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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 8171990 | In-situ formation strength testing with coring A method and apparatus for estimating one or more formation properties using in-situ measurements conducted at or near a coring location include a coring tool adapted to cut a core sample in a formation, a member having a distal end that engages a borehole wall subs... | 05/08/2012 |
| 8162061 | Subsea inflatable bridge plug inflation system A remotely operated submersible vehicle (ROV) is used to carry a bridge plug down to a sub sea well. The ROV is operated from a surface vessel or platform and is outfitted with a submersible hydraulic pump and a manipulator arm. Additionally, the ROV is provided wit... | 04/24/2012 |
| 8151895 | Eutectic salt inflated wellbore tubular patch Systems and methods for patching a desired section of wellbore casing or another tubular member. A patch assembly is provided which includes a tubular patch sub which is radially surrounded by an inflatable boot. A setting tool is used to set the patch assembly with... | 04/10/2012 |
| 8141419 | In-situ formation strength testing Estimating formation properties includes a member coupled to a carrier, the member having a distal end that engages a borehole wall location, the distal end having a curved surface having a radius of curvature in at least one dimension about equal to or greater than... | 03/27/2012 |
| 8109340 | High-pressure/high temperature packer seal A packer device includes an elastomeric packer element which is seated upon an inner sleeve that surrounds a central inner mandrel. The inner sleeve and the inner mandrel are oriented at an angle of departure with respect to the central axis of the tool, thereby pro... | 02/07/2012 |
| 8083001 | Expandable gage ring A gage ring assembly to provide support to an anti-extrusion containment ring in a packer device including a compression ring and a plurality of interlocking arcuate segments which form a substantially unbroken support wall when in a set condition. A first set of se... | 12/27/2011 |
| 8082984 | Large bore packer and methods of setting same Devices and methods for setting a packer inside a wellbore with little appreciable reduction of the useable area of the wellbore. The outer casing or liner of the wellbore contains one or more integrated casing coupler joints having an increased diameter chamber por... | 12/27/2011 |
| 8074716 | Tension-activated fluid bypass device and associated method A fluid bypass tool that can be incorporated into a fishing arrangement between a fluid-operated latching tool and a fluid-operated jarring tool. The latching tool is actuated with fluid from the surface to be latched to and unlatched from a stuck tool in the wellbo... | 12/13/2011 |
| 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 |
| 7963322 | Large bore packer and methods of setting same Devices and methods for setting a packer inside a wellbore with little appreciable reduction of the useable area of the wellbore. The outer casing or liner of the wellbore contains one or more integrated casing coupler joints having an increased diameter chamber por... | 06/21/2011 |
| 7954553 | Use of low impact expansion to reduce flow friction Systems and methods for increasing fluid flow characteristics within a hydrocarbon production tubing string within a wellbore. An expansion member is passed through the interior flowbore of one or more production tubing string members. The expansion member smoothes ... | 06/07/2011 |
| 7918287 | Suction coring device and method Devices and methods for obtaining cores from a sea bed. A corer device includes one or more core barrels for retaining a cores and one or more pressure barrels. Fluid pressure within the pressure barrels is selectively varied to cause the corer device to be drawn in... | 04/05/2011 |
| 7913770 | Controlled pressure equalization of atmospheric chambers Methods and devices for equalizing an atmospheric chamber within a well tool in a controlled manner following the operation of setting the well tool. A packer setting tool has a setting mechanism with an atmospheric chamber and an equalization assembly to permit the... | 03/29/2011 |
| 7896082 | Methods and apparatus for negating mineral scale buildup in flapper valves Methods and devices for negating scale buildups on interior surfaces of a sliding sleeve valve housing above the flow tube. In some aspects, a wiper member provides additional clearance between the flow tube and housing to compensate for scale buildup. In other aspe... | 03/01/2011 |
| 7891434 | Packer setting device for high hydrostatic applications A packer setting device provides a buffered setting mechanism as a substantially incompressible fluid is selectively flowed into a compressible fluid chamber to compress a compressible fluid. This fluid transfer causes movement of a setting sleeve so that an associa... | 02/22/2011 |
| 7841399 | Pressure and friction reducing flow adapter A flow adapter includes an adapter body which defines a central axial flow bore and one or more lateral flow openings for fluid communication between the central flow bore and a production tubing flowbore surrounding the adapter. The central axial flow bore of the f... | 11/30/2010 |
| 7806193 | Swellable packer with back-up systems A packer assembly which incorporates a swellable elastomeric packer element and one or more swellable thermoplastic components. The swellable thermoplastic components are support rings that are located at each axial end of the elastomeric element and provide positiv... | 10/05/2010 |
| 7793727 | Low rate gas injection system A dewatering device is provided that can be inserted concentrically within the production tubing string of a natural gas-producing wellbore. The dewatering device includes a pressure-isolating chamber that is provided with a fluid inlet valve and a fluid outlet valv... | 09/14/2010 |
| 7789131 | Hydraulic pump system for deliquifying low rate gas wells Water is removed from a natural gas well using a piston pump is driven by a power fluid that is pumped into the wellbore. The power fluid is intermixed within wellbore water and pumped out of the wellbore along with the removed water. ... | 09/07/2010 |
| 7730955 | Grooved expandable recess shoe and pipe for deployment of mechanical positioning devices A first, expandable casing member, in an unexpanded state, is provided with a lower axial end that has a radially expanded upset or recess shoe and a locating profile. The first casing member is run into a wellbore, expanded, and secured in place within the wellbore... | 06/08/2010 |
| 7730953 | Multi-cycle single line switch Systems and methods for selectively operating multiple hydraulic pressure controlled devices (PCDs) within a borehole using a common inflow and outflow line and a common cycling line. A control system is used wherein each of the PCDs is operationally associated with... | 06/08/2010 |
| 7730948 | Use of coated proppant to minimize abrasive erosion in high rate fracturing operations Methods for reducing wear in pumping components during fracturing operations. A coated proppant is used that causes less wear on the pumping components as the proppant is pumped into the wellbore. The proppant coating consists of a substrate having a coating thereup... | 06/08/2010 |
| 7694746 | Large bore packer and methods of setting same Devices and methods for setting a packer inside a wellbore with little appreciable reduction of the useable area of the wellbore. The outer casing or liner of the wellbore contains one or more integrated casing coupler joints having an increased diameter chamber por... | 04/13/2010 |
| 7681652 | Packer setting device for high-hydrostatic applications A packer setting device provides a buffered setting mechanism as a substantially incompressible fluid is selectively flowed into a compressible fluid chamber to compress a compressible fluid. This fluid transfer causes movement of a setting sleeve so that an associa... | 03/23/2010 |
| 7677303 | Zero-relaxation packer setting lock system A packer mandrel is radially surrounded by an axially compressible packer element and a backing ring. A setting sleeve arrangement also surrounds the packer mandrel adjacent the packer element. A hydraulic locking mechanism is used to secure the setting sleeve arran... | 03/16/2010 |
| 7665529 | Lubricator valve with rotational flip-flap arm An improved lubricator valve arrangement for use within a wellbore to allow the passage of tools, such as perforating guns and the like, into the wellbore while it is live. The inclusion of two, independently controllable flapper-type safety valves within the lubric... | 02/23/2010 |
| 7658230 | High pressure insulated electrical, fiber and tubing feed-through fitting assembly A protective pressure-resistant enclosure, or housing is provided, which can be incorporated into a production assembly within a wellbore. A conductor associated with the monitoring system is passed through a bulkhead using a hermetically sealed arrangement wherein ... | 02/09/2010 |
| 7650945 | Inflatable closure system A closure device that is useful as a safety valve within a tubular member, such as production tubing and pipelines. The closure device includes an inflatable bladder that is disposed within a cavity in the wall of the tubular member. A fluid conduit interconnects a ... | 01/26/2010 |
| 7650941 | Equalizing injection tool An equalizing injection wash tool includes a plurality of interconnectable wash tool segments. Each of the segments provides a flow applicator nozzle for transmitting fluid/and or solid from the interior flowbore of the wash tool and into the surrounding formation. ... | 01/26/2010 |
| 7575058 | Incremental annular choke An annular choke mechanism is incorporated into a flow path within the outer housing of the sleeve valve to the interior flow ports of the sliding sleeve member. As the sliding sleeve member is moved axially within the housing, the lateral fluid ports of the sliding... | 08/18/2009 |
| 7556102 | High differential shifting tool Systems and methods for opening and/or closing sliding sleeve valves while preventing significant stress upon and damage to the fluid seals that are disposed between the outer housing and the sleeve member elements of the valve. A shifting tool carries a latching de... | 07/07/2009 |
| 7533724 | Downhole intelligent impact jar and method for use An intelligent downhole impact jar device is described that is able to sense well bore angle or deviation and alter the effective jar impact load based upon the sensed information. The impact jar device includes a jarring portion for creating jarring impacts within ... | 05/19/2009 |
| 7510013 | Hydraulic metering valve for operation of downhole tools Methods and systems for operating a sliding sleeve valve or other downhole well tool that is axially shiftable among a finite number of increments between two extreme configurations such as open and closed configurations. A metering device is described having a pair... | 03/31/2009 |
| 7503384 | Multiple port cross-over design for frac-pack erosion mitigation A system for use in gravel packing operations wherein a gravel placement mandrel defines an axial flowbore and two or more lateral slurry flow ports for communication of slurry from the flowbore to the interior of the wear sleeve/blast liner. The slurry flow ports a... | 03/17/2009 |
| 7493956 | Subsurface safety valve with closure provided by the flowing medium Devices and methods for selectively closing and opening flow of production fluid (oil, gas, or water) through the flowbore of a production string by chemically altering the phase of fluid media flowing through the production tubing to form a substantially solid plug... | 02/24/2009 |
| 7493945 | Expandable packer with mounted exterior slips and seal A packer device includes a central packer mandrel and a radially surrounding expansion mandrel. At least one slip mandrel carrying wickers surrounds the expansion mandrel and is secured in place upon the expansion mandrel by an annular retaining ring. The slip mandr... | 02/24/2009 |
| 7467665 | Autonomous circulation, fill-up, and equalization valve Systems and methods for operating a circulation valve such that the valve will automatically close without the need for a ball to be dropped or other intervention from the surface. The circulation valve is autonomous and will preferably be actuated from an open to a... | 12/23/2008 |
| 7451816 | Washpipeless frac pack system A well packing system and method for operating a well packing system wherein an isolation string assembly has a lower circulation valve with lateral flow ports that are operated to an open position without the use of shifters on a wash pipe. The isolation string ass... | 11/18/2008 |
| 7445047 | Metal-to-metal non-elastomeric seal stack An improved seal assembly for use in sliding sleeve valves. The seal assembly incorporates a number of annular, chevron-shaped seal elements that are in a stacked configuration and preferably formed of a thermoplastic material to provide a fluid seal between the out... | 11/04/2008 |
| 7441605 | Optical sensor use in alternate path gravel packing with integral zonal isolation Devices and methods for monitoring wellbore conditions while conducting hydrocarbon production within a wellbore, particularly an open-hole wellbore, having multiple zones within. A production tubing string assembly is made up having a plurality of packers for seali... | 10/28/2008 |
