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| Number | Title | Issue Date |
| 7770637 | Bypass gas lift system and method for producing a well The completion system for delivering lifting gas supplied from surface via a casing annulus thru the packer for injecting to the wellbore at bottom hole as lifting gas for maximizing hydrocarbon producing from a subterranean well while maintaining integrity and serv... | 08/10/2010 |
| 7472746 | Packer apparatus with annular check valve A well packer assembly with an annular fluid bypass and a check valve. The well packer assembly has an upper packer apparatus and a lower packer apparatus with a stimulation port therebetween. An annular fluid bypass in the upper packer apparatus communicates the we... | 01/06/2009 |
| 7328742 | Seal cup for a wellbore tool and method A seal cup and method is disclosed that can be used on a wellbore tool. The seal cup includes an external circumferential seal land adjacent the cup lip and an outer surface capable of permitting drainage away from the seal land of fluids, which may seep past the se... | 02/12/2008 |
| 7204305 | System and method for installing a liner in a borehole A system and a method for installing a liner conduit in a borehole. The system includes a packer assembly, a running tool or a packer assembly and a running tool. The method uses a packer assembly and a running tool for installing a liner conduit in a borehole. The ... | 04/17/2007 |
| 7178588 | Flexible cup for downhole devices An improved cup and method for making same for use on a “pig” or any other down hole equipment for engaging the wall of a pipe line, which comprises an inner metal sleeve portion; a metal shoulder portion extending outward from the sleeve around its perimeter ex... | 02/20/2007 |
| 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 |
| 7169239 | Solid expandable tubular members formed from very low carbon steel and method A very low carbon steel alloy is provided for use in manufacturing tubular members such as oil country tubular goods. The tubular members may be radially expanded from at least twenty percent to forty percent. Sections or joints of casing formed from the steel alloy... | 01/30/2007 |
| 7128154 | Single-direction cementing plug The present invention generally relates to apparatus and methods for completing a well. Particularly, the present invention relates to a single-direction plug for use with cementing applications and with drilling with casing applications. One embodiment comprises a ... | 10/31/2006 |
| 7082991 | Slip spring with heel notch In order to prevent premature separation of the slip and slip spring and to simplify production of the slip casing, a self-centering spring engageable with a packer tool slip is modified according to the present invention. A groove located at a lower center of the s... | 08/01/2006 |
| 7025146 | Alternative packer setting method Fluid setting pressure is delivered to a hydraulically set well packer through an external conduit strapped to the exterior of a well workstring above the packer assembly. The continuity of the external conduit is continued past the packer assembly by following a fl... | 04/11/2006 |
| 7008532 | Chromatographic device having an elongate rod and method of forming and chromatographic device A chromatographic device comprises a chromatographic tube, a chromatographic medium, a piston assembly, an elongate rod, and a threaded member. The piston assembly is within the tube and is positioned generally between a first end of the tube and the chromatographic... | 03/07/2006 |
| 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 |
| 6745844 | Hydraulic power source for downhole instruments and actuators Disclosed is a system for using pressure differential between completion fluid in an oil well and produced fluids to power downhole devices, including instruments and actuators. A conduit is provided bypassing a packer which seals a production string to a well casin... | 06/08/2004 |
| 6609567 | Tubing hanger with lateral feed-through connection A packer and method for sealing an annulus in a wellbore is provided. In one aspect the packer comprises a body having one or more conduits formed there-through; a chamber disposed within the body, wherein the chamber is in fluid communication with each o... | 08/26/2003 |
| 6371211 | Method of creating a weld in a wellbore A method of creating a weld to connect a first element to a second element, said elements being arranged in a wellbore containing a wellbore fluid, is provided. The method comprises selecting a welding path along which the weld is to be created, selecting... | 04/16/2002 |
| 6273195 | Downhole flow and pressure control valve for wells A flow and pressure control valve for injecting a fluid into a well, or for pumping the fluid out of the well, includes an outer housing, a mandrel within the outer housing, and a pressure element attached to the mandrel. The pressure element can be press... | 08/14/2001 |
| 6026897 | Communication conduit in a well tool An improved apparatus for transmitting signals through a well tool is provided. In a broad aspect, the present invention is a communication conduit in a well tool comprising: a cylindrical mandrel having a longitudinal bore therethrough, an inner diameter... | 02/22/2000 |
| 5810083 | Retrievable annular safety valve system An annular safety valve system provides a retrievable annular safety valve and packer. In a preferred embodiment, an annular safety valve system has an annular safety valve connected to an upper tubing string extending to the earth's surface. The annular ... | 09/22/1998 |
| 5697449 | Apparatus and method for temporary subsurface well sealing and equipment anchoring A retrievable packoff assembly for temporarily sealing a well pipe and anchoring equipment at a subsurface location within the pipe. The assembly is connected to a tubular actuation tool which is manipulated from the surface to position the assembly at a ... | 12/16/1997 |
| 5549165 | Valve for inflatable packer system A pressure limit valve for well tools where a valve member is moveable between a first closed portion, an open position and a second closed position. A spring for closing the valve is separated from a locking chamber which contains locking elements. The l... | 08/27/1996 |
| 5505263 | Packer set safety valve for controlling dual fluid flows A packer set safety valve assembly for controlling annular and tubing flows within a subterranean wellbore is disclosed. The packer set safety valve assembly controls the annular and tubing flows through dual flow paths. The assembly includes a means, tha... | 04/09/1996 |
| 5396953 | Positive circulating valve with retrievable standing valve A positive circulating valve with a retrievable standing valve therein. The valve is used with a packer positioned therebelow. The circulating valve comprises a housing with a mandrel slidably disposed therebetween. A J-slot controls movement between open... | 03/14/1995 |
| 5329999 | Annular safety system An annular safety system for a well produced by gas lift includes a packer, a landing nipple below the packer and an operating seal unit to which primary and secondary well tubings and a control line are connected. There is an inline valve in the secondar... | 07/19/1994 |
| 5261486 | Method and apparatus for gravel pack well completions A method and apparatus for installing a gravel pack well completion wherein flow of fluid in the well can be effectively blocked and excessive hydrostatic pressure can be isolated from the top of a pre-placed column of gravel while an auger-liner assembly... | 11/16/1993 |
| 5230383 | Electrically actuated well annulus safety valve A method and apparatus of electrically and sequentially completing an oil and/or gas well through a tubing production string in a well casing. The operation includes electrically and sequentially actuating downhole equipment such as well packers, a safety... | 07/27/1993 |
| 5217077 | Resettable packer A resettable downhole packer is provided. Circulation from the surface creates a backpressure behind the packing element that expands the packing element into contact with the wellbore or casing. The tool may be shifted to trap pressure behind the element... | 06/08/1993 |
| 5211243 | Annulus safety valve The present invention relates to a subterranean well annulus pressure safety valve. In one embodiment, the valve is full opening to permit complete access therethrough of wireline and other remedial tools, and contains the annulus safety valve members com... | 05/18/1993 |
| 5207275 | Annulus safety valve The present invention relates to a subterranean well annulus pressure safety valve. In one embodiment, the valve is full opening to permit complete access therethrough of wireline and other remedial tools, and contains the annulus safety valve members com... | 05/04/1993 |
| 5193615 | Apparatus for use in controlling flow through a tubing string suspended and packed off within well bore as well as within the annulus between the tubing string and well bore above and below the packer There is disclosed apparatus for use in controlling flow through a tubing string suspended and packed off within a well bore and within the annulus between the string and well bore above and below the packer by tools adapted to be lowered into and raised ... | 03/16/1993 |
| 5133412 | Pull release device with hydraulic lock for electric line setting tool A pull release apparatus is provided for use in a wellbore when coupled between a fluid-actuated wellbore tool and a retrievable source of pressurized fluid. The pull release, fluid-actuated tool, and source of pressurized fluid are positioned in the well... | 07/28/1992 |
| 5117913 | Chemical injection system for downhole treating A chemical injection assembly and apparatus for treating production fluids in a bore-hole. The system includes a fixed packer having an opening passing therethrough for receiving a production tubing string, a closable orifice in the packer that is actuate... | 06/02/1992 |
| 5048610 | Single bore packer with dual flow conversion for gas lift completion A single bore packer is modified by a dual flow seal unit for gas lift completion. This permits the operator to inject lift gas into the upper casing annulus at the well head, bypass the hanger packer and conduct the lift gas into the suspended production... | 09/17/1991 |
| 5044434 | Long stroke packer A long stroke packer for use in a well bore. The packer has a housing assembly with an operating mandrel assembly disposed therein. A packer mandrel assembly is slidably connected to the housing assembly. During operation, the operating mandrel assembly m... | 09/03/1991 |
| 4699216 | Blowout preventer for a side entry sub A side entry sub logging system has features for preventing a blowout should a kick in the casing annulus occur. A packer is mounted to the side entry sub below the sidewall passage. The packer has an elastomeric element for expansion of the element into ... | 10/13/1987 |
| 4671352 | Apparatus for selectively injecting treating fluids into earth formations In the representative embodiment of the invention described herein, formation-treating apparatus is adapted to be dependently supported in a well bore from a pipe string and which includes upper and lower telescoped body members adapted to be selectively ... | 06/09/1987 |
| 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 |
| 4619319 | Packer and actuation portion of tubing conveyed completion system A packer portion and actuating portion for a tubing conveyed well perforating system used for the completion of formations for both testing and production which system may be actuated either mechanically by a sinker drop bar or hydraulically by pressure i... | 10/28/1986 |
| 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 |
| 4586567 | Subterranean well tool with pressure-equalizing release A retrievable well tool for use in a subterranean well conduit utilizes plural valving elements to establish a fluid bypass around at least one annular elastomeric sealing element in response to movement of a control mandrel. The annular elastomeric seali... | 05/06/1986 |
| 4573529 | High flow injection anchor An anchor for a tubing string for use with a sucker rod pump is provided which defines a large fluid passage area for the passage of treatment fluids through the anchor. The anchor comprises a tubular body or body extensions having two vertically spaced s... | 03/04/1986 |
