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| Number | Title | Issue Date |
| 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 |
| 7131494 | Screen and method having a partial screen wrap The present invention provides a screen for a well that utilizes a partial screen wrapping used to advantage with side conduits (e.g., alternate flowpaths), control lines, intelligent completions devices, and the like. It is emphasized that this abstract is provided... | 11/07/2006 |
| 6966368 | Plug and expel flow control device Devices and methods for fluid flow control within a production tubing string wherein a temporary flow blockage is established and selectively removed from the tubing string so that pressure testing or operation of a hydraulic tool within the string may be performed.... | 11/22/2005 |
| 6948561 | Indexing apparatus An indexing mechanism is disclosed that can put a tool in a variety of positions while downhole in the face of high static and dynamic loads. In the preferred application, the mechanism controls a movable sleeve on a downhole choke. It contains an indexing feature c... | 09/27/2005 |
| 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 |
| 6056061 | Apparatus for completing a subterranean well and associated methods Apparatus for completing a subterranean well and associated methods provide economical and efficient well completions. In one described embodiment, a well completion apparatus includes a packer which is settable by application of a compressive axial force... | 05/02/2000 |
| 5826652 | Hydraulic setting tool A packer is disclosed having a setting piston mounted on the body thereof. The packer is hydraulically set prior to treating or cementing. The packer has a sliding sleeve valve which is open during run-in. After the packer has set, the setting tool is rel... | 10/27/1998 |
| 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 |
| 5355953 | Electromechanical shifter apparatus for subsurface well flow control A subsurface well flow control system includes a series of movable sleeve type flow control devices installed in a well flow conductor at various fluid-containing fracture zones, and a shifter tool movable through the conductor and operable to selectively... | 10/18/1994 |
| 5318117 | Non-rotatable, straight pull shearable packer plug A two-way retrievable packer plug is installed in the production bore of a flow conductor by straight insertion, and is retrieved by a one trip straight pull operation. The plug assembly includes a core mandrel which is enclosed within a tubular latch man... | 06/07/1994 |
| 5297629 | Drill stem testing with tubing conveyed perforation A well test string includes an annulus pressure responsive tester valve and a tubing conveyed perforating gun including a tubing pressure actuated time delay firing mechanism. A compression set packer is disposed in the test string between the tester valv... | 03/29/1994 |
| 5261492 | Well casing apparatus and method The present invention provides an apparatus for casing a well. The inventive apparatus comprises: an outer casing; an inner casing positionable inside the outer casing; and a squeeze packer assembly incorporatable in the inner casing. The squeeze packer a... | 11/16/1993 |
| 5224540 | Downhole tool apparatus with non-metallic components and methods of drilling thereof 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 slip components. The non-metallic material may include engineering grade plastics. In one em... | 07/06/1993 |
| 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 |
| 4842057 | 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... | 06/27/1989 |
| 4687063 | Well cementing method and apparatus A cementing apparatus is shown for use with a wireline run setting tool. The apparatus includes a retainer with external gripping and sealing members for sealing off a lower region of the well below the sealing members. The cement retainer has a plurality... | 08/18/1987 |
| 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 |
| 4590995 | Retrievable straddle packer An improved retrievable compression set straddle packer assembly for use in oil and gas wells. The straddle packer assembly comprises an hydraulic slip assembly, an injection mandrel assembly, a packer assembly, a mechanical slip assembly, a drag block as... | 05/27/1986 |
| 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 |
| 4436149 | Hydraulic setting tool Apparatus for setting in a bore a well tool of the type having radially expandable anchor means and a mandrel-actuated slidable valve for permitting flow through the tool. Inner and outer sleeves are telescopically interengaged for suspension from a condu... | 03/13/1984 |
| 4372388 | Subsurface control valve A subsurface control valve for use in shutting off a well bore. The valve comprises a valve assembly and a stinger assembly, which is run into the well bore on drill pipe with a packer placed below the valve in the string. The valve is open as the string ... | 02/08/1983 |
| 4372390 | Well valve Disclosed are apparatus and method of closing a conduit against fluid flow in at least one longitudinal sense, and selectively disengaging and reengaging the closure mechanism without removing the closure mechanism from the conduit. In a particular embodi... | 02/08/1983 |
| 4349071 | Cement retainer and setting tool assembly A well tool assembly comprising a drillable cement retainer and setting tool includes a connection between a setting-tool mandrel and a retainer mandrel allowing for opening and closing of a cement valve in the retainer without disconnecting the setting t... | 09/14/1982 |
| 4295524 | Isolation gravel packer A method and apparatus for gravel packing a producing formation or zone in a well without inducing fluid movement across the zone being packed during reverse circulation. Packing and reverse circulation are effected without any movement of the tool string... | 10/20/1981 |
| 4270608 | Method and apparatus for gravel packing multiple zones A method of gravel packing multiple zones with a single trip of the operating string into a well without inducing fluid movement across zones, and without disturbing the zone being packed in reverse circulation. Apparatus is disclosed to perform the metho... | 06/02/1981 |
| 4253521 | Setting tool The present invention provides a setting tool having a tubular sleeve assembly. An upper mandrel is disposed within said sleeve assembly and interconnected therewith by a rotational screw jack means. A lower mandrel is connected to the upper mandrel by a ... | 03/03/1981 |
| 4192375 | Gravel-packing tool assembly An improved gravel-packing tool assembly with a baffled stinger pipe for gravel-packing a perforate liner having substantially the same internal diameter as the casing string extending from the perforate liner to the earth surface. A perforate nipple and ... | 03/11/1980 |
| 4164977 | Well latch Disclosed is a well latch for locking well tools in a well flow conductor. The latch housing has a pressure equalizing passage extending through its wall. A valve controls flow through the equalizing passage. Keys, carried by the latch housing, are expand... | 08/21/1979 |
| 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 |
| 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 |
| 3931855 | Downhole packer actuated vent assembly A packer actuated vent assembly comprising a packer device settable by reciprocal movement of a mandrel, a valve actuator in the form of a barrel attached to the packer body, and a mandrel extension having a valve means thereon attached to the packer mand... | 01/13/1976 |
