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| Number | Title | Issue Date |
| 6704689 | Complexity index methodology for the analysis of run life performance A system and method for predicting a specific aspect, such as run life, of a component or system. The system utilizes a variety of complexity index values that are assigned to each component of the system. Each complexity index value is determined accordi... | 03/09/2004 |
| 6545221 | Splice system for use in splicing coiled tubing having internal power cable A system for splicing coiled tubing used in deploying downhole equipment and having an internal power cable. The system includes first and second segments of coiled tubing each having power cable disposed therein. Additionally, mounting fixtures are attac... | 04/08/2003 |
| 6491102 | Downhole multiplexer and related methods In a broad aspect, the present invention is a downhole hydraulic multiplexer, which is comprised of one or more piloted shuttle valves, and method of using. The invention takes one or more input signals from a surface control panel or computer, said signa... | 12/10/2002 |
| 6424066 | System for reducing wear and improving longevity of a electric submergible pumping system An electric submergible pumping system having a submergible electric motor with a unique rotor bearing system to promote longevity of the motor. The system includes an electric motor having a housing and a stator mounted within the housing. A shaft is rot... | 07/23/2002 |
| 6424105 | Real-time control of feedback signals to a motor for optimum performance An electric motor that may be used in a remote location, such as in a wellbore for pumping production fluids. The electric motor is designed to permit real-time adjustment of the position feedback signals to optimize motor performance. A position sensor i... | 07/23/2002 |
| 6409485 | System and method for sealing an electrical connection between a power cable and a submersible device A sealing system that provides a secure seal against liquid transfer in harsh environments, such as those found in wellbore applications. The sealing system utilizes a connector housing having an axial passage. The interior passage is sized to receive at ... | 06/25/2002 |
| 6397945 | Power cable system for use in high temperature wellbore applications A submersible pumping system for use in high temperature, wellbore applications. The system includes an electric submersible pumping unit, having at least a submersible motor, a motor protector and a submersible pump powered by the submersible motor. A un... | 06/04/2002 |
| 6388353 | Elongated permanent magnet synchronous motor A permanent magnet synchronous motor system. The system uses a permanent magnet AC synchronous motor having an elongated housing, of the type used in progressive cavity pumping applications. Within the stator, a multi-section rotor is rotatably mounted. T... | 05/14/2002 |
| 6371226 | Drag-type rotary drill bit There is provided a rotary drag-type drill bit comprising a bit body having a leading surface comprising a plurality of pads, at least some of the pads each having a wearable abrasive surface including particles of superhard material and defining an outer... | 04/16/2002 |
| 6364013 | Shroud for use with electric submergible pumping system A shroud for use with a submergible pumping system. The shroud is disposed over a submergible motor and includes fluid channels for conducting heat away from the submergible motor. The shroud is formed from a sheet material, such as sheet metal, to permit... | 04/02/2002 |
| 6361280 | System and method for locking parts to a rotatable shaft An improved system for mounting components to a rotatable shaft. The improved system may include a pump having impellers keyed to a rotatable shaft. Diffusers cooperate with the impellers to conduct pumped fluid upward from the impeller. The improved syst... | 03/26/2002 |
| 6357530 | System and method of utilizing an electric submergible pumping system in the production of high gas to liquid ratio fluids A system for producing production fluids from a wellbore while removing gas that collects in pockets within the wellbore. The system includes an electric submergible pumping unit. The unit includes a submergible pump powered by a submergible motor. The fl... | 03/19/2002 |
| 6354740 | Rolling cutter drill bits A rolling cutter drill bit comprises a body and three legs, each leg having a cantilevered bearing spindle, a rolling cutter rotatably mounted on the bearing spindle, lubricant delivering means within the bearing spindle, and a floating thrust bearing ele... | 03/12/2002 |
| 6338621 | Volume reduction mandrel for use in pneumatic isostatic forging A densified sintered product, such as a rolling cutter adapted for use in a steel tooth rolling cutter earth boring bit, has a layer of a metal powder applied to the external surface of the unsintered compact, the metal powder being melted to form a thin ... | 01/15/2002 |
| 6332499 | Deployment tubing connector having internal electrical penetrator A connector for use in a deployment system able to deploy and power a device, such as an electric submergible pumping system, in a well. The connector includes pluggable ends that permit connection adjacent segments, each having an outer section of tubing... | 12/25/2001 |
| 6325143 | Dual electric submergible pumping system installation to simultaneously move fluid with respect to two or more subterranean zones A dual submergible pumping system permits the production and/or injection of fluids from or into separate zones within a narrowly confined wellbore without commingling of fluids. The system includes at least first and second electric submergible pumping s... | 12/04/2001 |
| 6318467 | System and method for pumping and heating viscous fluids in a wellbore A system for pumping and heating viscous fluids in a wellbore includes electrical power supplies, a switchboard, conductors, and a submergible pumping system having a pump and a submergible electric motor. The electrical power supplies are coupled to the ... | 11/20/2001 |
| 6311776 | Dual diverter and orientation device for multilateral completions and method In a broad aspect, the invention is a downhole well tool for use within a well casing having a locking slot, an orienting profile, an alignment slot, and a lateral well bore window. The tool may broadly include a body member having a first and a second lo... | 11/06/2001 |
| 6307290 | Piston motor protector, and motor and pumping system incorporating the same A downhole pumping system includes a downhole pump that is coupled to a downhole motor. The downhole motor includes a motor protector that utilizes one or more retractable and extensible pistons, instead of an elastomeric bag, to accommodate motor oil con... | 10/23/2001 |
| 6305402 | Variable orifice gas lift valve for high flow rates with detachable power source and method of using The present invention is a surface controlled gas lift valve designed for high flow rates and used in a subterranean well, comprising: a valve for sealable insertion in a mandrel, having a variable orifice which alternately permits, prohibits, or throttle... | 10/23/2001 |
| 6299672 | Subsurface integrated production systems A technique is described for producing fluids from a series of wells. Production fluids from production wells are raised from the wells and deposited in a separation unit. The production fluids typically include both liquid and gas phase components. The s... | 10/09/2001 |
| 6298921 | Modular system for deploying subterranean well-related equipment A modular system for deploying and powering a device, such as an electric submergible pumping system, in a well. The modular system includes a plurality of interconnectable segments that each include an outer section of tubing and an internal power cable.... | 10/09/2001 |
| 6298917 | Coiled tubing system for combination with a submergible pump A coiled tubing system deploys an electric submergible pump system within a wellbore. The coiled tubing system includes an internal power cable for providing power to a submergible motor. Additionally, a control line, such as a hydraulic line, is disposed... | 10/09/2001 |
| 6296061 | Pilot-operated pressure-equalizing mechanism for subsurface valve A subsurface valve with a pressure-equalizing mechanism is provided to permit pressure above and below a valve closure member to equalize prior to the opening of the valve closure member. The pressure-equalizing mechanism may be installed, for example, in... | 10/02/2001 |
| 6290430 | System for pumping liquids having a low specific gravity from a subterranean storage cavern A system and method for producing a low specific gravity liquid from underground storage. The system includes a subterranean cavern and a sump in fluid communication with a floor of the cavern. A bottom intake ESP system is deployed to draw liquid from th... | 09/18/2001 |
| 6268672 | System and method for protecting a submergible motor from corrosive agents in a subterranean environment A motor protector for use in protecting an electric motor in a subterranean environment. The motor protector utilizes a dual, flexible bladder system. One of the expandable bladders provides for the expansion and contraction of motor oil. The other expand... | 07/31/2001 |
| 6260626 | Method and apparatus for completing an oil and gas well A technique is provided for supplying electrical power to a submersible pumping system in a well completion. The pumping system includes a submersible electric motor, a pump driven by the motor and a separator for separating liquid and gas phase component... | 07/17/2001 |
| 6260627 | System and method for improving fluid dynamics of fluid produced from a well A system for pumping high gas-to-liquid ratio well fluids. The system includes a submersible pumping system having a submersible motor and a submersible pump driven by the motor. The system further includes deployment tubing, such as production tubing or ... | 07/17/2001 |
| 6257333 | Reverse flow gas separator for progressing cavity submergible pumping systems A system for separating gas from a wellbore fluid as it is produced to the surface. The system includes a progressing cavity pump, a submergible electric motor and a fluid intake. The submergible electric motor is connected to the progressing cavity pump ... | 07/10/2001 |
| 6257792 | Retaining ring The invention is directed to a retaining ring for securing components along a shaft by transferring the compression load between the components, thereby preventing the adjacent components from separating. The retaining ring includes a pair of arcuate inte... | 07/10/2001 |
| 6250390 | Dual electric submergible pumping systems for producing fluids from separate reservoirs A dual submergible pumping system permits pumping of fluids from separate zones within a narrowly confined wellbore without commingling of fluids. The system includes a single deployment tubing from which a first and second submergible pumping system are ... | 06/26/2001 |
| 6247536 | Downhole multiplexer and related methods In a broad aspect, the present invention is a downhole hydraulic multiplexer, which is comprised of one or more piloted shuttle valves, and method of using. The invention takes one or more input signals from a surface control panel or computer, said signa... | 06/19/2001 |
| 6247535 | Orienting and locking swivel and method In a broad aspect, the invention is an orienting and locking swivel including: a locking ratchet housing having a longitudinal bore; a first tubular member partially disposed within the longitudinal bore of the locking ratchet housing; a second tubular me... | 06/19/2001 |
| 6247545 | Single energizer face seal for rocks bits with floating journal bearings The present invention is a self adjusting, volume balanced, single energizer rigid face seal for rolling cutter drill bits with floating journal bearings. Volume balancing is accomplished by utilizing a floating static seal between the rigid face seal rin... | 06/19/2001 |
| 6241015 | Apparatus for remote control of wellbore fluid flow An apparatus for remotely controlling fluids in a well is provided. The flow control apparatus may include a body member having a flow port in an outer wall of the body member, and a flow aperture spaced inwardly from the outer wall. A remotely shiftable ... | 06/05/2001 |
| 6242829 | Submersible pumping system utilizing a motor protector having a metal bellows A downhole pumping system includes a downhole pump that is coupled to a downhole motor. The downhole motor includes a motor protector that utilizes one or more retractable and extensible bellows, instead of an elastomeric bag, to accommodate motor oil con... | 06/05/2001 |
| 6241022 | Control line connector The present invention is a connector which connects a first control line in a downhole well tool to a second control line. The connector may include a main body having a longitudinal bore therethrough, a tubular extension threadably secured within a mount... | 06/05/2001 |
| 6237693 | Failsafe safety valve and method A subsurface well safety valve having a flow tube telescopically movable in a housing for controlling the movement of a valve closure member. A piston and cylinder assembly actuates the flow tube and is in communication with hydraulic control fluid from t... | 05/29/2001 |
| 6237683 | Wellbore flow control device A device for regulating fluid flow in a well is provided. The device may include: a body member having a central bore extending therethrough, at least one flow port, and a first valve seat; a sleeve member movably disposed within the central bore of the b... | 05/29/2001 |
| 6231312 | Variable orifice gas lift valve for high flow rates with detachable power source and method of using The present invention is a surface controlled gas lift valve designed for high flow rates and used in a subterranean well, comprising: a valve for sealable insertion in a mandrel, having a variable orifice which alternately permits, prohibits, or throttle... | 05/15/2001 |
