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| Number | Title | Issue Date |
| 7320367 | Annular isolators for expandable tubulars in wellbores The present disclosure addressed apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. Annular seal means are carried in or on production tubing as it is run into a borehole. In conjunction with expansion of the... | 01/22/2008 |
| 7299882 | Annular isolators for expandable tubulars in wellbores The present disclosure addressed apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. Annular seal means are carried in or on production tubing as it is run into a borehole. In conjunction with expansion of the... | 11/27/2007 |
| 7252153 | Bi-directional fluid loss device and method A fluid loss device including a flapper and seat assembly that provide a seal on a lower flapper surface when the flapper is closed and resists pressure in either direction. The flapper and seat assembly is spring biased to contact a flapper support above the flappe... | 08/07/2007 |
| 7252142 | Annular isolators for expandable tubulars in wellbores The present disclosure addressed apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. Annular seal means are carried in or on production tubing as it is run into a borehole. In conjunction with expansion of the... | 08/07/2007 |
| 7109134 | Fusible quilt batt A fusible quilt batt. The fusible batt includes a non-woven fibrous web and a heat sealable and releasable adhesive. The adhesive is coated on the outer surface of the web and insinuates between the fibers of the web internally. The adhesive thus binds the fibers of... | 09/19/2006 |
| 6998999 | Hybrid piezoelectric and magnetostrictive actuator An electromechanical transducer formed by an electrical and mechanical combination of a piezoelectric device and a magnetostrictive device. The two devices are electrically coupled so that their capacitive and inductive reactances approach a balance to provide an es... | 02/14/2006 |
| 6944011 | Electronic device cable cover The present disclosure addresses a cover for cables extending from an electronic device. The cover may be a one-piece cover having a horizontal top and vertical sides. The top has a width dimension corresponding to the width of an electronic device and the sides hav... | 09/13/2005 |
| 6935432 | Method and apparatus for forming an annular barrier in a wellbore In accordance with the present invention, an apparatus and method are provided which utilize an expandable media assembly to create an annular barrier in a subterranean well. The apparatus comprises a tubing assembly for placement in the wellbore, the tubing assembl... | 08/30/2005 |
| 6862943 | Water filter media sampler A sampler for collecting vertically continuous media samples from aggregate liquid filtering systems. The sampler includes a sample collecting lower section have an inner member rotatably carried within an outer member. These lower members have slots which may be al... | 03/08/2005 |
| 6854522 | Annular isolators for expandable tubulars in wellbores The present disclosure addressed apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. Annular seal means are carried in or on production tubing as it is run into a borehole. In conjunction with expansion of the... | 02/15/2005 |
| 6823711 | Static and dynamic calibration of quartz pressure transducers A system and method for dynamically calibrating signals from a quartz pressure sensor to correct for temperature transients. A series of differences of time spaced temperature readings is stored in a tapped delay line and coupled to a transfer function. The transfer... | 11/30/2004 |
| 6817229 | Acoustic sensor for fluid characterization A method and apparatus for in-situ characterization of downhole fluids in a wellbore using ultrasonic acoustic signals. Measurements of the speed of sound, attenuation of the signal, and acoustic back-scattering are used to provide qualitative and quantitative data ... | 11/16/2004 |
| 6792866 | Circular shaped charge A circular shaped charge and methods of manufacture, shipping and assembly. An circular shaped charge is manufactured as two separate charge halves, upper and lower, and a separate continuous liner or pair of continuous half liners. Preferably, each charge half is f... | 09/21/2004 |
| 6745844 | Hydraulic power source for downhole instruments and actuators Disclosed is a system for using pressure differential between completion fluid in an oil well and produced fluids to power downhole devices, including instruments and actuators. A conduit is provided bypassing a packer which seals a production string to a well casin... | 06/08/2004 |
| 6209641 | Method and apparatus for producing fluids while injecting gas through the same wellbore Method and apparatus for producing a first zone through a wellbore while simultaneously injecting gas into a second zone through the same wellbore. The production stream is produced to the surface through a string of tubing where gas is separated therefro... | 04/03/2001 |
| 5663073 | Earth formation porosity estimation method A method for determined porosity of an earth formation surrounding a borehole without prior knowledge of formation lithology. Neutron logging tools are used to measure thermal neutron porosity, epithermal neutron porosity and formation absorption cross se... | 09/02/1997 |
| 5515335 | Seismic trace overburden correction method A method for generating improved displays of seismic data by processing seismic amplitude versus offset data to correct for overburden effects. Analytic traces are calculated for the zero offset reflectivity, A, trace and the amplitude versus offset slope... | 05/07/1996 |
| 5474129 | Cavity induced stimulation of coal degasification wells using foam An improved method for stimulating coal degasification wells comprising the injection of a foam into a coal seam which contains natural or induced fractures. Thereafter, high pressure gas is injected into the coal seam and suddenly released to cause disin... | 12/12/1995 |
| 5440525 | Seismic data hydrocarbon indicator A method for displaying seismic data to provide direct indications of the presence of hydrocarbons. Seismic data is processed using conventional amplitude versus offset techniques to obtain zero offset reflectivity, or A, traces and the amplitude versus o... | 08/08/1995 |
| 5404010 | Method of well logging in fractured subterranean formation In a method of logging a well in a subterranean formation which formation has been fractured by injecting proppant tagged with at least one radioactive material into the formation through the well, the improvement comprising: utilizing a spectral gamma-ra... | 04/04/1995 |
| 5390114 | Isostatically corrected gravity displays A method for producing isostatically corrected gravity displays using available gravity data sets. The values of crustal density, density contrast between lower crust and mantle, and crustal thickness at sea level required for the Airy-Heiskanen equation ... | 02/14/1995 |
| 5365491 | Marine seismic bottom geophone coupling and anchor A marine seismic bottom geophone anchor and coupling device comprising two rectangular fabric sections attached along their edges and along a plurality of lines between edges to form a plurality of pockets. The pockets are filled with a weighting material... | 11/15/1994 |
| 5297108 | Seismic velocity estimation method A method for detecting errors in estimated seismic velocities used in a normal moveout correction of a gather of traces selected from conventional, common midpoint seismic data. Zero offset reflectivity and amplitude versus offset slope traces are derived... | 03/22/1994 |
| 5265680 | Method for installing instruments in wells A method for installing an instrument at or near the bottom of a cased well. A cavity is formed within the body of a float shoe or float collar positioned at the bottom or near the bottom of a casing string as it is assembled for installation in a well. A... | 11/30/1993 |
| 5258960 | Seismic velocity estimation method A method for detecting errors in estimated seismic velocities used in a normal moveout correction of a gather of traces selected from conventional, common midpoint seismic data. Zero offset reflectivity and amplitude versus offset slope traces are derived... | 11/02/1993 |
| 5255736 | Air flow enhancing stack An improved air flow enhancing stack for use with an air cooled heat exchanger designed for natural convection cooling. The stack includes a lower conical section having a larger end attached to the natural convection air exhaust from the heat exchanger a... | 10/26/1993 |
| 5199766 | Cavity induced stimulation of coal degasification wells using solvents An improved method for stimulating coal degasification wells comprising the use of a coal comminuting solvent to weaken the cleat structure of a coal seam immediately prior to use of high pressure gas in a gas cavitation process. A solvent such as ammonia... | 04/06/1993 |
| 5172591 | Oil well sucker rod load measurement A load measuring system comprising an acoustic transmitting transducer for injecting an acoustic signal into a load bearing portion of a sucker rod, and receiving transducer for detecting the signal after it passes through a known length of a sucker rod, ... | 12/22/1992 |
| 5168942 | Resistivity measurement system for drilling with casing A system for measuring earth formation resistivity while drilling a wellbore through an earth formation using a self-contained drilling assembly supported at the lower end of a casing string. The drilling assembly includes a drilling fluid driven motor dr... | 12/08/1992 |
| 5157334 | Image intensifier monitoring of power line insulator leakage A method for detecting incipient flashover of power line insulators by use of an image intensifier to detect electromagnetic radiation generated by electrical leakage. To improve detection sensitivity, a stimulus such as ultraviolet radiation or an extern... | 10/20/1992 |
| 4970696 | Method for conducting three-dimensional subsurface and marine seismic surveys A method for conducting a three-dimensional subsurface seismic survey utilizing a plurality of seismic receivers arranged in an orthogonally uniform pattern is disclosed. A predetermined pattern of shotpoints is arranged such that every point in the surfa... | 11/13/1990 |
| 4853616 | Detection of water saturation in insulation at cased road crossings A method for detecting water saturation of thermal insulation located between a flowline and metal sheathing at a location where the flowline is positioned in a metal casing. Electrical resistance measurements are made between the metal sheathing and flow... | 08/01/1989 |
| 4853615 | Detection of water saturation in insulation at cased road crossings A method for detecting water saturation of thermal insulation located between a flowline and metal sheathing at a location where the flowline is positioned in a metal casing. Electrical resistance measurements are made between the metal sheathing and flow... | 08/01/1989 |
| 4812766 | Telluric noise cancellation in induced polarization prospecting An improved method and apparatus for detecting telluric noise information while performing induced polarization prospecting. Telluric noise electrodes are positioned on an equipotential line lying about an input current electrode forming part of a convent... | 03/14/1989 |
| 4798660 | Method for forming Cu In Se2 films A method for fabricating a copper indium diselenide semiconductor film comprising use of DC magnetron sputtering apparatus to sequentially deposit a first film of copper on a substrate and a second film of indium on the copper film. Thereafter the substra... | 01/17/1989 |
| 4790883 | Low light level solar cell A photovoltaic cell of the thin film silicon p-i-n class in which a microcrystalline silicon film is used in place of the p or n region of the p-i-n structure and is simultaneously used as the corresponding current collecting film.... | 12/13/1988 |
| 4769086 | Thin film solar cell with nickel back A solar module of the type having at least two series connected solar cells which each include a transparent front-face electrode, a thin film photovoltaic device, and an aluminum back contact. A nickel film is provided over the aluminum back contact to p... | 09/06/1988 |
| 4705113 | Method of cold water enhanced hydraulic fracturing A method of initiating fractures in preselected zones by precooling the zones of interest. A cooling fluid is either circulated in a wellbore at the selected zone or injected into the selected zone. After cooling, conventional fracturing techniques are us... | 11/10/1987 |
| 4688623 | Textured silicon ribbon growth wheel Apparatus for production of semiconductor ribbon materials of the type in which molten material is brought into contact with the surface of a rotating cool wheel or drum wherein the cooling surface of the drum is textured to form a plurality of discrete c... | 08/25/1987 |
| 4635746 | Timing correction methods for seismic energy source operation A method for determining the effective or apparent firing time of a seismic source. The seismic detectors positioned at known distances from the source, but outside the non-linear acoustic region, are used to detect arrivals of energy from the source. The... | 01/13/1987 |
