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| Number | Title | Issue Date |
| 7918290 | Systems and methods for protecting drill blades in high speed turbine drills A drilling assembly in an elongated hole including a housing defining an interior with a plurality of motor stages in the interior. Each motor stage has at least one blade with supporting platform surfaces. A casing within the interior surrounds the plurality of mot... | 04/05/2011 |
| 7913773 | Bidirectional drill string telemetry for measuring and drilling control The disclosure has application for use in conjunction with an operation of drilling an earth borehole using: a drilling rig, a drill string having its generally upper end mechanically coupleable with and suspendable from the drilling rig, and a bottom hole assembly ... | 03/29/2011 |
| 7896628 | Downhole motor seal and method The rotor of a downhole motor includes a mandrel having at least one radial lobe, and an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement therebetween. The sleeve is compressed about the mandrel through one of various ... | 03/01/2011 |
| 7857075 | Wellbore drilling system A method related to restarting a drilling process includes the steps of applying a surface torque to a drill string in a borehole, detecting signals related to one of a torque and a rotational speed experienced at a bottom hole assembly, initiating drilling fluid fl... | 12/28/2010 |
| 7849939 | Drill bit The present invention recites a drill bit comprising a main body having an axis about which it is rotated in use, a cutting face, a connecting means for attaching the bit to a source of rotary motion, a gauge region intermediate said cutting face and the connecting ... | 12/14/2010 |
| 7805247 | System and methods for well data compression Systems and methods in which data compression techniques are utilized to fill a predetermined channel capacity are shown. According to one configuration, event data points within test data are selected for communication via the data communication channel and a data ... | 09/28/2010 |
| 7785012 | Bearing arrangement A bearing arrangement comprises a first component 10 and a second component 12, bearings 14, 16 being provided to support one of the first and second components 10, 12 for rotation relative to the other of the first and second components ... | 08/31/2010 |
| 7703549 | Method and apparatus for removing cuttings in high-angle wells A method of removing cuttings includes the steps of disposing a pipe string in a high-angle wellbore, circulating mud through the wellbore and creating a viscous coupling layer of mud spiraling about a section of the pipe string. Wherein the wellbore may be deviated... | 04/27/2010 |
| 7669669 | Tool face sensor method Exhaust pressure from at least one actuator (34,36) which can tilt joint 6 of a bottom hole assembly 4 can be utilized to determine the direction 26 tiltable joint 6 is pointing (e.g., orientation, angular displacement, and/or incl... | 03/02/2010 |
| 7669668 | System, apparatus, and method of conducting measurements of a borehole A method is provided for conducting measurements of a borehole while drilling the borehole in a geological formation. First, a rotatable drilling assembly is provided that has, at a forward end, a drill bit and a borehole measurement tool connected rearward of the d... | 03/02/2010 |
| 7660671 | Method and apparatus for electromagnetic logging of a formation Using an electromagnetic logging tool, desired antenna responses are synthesized from a combination of measured antenna responses, as well as antenna arrays particularly suited to provide the measurements. Those arrays may include cross dipole and double cross dipol... | 02/09/2010 |
| 7612565 | Apparatus and system for well placement and reservoir characterization A resistivity array having a modular design includes a transmitter module with at least one antenna, wherein the transmitter module has connectors on both ends adapted to connect with other downhole tools; and a receiver module with at least one antenna, wherein the... | 11/03/2009 |
| 7546885 | Apparatus and method for obtaining downhole samples A downhole drilling tool positionable in a wellbore penetrating a subterranean formation is provided. The tool includes a formation evaluation tool having fixed and retrievable portions. The fixed portion is operatively connected to a drill collar of the downhole to... | 06/16/2009 |
| 7298285 | Rotary downlink system A method for downlink communication with a downhole tool having a mud-powered downhole motor that includes receiving a sensor signal related to a rotational speed of a rotor in the mud-powered downhole motor, and interpreting the sensor signal to derive a downlink s... | 11/20/2007 |
| 7290443 | Method for measuring formation properties with a time-limited formation test An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a probe and a pretest piston positionable in fluid communication with the formation, and a series of flowlines pressure gauges, and valves configure... | 11/06/2007 |
| 7286091 | Co-located antennas Techniques for implementing antenna configurations with substantially co-located axes are disclosed. A method for constructing co-located antennas includes winding a first antenna on a support, the first antenna having a first magnetic dipole in a first orientation;... | 10/23/2007 |
| 7285772 | Logging tool with a parasitic radiation shield and method of logging with such a tool It is described a logging tool 20 for underground formations surrounding a borehole 14, comprising an elongated body 21 along a major axis; a collar 22 disposed peripherally around said body 21 having a collar wall defined by an in... | 10/23/2007 |
| 7284605 | Apparatus and methods for reducing stand-off effects of a downhole tool A method for reducing stand-off effects of a downhole tool includes disposing the downhole tool in a borehole, wherein the downhole tool comprises at least one moveable section disposed between an energy source and a receiver on the downhole tool; and activating the... | 10/23/2007 |
| 7279889 | System and method for calibration of well logging tools By breaking the calibration into two parts—one calibration offset being associated with a first portion, and the other calibration offset being associated with a second portion, it is possible to combine the various calibration offsets for a particular first porti... | 10/09/2007 |
| 7263880 | Method for measuring formation properties with a time-limited formation test An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a pretest piston positionable in fluid communication with the formation, and a series of flowlines pressure gauges, and valves configured to selecti... | 09/04/2007 |
| 7263836 | Vortex tube cooling system Systems and methods for cooling a component within a housing adapted for subsurface disposal using a vortex tube. The housing contains a first pressure chamber; a vortex tube coupled to the first pressure chamber; a cooling chamber coupled to the vortex tube; and a ... | 09/04/2007 |
| 7230542 | Streamlining data transfer to/from logging while drilling tools The invention provides a more efficient way to transfer data to or from a logging tool during a drilling process. A memory module is provided for rapid insertion and retrieval from a logging while drilling tool between drilling runs. The memory module records and st... | 06/12/2007 |
| 7188685 | Hybrid rotary steerable system A bottom hole assembly is rotatably adapted for drilling directional boreholes into an earthen formation. It has an upper stabilizer mounted to a collar, and a rotary steerable system. The rotary steerable system has an upper section connected to the collar, a steer... | 03/13/2007 |
| 7168507 | Recalibration of downhole sensors In downhole drilling tools, a first set of inexpensive and/or relatively small sensors that typically have lower accuracy and higher drift than conventional downhole sensors are located in the drill string adjacent to the bit. A second set of highly accurate sensors... | 01/30/2007 |
| 7168510 | Electrical transmission apparatus through rotating tubular members The present invention provides an apparatus for the communication of power or data signals across the rotating gap of two tubular members, such as the stator and rotor of a mud motor, and between said rotating members of a drill string through inductive couplers loc... | 01/30/2007 |
| 7154411 | Reservoir management system and method A remote sensing unit for sensing subsurface formation is provided. The remote sensing unit is an active device with the capability of responding to control commands to determine subsurface formation characteristics, and transmitting corresponding data values. Some ... | 12/26/2006 |
| 7151377 | Permanent apparatus for monitoring a well by injecting current through the casing into the formations Apparatus for monitoring an underground formation through which a borehole passes, comprises a conductive casing (6) located in the borehole (1) passing through the formation (4); a plurality of sensors (12-1) for measuring an elec... | 12/19/2006 |
| 7150188 | Non-invasive measurement of fluid-pressure diffusivity using electro-osmosis An apparatus for determining fluid-pressure diffusivity in a borehole (12) in a formation (10) includes an electrode (16) and a strain measuring device (18),(20) (or a particle velocity measuring device (18),(20) or a... | 12/19/2006 |
| 7149146 | Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements The invention provides a method for estimating an impedance of a material behind a casing wall, wherein the casing is disposed in a borehole drilled in a geological formation, and wherein a borehole fluid is filling said casing, the material being disposed in an ann... | 12/12/2006 |
| 7148693 | Process and device for prospecting a porous geological formation A porous geological formation contains electrolytic fluid. During the geophysical prospecting of the formation, a region of interest of the formation where the electrolytic fluid is found is stimulated with an excitation signal. The excitation signal corresponds to ... | 12/12/2006 |
| 7140434 | Sensor system A sensor for installation in an underground well having a casing or tubing installed therein, the sensor comprising: a sensor body that can be installed in a hole formed in the casing or tubing so as to extend between the inside and outside of the casing or tubing; ... | 11/28/2006 |
| 7131210 | Borehole caliper tool A borehole caliper tool includes a tool body and an arm coupled to the tool body. The arm is deflectable relative to the tool body. The caliper tool further includes a cam coupled to the arm such that a position of the cam changes as the arm deflects. The caliper to... | 11/07/2006 |
| 7129704 | System for monitoring salinity in a water well A well (10) for producing water is characterized in that it includes a network of widely spaced electrodes (8) electrically coupled with measurement means (3) or with electric current generation means (1). By utilizing a measurement resul... | 10/31/2006 |
| 7124029 | Method for evaluating formation properties Methods for evaluating the properties of formations surrounding a borehole, include the steps of measuring electrical properties of the formation from within the borehole; deriving a model of parameters of the formation surrounding the borehole; and estimating the p... | 10/17/2006 |
| 7119544 | Method and a tool for electrically investigating a wall of a borehole in a geologic formation A method for electrically investigating a wall of a borehole in a geologic formation including injecting a current into the formation at a first position along the wall and returning the current at a second position along the wall, the formation current having a fre... | 10/10/2006 |
| 7114386 | Method and apparatus for acquiring data in a hydrocarbon well in production To acquire data such as the flow rate of various phases of a fluid flowing in a hydrocarbon well (12) in production, in particular in an inclined or horizontal portion of the well, both the local speed of the fluid and the proportions of the various phases ar... | 10/03/2006 |
| 7112783 | Neutron measurement method for determining porosity of a formation surrounding a borehole The invention concerns a neutron measurement method for determining porosity of an earth formation surrounding a borehole comprising: conveying a tool along said borehole, wherein said tool comprises a source of neutron radiation a... | 09/26/2006 |
| 7113051 | Frequency characterization of quartz crystals Techniques for determining a frequency profile of a quartz crystal in real time. Quartz crystals are subjected to a series of temperature cycles at various temperature rates and the crystal frequencies, crystal temperature parameters, and the temperature rates are m... | 09/26/2006 |
| 7105805 | Apparatus and a method for characterizing multiphase effluents An apparatus for characterizing an effluent formed by a multiphase fluid mixture is described, said apparatus comprising a source emitting gamma rays at a plurality of energy levels through said effluent towards a detector block that takes account of the photons it ... | 09/12/2006 |
| 7100450 | Method for correcting pressure measurement for the influence of temperature in a sapphire gauge The invention concerns a method for correction with temperature in the pressure determination of a pressure gauge, comprising: measuring simultaneously with said gauge said pressure Pm(t) and said temperature Tm | 09/05/2006 |
