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| Number | Title | Issue Date |
| 7369144 | Method and device for correcting the rotation of a video display A method for displaying a video image on a display screen by a scanning of the display screen along lines inclined by a first angle with respect to a reference direction by at least one electron beam modulated by a modulation signal. The method includes the steps of... | 05/06/2008 |
| 7336740 | Radio signal receiving method and radio signal receiver A radio signal receiving method grasps features of a propagation path at the start of communication and generates a template waveform corresponding to the features. A receiver examines a reception waveform of a propagation path condition judgment portion contained i... | 02/26/2008 |
| 7266456 | Method for management of multiple wells in a reservoir A method of managing multiple wells connected to a reservoir comprises the steps of: setting production and performance goals for each individual well; monitoring the performance of each individual well; ... | 09/04/2007 |
| 7210342 | Method and apparatus for determining gas content of subsurface fluids for oil and gas exploration A process to analyze fluid entrained in well boreholes. The process includes gathering trap gas samples from return of drilling mud at multiple depths. The process also includes the steps of subjecting the samples to mass spectrometry in order to determine mass to c... | 05/01/2007 |
| 7142986 | System for optimizing drilling in real time A method for optimizing drilling parameters includes obtaining previously acquired data, querying a remote data store for current well data, determining optimized drilling parameters, and returning optimized parameters for a next segment to the remote data store. De... | 11/28/2006 |
| 7062072 | Methods of producing images of underground formations surrounding a borehole A method of producing images of formations surrounding a borehole, comprises: obtaining values of a first parameter in the borehole as a function of depth and azimuth at a first resolution; obtaining values of a second parameter in the borehole as a function of dept... | 06/13/2006 |
| 7028543 | System and method for monitoring performance of downhole equipment using fiber optic based sensors A method and system for monitoring the operation of downhole equipment, such as electrical submersible pumps, is disclosed. The method and system rely on the use of coiled fiber optic sensors, such as hydrophones, accelerometers, and/or flow meters. These sensors ar... | 04/18/2006 |
| 7023337 | Spray gun control operator interface A monitoring system that permits an operator to observe on a visual display operating data for a plurality of dispensing devices. These data displays are visual representations based on signals received from a monitor control. The operator is able to arrange and gro... | 04/04/2006 |
| 7004031 | Ultrasonic sensor An ultrasonic sensor includes a piezoelectric vibrator, a reverberation measuring device and a compensating device. The piezoelectric vibrator vibrates to transmit an ultrasonic wave, receives a reflected wave of the transmitted ultrasonic wave and produces an outpu... | 02/28/2006 |
| 6935424 | Mitigating risk by using fracture mapping to alter formation fracturing process A formation fracturing method with which to mitigate risk to hydrocarbon productivity includes pumping fracturing fluid, during at least part of a fracturing job time period, into a well to fracture a formation; generating signals, within the fracturing job time per... | 08/30/2005 |
| 6920083 | Method intended for detection and automatic classification, according to various selection criteria, of seismic events in an underground formation A method for automatic classification, according to various selection criteria, of seismic or microseismic events picked up by seismic receivers coupled with an underground formation under development, according to whether the events are purely of microseismic natur... | 07/19/2005 |
| 6823297 | Multi-scale finite-volume method for use in subsurface flow simulation A multi-scale finite-volume (MSFV) method to solve elliptic problems with a plurality of spatial scales arising from single or multi-phase flows in porous media is provided. Two sets of locally computed basis functions are employed. A first set of basis functions ca... | 11/23/2004 |
| 6697710 | Gas pipe explorer robot A gas pipe explorer formed of a plurality of connecting elements, and an articulation element between the connected elements. The connected elements include drive capabilities, and the articulation element allows the connected elements to traverse gas pip... | 02/24/2004 |
| 6671600 | Production method using global positioning system A method of producing a projected useful form from an existing body delimited by a three-dimensional envelope using a tool mounted on a machine cooperating with a global satellite positioning system of the bifrequency, differential, kinematic and real tim... | 12/30/2003 |
| 6205087 | Sonic data logging system A sonic logging method involves the pre-processing of a detection signal by a downhole processing device to determine the arrival time of a sonic signal at a receiver which is then transmitted to the surface. A suitable sonic logging downhole tool include... | 03/20/2001 |
| 6147929 | Method for predicting continuous and discontinuous waveguide targets using interwell seismic signature characteristics A method for planning continuity logging surveys and for detecting the presence of a continuous or discontinuous low-velocity inclusion in a subterranean geological formation. To detect the presence of a continuous or discontinuous low-velocity inclusion,... | 11/14/2000 |
| 6078869 | Method and apparatus for generating more accurate earth formation grid cell property information for use by a simulator to display more accurate simulation results of the formation near a wellbore A Petragrid method and apparatus generates grid cell property information that is adapted for use by a computer simulation apparatus. An interpretation workstation includes at least two software programs stored therein: a first program called "Petragrid" ... | 06/20/2000 |
| 6018497 | Method and apparatus for generating more accurate earth formation grid cell property information for use by a simulator to display more accurate simulation results of the formation near a wellbore A Petragrid method and apparatus generates grid cell property information that is adapted for use by a computer simulation apparatus which simulates properties of an earth formation located near one or more wellbores. An interpretation workstation include... | 01/25/2000 |
| 5809163 | Method of characterizing texture heterogeneities of geological formations traversed by a borehole A method of characterizing texture heterogeneities in a geological formation traversed by a borehole. The method records an image of the borehole wall such as that provided by Schlumberger's Formation Microscanner (FMS) apparatus, representative of variat... | 09/15/1998 |
| 5594176 | Scan assembly and method for transferring power and data across a rotary interface An ultrasonic scan assembly for use in inspecting downhole gas pipes comprises a sensor section which rotates in relation to an end section that remains essentially level forming a rotating interface. The sensor section includes at least one ultrasonic tr... | 01/14/1997 |
| 5519668 | Methods and devices for real-time formation imaging through measurement while drilling telemetry Methods for providing an image at the surface of a formation surrounding a borehole in real-time include associating resistivity measurements with a predetermined number of preselected toolface positions. The resistivity measurements are subjected to data... | 05/21/1996 |
| 5239467 | Method for enhancing geophysical data by nonlinear compression of the dynamic range The present invention provides an improved method of processing and displaying geophysical data so as to enhance the evaluation and interpretation of subtle variations in the earth's geological and lithological structures. In particular, the dynamic range... | 08/24/1993 |
| 5237539 | System and method for processing and displaying well logging data during drilling A system and method for processing and displaying well log data that provides real time and lag time data combined into a format which can be graphically printed using a printer interface to a computer during the drilling of an oil and gas well. Preselect... | 08/17/1993 |
| 5179541 | Acoustic borehole televiewer A system is provided for optimizing the output power of an acoustic wavetrain emitted from a transducer rotatably mounted in a downhole borehole televiewer for scanning the sidewall of the borehole. The purpose is to prevent destructive interference betwe... | 01/12/1993 |
| 5164548 | Method and apparatus for ultrasonic scanning of a borehole having improved sensor array and timing circuit A borehole televiewer is modified to provide an improved signal-to-noise ratio by utilizing a series of receivers arranged in a planar array configuration with respect to a centrally located transmitting transducer. The array covers at least a 90° quadra... | 11/17/1992 |
| 5138585 | Method for fluid identification and evaluation within wellbores using ultrasonic scanning A method is disclosed for using data from a borehole televiewer in an active well to determine fluid properties. That method involves determining the wall effects from the data, and factoring out the wall effects from the data to determine the fluid prope... | 08/11/1992 |
| 5134471 | System for monitoring the walls of a borehole using a video camera A borehole camera monitoring system comprises a camera head assembly adapted to be lowered into a borehole by means of a cable and control unit located above ground for generating a control signal for the operation of the camera. The camera head assembly ... | 07/28/1992 |
| 5121363 | Fracture detection logging tool A method and apparatus by which fractured rock formations are identified and their orientation may be determined includes two orthogonal motion sensors which are used in conjunction with a downhole orbital vibrator. The downhole vibrator includes a device... | 06/09/1992 |
| 5038378 | Method and apparatus for smoothing measurements and detecting boundaries of features A method and apparatus are described for removing noise by smoothing fine resistivity measurements made with a tool from inside a borehole penetrating an earth formation. Pixel values representative of the resistivity measurements are examined to determin... | 08/06/1991 |
| 4999817 | Programmable gain control for rotating transducer ultrasonic tools A rotary ultrasonic transducer logging tool is set forth which has a transmitter connected to a transducer for transmitting pulses periodically, and a rotor with angle sensor connected thereto. One full revolution is divided into a specified number of inc... | 03/12/1991 |
| 4991095 | Process for three-dimensional mathematical modeling of underground geologic volumes A process using a stored program processor for modeling a geologic volume which has inclined, stacked layers of sedimentary deposits. The process employs a model volume with layers of cells which are inclined and stacked analogous to the layers of sedimen... | 02/05/1991 |
| 4984221 | Borehole acoustic logging system having automatic reflection signal level control A borehole televiewer employs a transducer energized by repetitive voltage pulses for generating pulses of acoustic energy for transmission to the walls of a borehole and for detecting direct reflections of acoustic energy from the borehole walls. A detec... | 01/08/1991 |
| 4969128 | Borehole acoustic logging system having synchronization An elongated borehole logging tool employs an acoustic energy transducer for directing acoustic energy pulses toward a borehole wall at a repetition rate synchronized with rotational speed of the tool within the borehole.... | 11/06/1990 |
| 4962490 | Acoustic logging method for determining the dip angle and dip direction of a subsurface formation fracture A deviated borehole penetrating a subsurface formation and intersected by a formation fracture is surveyed with a borehole televiewer acoustic logging system. Relative fracture dip angle and dip direction calculated from such survey with respect to the bo... | 10/09/1990 |
| 4916673 | Method and apparatus for detecting the peak of an analog signal A method and apparatus for processing a signal generated by a borehole scanning system of the type in which periodic electrical firing pulses initiate a plurality of corresponding acoustic energy pulses which are transmitted from the central portion of th... | 04/10/1990 |
| 4870627 | Method and apparatus for detecting and evaluating borehole wall fractures A method and apparatus are described for generating a quick look display of an acoustic investigation of a borehole wherein a parameter of interest is derived from vertically spaced sonic receivers and displayed in a laterally continuous display log where... | 09/26/1989 |
| 4867264 | Apparatus and method for investigating wellbores and the like An apparatus useful in investigating the wall surfaces of a structure defining a cavity comprising: a tool having a periphery and being capable of being at least partially located in the cavity; and a plurality of transducers located at different points o... | 09/19/1989 |
| 4855965 | Time ramped gain for borehole televiewer Amplifier gain is time ramped to increase amplification of the signal with increasing mud transit time and attenuation. Amplitude, ramp slope, and ramp onset time are independently controllable from the surface.... | 08/08/1989 |
| 4855820 | Down hole video tool apparatus and method for visual well bore recording An apparatus and method of visually examining the sidewalls of a bore hole include a down hole video tool lowered into the bore hole by means of a cable and winch on the surface. The apparatus includes a wide angle video camera at its lower section. An up... | 08/08/1989 |
| 4852069 | Thin bed evaluation device The microstructure of thinly laminated earth formations is acoustically determined with a logging tool having an acoustical transducer pad mounted for measuring while in contact with the borehole wall.... | 07/25/1989 |
