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| Number | Title | Issue Date |
| 8100181 | Surface controlled subsurface safety valve having integral pack-off A safety valve apparatus has a housing with a bore and a projection in the bore. A flapper rotatably disposed on the housing is movable relative to the bore between opened and closed positions, and a packing element disposed on the housing is compressible to engage ... | 01/24/2012 |
| 7963334 | Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation A kit for converting an existing wireline retrievable surface controlled subsurface safety valve (170, 270, 370) into a bypass passageway apparatus (100) allowing the injection of production-enhancing fluid into a wellbore while maintaining the operati... | 06/21/2011 |
| 7712537 | Method and apparatus for continuously injecting fluid in a wellbore while maintaining safety valve operation A kit for converting an existing wireline retrievable surface controlled subsurface safety valve (170, 270, 370) into a bypass passageway apparatus (100) allowing the injection of production-enhancing fluid into a wellbore while maintaining the operati... | 05/11/2010 |
| 7347272 | Formation isolation valve The present invention provides for high volume flow from a well. A retrievable formation isolation valve allows high volume flow through the remaining casing or tubing. Alternatively, a large bore valve configuration that is not retrieved, but remains as part of the... | 03/25/2008 |
| 7331398 | Multi-drop flow control valve system A multi-drop flow control valve system having a plurality of hydraulically actuated flow control valve, each valve set in an initial operating position. The flow control valves are connected to a hydraulic control line in sequence, wherein the second flow control va... | 02/19/2008 |
| 7258508 | Annular safety and flow control system for underground gas storage A gas storage well with a tubing string that is disposed within a wellbore communicating an underground storage cavern with the surface. A surface controlled subsurface safety and flow control system is provided within the wellbore so that all flow into or out of th... | 08/21/2007 |
| 7249635 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve A communication tool (100) includes a housing (102) having recesses (110) and a set of axial locating elements (112) radially extendable through the recesses (110) and engagably positionable within a profile of a tubing retrievable... | 07/31/2007 |
| 7210534 | Lock for a downhole tool with a reset feature The lock allows two members in a downhole tool to be temporarily held together. In an application where mandrel movement is dictated by pressure cycling in combination with a J-slot mechanism, such as in a downhole valve, the mandrel is releaseably retained to an ad... | 05/01/2007 |
| 7204315 | Dual valve well control in underbalanced wells A method of isolating a reservoir of production fluid in a formation comprises providing a pair of valves (14, 16) in a bore intersecting a production formation and in which the hydrostatic pressuer in the bore at the formation is normally lower than the form... | 04/17/2007 |
| 7198109 | Double-pin radial flow valve A valve with the following components: a pipe; an inner sub connected to the pipe; an outer sub connected to the pipe, wherein the inner and outer subs are concentric and define a sub annulus; a conduit between the sub annulus and an inside diameter of the inner sub... | 04/03/2007 |
| 7195072 | Installation of downhole electrical power cable and safety valve assembly The present invention generally provides apparatus and methods for removing liquid from a well. In one embodiment, a cable and subsurface safety valve assembly is used with a downhole pumping system to remove water from the well. The cable and subsurface safety valv... | 03/27/2007 |
| 7195225 | Rotary valve assembly The present invention is directed to rotary valve assemblies and, more particularly, to a rotary valve assembly for use in an oil and gas production system. The valve assembly comprises a movable actuator sleeve movable in response to hydraulic pressure and at least... | 03/27/2007 |
| 7178599 | Subsurface safety valve A subsurface safety valve assembly for controlling fluid flow in a wellbore. In one embodiment, the subsurface safety valve assembly includes a tubular member having a longitudinal bore extending therethrough, a flapper removably connected to the tubular member. The... | 02/20/2007 |
| 7152678 | System and method for downhole operation using pressure activated valve and sliding sleeve An isolation system for producing oil and gas from one or more formation zones and methods of use are provided comprising one or more pressure activated valve and one or more tool shiftable valve. The tool shiftable valve may be actuated before or after actuation of... | 12/26/2006 |
| 7086471 | Method and apparatus for controlling downhole flow The invention relates to apparatus for controlling the flow rate of a fluid in tubing (4), said apparatus (5) comprising at least one hole (7) passing through the wall of said tubing and a moving shutterjacket (8) mounted to engage said h... | 08/08/2006 |
| 7048079 | Mud saver valve A three-part sub-assembly comprising a wire line retrievable spear. The spear having two fluid chambers. A diverter valve having a truncated, inverted cone valve seat is preferably threaded into the interior of the spear. A diverter valve stem, having back-to-back c... | 05/23/2006 |
| 7032672 | Subsurface safety valve having a communication tool accessible non annular hydraulic chamber A tubing retrievable safety valve (50) having a non annular hydraulic chamber (60) in a sidewall portion thereof is operable to received a communication tool (100) therein such that relative rotation between at least a portion of the communicati... | 04/25/2006 |
| 7021385 | Method and apparatus for controlling well pressure in open-ended casing A system and method for preventing blowouts during the deployment of a casing string into a wellbore. The system includes securing a casing coupling to a casing string and securing a retrievable check valve within the casing coupling. The retrievable check valve all... | 04/04/2006 |
| 7021386 | Safety valve having extension spring closure mechanism A safety valve having an extension spring closure mechanism. In a described embodiment, a valve for use in a subterranean well is provided which includes a biasing device and a closure member having open and closed positions. The biasing device has a length which de... | 04/04/2006 |
| 6978842 | Volume compensated shifting tool The present invention provides for an apparatus and method of use for a hydraulic shifting tool to be used in a sealed volume in a subsurface well completion to actuate a downhole device, without a fluid return to surface or the well annulus. ... | 12/27/2005 |
| 6953093 | Communication tool for accessing a non annular hydraulic chamber of a subsurface safety valve A tubing retrievable safety valve (50) having a non annular hydraulic chamber (60) in a sidewall portion thereof is operable to received a communication tool (100) therein such that relative rotation between at least a portion of the communicati... | 10/11/2005 |
| 6880641 | Subsurface safety valve and method for communicating hydraulic fluid therethrough A system for communicating hydraulic fluid to a wireline retrievable safety valve (44) comprises a tubing retrievable safety valve (50) having a non annular hydraulic chamber (60) in a sidewall portion thereof and a communication tool (100 | 04/19/2005 |
| 6742595 | Subsurface safety valve lock out and communication tool and method for use of the same A communication tool (100) for communicating hydraulic fluid through a tubing retrievable safety valve (50) is disclosed. The tool (100) has a first section (102) and a second section (132) that are initially coupled together. A se... | 06/01/2004 |
| 6715557 | Tool string A tool string for deployment in a wellbore includes an upper string and a lower string. The upper string includes a valve actuator, and the lower string includes a valve. The lower string is adapted to receive the upper string, and the valve actuator controls the op... | 04/06/2004 |
| 6695049 | Valve assembly for hydrocarbon wells A valve assembly for hydrocarbon wells comprises a first valve (e.g., a conventional gate valve) and a second valve (e.g., a hydraulically operated, fail safe check valve). The second valve provides an alternative to the pressure barrier conventionally fo... | 02/24/2004 |
| 6691787 | Gas operated pump for use in a wellbore The present invention generally provides a gas operated pump having a removable and insertable valve. In one aspect, the invention includes a pump housing having a fluid path for pressurized gas and a second fluid path for exhaust gas. The fluid paths are... | 02/17/2004 |
| 6659185 | Subsurface safety valve lock out and communication tool and method for use of the same A communication tool (100) for communicating hydraulic fluid through a tubing retrievable safety valve (50) is disclosed. The tool (100) has a first section (102) and a second section (132) that are initially coupled together. A set of axial locating keys... | 12/09/2003 |
| 6523614 | Subsurface safety valve lock out and communication tool and method for use of the same A communication tool (100) for communicating hydraulic fluid through a tubing retrievable safety valve (50) is disclosed. The tool (100) has a first section (102) and a second section (132) that are initially coupled together. A set of axial locating keys... | 02/25/2003 |
| 6352118 | System and method for communication hydraulic control to a wireline retrievable downhole device A system and method for communicating hydraulic control to a wireline retrievable downhole device (112) are disclosed. The system utilizes a tubing retrievable downhole device (50) having a hydraulic chamber (70). A radial cutting tool (104) is selectivel... | 03/05/2002 |
| 6269883 | Disconnect tool A disconnect tool includes a housing that has a first segment and a second segment. A first collet is coupled to the first segment and has a first plurality of fingers, each of the first plurality of fingers is bendable between a first position in which t... | 08/07/2001 |
| 6202747 | Hydraulic well packer and method A hydraulically controlled packer for an oil or gas well is disclosed that is capable of being hydraulically unset. One embodiment of the invention is capable of being hydraulically unset prior to locking thus allowing fine tuning of packer location in re... | 03/20/2001 |
| 6082455 | Combination side pocket mandrel flow measurement and control assembly The present invention is a combination wireline retrievable, side pocket locatable, fluid measurement and control assembly, which permits measurement and control of fluid from a first downhole production zone while maintaining fluid flow through the tubin... | 07/04/2000 |
| 5842521 | Downhole pressure relief valve for well pump A well pump assembly has a pressure relief valve in the tubing string for avoiding excessive discharge pressure on a progressing cavity pump. The pressure relief valve is mounted in the string of tubing downstream of the pump. The valve assembly has a mai... | 12/01/1998 |
| 5771974 | Test tree closure device for a cased subsea oil well In an offshore oil installation, the closure device (40) of a subsurface test tree placed in the blowout preventer stack on the seabed is made in a modular manner. More precisely, the closure device comprises a plurality of lengths (54,56') suitable for b... | 06/30/1998 |
| 5318127 | Surface controlled annulus safety system for well bores A safety system including a surface controlled subsurface safety valves for use in a well having annulus fluid flow. One of the safety valves has a valve closure member, and a small diameter offset piston actuator to move the valve closure member in respo... | 06/07/1994 |
| 5314026 | Landing nipple A safety valve landing nipple selectively provides a pin for closing communication in the bore between the first control line and the safety valve control line so that communication between the first control line and an insert safety valve in the landing ... | 05/24/1994 |
| 5303774 | Ring seal packer A ring seal packer is used for sealing the inside of a specified diameter of API tube. The cylindrical body of the ring seal packer has a pair of circumferential grooves and a pair of rigid seal rings are provided in each such groove. The two rings collec... | 04/19/1994 |
| 5293943 | Safety valve, sealing ring and seal assembly A downhole, inline well safety shutoff valve has a spring-loaded, normally closed flapper shutoff valve element that may be opened by a downwardly driven movement of an operator tube coaxially and slidably disposed within the tubing string bore. The opera... | 03/15/1994 |
| 5285850 | Well completion system for oil and gas wells A well completion system and method in which reeled tubing is connected in the completion string which includes a safety valve and a sliding sleeve valve. A straddle assembly is provided within the sliding sleeve valve for sealing against axial flow of fl... | 02/15/1994 |
| 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 |
