| Patent Number |
Title Of Patent |
Date Issued |
| RE40944 |
Adjustable shear valve mud pulser and controls therefor |
October 27, 2009 |
| A telemetry system involving a shear-type mud pulser valve as the preferred embodiment is described. The control system includes a motor driver for the mud pulser which, in essence, moves one movable plate with respect to a stationary plate to create openings of various sizes. Pressu |
| RE40308 |
Multi-purpose injection and production well system |
May 13, 2008 |
| 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 in the apparatus to |
| RE40167 |
Nuclear magnetic resonance fluid characterization apparatus and method for using with electric w |
March 25, 2008 |
| A method for characterizing a fluid sample withdrawn from an earth formation. The method includes performing nuclear magnetic resonant spin echo measurements on the fluid sample at a nuclear magnetic resonant frequency of carbon-13. Amplitudes of the spin echo measurements are summed |
| RE38866 |
Pressure-boost device for downhole tools |
November 8, 2005 |
| A pressure-boosting apparatus particularly amenable for use in downhole applications is disclosed. The pressure-boosting apparatus employs an unbalanced piston which is initially fixated in a run-in position. The piston has a flowpath therethrough in which is mounted a check valve. I |
| RE38567 |
Apparatus and method for self adjusting downlink signal communication |
August 24, 2004 |
| An apparatus for sending signals downhole during drilling operations uses a main pump to pump mud from a mud pit at a substantially constant flow rate. The bulk of the pumped mud goes downhole to maintain adequate circulation for the drill bit. A bypass pipe is provided with a shut-off |
| RE37995 |
Progressive cavity pump with flexible coupling |
February 18, 2003 |
| A progressive cavity pump located in a well and driven by a downhole electrical motor. A connector locates between the drive shaft of the motor and the rotor of the pump. The connector includes a connector shaft which has a lower end restrained on a longitudinal axis. The upper end orbit |
| RE37127 |
Hardfacing composition for earth-boring bits |
April 10, 2001 |
| A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered carbides are selected from the group of carbides consisting of chromium, molybdenum, niobium, |
| RE36817 |
Method and apparatus for drilling and enlarging a borehole |
August 15, 2000 |
| A reaming apparatus for enlarging a borehole, including a tubular body having one or more longitudinally and generally radially extending blades circumferentially spaced thereabout. Each of the blades carries highly exposed cutting elements, on the order of fifty percent exposure, on its |
| RE36291 |
Reaction product of nitrogen bases and phosphate esters as corrosion inhibitors |
September 7, 1999 |
| A method for inhibiting corrosion of metal surfaces in an aqueous medium, comprising incorporating into the medium a corrosion inhibitor in an amount sufficient to inhibit corrosion, the corrosion inhibitor comprising a water-soluble agent selected from the group consisting of compositio |
| RE35386 |
Method for drilling directional wells |
December 3, 1996 |
| A method for detecting and sensing boundaries between strata in a formation during directional drilling so that the drilling operation can be adjusted to maintain the drillstring within a selected stratum is presented. The method comprises the initial drilling of an offset well from whic |
| RE34526 |
Two cone bit with non-opposite cones |
February 1, 1994 |
| A two-cone earth boring bit having non-opposite cones that minimize the tendency for off-center rotation or rough running. The bit is composed of two cones, each having a cantilevered bearing shaft with an axis extending inwardly and downwardly. A rotatable, generally conical cutter is m |
| RE34451 |
Perforating gun with auger |
November 23, 1993 |
| The invention features a perforating gun, with an external auger, which can be mounted to a tubing string. The auger facilitates removal of the gun after the sand is placed in the perforations. The perforating gun with external auger promotes the clean-up of the debris from the perforati |
| D460828 |
Wear resistant tiles for lining a centrifuge bowl |
July 23, 2002 |
|
| D460827 |
Wear resistant tiles for lining a centrifuge bowl |
July 23, 2002 |
|
| D460562 |
Wear resistant tiles for lining a centrifuge bowl |
July 16, 2002 |
|
| D448488 |
Wear resistant tiles for lining a centrifuge bowl |
September 25, 2001 |
|
| D405813 |
Mixing vessel baffle |
February 16, 1999 |
|
| D388924 |
Accelerator vane for a centrifuge |
January 6, 1998 |
|
| D388583 |
Accelerator vane for a centrifuge |
December 30, 1997 |
|
| D387534 |
Accelerator vane for a centrifuge |
December 9, 1997 |
|
| D386874 |
Accelerator vane for a centrifuge |
November 25, 1997 |
|
| 7617880 |
Anchor assembly for slickline setting tool for inflatables |
November 17, 2009 |
| An anchor assembly for use in downhole slickline strings to set wellbore inflatables comprises, in one specific embodiment, an upper mandrel, an upper piston, radially extendable slips, a release piston in sliding engagement with a release mandrel, and a lower housing in sliding enga |
| 7617868 |
Liner anchor for expandable casing strings and method of use |
November 17, 2009 |
| Expandable casing has an expandable slip used for completion of a mono-diameter wellbore. The expandable casing is run through the upper casing and has an upper end that overlaps a lower end of the upper casing to form a fluid flow path between the expandable casing and the upper cas |
| 7617867 |
Overshot tool |
November 17, 2009 |
| An overshot tool includes a grapple, a torque sub rotationally fixed to the grapple and a deformable member in operable communication with the torque sub. The torque sub is responsive to torsional movement thereof. A method for retrieving a fish with the tool is also included. |
| 7617747 |
Methods of manufacturing rotary drag bits including a central region having a plurality of cutti |
November 17, 2009 |
| A rotary drag bit including an inverted cone geometry proximate the longitudinal axis thereof is disclosed. The inverted cone region may include a central region, the central region including a plurality of cutting structures affixed thereto and arranged along at least one spiral pat |
| 7616001 |
Method and apparatus for borehole wall resistivity imaging in the presence of conductive mud and |
November 10, 2009 |
| A resistivity imaging tool is used in a borehole having a conductive fluid. Second differences between axially spaced apart electrodes are used in the imaging. A calibration compensates for the effects of borehole rugosity. |
| 7615741 |
Determining organic carbon downhole from nuclear spectroscopy |
November 10, 2009 |
| Elemental analysis of an earth formation is obtained using measurements from a gamma ray logging tool. From the elemental analysis, an estimate of the Calcium, Magnesium and Carbon content of the formation is determined. The amount of organic carbon in the formation is estimated from |
| 7615517 |
Use of mineral oils to reduce fluid loss for viscoelastic surfactant gelled fluids |
November 10, 2009 |
| Fluids viscosified with viscoelastic surfactants (VESs) may have their fluid loss properties improved with at least one mineral oil which has a viscosity greater than 20 cps at ambient temperature. The mineral oil may initially be dispersed oil droplets in an internal, discontinuous phas |
| 7615516 |
Microemulsion containing oil field chemicals useful for oil and gas field applications |
November 10, 2009 |
| Useful microemulsions have corrosion inhibitors in the internal phase and an external phase and at least one surfactant that helps define the emulsion. The corrosion inhibitor itself may have its pH adjusted so that it also serves the role of surfactant. The corrosion inhibitors form |
| 7614449 |
Tangentially-loaded high-load retrievable slip system |
November 10, 2009 |
| A slip system includes a set of drive slips having wickers thereon, substantially all of which being truncated in cross-section; a set of gripping slips operatively interengagable with the set of drive slips; a drive slip end ring in operable communication with the set of drive slips |
| 7614302 |
Acoustic fluid analysis method |
November 10, 2009 |
| A method of analyzing acoustic data, that includes determining fluid sound speed through connate fluid. The method involves sampling the fluid, sending an acoustic signal into the fluid between a first and a second reflective interface. Data is recorded that represents acoustic signals |
| 7612567 |
Two-axial pad formation resistivity imager |
November 3, 2009 |
| A resistivity imaging device injects currents in two orthogonal directions using two pairs of return electrodes and performing impedance measurements of the buttons placed between the returns. |
| 7612566 |
Method and apparatus for the use of multicomponent induction tool for geosteering and formation |
November 3, 2009 |
| Measurements made with a multicomponent logging instrument when used in a substantially horizontal borehole in earth formations provide diagnostic of the direction of beds relative to the position of the borehole. When the logging instrument is conveyed on a drilling assembly, the drilli |
| 7611339 |
Tri-line power cable for electrical submersible pump |
November 3, 2009 |
| A power line for an electrical submersible pump has three metallic impermeable tubes. A single electrical conductor is located within each of the tubes. Each conductor has at least one elastomeric insulation layer surrounding it. An annular portion of the insulation layer of each of |
| 7611338 |
Tandem ESP motor interconnect vent |
November 3, 2009 |
| An electrical submersible well pump assembly has upper and lower motors that are filled with oil. During installation in a well, the upper motor lowers into engagement with the lower motor. The drive shafts of the motors have splined ends that engage each other within a central cavity. |
| 7610964 |
Positive displacement pump |
November 3, 2009 |
| A submersible pumping system for use downhole that includes a housing containing an expandable fluid, that when expanded pushes a piston that in turn pumps wellbore fluid to the surface. The expandable fluid can be a silicon based heat transfer fluid with a coefficient of thermal exp |
| 7610960 |
Depth correlation device for fiber optic line |
November 3, 2009 |
| A correlation system is provided to allow association of readings from a cable that is supported by a string but that is coiled around or has slack in one or many locations to a specific location along the string itself. Heat sources can be placed along the string to periodically or |
| 7610958 |
Downhole actuation tool |
November 3, 2009 |
| Disclosed herein is a device that relates to an actuator comprising a plurality of individual piston chambers pressurized by a common pressure source. A plurality of pistons are in operable communication with the piston chambers, the pistons each being in operable communication with an |
| 7610957 |
Downhole debris catcher and associated mill |
November 3, 2009 |
| A debris catching device for downhole milling features modular debris receptacles that are held in the housing in a manner that facilitates stacking and a generally undulating flow path to facilitate dropping of the debris into the receptacles as the remaining fluid travels up the to |
| 7609066 |
Apparatus and method for measuring micro-resistivity anisotropy |
October 27, 2009 |
| A method for measuring anisotropy in thin-bed formations calls for placing a logging tool into a borehole in the formation and applying current to at least one set of injection electrodes and at least one set of return electrodes to measure resistivity in the formation. Resistivity m |
| 7607896 |
Systems and methods for power ride-through in variable speed drives |
October 27, 2009 |
| Systems and methods for providing ride-through for interruptions in the power supplied to drives that are used to control equipment such as downhole submersible pumps. In one embodiment, a variable speed drive includes converter and inverter sections, a capacitor bank and a control s |
| 7607486 |
One trip tubular expansion and recess formation apparatus and method |
October 27, 2009 |
| A one trip top to bottom expansion to form a lower end recess on a tubular is described using two swages of different dimensions. The smaller swage is run down hole with the larger swage behind it in a locked collapsed position. When the proper depth is reached the leading swage hits a n |
| 7607477 |
Optical wet connect |
October 27, 2009 |
| A cable that delivers power, signals, or information is wet connected downhole. The lower portion of the cable can be in an auxiliary conduit to a main tubular and be installed already connected to sensors, instruments or other downhole equipment. The connection is made up downhole t |
| 7607476 |
Expandable slip ring |
October 27, 2009 |
| An expandable slip ring is used to secure attachment of an expanded tubular to a surrounding tubular. It features elongated generally axially oriented openings separated by narrow segments. As a swage is advanced within a tubular that has the slip ring outside it the narrow segments or |
| 7605716 |
Telemetry system with an insulating connector |
October 20, 2009 |
| The present invention provides an electromagnetic telemetry apparatus and methods that include an insulating connector that comprises an outer metallic female member that has an inner conical longitudinal surface. In one embodiment, a tubular metallic male member is disposed in the femal |
| 7604072 |
Method and apparatus for collecting drill bit performance data |
October 20, 2009 |
| Drill bits and methods for sampling sensor data associated with the state of a drill bit are disclosed. A drill bit for drilling a subterranean formation comprises a bit body and a shank. The shank further includes a central bore formed through an inside diameter of the shank and con |
| 7604062 |
Electric pressure actuating tool and method |
October 20, 2009 |
| Disclosed herein is a downhole tool actuation arrangement. The arrangement includes a housing having a chamber, at least one piston in operable communication with the chamber and at least one electrode exposed to the chamber. The electrodes are receptive to a power source. Further di |
| 7604061 |
Coupler retained liner hanger mechanism and methods of setting a hanger inside a wellbore |
October 20, 2009 |
| A liner hanger has a housing with a pocket disposed on an inner wall surface and a slip slidingly engaged within the pocket. The liner hanger housing is secured in the string of casing. A setting mechanism connected to the slips is also located in the pocket. An actuator is mounted on th |
| 7604056 |
Downhole valve and method of making |
October 20, 2009 |
| Disclosed herein is a downhole valve. The downhole valve includes, a flapper seat, a flapper sealable against the flapper seat, a spring housing in axial alignment with the flapper seat and a metal-to-metal seal disposed between the flapper seat and the spring housing. The metal-to-m |
| 7604055 |
Completion method with telescoping perforation and fracturing tool |
October 20, 2009 |
| An apparatus and method for perforating a liner, fracturing a formation, and injecting or producing fluid, all in one trip with a single tool. The tool has a plurality of outwardly telescoping elements(12,14) for perforation, fracturing. The tool also has a mechanical control device |
