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| Number | Title | Issue Date |
| 7222669 | Method of repair of collapsed or damaged tubulars downhole A method of repairing tubulars downhole is described. A swage is secured to a force magnification tool, which is, in turn, supported by an anchor tool. Applied pressure sets the anchor when the swage is properly positioned. The force magnification tool strokes the s... | 05/29/2007 |
| 7172029 | Bi-directionally boosting and internal pressure trapping packing element system The present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bidirectional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a ... | 02/06/2007 |
| 7163066 | Gravity valve for a downhole tool A gravity valve for a downhole tool for use in a subterranean well and a method of use thereof. The gravity valve is adapted to control the flow of a dowuhole fluid through the downhole tool. The gravity valve typically includes a plunger and a seat. The plunger may... | 01/16/2007 |
| 7114574 | By-pass valve mechanism and method of use hereof A by-pass valve mechanism for a well treatment tool having at least one flow sensitive element, permitting by-pass of well fluid past the flow sensitive element of the well treatment tool during conveyance of the well treatment tool to treatment depth within a well.... | 10/03/2006 |
| 6902008 | Bi-directionally boosting and internal pressure trapping packing element system Present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bi-directional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a top... | 06/07/2005 |
| 6702015 | Method and apparatus for deploying power cable and capillary tube through a wellbore tool A technique to facilitate deployment of power cable and at least one capillary tube through a wellbore tool, such as a packer. The technique allows both the power cable and the at least one capillary tube to extend through a single pass-through opening in... | 03/09/2004 |
| 6578638 | Drillable inflatable packer & methods of use Methods for reclaiming a borehole extending from an earth surface into the earth, part of which borehole is in a lost circulation zone. The methods include the steps of closing off the borehole to fluid flow above the lost circulation zone by installing a... | 06/17/2003 |
| 6152224 | Downhole apparatus Apparatus for use in setting packers and other fluid actuated devices includes a tubular body (222), a valve (228) for controlling the flow of well fluid through a port (234) in the body (222) and a valve actuator (224) mounted on the body (222) and movab... | 11/28/2000 |
| 6142226 | Hydraulic setting tool Apparatus and associated methods are provided which facilitate underbalance drilling and completion of wells. In a described embodiment of a well control valve, the valve is opened and closed when a drill string is displaced therethrough. A shifting devic... | 11/07/2000 |
| 5746274 | One trip cement and gravel pack system An apparatus and method is provided that allows an operator to drill a well into a formation requiring treatment or gravel packing in a single pass, then to lower and position the liner and production strings simultaneously. The invention allows cementing... | 05/05/1998 |
| 5595246 | One trip cement and gravel pack system An apparatus and method is provided that allows an operator to drill a well into a formation requiring treatment or gravel packing in a single pass, then to lower and position the liner and production strings simultaneously. The invention allows cementing... | 01/21/1997 |
| 5404956 | Hydraulic setting tool and method of use A hydraulic setting tool for setting a packer with a sliding valve therein in an operating position in a well bore. The setting tool comprises an outer housing portion slidably disposed with respect to an inner mandrel portion. A piston is connected to th... | 04/11/1995 |
| 5390737 | Downhole tool with sliding valve A downhole tool apparatus and methods of drilling the apparatus. The apparatus may include, but is not limited to, packers and bridge plugs utilizing non-metallic components. The non-metallic components may include but are not limited to the center mandre... | 02/21/1995 |
| 5174379 | Gravel packing and perforating a well in a single trip A new gravel packing system is provided whereby a well may be perforated, gravel packed and placed on production with a single trip of the tool string into the well. The system will include a crossover assembly which has a closure mechanism operatively as... | 12/29/1992 |
| 5146994 | Packing assembly for use with reeled tubing and method of operating and removing same A packing assembly which is connectable to reeled tubing and which can be inserted in and pushed through a wellbore tube by the reeled tubing. The packing assembly is hydraulically set in a locking and sealing position in the wellbore by fluid introduced ... | 09/15/1992 |
| 5029643 | Drill pipe bridge plug A retrievable bridge plug apparatus, and associated methods, are provided for sealing the bore of a drill pipe string to control a well that is flowing out of control.... | 07/09/1991 |
| 5000265 | Packing assembly for use with reeled tubing and method of operating and removing same A packing assembly which is connectable to reeled tubing and which can be inserted in and pushed through a wellbore tube by the reeled tubing. The packing assembly is hydraulically set in a locking and sealing position in the wellbore by fluid introduced ... | 03/19/1991 |
| 4915175 | Well flow device A sliding sleeve valve well flow control device having a tubular nipple connectable in a well tubing string and side ports for flow into the nipple and a retrievable pack-off sleeve insertable into the nipple for closing the side ports, the sleeve includi... | 04/10/1990 |
| 4856583 | Apparatus for treating well bores Treating apparatus arranged to be positioned in well bores that includes a packer that is retrievable and resettable and that provides a spaced pair of sealing elements to isolate a zone in the well bore. A valve operable within the packer is moveable amo... | 08/15/1989 |
| 4823881 | Hydraulic setting tool A hydraulic setting tool for packers. The setting tool comprises a case with a ball valve therein, a bypass passageway for bypassing around the ball valve when the ball valve is in a closed position, a fill valve for closing the bypass passageway when des... | 04/25/1989 |
| 4722400 | Mechanically actuated subsurface injection tool An injection tool for use in injecting fluids into perforations of a production formation of an oil or gas well is mechanically set in the bore of the casing traversing the production formation, and mechanically releasable therefrom so that chemical treat... | 02/02/1988 |
| 4635716 | Gravel packer The present invention comprises a weight-set single-zone gravel packer which may be retrieved from a gravel screen after gravel packing or, alternatively, left in place attached to the screen as a production packer. The gravel packer includes a compressio... | 01/13/1987 |
| 4633943 | Gravel packer The present invention comprises a retrievable gravel packer for circulation and squeeze type gravel packing. The gravel packer includes a compression-set packer element, a J-slot assembly to releasably maintain the gravel packer in an unset mode, a ratche... | 01/06/1987 |
| 4605062 | Subsurface injection tool An injection tool for use in injecting fluids through perforations in the well bore of an oil or gas well is mechanically set and mechanically releasable. Fluid can be injected between upper and lower packing elements into a selected perforation. The uppe... | 08/12/1986 |
| 4583593 | Hydraulically activated liner setting device A system is provided for gravel-packing a zone of a well. The system includes a liner hanger setting apparatus for setting a liner hanger located below the apparatus within the well. The liner hanger setting apparatus includes a housing having a housing b... | 04/22/1986 |
| 4522264 | Apparatus and method for treating wells Improved apparatus for packing particulates such as sand, gravel, or the like, around a well screen in a well for sand control, the apparatus having provisions for packing the particulates tightly in place without relying on settling due to gravity, thus ... | 06/11/1985 |
| 4519451 | Well treating equipment and methods Improved equipment and methods for treating wells by processes such as acidizing, gravel packing, and the like, wherein provision is made for removing the excess acid, gravel, and the like, from the well while the work string or pipe, on which the equipme... | 05/28/1985 |
| 4460041 | Subterranean well tool with pressure equalizing release A retrievable well tool for use in a subterranean well utilizes plural valving elements to establish a fluid by-pass around an annular elastomeric sealing element in response to either downward or upward movement of a control mandrel. The fluid by-pass es... | 07/17/1984 |
| 4436150 | Bridge plug An inner mandrel extends the full length of the bridge plug, and carries a top sub at its upper end for latching engagement with a conventional overshot to retrieve the plug. A tubular outer mandrel is slidably mounted on the inner mandrel for limited axi... | 03/13/1984 |
| 4432417 | Control pressure actuated downhole hanger apparatus A hanger and valve assembly which can be employed as a safety valve assembly to close both the production tubing and the tubing-casing annulus in a subterranean well is disclosed. The assembly includes a hydraulically activated, mechanically locked hanger... | 02/21/1984 |
| 4401158 | One trip multi-zone gravel packing apparatus An apparatus is provided for gravel packing a plurality of zones within a subterranean well. Primary sealing means are adapted for setting in casing at a position above the zones. A plurality of sets of production screens and valve means are provided, the... | 08/30/1983 |
| 4385664 | Frangible cup thermal packer assembly for cased wells A subsurface wellbore completion assembly for a cased well is disclosed. The assembly includes thermal cup packers which may be set at a subsurface location along the well above a hot fluid injection zone. The assembly is run into the well on a tubing str... | 05/31/1983 |
| 4350205 | Work over methods and apparatus Methods and apparatus for isolating the producing zone of a well during workover operations, particularly where the well is equipped with a production string and a submersible electric pump suspended thereon. A packer and isolation valve are set in the we... | 09/21/1982 |
| 4284137 | Anti-kick, anti-fall running tool and instrument hanger and tubing packoff tool An instrument hanger for use in tubing is disclosed with an anti-kick, anti-fall running tool. In one embodiment, the tool includes an internal mandrel, an external sleeve, with the mandrel being tapered wherein the external sleeve supports upwardly point... | 08/18/1981 |
| 4258787 | Subterranean well injection apparatus An apparatus is provided for injecting fluid within the bore of a subterranean well. The fluid is transmitted through the bore above the apparatus through parallel fluid flow conduits. A packer assembly communicates to the fluid flow conduits and is carri... | 03/31/1981 |
| 4127168 | Well packers using metal to metal seals An improved well packer for use in sour gas wells is disclosed. The improved packer includes a cylindrical mandrel encircled with a resilient metal seal ring, means for anchoring the packer at a predetermined vertical depth, means for radially expanding t... | 11/28/1978 |
| 4050512 | Stroke actuated well testing tool A stroke actuated well testing tool carried by a tubing string and including a packer, radial ports for maximum internal flow past the packer, and a valve controlling flow through the tubing string; the tool further including radial port control assemblie... | 09/27/1977 |
| 4049055 | Gravel pack method, retrievable well packer and gravel pack apparatus The assembly is supported and operated by a tubing string and includes an hydraulically set packer carrying a production screen and a removable gravel pack apparatus. The packer is set, gravel is packed about the screen and the gravel pack apparatus is th... | 09/20/1977 |
| 3990510 | Releasable well anchor tool A releasable well anchor adapted to be set on a wire line with a running tool attached which comprises an internal and an external mandrel which are slidably mounted with respect to one another having a set of slips on the exterior which slips have two po... | 11/09/1976 |
