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8994549 System and method of facilitating oilfield operations utilizing auditory information  
The invention provides a system and method for facilitating oilfield operations utilizing auditory data. In one embodiment, the present invention generates one or more auditory mapping structures...
8984945 System and device for acoustic measuring in a medium  
A device for acoustic measuring in a medium in a borehole such as velocity of sound in the medium or velocity of the medium, includes at least a first acoustic array situated in a first, slanted...
8848485 Sonic/acoustic monitoring using optical distributed acoustic sensing  
Methods and apparatus for performing sonic well logging within a wellbore based on optical Distributed Acoustic Sensing (DAS) are provided. A sonic well logging system based on DAS may be capable...
8654832 Apparatus and method for coding and modulation  
A communication method includes: receiving input data at a transmitter, the transmitter including at least one convolutional encoder and at least one modulator; applying the input data to a...
8619501 Ultrasonic measurements performed on rock cores  
One or more embodiments and methods of analyzing a formation sample with in a coring tool are disclosed herein. The methods and embodiments may include extracting a first core from a sidewall of a...
8614578 Attenuation of electromagnetic signals passing through conductive material  
The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to...
8277278 Acoustic imaging while cutting  
A method and apparatus for radially cutting tubulars in a downhole environment by emitting acoustic energy into the jet, the acoustic energy having a wavelength selected such that the jet acts as...
8194497 Reduction of tool eccentricity effects on acoustic measurements  
A system for measuring an acoustic property of material penetrated by a well borehole. The system uses a borehole logging tool comprising preferably one acoustic transmitter and preferably a...
8117014 Methods to estimate subsurface deviatoric stress characteristics from borehole sonic log anisotropy directions and image log failure directions  
Methods and apparatus for estimating stress characteristics of formations. The method comprises: (a) acquiring sonic anisotropy data, image data or both associated with at least one borehole (b)...
8116532 Extraction of processed borehole image elements to create a combined image  
A method for imaging a subsurface material, the method including: receiving a first image of the subsurface material and a second image of the subsurface material, the first image displaying a...
7954595 Lightweight inflatable borehole receiver unit for seismic testing  
A borehole receiver for seismic testing has a support frame and an inflatable membrane configured to form a single, compact unit. The inflatable membrane has at least one sensor, such as an...
7814036 Processing well logging data with neural network  
An artificial neural network, ANN, and method of training the ANN for inversion of logging tool signals into well logs of formation parameters is disclosed. Properly selected synthetic models of...
7813219 Electro-magnetic acoustic measurements combined with acoustic wave analysis  
A method and apparatus for assessing the permeability of a subterranean formation and the hydrocarbon and/or water content of the formation. The method includes emitting an acoustic signal, such...
7792766 Design of reconnaissance surveys using controlled source electromagnetic fields via probabilistic neural network  
Method for determining an expected value for a proposed reconnaissance electromagnetic (or any other type of geophysical) survey using a user-controlled source. The method requires only available...
7603238 Analysis of time-series data using singularities  
A method for acquiring and analyzing time-series data using singularities is described. This method allows for the analysis of data over a wide spectrum of frequencies. Once the data is acquired...
7580797 Subsurface layer and reservoir parameter measurements  
Method and system for determining a characteristic of a subsurface formation traversed by a wellbore. A fluid flow rate in the wellbore is established, the flow being associated with fluid...
7561997 Simulation system including a simulator and a case manager adapted for organizing data files for the simulator in a non-conventional tree like structure  
A simulation system includes a case manager adapted for organizing and managing a plurality of sets of input data being used by the simulation system. The case manager includes a plurality of case...
7463551 Method of generating directional low frequency acoustic signals and reflected signal detection enhancements for seismic while drilling applications  
The present invention provides a method and apparatus for using an acoustic logging tool conveyed in a borehole in an earth formation for determining a characteristic of the formation. The method...
7116182 Method and system for downhole clock having compensation  
A downhole crystal-based clock that is substantially insensitive to the factors that cause frequency deviation. The clock may be maintained at a predetermined temperature using a temperature...
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;...
7046165 Method for collecting geological data ahead of a drill bit  
A casing sensor and methods for sensing using a casing sensor are disclosed. The casing sensor includes a casing shoe and a sensor coupled to the casing shoe. A casing data relay includes a...
7042802 Determination of stress characteristics of earth formations  
A method for determining the maximum and minimum horizontal stresses of formations surrounding a borehole includes the following steps: suspending a logging device in the borehole; transmitting...
6976392 Atomic clock for downhole applications  
A system and method for acquiring seismic data are disclosed. The system comprises a controller for causing the generation of a seismic signal, where the controller has a first clock used for...
6973993 Methods and apparatus of suppressing tube waves within a bore hole and seismic surveying systems incorporating same  
Methods and apparatus for attenuating waves in a bore hole, and seismic surveying systems incorporating the same. In one embodiment, an attenuating device includes a soft compliant bladder coupled...
6965849 Method of designing geophysical surveys  
A method for the design of VSP surveys for the purpose of imaging a reef in the formations surrounding the well in question. The basic steps include: building a geophysical model;defining receiver...
6951262 Method and apparatus for suppressing waves in a borehole  
Methods and apparatus for suppression of wave energy within a fluid-filled borehole using a low pressure acoustic barrier. In one embodiment, a flexible diaphragm type device is configured as an...
6837332 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools  
An apparatus (10) and method are disclosed for eliminating a noise signal from at least one source during an acoustic measurement of a subsurface geological formation or borehole. The apparatus...
6782970 Acoustic source using a shaftless electrical hammer  
A shaftless acoustic source is disclosed having a solenoid, a bullet and driving electronics. The bullet, which is positioned inside the solenoid's coil, can be accelerated by a magnetic force...
6739423 Acoustic logging tool  
A sleeve for an acoustic logging tool has a structure with a window section having fewer bars than a conventional sleeve separated by a slotted region with thin circumferential slots which are...
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...
6614718 Device and method for seismic drill hole measuring  
Seismic waves are recorded twice by a reference sensor (8) above ground and by a sensor (18) located in the drill hole (1). Measurements are synchronized by a clock system, the clock associated...
6351991 Determining stress parameters of formations from multi-mode velocity data  
A method for determining unknown stress parameters in earth formation measures velocities in four sonic transmissions modes (compression, fast shear, slow shear and Stoneley) at a series of...
6002639 Sensor configuration for nulling reverberations to image behind reflective layers  
A transducer configuration disposed within a wellbore sonde for acoustically imaging a target region behind an acoustically reflective layer includes a transmitting transducer for producing a...
5996726 System and method for determining the distribution and orientation of natural fractures  
In oil and gas production, a process known as hydraulic fracturing is often used. Hydraulic fracturing involves pumping a fluid under pressure down a well bore into a fluid reservoir. When the...
5995447 System and method for processing acoustic signals to image behind reflective layers  
A system for acoustically imaging a target region behind an acoustically reflective layer includes a transducer configuration for acquiring acoustic image data from the reflective layer and target...
5963508 System and method for determining earth fracture propagation  
Hydraulic fracture extension in earth formation zones of interest may be monitored by placing one or more monitor wells in predetermined positions on opposite sides of an azimuth aligned with the...
5841734 Rotating acoustic transducer head for cement bond evaluation tool  
An apparatus for logging a borehole comprises a non-rotating component and a rotating component that is flexibly attached to the non-rotating component and includes a logging head. The rotating...
5834710 Acoustic pulse gun assembly  
A gas gun is provided for generation of an acoustic pulse and subsequent detection of return reflections from the annulus of a well. The system includes a gas gun and a hand-held gas source. The...
5619475 Method of predicting mechanical failure in formation utilizing stress derivatives which measure formation nonlinearity  
A method for determining whether a formation is subject to incipient failure are disclosed. The method comprises determining in situ a nonlinear parameter of a formation, and determining whether...
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...
5555220 Slickline conveyed wellbore seismic receiver  
The invention is a system for conducting a geophysical survey in a wellbore, comprising a battery-powered, self-contained borehole seismic receiver which internally digitizes and records an...
5544127 Borehole apparatus and methods for measuring formation velocities as a function of azimuth, and interpretation thereof  
Borehole tools are provided with at least one transmitter which generates acoustic waves at a plurality of azimuthal locations about the borehole, and at least one receiver which receives and...
5502686 Method and apparatus for imaging a borehole sidewall  
A method for concurrently gathering acoustic and resistivity data for mapping the texture of the sidewall of a borehole using a single imaging tool. The data are sampled, formatted and merged to...
RE34975 Ultrasonic measurement apparatus  
Pulse echo apparatus and methods are disclosed for measuring characteristics of a borehole while it is being drilled. A component of a bottomhole assembly, preferably a drilling collar, is...
5413174 Signal transmission through deflected well tubing  
Fluid production or injection wells may be used to transmit or receive seismic signals by lowering a signal transmitting device within a tubing string disposed in the well and exerting a pressure...
5377160 Transmitter and receiver to radially scan the cementing conditions in cased wells  
A sonic well logging tool radially measures circumferential cement conditions longitudinally along a well casing. Sonic signals are transmitted from a plurality of angularly displaced...
5318129 Method and device for setting up sondes against the wall of a cased well  
Sondes provided with magnets are used in wells fitted with a metallic casing. The sondes are pressed at the surface against the inner wall of the casing and taken down towards the bottom by means...
5275038 Downhole reeled tubing inspection system with fiberoptic cable  
A system for the inspection of a well borehole and the formation around the borehole. The system includes a pair of concentric reeled tubings for injecting a pair of fluids into a wellbore through...
5276656 Method for fluid identification and evaluation within wellbores using ultrasonic scanning  
The flow of bubbles in a borehole within an active well is determined by using data from a borehole televiewer. A known discontinuous material is introduced into the borehole at a known distance...
5229552 Method and apparatus for the downhole measurement of elastic rock properties  
A method and apparatus by which elastic properties of rock formations are determined includes a downhole logging device which has two internal accelerometers mounted within to measure the...

Matches 1 - 50 out of 116 1 2 3 >