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| Number | Title | Issue Date |
| 8154950 | Method for displaying geologic stress information and its application to geologic interpretation A method for displaying geologic stress includes determining magnitudes and directions of principal stresses at at least one a selected location. An analog symbol is generated for each magnitude and direction of the principal stresses. The analog symbols include a m... | 04/10/2012 |
| 8151893 | Sleeve assembly for downhole tools An example method comprises securing a sleeve around at least a portion of a downhole tool, deploying the sleeve and the downhole tool into a wellbore penetrating a subterranean formation, and retrieving the sleeve and the downhole tool from the wellbore. The step o... | 04/10/2012 |
| 8146416 | Methods and apparatus to perform stress testing of geological formations Example methods and apparatus to perform stress testing of geological formations are disclosed. A disclosed example downhole stress test tool for pressure testing a geological formation comprises first and second packers selectively inflatable to form an annular reg... | 04/03/2012 |
| 8095318 | Method for estimating formation dip using combined multiaxial induction and formation image measurements A method for determining dip of rock formations penetrated by a wellbore using multiaxial induction measurements and imaging measurements made from within the wellbore includes estimating dip from the multiaxial induction measurements. Dip is also estimated from the... | 01/10/2012 |
| 8069879 | Hydrocarbon application hose A hydrocarbon application hose to avoid substantial compression and blow-out resulting from high pressurization differentials therethrough. The hose is formed from an inner tube that has a layer of material with electromagnetic target, such as carbon fiber, disburse... | 12/06/2011 |
| 8051775 | Detonation to igniter booster device A detonating device includes a high explosive portion comprising high explosive; a low explosive portion comprising low explosive; and a transition portion between the high explosive portion and the low explosive portion, wherein the transition portion comprises a m... | 11/08/2011 |
| 8024957 | Downhole load cell A downhole load cell calibrated for enhanced accuracy. The load cell may be a dry load cell calibrated by storage of pre-determined temperature and pressure data relative to the load cell based on known loads applied thereto. Thus, surface equipment employed with th... | 09/27/2011 |
| 7934548 | Spooled device retaining system An embodiment of a system for preventing the loss of a spooled device into a wellbore comprises a housing defining an aperture extending therethrough, the aperture sized for allowing the spooled device to pass therethrough, a sensor to measure at least one condition... | 05/03/2011 |
| 7900893 | Electronic control for winch tension A method for controlling the tension in a spooled device disposed on a winch, comprises providing an input signal to a controller indicative of a measured tension in the spooled device, providing an input signal to the controller indicative of a desired tension in t... | 03/08/2011 |
| 7886834 | Anchoring system for use in a wellbore A technique enables anchoring of a tool in a wellbore. The technique utilizes one or more arms pivotably mounted to a structure for movement between a radially inward position and radially outward position that anchors the tool to a surrounding wall. A wedge compone... | 02/15/2011 |
| 7874372 | Well access line positioning assembly An assembly for positioning a well access line in a well. The assembly is located between a supply of well access line and a well, with the line running through the assembly and to the well. Multiple pulleys are incorporated into the assembly about which a well acce... | 01/25/2011 |
| 7874359 | Methods of retrieving data from a pipe conveyed well logging assembly A method of performing a pipe conveyed well logging operation is provided that includes providing a pipe conveyed well logging assembly having a pipe string, a memory logging tool and a memory module; deploying the assembly into a wellbore; operating the memory logg... | 01/25/2011 |
| 7787525 | Method and apparatus for transmission of well-bore data on multiple carrier frequencies A wireline telemetry system and method of transmitting data on multiple carrier frequencies. The system and method adjust power level and number of bits-per-carrier to optimally or near-optimally utilize the capacity of the wireline cable. Due to the nature of wirel... | 08/31/2010 |
| 7699124 | Single packer system for use in a wellbore A technique involves collecting formation fluids through a single packer having at least one drain located within the single packer. The single packer is designed with an outer layer that expands to create a seal with a surrounding wellbore wall. The drain is locate... | 04/20/2010 |
| 7699114 | Electro-optic cablehead and methods for oilwell applications An oil and gas well assembly is provided that includes a wireline cable having at least one optical fiber; a downhole tool having at least one optical fiber; and a cablehead having a first end connected to the wireline cable, a second end connected to the downhole t... | 04/20/2010 |
| 7673525 | Sensor system for pipe and flow condition monitoring of a pipeline configured for flowing hydrocarbon mixtures Embodiments of the present invention provide systems and methods for reliable and accurate flow assurance and pipeline monitoring. More specifically but not by way of limitation, systems and methods of the present invention provide for using Doppler profiles through... | 03/09/2010 |
| 7669653 | System and method for maintaining zonal isolation in a wellbore The invention concerns a system or a method for maintaining zonal isolation in a wellbore. According to the invention, the system comprises, at a specific location along said wellbore, a sealing element, said sealing element being able to deform both during and afte... | 03/02/2010 |
| 7667462 | Nuclear magnetic resonance module A nuclear magnetic resonance apparatus that may be used in connection with a variety of different tools, including a down-hole side-wall coring tool as well as with manufacturing process controllers. In one embodiment, the nuclear magnetic resonance apparatus may in... | 02/23/2010 |
| 7665356 | Pressure interference testing for estimating hydraulic isolation A cased hole pressure test tool is used to determine the integrity of cement between two points in a borehole in terms of permeability or transmissibility. The test tool drills at least one probe hole through the casing up to the cement. In one embodiment, two probe... | 02/23/2010 |
| 7660198 | Passive seismic event detection A method of identifying passive seismic events in seismic data that contains at least first seismic data traces acquired at a first seismic receiver and second seismic data traces acquired at a second receiver spatially separated from the first receiver comprises de... | 02/09/2010 |
| 7658092 | Heat switch for chromatographic system and method of operation A heat switch for remote self-contained gas chromatography is disclosed. The device mechanically separates a hot or cold reservoir from the chromatography column when heating or cooling is not needed. The column needs a cooling system to obtain initial temperatures ... | 02/09/2010 |
| 7655604 | Process of hydraulic fracturing using a viscoelastic wellbore fluid Hydraulic fracturing of a subterranean hydrocarbon reservoir is carried out using an aqueous wellbore fluid which is an aqueous solution of a surfactant which has the formula (R1—X)nZ, where R1 is an aliphatic group comprising a C | 02/02/2010 |
| 7654130 | Gas chromatography system architecture incorporating integrated thermal management A self-contained micro-scale gas chromatography system that includes a plurality of gas chromatography components arranged on a micro-fluidic platform with nearly zero dead volume “tubeless” fluidic connections for the gas chromatography components. The micro-fl... | 02/02/2010 |
| 7650799 | Method and apparatus for investigating a gas-liquid mixture A method and system are provided for investigating a gas-liquid fluid mixture as it is conveyed in a conduit having a first constriction region providing a reduced conduit cross section. The method and system include inducing the mixture to exhibit swirling flow in ... | 01/26/2010 |
| 7649805 | Dispersion extraction for acoustic data using time frequency analysis This invention pertains to the extraction of the slowness dispersion characteristics of acoustic waves received by an array of two or more sensors by the application of a continuous wavelet transform on the received array waveforms (data). This produces a time-frequ... | 01/19/2010 |
| 7649804 | In-situ determination of yield stress state of earth formations Determination of in-situ rock yield stress state of a geological formation surrounding a borehole includes determining a profile for each of an axial effective, a radial effective, and a hoop effective stress within at least one axial plane containing a borehole axi... | 01/19/2010 |
| 7647183 | Method for monitoring seismic events A microseismic method of monitoring fracturing operation or other microseismic events in hydrocarbon wells is described using the steps of obtaining multi-component signal recordings from a single monitoring well in the vicinity of a facture or event; and rotating o... | 01/12/2010 |
| 7644761 | Fracturing method for subterranean reservoirs A method of creating multiple fractures in a well traversing a formation is described using pressurized fluids in a highly deviated or horizontal section of the well at a pressure above the fracturing pressure of the formation, wherein for creating a fracture the pr... | 01/12/2010 |
| 7642785 | Method and device for complex permittivity measurements as a function of frequency An apparatus for use in a system that includes a network analyzer for determining a property, such as dielectric permittivity of a sample material as a function of frequency, the apparatus including: a cylindrical chamber for receiving the sample; a coaxial connecto... | 01/05/2010 |
| 7638957 | Single drive betatron A betatron includes a betatron magnet with a first guide magnet having a first pole face and a second guide magnet having a second pole face. Both the first and the second guide magnet have a centrally disposed aperture and the first pole face is separated from the ... | 12/29/2009 |
| 7637151 | Enhanced downhole fluid analysis The operation, analysis and interpretation of a chromatographic system can be significantly enhanced by coupling therewith one or more fluid property measurements that provides an initial indication of the fluid type, the presence of any contamination, an estimate o... | 12/29/2009 |
| 7630517 | Computer-based generation and validation of training images for multipoint geostatistical analysis A computer-implemented method is provided that automatically characterizes and verifies stationarity of a training image for use in multipoint geostatistical analysis. The stationarity is preferably characterized by statistical measures of orientation stationarity, ... | 12/08/2009 |
| 7623412 | Anisotropy measurement while drilling Methods and apparatus facilitating measurement of anisotropy are disclosed. According to some aspects, anisotropy can be determined while drilling. Monopole/quadrupole interactions, as well as monitoring dipole excitations and other methods, may be used to find the ... | 11/24/2009 |
| 7622919 | Nuclear magnetic resonance measurement techniques in non-uniform fields Methods and pulse sequences for facilitating nuclear magnetic resonance (NMR) measurements in grossly inhomogeneous fields. Methods and pulse sequences according to the invention may be used to accurately measure variables such as transverse relaxation time, longitu... | 11/24/2009 |
| 7622916 | Detector A casing position locator for detecting structural features of a borehole casing, the locator including: a plurality of field generators for generating respective dynamic magnetic fields which combine to provide a dynamic test magnetic field to interact with the cas... | 11/24/2009 |
| 7617891 | Mechanical crawler A self-propelled mechanical crawler adapted to move on a medium. One example of such a crawler includes a foot, a wave generator adapted to drive a periodic wave in the foot, and a wave transfer mechanism coupled between the wave generator and the foot. The wave tra... | 11/17/2009 |
| 7610970 | Apparatus for eliminating net drill bit torque and controlling drill bit walk A drilling apparatus controls or eliminates reaction torque from drill bits thereby preventing loss of penetration due to undesired rotation of the drilling apparatus or controls drilling direction by intentionally manipulating reaction torque thereby inducing desir... | 11/03/2009 |
| 7607358 | Flow rate determination of a gas-liquid fluid mixture Methods and systems are described for determining a flow rate of a gas-liquid fluid mixture in a conduit. In the described systems and methods, the fluid mixture is conditioned so that the liquid in the mixture is separated from the gas in the mixture. Properties of... | 10/27/2009 |
| 7607303 | Zero emission natural gas power and liquefaction plant A zero-emissions power plant receives natural gas from wells at elevated pressure and temperature. Gas is expanded through one or more turbo-expanders, preferably reformed, and sent to a fuel cell where electricity, heat, carbon-dioxide, and water are generated. The... | 10/27/2009 |
| 7600419 | Wellbore production tool and method A production logging tool for measuring at least one property of a surrounding fluid in a wellbore, comprising a shaft and a rotatable member coupled to the shaft, the rotatable member comprising a sensor component, the arrangement being such that on rotation of the... | 10/13/2009 |
