Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8047293 | Flow-actuated actuator and method Disclosed herein is a flow-actuated actuator. The actuator includes, a tubular movable relative to a structure within which the tubular is positionable, and a plurality of full bore flow-resisting elements disposed at the tubular, the plurality of full bore flow-res... | 11/01/2011 |
| 7694742 | Downhole hydraulic control system with failsafe features A control system for a subsurface safety valve addresses normal open and closed operation and a failsafe operation if key system components fail. It features a single control line from the surface that splits at the subsurface safety valve and goes to one end of two... | 04/13/2010 |
| 7497265 | Reclosable mechanical annular flow valve A mechanical flow control device is provided that allows flow of production fluids along an annular path and across an valve body. A sliding sealing member can be mechanically transitioned between an opened flow position and a closed flow position as desired. The me... | 03/03/2009 |
| 7422065 | System for controlling zones of fluid in and out of a wellbore A system for controlling zones of fluid flow in and out of a wellbore. The wellbore has a top of a well and a bottom of a well. The system has a control line connected to a power source, and a control system; wherein the control line is disposed within the wellbore.... | 09/09/2008 |
| 7373972 | Piloting actuator valve for subterranean flow control A piloting actuator valve controls flow in a well. The piloting actuator valve is combined with a downhole completion and utilizes a pilot valve to control actuation of a main valve. A controllable actuator is coupled to the pilot valve and enables selective control... | 05/20/2008 |
| RE40308 | Multi-purpose injection and production well system A method and apparatus for simultaneously producing fluid from one or more zones of an oil or gas well, while injecting fluid into one or more other zones of the well, and for converting a depleted production zone into an injection zone, by remotely shifting sleeves... | 05/13/2008 |
| 7363981 | Seal stack for sliding sleeve A method and apparatus for sealing a tool for use in a wellbore is provided. The seal is configured to be disposed in a tool comprising a ported sliding sleeve and a ported housing. The tool may be actuable between a closed and an open position. The seal is configur... | 04/29/2008 |
| 7347268 | One trip flow tube exercising tool A flow tube exercising tool and method for use are described for actuating the flow tube of a downhole safety valve in order to remove build ups of scale and debris from the safety valve and ensure proper operation. The exercising tool provides an engagement portion... | 03/25/2008 |
| 7347269 | Flow tube exercising tool A flow tube exercising tool and method for use are described for actuating the flow tube of a downhole safety valve in order to remove build ups of scale and debris from the safety valve and ensure proper operation. The exercising tool provides a lower engagement po... | 03/25/2008 |
| 7331392 | Pressure range delimited valve A differential pressure valve has a valve body containing a main piston axially moveable therein to open a fluid inlet to a fluid outlet at preset high pressure and to close at a preset lower pressure. A high pressure trigger piston and a low pressure trigger piston... | 02/19/2008 |
| 7322417 | Technique and apparatus for completing multiple zones An apparatus that is usable with a well includes a string and a plurality of tools that are mounted in the string. The string includes a passageway. The tools are mounted in the string and are adapted to be placed in a state to catch objects (free-falling objects an... | 01/29/2008 |
| 7303020 | Interventionless oil tool actuator with floating piston and method of use An interventionless actuator for oil well tools is described wherein the actuator comprises at least one floating piston adapted to equalize a pressure differential and lock onto an actuating member. An interventionless actuator is described that is charged to an in... | 12/04/2007 |
| 7258323 | Variable radial flow rate control system A variable radial flow rate control valve including a body forming a bore along the longitudinal axis thereof for transporting a fluid through the body, a fixed choke member fixedly positioned about the bore, the fixed choke member forming a fixed aperture, a rotati... | 08/21/2007 |
| 7252153 | Bi-directional fluid loss device and method A fluid loss device including a flapper and seat assembly that provide a seal on a lower flapper surface when the flapper is closed and resists pressure in either direction. The flapper and seat assembly is spring biased to contact a flapper support above the flappe... | 08/07/2007 |
| 7237611 | Zero drill completion and production system The present invention is a method and apparatus for a one trip completion of fluid production wells. A completion tool string includes a pressure activated cementing valve, an external casing packer, a pressure activated production valve, an opening plug and a plug ... | 07/03/2007 |
| 7228914 | Interventionless reservoir control systems Systems and methods for positively closing off a section of wellbore and, thereby providing reservoir control. Systems and methods are described for selectively closing off a section of a wellbore to fluid communication. The wellbore completion section may then be r... | 06/12/2007 |
| 7152688 | Positioning tool with valved fluid diversion path and method A positioning tool for moving an element in a flow path of a down hole system without actuating a pressure actuated device in the system. The positioning device includes a choke for restricting flow of fluid between the positioning device and the down hole system, a... | 12/26/2006 |
| 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 |
| 7150326 | Bi-directional ball seat system and method The present invention provides a bi-directional ball seat and method of use. In at least one embodiment, the present invention provides a fluid control system that includes a radial protrusion that can be selectively engaged and disengaged upstream and/or from a bal... | 12/19/2006 |
| 7114697 | Fast valve actuator and tool provided with same The invention relates to a quick-acting valve actuator comprising: a driven member (31) driven by a drive device (35) suitable for causing the driven member (31) to travel along a stroke (C1) to a trigge... | 10/03/2006 |
| 7082994 | Radially adjustable downhole devices and methods for same A method for logging a wellbore includes actuating a positioning device to adjust the position of a module relative to a reference point or object such as a wellbore axis or proximally positioned downhole device. With respect to a wellbore, an exemplary positioning ... | 08/01/2006 |
| 7059418 | Pressurized seal arrangement A pressurized sealing arrangement suited for providing a seal between a valve stem and a valve body is provided. The sealing arrangement includes a piston that is restrained in and statically sealed to the valve body and which surrounds the valve stem. Contained wit... | 06/13/2006 |
| 7059426 | Acoustic flow pulsing apparatus and method for drill string An underground drilling method and apparatus generates intense pressure pulses at a location at the surface. The pressure pulses propagate down through a drill string to a drill bit. The pulses may be generated by creating water hammer in flowing drilling mud. Inten... | 06/13/2006 |
| 7055598 | Fluid flow control device and method for use of same A fluid flow control device (60) for use in a wellbore to control the inflow of production fluids comprises a sand control screen (62) having a base pipe (64) with a first set of openings (66) that allows the production fluids to flow the... | 06/06/2006 |
| 7051813 | Pass through valve and stab tool A method and system allows periodic access the wrong way through one or more one-way valves installed in a fluid flow stream. Fluid can flow through the bypassed valves or through the tools used to bypass the valves such as those of a reciprocating production pump. ... | 05/30/2006 |
| 7048061 | Screen assembly with flow through connectors A connector for providing a pathway between a first screened tubing and a second screened tubing. In one embodiment, the connector includes an annular pipe coupled to the first screened tubing at a first end and coupled to the second screened tubing at a second end.... | 05/23/2006 |
| 7021389 | Bi-directional ball seat system and method The present invention provides a bi-directional ball seat and method of use. In at least one embodiment, the present invention provides a fluid control system that includes a radial protrusion that can be selectively engaged and disengaged upstream and/or from a bal... | 04/04/2006 |
| 7004252 | Multiple zone testing system A method and system for drillstem testing multiple zones in a well with a single testing trip into the well. A multiple zone tester is landed in the lower completion to form separate controllable flow paths from each of the zones. The multiple zone testing system fa... | 02/28/2006 |
| 6997263 | Multi zone isolation tool having fluid loss prevention capability and method for use of same A multi zone isolation tool (50) for use in a subterranean wellbore includes a first tubular and a second tubular disposed within the first tubular forming an annular flow path (110a, 110b) therebetween and a central flow path (... | 02/14/2006 |
| 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 |
| 6953084 | Actuator for well-head valve or other similar applications and system incorporating same An electrical actuator is particularly suited for driving a wellhead valve for regulating the flow of natural gas from a production well. The electrical actuator can be driven using the existing local power supply in wellhead valve systems, typically a solar panel a... | 10/11/2005 |
| 6874577 | Water, oil and gas well recovery system An auto-cycling plunger including a hollow, longitudinally extending body, at least one first directional outer seal, at least one second directional outer seal and a valve stem. Both the at least one first directional outer seal and the at least one second directio... | 04/05/2005 |
| 6860330 | Choke valve assembly for downhole flow control A choke valve assembly is disclosed for controlling the flow of fluid through a production tubing. The valve assembly includes a housing having a plurality of axially aligned apertures and a ported sleeve disposed in the housing. The ported sleeve has a plurality of... | 03/01/2005 |
| 6834722 | Cyclic check valve for coiled tubing A cyclic check valve is provided for a coiled tubing string which enables reverse circulating for a specific period when a specific combination of pumping condition and oil conditions are favorable. The check valve may be activated to prevent reverse flow up through... | 12/28/2004 |
| 6817416 | Flow control device A flow control device comprises an outer sleeve having an outer sleeve wall and at least one aperture through the outer sleeve wall; a inner sleeve having an inner sleeve wall and at least one aperture through the inner sleeve wall; and means for providing relative ... | 11/16/2004 |
| 6782951 | Flow-activated valve and method of use According to the present invention, the flow-activated valve assembly is a fluid-driven tool for use in various down hole drilling and fishing operations, which is activated by the introduction of fluid into an enclosed assembly, whereby fluid forces a movable porti... | 08/31/2004 |
| 6782948 | Remotely operated multi-zone packing system A multi-zone packing system having unique features that allow for remote operation, thereby eliminating the need to raise and lower a work string and crossover tool to various zones of interest during a frac pack, gravel pack or related completion procedure. The squ... | 08/31/2004 |
| 6763892 | Sliding sleeve valve and method for assembly A sliding sleeve valve and method for assembly is disclosed. The valve comprises a segmented main body that is assembled from a top, middle and bottom segments. The middle segment has flow apertures. A closing sleeve is co-axially mounted in the assembled main body.... | 07/20/2004 |
| 6729393 | Zero drill completion and production system Apparatus for a one trip completion of fluid production wells. A completion tool string includes a pressure activated cementing valve, an external casing packer, a pressure activated production valve, an opening plug and a plug landing collar and a closing plug and ... | 05/04/2004 |
| 6679324 | Downhole device for controlling fluid flow in a well There is provided a downhole device for controlling the flow of fluids through an oil and/or gas production well comprises a deformable chamber which contains an electromagnetic field or other stimuli responsive gel and a fluid passage which is closed off... | 01/20/2004 |
