore and does not disconnect the pipe string from the object in response to a transient or temporary shock load that is temporarily applied to... | 10/27/1992 |
| 5145228 | Running and pulling tool A running and pulling tool is disclosed which is releasably connectible to a fishing neck on a well tool. The running pulling tool has an elongate mandrel on which a connector having dogs is slidably mounted for connecting to and releasing the dogs from a... | 09/08/1992 |
| 5066060 | Running tool A running tool useful for installing lock mandrels and other subsurface wireline tools in a well bore, the running tool comprising top sub (12), retainer sleeve (14), bottom setting sleeve (16), core (18), insertion sleeve (44) and lockout sleeve (66). Ru... | 11/19/1991 |
| 4848820 | Wireline running and pulling tool A wireline tool 10 is capable of permitting either a downwards hammer action for release when its top sub 12 is connected to its housing 30, or an upwards hammer action for release when its top sub is connected to its core 26, and is capable of attachment... | 07/18/1989 |
| 4838594 | Running and pulling tool Two embodiments of an improved tool, which may be used as a running tool or a pulling tool for well tools. The improved structures provide running pulling tools which may be jarred upwardly on or jarred downwardly on as long as required after engaging a t... | 06/13/1989 |
| 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 |
| 4793411 | Retrievable gravel packer and retrieving tool A retrievable gravel packer and retrieving tool therefor. The gravel packer includes an inner mandrel assembly attached to an operating tool by a left-hand threaded connection. The packer is set without rotation by the operating tool to move a pusher slee... | 12/27/1988 |
| 4767145 | Running and pulling tool An improved running pulling tool utilizing dogs for engaging an internal fishing neck on a well tool. The dogs are locked in fishing neck engaging position on the tool mandrel and are unlocked by jarring downwardly, upwardly and again downwardly and moved... | 08/30/1988 |
| 4697790 | Pulley hoists Pulley hoists are disclosed which provide moving anchor hooks that are suspended by two "pulls" of rope, and which may be fabricated by a single part. Anchor hooks are also disclosed which have multiple, independently movable hook portions so that certain... | 10/06/1987 |
| 4696502 | Dual string packer mill A dual string packer is milled by a mill having an annular milling shoe for milling the periphery of the packer and freeing it from the well bore. An axial milling head mills a central hole in the top of the packer before the annular shoe reaches the lock... | 09/29/1987 |
| 4616721 | Packer Mill A milling tool for removing a packer from a well includes a releasable catcher for supporting remains of a milled packer (51). The catcher has a sleeve (26) with deflectable fingers (29) which normally support the remains of the packer. If the packer shou... | 10/14/1986 |
| 4558895 | Pulling tool A pulling tool for retrieving well tools from a well bore. The present invention allows the reach of the pulling tool to be easily varied. The pulling tool can also be assembled for emergency release by either upward or downward shearing forces. The weigh... | 12/17/1985 |
| 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 |
| 4488596 | Locking apparatus for use in a subterranean well An apparatus for locking a tool into an annular groove formed on the interior of a subterranean well includes a segmented lock ring expandable into the groove by axially shiftable tapered keys wedged between segments of the ring. A latch collet between th... | 12/18/1984 |
| 4379488 | Latch for well tool An improved latch device for releasably locking in a recess in a well flow conductor. The latch is attachable to a well tool which may be positioned and operated to latch and lock in and later be retrieved from the flow conductor using wireline or TFL pum... | 04/12/1983 |
| 4332410 | Retrieving tool for well packer A retrieving tool is provided for effecting the retrieval of a packer from a well and includes a locking member, such as a conventional locking collet having expandable fingers for sliding over a downwardly facing shoulder on a seal nipple secured to the ... | 06/01/1982 |
| 4317485 | Pump catcher apparatus A pump catcher apparatus is provided for supporting within a subterranean well a portion of a tubular conduit and a pump depending from the conduit. The apparatus comprises a control mandrel and a main body extending from the control body. Slip elements a... | 03/02/1982 |
| 4185865 | Releasable wireline overshot An overshot adapted to engage and disengage a fishing neck in a well bore. The apparatus comprises an overshot body, a set of collet fingers which deflect radially and have a surface to grasp a fish in a well bore, a tapered surface abutting the collet fi... | 01/29/1980 |
| 4181344 | Running tool Disclosed is a running tool for running sensitive well equipment into a well. Once the well equipment has been landed in the well, the running tool releases therefrom upon the application of a steady force. This abstract of the disclosure is neither inten... | 01/01/1980 |
| 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 |
| 4127297 | Releasable overshot A wireline operated overshot is disclosed. In the illustrated embodiment, the overshot includes a grapple which is located internally of a sleeve telescoped about it having a tapered internal shoulder. The grapple engages and disengages a fish. In the eve... | 11/28/1978 |
| 4035011 | Soft set running tool A well running tool used for lowering and setting well bomb hangers and various tool string hangers in a well and then disengagement for removal from the well, leaving the hanger set in place in the well. It is a soft set running tool designed to disengag... | 07/12/1977 |
| 3960399 | Setting and retrieval device for down-hole equipment A setting and retrieval device for down-hole equipment which includes a solid mandrel tapered at its bottom to a larger diameter which cooperates with a set of surrounding collet fingers which have a shoulder and gripping threads thereon to engage a fish ... | 06/01/1976 |
| 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 |
| 3942833 | Running tools A running tool for setting and retrieving well devices in and from wells having a mandrel reciprocable in its axial bore and slips suspended from the mandrel for reciprocation therewith into and out of supporting engagement with a well device, the bore in... | 03/09/1976 |
