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| Number | Title | Issue Date |
| 8141648 | Multiple-positioning mechanical shifting system and method A multiple-positioning mechanical shifting system including for used in hydrocarbon wells. The system includes a shifting tool capable of selectively positioning a mechanical sliding sleeve valve in multiple operational positions that varying the flow rate and/or vo... | 03/27/2012 |
| 8069926 | Method of controlling flow through a drill string using a valve positioned therein A downhole valve comprises a tubular body and a valve member. The valve member is normally closed and in the closed position may prevent or restrict passage of a working fluid through the body. The valve member is movable to an open position, a first working fluid p... | 12/06/2011 |
| 8066079 | Drill string flow control valves and methods Drill string flow control valves and more particularly, drill string flow control valves for prevention of u-tubing of fluid flow in drill strings are provided. Drill string flow control valves may comprise a valve housing, a valve sleeve axially movable within a va... | 11/29/2011 |
| 8056643 | Systems and techniques to actuate isolation valves A tool that is usable in a well and may include an operator, a switch, a resilient device and an indexer. The switch may be configured to selectively communicate a first force to the operator, thereby actuating the tool. The resilient device may exert a second force... | 11/15/2011 |
| 8037940 | Method of completing a well using a retrievable inflow control device A retrievable flow control device comprising a housing configured to sealably couple with a completion component. The housing may comprise a first port and a second port establishing a fluid pathway. The fluid pathway may regulate a fluid flow as the fluid flow pass... | 10/18/2011 |
| 8037941 | Dual packer for a horizontal well A dual packer for at least partially defining a production zone in a wellbore, the dual packer including a packer body having an up-hole side and a down-hole side. A first through bore and a second through bore each extend through the packer body from the up-hole si... | 10/18/2011 |
| 8033338 | Wellbore continuous circulation systems and method Systems and methods for continuously circulating fluid, e.g., drilling mud, through a wellbore tubular string, the systems in certain aspects including a sub positionable in fluid communication with the tubular string, the sub with a body, a plug releasably closing ... | 10/11/2011 |
| 8006772 | Multi-cycle isolation valve and mechanical barrier A method for performing a wellbore-related activity may include positioning a sealing device along the wellbore; conveying a work string into the wellbore; using the work string to perform the activity; extracting the work string out of the wellbore; and shifting th... | 08/30/2011 |
| 7987914 | Controlling actuation of tools in a wellbore with a phase change material A technique is provided for actuating devices deployed in a wellbore. The technique utilizes an actuator that cooperates with a downhole device, such as a well tool. The actuator has a phase change material that can be caused to undergo a phase change upon an approp... | 08/02/2011 |
| 7987915 | Circulating sub with mudsaver for dispensing and circulating fluid in a well bore A circulator sub tool and fluid saver with a system and method for dispensing and circulating fluid in a well bore having a threaded packer sub with a quick coupler body, and wherein diameters for each annulus of the quick coupler body and the sub body are substanti... | 08/02/2011 |
| 7980316 | Formation isolation valve A valve includes a housing, a valve element that is located in the housing, an operator, a locking device and an interference device. The housing includes an interior surface that has a profile. The operator may be configured to transition the valve element between ... | 07/19/2011 |
| 7967076 | Flow-actuated actuator and method An actuator includes, a first tubular, a second tubular longitudinally movably disposed within the first tubular and movable in response to fluid flow therethrough, the second tubular having a full bore therethrough, and a movable member movably attached to the seco... | 06/28/2011 |
| 7967075 | High angle water flood kickover tool A kickover tool for placing and extracting a valve in a mandrel having a hydraulic piston, a kickover arm portion mechanically connected to the hydraulic piston, the kickover arm portion being actuated by application of pressure to the piston. Upon full stoke of the... | 06/28/2011 |
| 7967074 | Electric wireline insert safety valve Methods and devices for utilizing an electrically-actuated wireline insert safety valve (WLSV) within a wellbore. Power is delivered to an electrically actuated WLSV to actuate the WLSV via inductive charging and without the use of wired contact. ... | 06/28/2011 |
| 7963342 | Downhole isolation valve and methods for use A method and apparatus for actuating a downhole tool in a wellbore. The method and apparatus including an actuator that operates the tool in response to the functioning of an energetic charge. The energetic charge may be set off as a part of a perforating operation.... | 06/21/2011 |
| 7954555 | Full function downhole valve and method of operating the valve Downhole valves comprise a housing having a bore, a port, upper and lower recesses disposed in an inner wall surface of the bore, the upper recess disposed above the port and the lower recess disposed below the port, and upper and lower pistons disposed in the bore.... | 06/07/2011 |
| 7950468 | Wellbore plug A method of retrieving at least a first plug and a second plug of the same type from a wellbore, wherein when the plugs are set in the wellbore each plug has a valve in a closed position blocking flow of fluid through the plug and a sealing mechanism expanded into e... | 05/31/2011 |
| 7926580 | Coiled tubing multi-zone jet frac system A coiled tubing multi-zone frac system for fracing a formation adjacent a well using a sliding sleeve and erodible jets. Erodible jets can provide a means for perforating, fracing and flowing the well which takes the place of two separate tools that are otherwise ne... | 04/19/2011 |
| 7913769 | Downhole safety valve apparatus and method The application discloses a safety valve including a flapper valve and a packer assembly to be installed in a bore to isolate a first zone from a second zone. Preferably, the safety valve includes a hydraulic conduit bypassing the flapper valve to allow communicatio... | 03/29/2011 |
| 7886835 | High angle water flood kickover tool A kickover tool is for placing and extracting a valve in a mandrel having a tool body extending in a longitudinal direction and having a hydraulic piston chamber therein. A hydraulic piston is located inside the hydraulic piston chamber. A kickover arm portion is me... | 02/15/2011 |
| 7878256 | Burst plug for a downhole fluid passage A burst plug for positioning in a downhole fluid passage has: a shear disc installable in a sealing position in the fluid passage. The shear disc is openable by applying fluid at a burst pressure against the shear disc. The burst plug has a retainer and sleeve forme... | 02/01/2011 |
| 7878257 | Triggering mechanism discriminated by length difference A downhole trigger mechanism and method for using the same are provided. The downhole trigger mechanism can include at least two contact points spaced a longitudinal distance from one another. The trigger mechanism can be actuated when the contact points of the trig... | 02/01/2011 |
| 7870908 | Downhole valve having incrementally adjustable open positions and a quick close feature A valve that is usable with a well includes an indexer and a closing mechanism. The indexer includes a profile to establish a sequence of open settings for the valve, and the indexer is adapted to respond to first control stimuli to transition the valve through the ... | 01/18/2011 |
| 7857067 | Downhole application for a backpressure valve A backpressure valve. The backpressure valve may be configured to maintain a substantially controlled pressure in bottom hole assembly while simultaneously being compatible with a pressure pulse tool downhole thereof. The backpressure valve includes pressure generat... | 12/28/2010 |
| 7854268 | Deep water hurricane valve A storm plug for temporarily isolating an offshore well in deep water includes a retrievable service packer connected to a valve housing containing a movable isolation sleeve and a standing valve. The standing valve precludes the fluid flow through a portion of the ... | 12/21/2010 |
| RE41979 | Flow control apparatus and method A fluid flow control apparatus for use in a mid-string location in a pipe string being run into a well has an open fluid flow route to the annulus above the apparatus to provide more flow area for upwardly moving fluid. Flow up the upper pipe string bore is resisted... | 12/07/2010 |
| 7841416 | Method and apparatus for retaining a soft seal in an integrated flapper mount, hard seat, spring housing surface controlled subsurface safety valve Presented is a subsurface safety valve in which the flapper mount, hard seat and spring housing have been integrated into a single assembly. To accommodate a “soft seat insert,” a special retainer soft seat ring and soft seat seal are provided. The soft seat sea... | 11/30/2010 |
| 7832489 | Methods and systems for completing a well with fluid tight lower completion An apparatus and method for completing a well. The apparatus can include a packer located downhole of a sand control sliding sleeve extension device to create an upper annulus and a lower annulus. The apparatus can also include a formation isolation well control bar... | 11/16/2010 |
| 7828067 | Inflow control device The present invention generally relates to the control of fluid flow in a wellbore. In one aspect, a flow control device for use in a wellbore is provided. The flow control device includes an inner member having at least one aperture formed therein. The flow control... | 11/09/2010 |
| 7823649 | System and method for plugging a side pocket mandrel using a swelling plug Plugging a side pocket mandrel using a swelling plug. A system for plugging a port in a side pocket of a mandrel in a subterranean well includes a plugging device installed in the side pocket of the mandrel, the plugging device including a swellable seal material, w... | 11/02/2010 |
| 7810575 | Isolation system comprising a plug and a circulation valve and method of use An isolation system for an oil and gas well is described wherein the system comprises an isolation section and a first isolation device integral with the section and a second isolation device sealingly engaged to the section. The first isolation device may be a pres... | 10/12/2010 |
| 7802627 | Remotely operated selective fracing system and method A remotely-operated selective fracing system and valve. The valve comprises a casing with at least one casing hole; an inner sleeve nested within the casing and having at least one sleeve hole alignable with the at least one casing hole; actuator means engagable wit... | 09/28/2010 |
| 7793732 | Backpressure valve for wireless communication A backpressure valve. The backpressure valve may be configured to maintain a substantially controlled pressure in coiled tubing uphole thereof while simultaneously being compatible with a pressure pulse tool downhole thereof. The backpressure valve includes pressure... | 09/14/2010 |
| 7793733 | Valve trigger for downhole tools An actuator device for setting a downhole tool comprises a piston disposed in an upper reservoir of the device, the piston comprising two actuation areas upon which pressure acts to move the piston. The upper reservoir is in fluid communication with a lower reservoi... | 09/14/2010 |
| 7789162 | Method for running tubulars in wellbores Methods for installing tubulars into a highly deviated wellbore may include a) drilling the well to the planned total depth of the interval, b) placing a first fluid into the wellbore below a prescribed measured depth in the high-angle portion of the wellbore, c) pl... | 09/07/2010 |
| 7784553 | Downhole waterflood regulator A downhole waterflood regulator installs in a side pocket mandrel to regulate fluid flow in a waterflood completion. The regulator has an internal piston and can have a check dart. The piston and check dart regulate fluid flow within the regulator's housing. Packing... | 08/31/2010 |
| 7779925 | Seal assembly energized with floating pistons Methods and apparatus for sealing a plug within tubing that the plug is designed to be landed and set in are disclosed. The plug includes a seal assembly having a seal on the plug that is acted on by a piston. Wellbore fluid pressure acts on the piston when the valv... | 08/24/2010 |
| 7775291 | Retrievable surface controlled subsurface safety valve A safety valve apparatus has a housing with a bore and a projection disposed in the bore. A locking dog disposed on the housing is movable to engage an inner conduit wall surrounding the housing, and a flapper rotatably disposed on the housing is movable between ope... | 08/17/2010 |
| 7717185 | Lock open and control system access apparatus for a downhole safety valve A combination penetration tool for access to the control system of a subsurface safety valve also has a lockout for the flapper that operates by latching into a nipple profile near its upper end as a series of collet fingers pass through a sleeve that is held in the... | 05/18/2010 |
| 7703541 | Rotary actuator mechanism for a downhole tool A tool that is usable with a well includes a movable element and a curved actuator. The curved actuator is adapted to move in a curved path that at least partially surrounds a longitudinal axis of the tool to actuate the element. ... | 04/27/2010 |
