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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7511266 | Irradiated formation tool (IFT) apparatus and method A well logging instrument that has a neutron source for irradiating earth formations traversing a borehole used in deriving useful information pertaining to said formations. Three detectors are mounted in a spaced-apart vertical relationship within a pressure-resist... | 03/31/2009 |
| 7372018 | Determination of gas pressure and saturation simultaneously A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at constant gas saturation, or to determine both gas saturation and gas pr... | 05/13/2008 |
| 7365307 | Sigma/porosity tools with neutron monitors A tool for formation logging includes a support configured for movement in a borehole; a neutron source disposed on the support; a neutron monitor disposed on the support and configured to monitor an output of the neutron source; a gamma-ray detector disposed on the... | 04/29/2008 |
| 7365308 | Measurement of formation gas saturation in cased wellbores using pulsed neutron instrumentation A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at constant gas saturation, or to determine both gas saturation and gas pr... | 04/29/2008 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 7361887 | Measurement of formation gas pressure in cased wellbores using pulsed neutron instrumentation A pulsed neutron tool with three or more detectors is used for making measurements inside casing. The measurements may be used to determine gas saturation at a constant gas pressure, pressure at constant gas saturation, or to determine both gas saturation and gas pr... | 04/22/2008 |
| 7342222 | Method and apparatus for downhole spectroscopy processing A method for downhole spectroscopy processing is described. The method includes: obtaining raw spectroscopy data using a downhole tool; processing the raw spectroscopy data using the downhole tool to obtain a downhole processed solution; transmitting the downhole pr... | 03/11/2008 |
| 7334465 | Integrated logging tool for borehole An apparatus for measuring characteristics of earth formations surrounding a borehole, comprises a resistivity measurement device having a multiplicity of antennae spaced between each other in a longitudinal direction of the apparatus. A neutron measurement device o... | 02/26/2008 |
| 7328106 | Method of correcting density logs for the presence of the casing A gas detection method includes carrying out respective neutron and density logs, using neutron and density detectors, along a length of well. The density log is corrected for the dimensions and properties of the well casing. The corrected density log is then combin... | 02/05/2008 |
| 7321123 | Method and apparatus for radiation detection in a high temperature environment A radiation detector operating at high temperatures is shown comprising a LuAP scintillating material for producing light when excited by incident radiation, a photocathode, and an electron multiplier. The photocathode is deposited directly onto the surface of the s... | 01/22/2008 |
| 7294840 | Apparatus and method for reducing microphonic susceptibility in a radiation detector The invention provides a system for removing or minimizing microphonic noise from a radiation detector signal, such as from a neutron detector, without creating excessive false counts in the electronics that count the radiation events. The system solves the micropho... | 11/13/2007 |
| 7294829 | Method and apparatus for an improved formation density indicator using pulsed neutron instruments A pulsed neutron source is used in a density logging tool with three or more detectors. This enables compensation for source variations and provides redundant measurements that are used to make borehole corrections and/or corrections for casing. ... | 11/13/2007 |
| 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 |
| 7282704 | Method for determining formation porosity and gas saturation in a gas reservoir Measurements made with porosity and density logging tools in a gas reservoir may differ due to invasion effects. The effects are particularly large on measurement-while-drilling applications where invasion is minimal. Using a Monte-Carlo method, a relationship is es... | 10/16/2007 |
| 7253401 | Spectral gamma ray logging-while-drilling system A method for determining concentrations of naturally occurring radioactive elements in earth formation by analysis of gamma ray energy spectra measured by at least one gamma ray detector while the borehole is being drilled. Gain of the gamma ray detector is controll... | 08/07/2007 |
| 7251939 | General method for disposal of produced water A method and apparatus useful for disposing of the high volumes of produced water associated with coal bed methane natural gas wells. The method taught is to create steam from the produced water and vent the steam into the atmosphere. The apparatus taught utilizes a... | 08/07/2007 |
| 7253402 | Apparatus and method for determining thermal neutron capture cross section of a subsurface formation from a borehole using multiple detectors A well logging instrument including a plurality of detectors having different precisions and accuracies, the more precise detectors generally having lower accuracies. The detectors are responsive to the interaction of radiation from a suitable source on the instrume... | 08/07/2007 |
| 7148471 | Well logging apparatus and method for measuring formation properties A logging tool includes an elongated body housing a neutron source and at least one neutron detector positioned along one side of the neutron source. Some embodiments of the logging tool include at least one gamma ray detector longitudinally separated from and to on... | 12/12/2006 |
| 7139350 | Method and apparatus for measuring radiation in a borehole Apparatus and methods for measuring radiation in a borehole environment using a YAlO3:Ce (YAP) scintillation crystal. Borehole instruments are disclosed which employ a gamma ray detector comprising a YAP scintillator coupled to a light sensing means such ... | 11/21/2006 |
| 7129477 | Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement A logging-while-drilling density sensor includes a gamma ray source and at least two NaI detectors spaced apart from the source for determining measurements indicative of the formation density. An acoustic caliper is used for making standoff measurements of the NaI ... | 10/31/2006 |
| 7117092 | Pulsed-neutron formation density A method and related system of determining formation density by compensating actual inelastic gamma rays detected from a pulsed-neutron tool for the effects of neutron transport. The method and systems may model response of the tool and use the modeled response as a... | 10/03/2006 |
| 7073582 | Method and apparatus for positioning a downhole tool A tool positioning assembly for positioning downhole tools at desired locations within a wellbore. The current invention further provides methods for using a tool positioning assembly. The tool positioning assembly and methods for using the same reduce the number of... | 07/11/2006 |
| 7073378 | Integrated logging tool for borehole An apparatus for measuring characteristics of earth formations surrounding a borehole, comprises a resistivity measurement device having a multiplicity of antennae spaced between each other in a longitudinal direction of the apparatus. A neutron measurement device o... | 07/11/2006 |
| 7073595 | Method and system for controlling pressure in a dual well system A method for controlling pressure of a dual well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone using a drill string. The articulated w... | 07/11/2006 |
| 7071697 | Centralizer including measurement means A centralizer (1) for position a casing (3) in a conduit (4) passing through underground formations includes measurement means (7) such as an electrode for deriving at least one representative parameter of the formations. ... | 07/04/2006 |
| 7048049 | Slant entry well system and method A system for accessing a subterranean zone from the surface includes an entry well bore extending down from the surface. A plurality of slanted well bores extend from the entry well bore to the subterranean zone. Drainage patterns extend from the slanted well bores ... | 05/23/2006 |
| 7025154 | Method and system for circulating fluid in a well system A method for circulating drilling fluid in a well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone. The articulated well bore is horizont... | 04/11/2006 |
| 7025137 | Three-dimensional well system for accessing subterranean zones A drainage system for accessing multiple subterranean zones from the surface includes an entry well extending from the surface. The system also includes two or more exterior drainage wells extending from the entry well through the subterranean zones. The exterior dr... | 04/11/2006 |
| 7021836 | Attenuator and conditioner An apparatus and method of attenuating and/or conditioning optical energy for an optical transmitter, receiver or transceiver module is disclosed. An apparatus for attenuating the optical output of an optoelectronic connector including: a mounting surface; an array ... | 04/04/2006 |
| 6967330 | High-density polycrystalline lutetium silicate materials activated with Ce This invention encompasses the oxides of lutetium and silicon in various proportions and containing a dopant, optionally cerium, fabricated in the form of a translucent ceramic, and methods of manufacture and use of such ceramic. ... | 11/22/2005 |
| 6964308 | Method of drilling lateral wellbores from a slant well without utilizing a whipstock In accordance with one embodiment of the present invention, a method for drilling a lateral wellbore from a slant well includes drilling the slant well below the surface of the earth such that the slant well is angled toward a first horizontal direction that coincid... | 11/15/2005 |
| 6927407 | Radiation shielding arrangement A radiation shielding arrangement for shielding high-energy neutron radiation and gamma radiation from high-energy particle accelerators or storage rings includes a shielding element made of water-containing material, for example with chemically bound water or water... | 08/09/2005 |
| 6909969 | Method of through-casing gas detection A gas detection method includes carrying out respective neutron and density logs, using neutron and density detectors, along a length of well. The density log is corrected for the dimensions and properties of the well casing. The corrected density log is then combin... | 06/21/2005 |
| 6903330 | Multi-point subsurface measurement calibration Techniques for calibrating well-logging sensors comprising emitting a first signal into a first calibration substance disposed proximate to the sensor, measuring a first sensor response from the first signal, emitting a second signal into a second calibration substa... | 06/07/2005 |
| 6665616 | Method for determining decay characteristics of multi-component downhole decay data Measurements from many logging instruments such as Gamma ray counts from a pulsed neutron instrument, typically have a spectrum that contains a plurality of exponentially decaying components. The slowest decaying component is obtained by fitting a single ... | 12/16/2003 |
| 6590202 | Standoff compensation for nuclear measurements A nuclear logging-while-drilling measuring systems, and the correction of the formation property measurements for adverse effects of instrument standoff from the borehole wall, is disclosed. Detector responses for one or more downhole detectors are sample... | 07/08/2003 |
| 6011266 | Apparatus and method for the simultaneous detection of neutrons and ionizing electromagnetic radiation A sensor for simultaneously detecting neutrons and ionizing electromagnetic radiation comprising: a sensor for the detection of gamma radiation, the sensor defining a sensing head; the sensor further defining an output end in communication with the sensin... | 01/04/2000 |
| 6005244 | Detecting bypassed hydrocarbons in subsurface formations A tool for use in analyzing a subsurface formation for the presence of hydrocarbon includes a neutron generator capable of generating a burst of neutrons at a high energy level, some of which will collide inelastically with atomic nuclei in the subsurface... | 12/21/1999 |
| 5804820 | Method for determining density of an earth formation Apparatus for determining the density of underground formations surrounding a borehole, such as a wireline logging tool or a logging-while-drilling tool, includes a neutron source for irradiating the formations from within the borehole and at least one de... | 09/08/1998 |
| 5684299 | Method for determining porosity in an invaded gas reservoir The formation porosity of a partially invaded gas reservoir in subsurface earth formation is determined from the sum of percentages of density and neutron tool porosities. During the method of this invention, density tool and neutron tool porosity measure... | 11/04/1997 |
