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| Number | Title | Issue Date |
| 8016026 | Actuator for downhole tools An apparatus, method, and system for actuating a wellbore tool includes a body having a chamber in which a movable member is disposed. The movable member may connect to a selected wellbore tool. Within the chamber is a controllable fluid that substantially prevents ... | 09/13/2011 |
| 7735547 | Wellbore cleaning tool and method There is disclosed a cleaning tool for use in cleaning ferrous material from a wellbore, a cleaning assembly comprising a plurality of such wellbore cleaning tools, and a method of cleaning ferrous materials from a wellbore. In one embodiment, a cleaning tool... | 06/15/2010 |
| 7712519 | Transverse magnetization of casing string tubulars A method and apparatus for imparting a transverse magnetization to a wellbore tubular is disclosed. In certain exemplary embodiments, tubulars are magnetized to include at least one flux reversal (e.g., at the center of the tubular) at which the direction of the tra... | 05/11/2010 |
| 7624794 | Non-conductive and non-magnetic flowline for electromagnetic measurements on reservoir fluids at high pressures An apparatus and method to perform measurements on fluid in a wellbore fluid sample tool in which at least a portion of the flowline of the sample tool is made of a non-magnetic and non-conductive material. ... | 12/01/2009 |
| 7513299 | Magnetic tool for retrieving metal objects from a well bore when using coil tubing A magnetic tool for retrieval of metal debris from a well bore particularly adapted for use in coil tubing systems. The tool has a cylindrical body and a plurality of separate magnet assemblies mounted on the tool body. The magnet assemblies are separated by spacers... | 04/07/2009 |
| 7434631 | Apparatus and method of controlling motion and vibration of an NMR sensor in a drilling BHA A system for controlling sensor motion during a time-dependent measurement, comprising a drilling assembly having a drill bit at one end and engaged with a drill string extending to a surface location at an opposite end thereof. A sensor is disposed in the drilling ... | 10/14/2008 |
| 7436184 | Well logging apparatus for obtaining azimuthally sensitive formation resistivity measurements An apparatus for making azimuthally sensitive resistivity measurements of a subterranean formation is disclosed. The apparatus includes a magnetically permeably ring deployed about an electrically conductive tool body. An AC voltage supply is coupled to the tool bod... | 10/14/2008 |
| 7428922 | Valve and position control using magnetorheological fluids Magnetorheological fluids, which solidify in response to a magnetic field, offer the ability to simplify many of the valves and control systems used downhole in the search for and production of oil and gas. They lessen the need for moving parts, provide solid-state ... | 09/30/2008 |
| 7413011 | Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator Systems and methods for optically determining casing collar and/or corrosion locations within boreholes, using the diffraction effect of Faraday crystals through which depolarized continuous light is transmitted within optical fibers. ... | 08/19/2008 |
| 7407589 | Method and apparatus for preventing scale deposits and removing contaminants from fluid columns A method and apparatus provide fluid treatment at a plurality of distinct points using a length of energized magnetically conductive conduit in fluid communication with non-magnetic coupling devices. The instant invention prevents the formation and accumulation of c... | 08/05/2008 |
| 7383883 | Apparatus and method to detect a signal associated with a component An apparatus for use in a well comprises a structure having at least a first portion formed of a first material, and a detector to detect a signal associated with a component located either within or beyond the structure. The first material has a property that reduc... | 06/10/2008 |
| 7377333 | Linear position sensor for downhole tools and method of use Aspects of this invention include a downhole tool having first and second members disposed to translate substantially linearly with respect to one another. A magnet is deployed on the first member and a plurality of magnetic field sensors is deployed on the second m... | 05/27/2008 |
| 7373971 | Pump jack and method of use An electromagnetic ram for use in artificially lifting fluid from a well and in particular an oil well. The disclosure also teaches a method and system employing the ram. The use obviates existing systems used today in terms of cost, environmental concerns, optimize... | 05/20/2008 |
| 7370709 | Subterranean magnetic field protective shield Downhole mechanical or electrical equipment that possess, induce or supply large electromagnetic interference or magnetic fields are sometimes placed in subterranean wells, usually as part of or attached to wellbore tubulars. These magnetic fields can interfere with... | 05/13/2008 |
| 7357862 | Fluid conditioning system and method An exemplary method and system for reducing or eliminating the formation of solid precipitates/deposits of a flowing fluid, such as oil, or for reducing or eliminating existing solid precipitates/deposits contained in a flowing fluid, is provided. A fluid conditioni... | 04/15/2008 |
| 7353873 | Magnetic assemblies for deposit prevention and methods of use An apparatus and method for controlling and/or minimizing the formation or accumulation of unwanted deposits on the inside of fluid flow paths by employing at various locations along the path an assembly of permanent magnets oriented such that the fluid flow is pref... | 04/08/2008 |
| 7350590 | Instrumentation for a downhole deployment valve The present generally relates to apparatus and methods for instrumentation associated with a downhole deployment valve or a separate instrumentation sub. In one aspect, a DDV in a casing string is closed in order to isolate an upper section of a wellbore from a lowe... | 04/01/2008 |
| 7347261 | Magnetic locator systems and methods of use at a well site Magnetic locator systems and methods of using same at a wellhead are described. The magnetic locator systems include a magnetic field generator on an oilfield tool component, such as a deployment bar, adapted to be moved through an oilfield pressure control componen... | 03/25/2008 |
| 7337850 | System and method for controlling actuation of tools in a wellbore A technique is provided to control operation of well tools deployed in a wellbore. The technique utilizes a completion with at least one well tool actuated by fluid input. An electronic trigger system is associated with each well tool and is designed to respond to a... | 03/04/2008 |
| 7320363 | Energized slip ring assembly A slip ring assembly including a slip ring and an electrical contact assembly. The slip ring defines a circumference and an electrical contact groove extending around the circumference of the slip ring. The electrical contact assembly preferably includes a plurality... | 01/22/2008 |
| 7311143 | Method and apparatus for generation of acoustic shear waves through casing using physical coupling of vibrating magnets The method and apparatus of the present invention provides for inducing and measuring shear waves within a wellbore casing to facilitate analysis of wellbore casing, cement and formation bonding. An acoustic transducer is provided that is magnetically coupled to the... | 12/25/2007 |
| 7308738 | Releasable fastener systems and processes A releasable fastener system comprises a loop portion and a hook portion. The loop portion includes a support and a loop material disposed on one side thereof. The hook portion generally includes a support and a plurality of closely spaced upstanding hook elements e... | 12/18/2007 |
| 7287604 | Steerable bit assembly and methods A drilling system includes a steerable bottomhole assembly (BHA) having a steering unit and a control unit that provide dynamic control of drill bit orientation or tilt. Exemplary steering units can adjust bit orientation at a rate that approaches or exceeds the rot... | 10/30/2007 |
| 7283060 | Control apparatus for automated downhole tools A method and apparatus for a computer controlled apparatus for use in wellbore completions. A touch-screen is provided that facilitates commands and information that is entered by an operator ordering movement of a downhole tool. In another embodiment, real-time inf... | 10/16/2007 |
| 7274989 | Borehole equipment position detection system It is important to know the precise position of equipment when testing of the BOP, testing the wellhead, flow testing the well, kick control, well circulation and testing of spool trees between the wellhead and the BOP. Accordingly, there is provided a system for de... | 09/25/2007 |
| 7267177 | Tubing fill and testing valve The present invention provides for a valve in a tubing string that allows the tubing string to fill with well fluids as the string is assembled and lowered into a well bore, but can be used to check pressure integrity of the tubing string during various stages of th... | 09/11/2007 |
| 7261155 | Cable side-entry sub with grease injection flow tubes An integrated side-entry sub with grease injection flow tubes is adapted for making up in a drill string and includes a port to receive a cable, such as a wire line. A first pedestal, mounted within a cutout of the side entry sub, provides entry for the cable into t... | 08/28/2007 |
| 7246663 | Positive engagement indicator for wireline fishing operations A device and method for retrieving a tool string from downhole locations through the use of one or more engagement sensors. The one or more engagement sensors are activated by the tool string engaging an overshot device. The one or more engagement sensor may be mech... | 07/24/2007 |
| 7243733 | Cup tool for a high-pressure mandrel and method of using same A cup tool includes a cup tool tube having a threaded upper end for connection to a high-pressure mandrel. The cup tool has an outer surface over which an elastomeric cup is slidably mounted for movement from an unset position for entry into a wellbore to a set posi... | 07/17/2007 |
| 7228903 | Apparatus and method for wireline imaging in nonconductive muds A pad mounted resistivity imaging device includes at least one transmitter and two or more arrays of receivers. Analysis of the received signals is done using either amplitude and phase differences between the arrays of receivers, or by analyzing amplitude and phase... | 06/12/2007 |
| 7222671 | Apparatus and method for formation evaluation A viscometer for a down hole tool positionable in a well bore penetrating a subterranean formation is described. The formation contains at least one fluid therein. The down hole tool is adapted to convey at least a portion of the fluid to the viscometer. The viscome... | 05/29/2007 |
| 7219752 | System and method for damping vibration in a drill string A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define... | 05/22/2007 |
| 7219724 | Downhole magnetic retrieval tool A tool 10 for suspending in a well retrieves various metal debris from the well, and includes an elongate tool body 12 within a plurality of circumferentially shaped slots 14. Each slot having a radially outward portion with a circumferential wi... | 05/22/2007 |
| 7216723 | Pulse torque generator and power tool having the same A pulse torque generator utilizing a magnetic coupling, and an electric power tool provided with the pulse torque generator. The pulse torque generator includes an input shaft extending in its axial direction and having a hollow section providing a hollow space, and... | 05/15/2007 |
| 7213653 | Deep set safety valve Apparatus and methods are provided for actuation of downhole tools. In one example, a deep set safety valve uses a magnetic coupling which permits a portion of the safety valve at control line pressure to be isolated from tubing string internal pressure, without req... | 05/08/2007 |
| 7210526 | Solid state pump The present invention is a material and method that enables creation of an in situ pumping action within a matrix or otherwise porous media. This pumping action may be used to move materials, namely fluids, through the matrix or porous media to a gathering point. Th... | 05/01/2007 |
| 7191835 | Disengagable burr mill A downhole tool for use in the removal of burrs or other unwanted material from an inner surface of a pipeline, well casing or other tubular. The tool has a plurality of milling elements, which may be biased against the surface or retracted from the surface to disen... | 03/20/2007 |
| 7190084 | Method and apparatus for generating electrical energy downhole A method and apparatus that uses the flow of drilling fluid to generate electrical energy in a downhole environment. A substantially cylindrical housing comprises a wall having an inlet, an outlet, and a hollow passageway therebetween. A flow of drilling fluid throu... | 03/13/2007 |
| 7185715 | Apparatus and method of controlling motion and vibration of an NMR sensor in a drilling bha A system for controlling sensor motion during a time-dependent measurement, comprising a drilling assembly having a drill bit at one end and engaged with a drill string extending to a surface location at an opposite end thereof. A sensor is disposed in the drilling ... | 03/06/2007 |
| 7178600 | Apparatus and methods for utilizing a downhole deployment valve Methods and apparatus for utilizing a downhole deployment valve (DDV) to isolate a pressure in a portion of a bore are disclosed. Any combination of fail safe features may be used with or incorporated into the DDV such as redundant valve members, an upward opening f... | 02/20/2007 |
