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| Number | Title | Issue Date |
| 8051910 | Methods of inferring flow in a wellbore A method of inferring flow in a production string includes, monitoring pressure along a perforated production string, and inferring flow from the monitored pressure. ... | 11/08/2011 |
| 8047284 | Determining the use of stimulation treatments based on high process zone stress Methods for determining whether to perform a stimulation treatment on a subterranean zone are disclosed. Process zone stress (“PZS”), indicative of a production potential of the subterranean zone, is determined, and a determination is made as to whether the PZS ... | 11/01/2011 |
| 7921909 | Method for breaking fracture fluids A method includes identifying application parameter(s) including a subterranean formation temperature, determining a breaker particle size in response to the application parameter(s), providing a treatment fluid including a carrier fluid and a granular breaker sized... | 04/12/2011 |
| 7857048 | Method for breaking fracturing fluids A method for breaking a fracturing fluid includes identifying application parameter(s) including a subterranean formation temperature, and determining an acid precursor concentration in response to the application parameter(s). The method further includes providing ... | 12/28/2010 |
| 7753118 | Method and tool for evaluating fluid dynamic properties of a cement annulus surrounding a casing The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in hydraulic contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in press... | 07/13/2010 |
| 7753117 | Tool and method for evaluating fluid dynamic properties of a cement annulus surrounding a casing The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over t... | 07/13/2010 |
| 7360596 | Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other production wells The invention relates to a method for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers (W) in the underground extraction areas (F) of wells and other production drill holes (11) wherein liquid is continuou... | 04/22/2008 |
| 7357180 | Inhibiting effects of sloughing in wellbores Certain embodiments provide a method for treating a subsurface formation. The method includes providing one or more explosives into portions of one or more wellbores selected for the explosion in the formation. The wellbores are formed in one or more zones in the fo... | 04/15/2008 |
| 7333892 | Method of determining multiphase flow parameters of a porous medium taking account of the local heterogeneity A method with application for evaluation or production of a reservoir for determining multiphase flow parameters of a porous medium such as a rock, from the interpretation of displacement experiments. From an injection experiment on a rock sample, the saturation pro... | 02/19/2008 |
| 7311142 | Apparatus and method for aquiring information while drilling A downhole tool positionable in a wellbore for penetrating a subterranean formation includes a housing having at least one protuberance extending therefrom. The protuberance has at least one centralizing section and a protective section. A probe is positioned in the... | 12/25/2007 |
| 7284604 | Methods for measurement of a dimensional characteristic and methods of predictive modeling related thereto A method of optically determining a change in magnitude of at least one dimensional characteristic of a sample in response to a selected chamber environment. A magnitude of at least one dimension of the at least one sample may be optically determined subsequent to a... | 10/23/2007 |
| 7281422 | Method for borehole conductivity profiling A method of using an everting borehole liner to perform fluid conductivity measurements in materials surrounding a pipe, tube, or conduit, such as a borehole below the surface of the Earth. A flexible liner is everted (turned inside out) into the borehole by introdu... | 10/16/2007 |
| 7273097 | Formation characterization using wellbore logging data Methods for determining formation characteristics comprising establishing baseline casing conditions for a string of casing disposed within a wellbore in a formation and measuring updated casing conditions for the string of casing at a first time interval from the e... | 09/25/2007 |
| 7255166 | Imbibition well stimulation via neural network design A method for stimulation of hydrocarbon production via imbibition by utilization of surfactants. The method includes use of fuzzy logic and neural network architecture constructs to determine surfactant use. ... | 08/14/2007 |
| 7228902 | High data rate borehole telemetry system A system and method for communicating information between downhole equipment in a wellbore and surface equipment, comprising a first device disposed in a wellbore for receiving at least one first signal and transmitting at least one second signal. A surface device i... | 06/12/2007 |
| 7228900 | System and method for determining downhole conditions The present invention provides a system for determining downhole conditions including a time domain reflectometer (172) that is operable to generate a transmission signal and receive a reflected signal. A tubular (192) is positioned downhole in a downh... | 06/12/2007 |
| 7221158 | Permeability determinations from nuclear magnetic resonance measurements Permeability determinations are made from NMR measurements of a logging tool. The NMR measurements are used to find an observed critical spin—spin relaxation time which is used in conjunction with an in situ determination of surface relaxivity of a rock in order t... | 05/22/2007 |
| 7216720 | Multi-string production packer and method of using the same A production packer comprising a packer body, a flat plate, a sealing element, production tubing, water overflow tubing, gas vent tubing, pump cable pack-off tubing, and an optional pressure transducer port. The flat plate is welded onto the top of the packer body. ... | 05/15/2007 |
| 7216533 | Methods for using a formation tester A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown pist... | 05/15/2007 |
| 7210344 | 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... | 05/01/2007 |
| 7207395 | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f... | 04/24/2007 |
| 7196517 | Combining NMR and density measurements for determining properties of reservoir fluid A method for evaluating formation fluids includes measuring a nuclear magnetic resonance property related to a total volume of the formation fluids, measuring a dielectric property related to an electromagnetic wave travel time, measuring a bulk density, and solving... | 03/27/2007 |
| 7195033 | Method and system for determining and controlling position of valve Apparatuses and methods for accurately determining the position of a sliding or rotational sleeve valve in real time are disclosed. The apparatus comprises fiber optic cable based sensors which are either linearly or circumferentially arrayed in the housing that sur... | 03/27/2007 |
| 7137446 | Fluids comprising reflective particles and methods of using the same to determine the size of a wellbore annulus In embodiments, methods of determining a size of an annulus in a wellbore include: (a) displacing a fluid comprising reflective particles downhole and up through the annulus, wherein the reflective particles make a front end of the fluid visible as it exits the well... | 11/21/2006 |
| 7114562 | Apparatus and method for acquiring information while drilling An apparatus and method useful for acquiring information from a subsurface formation penetrated by a wellbore contemplate the use of a tubular body adapted for connection within a drill string disposed in the wellbore. The tubular body is equipped with one or more p... | 10/03/2006 |
| 7077200 | Downhole light system and methods of use A light generating system for use in a wellbore comprising a light generating transducer in the wellbore, the light generating transducer adapted to transform a physical state of a parameter in the wellbore to optical energy; recording equipment sensitive to optical... | 07/18/2006 |
| 7075297 | Combining NMR, density, and dielectric measurements for determining downhole reservoir fluid volumes A method for evaluating formation fluids includes measuring a nuclear magnetic resonance property related to a total volume of the formation fluids, measuring a dielectric property related to an electromagnetic wave travel time, measuring a bulk density, and solving... | 07/11/2006 |
| 7066586 | Ink refill and recharging system Ink refill systems are disclosed. In general, an ink source comprising a saturated zone and a tubarc porous microstructure for conducting ink from the saturated zone to an unsaturated zone are provided. The ink can be delivered from the saturated zone to the unsatur... | 06/27/2006 |
| 7059404 | Variable intensity memory gravel pack imaging apparatus and method An apparatus and method are provided for varying an operating parameter for a nuclear gamma ray tool for evaluating the integrity of gravel packing. The gamma ray outpat intensity and area of investigation are altered by changing a source housing geometry and the ma... | 06/13/2006 |
| 7031841 | Method for determining pressure of earth formations A method for determining formation pressure at a depth region of formations surrounding a borehole, including: keeping track of the time since cessation of drilling at the depth region; deriving formation permeability at the depth region; causing wellbore pressure t... | 04/18/2006 |
| 7022241 | Gas-gas-water treatment system for groundwater and soil remediation A sparging system for in-situ groundwater remediation for removal of contamination including dissolved chlorinated hydrocarbons and dissolved hydrocarbon petroleum products including the use in injection wells of microfine bubble generators, matched to substrates of... | 04/04/2006 |
| 7011155 | Formation testing apparatus and method for optimizing draw down A method and apparatus for of determining a formation parameter of interest. The method includes placing a tool into communication with the formation to test the formation, determining a first formation characteristic during a first test portion, initiating a second... | 03/14/2006 |
| 6983803 | Equalizer valve and associated method for sealing a fluid flow A dirty fluid valve for sealing high differential fluid pressures in a drilling environment and methods for using such a valve is disclosed. One embodiment of the valve includes a seal cartridge having several openings for directing a fluid path through the cartridg... | 01/10/2006 |
| 6918404 | Irrigation and drainage based on hydrodynamic unsaturated fluid flow Irrigation and drainage systems are disclosed, including a saturated zone and at least one pipe in communication with the saturated zone. The pipe(s) can be configured to comprise a tubarc porous microstructure for conducting water from the saturated zone to an unsa... | 07/19/2005 |
| 6912898 | Use of cesium as a tracer in coring operations A method for measuring the infiltration of coring fluid into a core sample taken from a formation comprises a) providing a coring fluid containing cesium in a first concentration, b) using the coring fluid and a coring means to generate the core sample, c) determini... | 07/05/2005 |
| 6910374 | Borehole conductivity profiler A method of using an everting borehole liner to perform fluid conductivity measurements in materials surrounding a pipe, tube, or conduit, such as a borehole below the surface of the Earth. A flexible liner is everted (turned inside out) into the borehole with an in... | 06/28/2005 |
| 6827861 | Gas-gas-water treatment system for groundwater and soil remediation A sparging system for in-situ groundwater remediation for removal of contamination including dissolved chlorinated hydrocarbons and dissolved hydrocarbon petroleum products including the use in injection wells of microfine bubble generators, matched to substrates of... | 12/07/2004 |
| 6755246 | In-situ heavy-oil reservoir evaluation with artificial temperature elevation Many reservoirs of interest include heavy oil. In such reservoirs, parti at normal temperatures, many instruments commonly used for formation evaluation may not be able to distinguish between heavy oil and bound water in the formation. Passive or active heating is u... | 06/29/2004 |
| 6675892 | Well testing using multiple pressure measurements A technique includes measuring a first pressure of well fluid in a first region. The well fluid is produced from a formation into the first region. A second pressure of well fluid is measured in a second region. The second region is isolated from the firs... | 01/13/2004 |
| 6672386 | Method for in-situ analysis of formation parameters A method of performing a formation rate analysis from pressure and formation flow rate data. Pressure and flow rate data are measured as fluid is withdrawn from a formation. Variable system volume is accounted for. The pressure and flow rate data are corr... | 01/06/2004 |
