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8913461 Televiewer image wood-grain reduction techniques  
Measurements made by a transducer assembly for downhole imaging are affected by reverberations between the transducer and the window on the outside of the assembly. The reverberations result in a...
8669881 Container data center with earthquake protection function  
A container data center includes a container, a plurality of power supplies, an electric switch system, a plurality of normally closed switches, an alarm device, and a controller. The electric...
8634272 Televiewer image wood-grain reduction techniques  
Measurements made by a transducer assembly for downhole imaging are affected by reverberations between the transducer and the window on the outside of the assembly. The reverberations result in a...
8511421 Acoustic sources  
An apparatus disclosed herein includes a shell movably coupled to a base. The shell defines a chamber, and a counterweight is disposed in the chamber. A first spring is coupled to the shell and a...
8400872 Seismic source which incorporates earth coupling as part of the transmitter resonance  
An acoustic energy source for imparting acoustic energy into the Earth's subsurface includes an electrically driven transducer coupled to a source of swept frequency alternating current. A tunable...
8353383 Water motion powered seismic energy source and method for seismic surveying therewith  
A seismic energy source includes an inlet aperture and an inlet pipe in fluid communication with an outlet of the inlet aperture at an inlet end of the inlet pipe. The inlet pipe is in fluid...
8307941 Seismic gun assembly for shooting into a bore hole  
A seismic gun system for surveying underground geological topology, the seismic gun system comprising a projectile, a seismic gun body, a barrel, and a guide tube. The projectile includes an outer...
8261873 Electromagnetic linear drive source for logging-while-drilling/wireline acoustic applications  
An apparatus and method for providing a downhole acoustic source is disclosed. The acoustic source includes a piston configured to oscillate in an axial direction of the acoustic source and...
8243550 Downhole communication method and system  
A system and method is provided for communicating with a device disposed in a wellbore. Signals are sent through the Earth via signal pulses. The pulses are created by a seismic vibrator and...
8220583 Acoustic isolator section  
An acoustic isolator section for an acoustic well logging tool, the isolator section comprising: an isolator comprising:(i) an isolator body;(ii) a mass;(iii) a resiliently deformable portion...
8104568 Seismic gun assembly for shooting into a bore hole  
A seismic gun assembly comprising a barrel and guide tube assembly for delivering a projectile to the bottom of a bore hole with a non-line-of-sight section. The guide tube being either a large...
7997380 Low frequency acoustic attenuator  
An attenuation apparatus, system, and method are disclosed. The attenuator is attached to a pipe and includes a housing that includes an inner sleeve and an outer sleeve. The attenuator includes...
7987943 Apparatus and method for generating a seismic source signal  
A seismic source signal generator includes a mass, a primary accumulator and a secondary accumulator, the secondary accumulator having an internal volume smaller than an internal volume of the...
7916578 Seismic wave generation systems and methods for cased wells  
A vibration source (10) includes an armature bar (12) having a major length dimension, and a driver (20A) positioned about the armature bar. The driver (20A) is movably coupled to the armature bar...
7823689 Closed-loop downhole resonant source  
An apparatus for generating seismic body waves in a hydrocarbon reservoir includes a closed-loop borehole source having a resonant cavity for generating resonant energy, a drive source and a...
RE41829 Nonlinear electroseismic exploration  
A method for seismic exploration using nonlinear conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the...
7789141 Oil recovery enhancement method  
The current invention provides an improved method of increasing well yield and enhancing oil production. The method comprises the steps of lowering a vibroacoustic downhole emitter into a well...
7660194 Microseismic fracture mapping using seismic source timing measurements for velocity calibration  
A system and method for microseismic fracture mapping using seismic source timing measurements for velocity calibration is disclosed. The system may include a seismic source coupled to a wireline...
7650963 Acoustic isolator for well logging system  
An acoustic isolator for attenuating through-tool acoustic signals comprises a plurality of u-shaped link members, where each link member has two sets of ears. A plurality of yoke members are...
7628248 Apparatus and method for generating a seismic source signal  
A seismic source signal generator includes a mass, a primary accumulator and a secondary accumulator, the secondary accumulator having an internal volume smaller than an internal volume of the...
7617908 Downhole seismic source  
Elastodynamic waves are generated by a tool having a hammer rotatably connected with a housing by a first hinge and an actuator arm rotatably connected with the hammer by a second hinge. An axial...
7578359 Downhole acoustic source  
An acoustic source for delivering acoustic energy to a ground formation, particularly a rock formation, the source including (a) a solenoid to generate an electromagnetic field, (b) a bullet...
7539279 Logarithmic spectrum transmitter waveform for controlled-source electromagnetic surveying  
Waveforms for controlled source electromagnetic surveying. The waveforms have frequency spectra that include three or more frequencies spaced at substantially equal intervals on a logarithmic...
7460435 Acoustic transducers for tubulars  
Acoustic transducers configured with transducer elements disposed on an arch or arcuate shaped member adapted to fit in juxtaposition around a tubular. The arcuate shaped member is adapted with...
7420879 Device for seismic emission in an underground formation and method for implementing same  
A device for seismic emission in an underground formation comprising one or more vibrators of any type and method for implementing same. According to a preferred embodiment, each vibrator...
RE40475 Source waveforms for electroseismic exploration  
A method for seismic exploration using conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the invention,...
7414918 Method for normalizing signals in a cement bond logging tool  
A longitudinally segmented acoustic transducer for a cement bond logging (CBL) tool having a plurality of adjoining PZT ring-like segments driven synchronously in parallel by one or more pulses...
7336562 Sonic logging tool including receiver and spacer structure  
A formation logging tool having a substantially continuous central mandrel with regularly spaced mass blocks disposed thereon, at least some of the mass blocks carrying sensors such as receivers....
7277358 Apparatus, method and system for digitally transmitting acoustic pulse gun signals  
The present invention is directed to overcoming analog transmission difficulties by digitizing transducer signals at or near the transducer of an acoustic pulse gun and then transmitting the...
7228934 Acoustic generator for distance sounding with a firing mechanism independent of the pressure equilibration force  
In the oil industry, the acoustic sounding method is a well-known technique for taking the depth measurements of particular attributes of an oil well or borehole. The method involves sending a...
7216737 Acoustic isolator between downhole transmitters and receivers  
Apparatus and methods for acoustically isolating logging tool receiver and transmitter sections. One or more modular isolators is arranged between the receiver and transmitter sections. The...
7216738 Acoustic stimulation method with axial driver actuating moment arms on tines  
A method for generating acoustic waves, the method having the steps of: extending a tine from a support structure so that a proximal end of the tine is attached to the support structure and a...
7213681 Acoustic stimulation tool with axial driver actuating moment arms on tines  
An apparatus for generating acoustic waves, the apparatus having: a support structure; two tines extending from the support structure so that proximal ends of the two tines are attached to the...
7182170 Gerotor and bearing system for whirling mass orbital vibrator  
A gerotor and bearing apparatus for a whirling mass orbital vibrator which generates vibration in a borehole. The apparatus includes a gerotor with an inner gear rotated by a shaft having one less...
7178626 Method of seismic evaluation of subterranean strata  
A method of conducting seismic evaluation of a subterranean formation wherein a rigid, elongate member having a first end and a second end is positioned such that the first end of the elongate...
7104357 Device for generating focused elastic waves in a material medium such as underground, and method using same  
An electromechanical device for generating elastic waves in a material medium such as the subsoil in a frequency range where the wavelengths of the waves generated are great in view of the...
7102961 Installation of seismic survey devices in shallow, low-angle boreholes  
The specification discloses a system and related method for installing seismic sensors in shallow, low-angle boreholes for obtaining conventional three-dimensional and four-dimensional seismic...
6985815 Instantaneous spectral analysis  
A method of seismic data processing is described in which a particular wavelet is selected from a plurality of wavelets as being most characteristic of a received seismic signal. A subtracted...
6985086 Method and apparatus for LWD shear velocity measurement  
The logging tool of this invention includes a transmitter conveyed on a drilling collar for exciting a quadrupole signal in a borehole being drilled by a drill bit and a receiver for receiving the...
6909666 Method and apparatus for generating acoustic signals for LWD shear velocity measurement  
An acoustic logging apparatus comprises a drill collar conveyed on a drilling tubular in a borehole within a formation. At least one transmitter is disposed in the drill collar. The transmitter...
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...
6834743 Wideband isolator for acoustic tools  
The acoustic isolator assembly of the present invention comprises a elongated cylindrical body suited for connection to an acoustic array and subsequent disposition within a wellbore. According to...
6795373 Permanent downhole resonant source  
A wellbore system and method for producing seismic waves in an earth formation. The system comprises a cavity containing fluid. The cavity is in a space between a wellbore tubular, which may be...
6747914 Use of minor borehole obstructions as seismic sources  
An acoustic system and method for monitoring a hydrocarbon reservoir. Wellbore tube wave energy may be created by natural or ambient sources or tube waves may be excited intentionally. Wellbore...
6705425 Regenerative combustion device  
A regenerative combustion device having a combustion zone, and chemicals contained within the combustion zone, such as water, having a first equilibrium state, and a second combustible state....
6671224 Active reduction of tool borne noise in a sonic logging tool  
A sonic logging tool that can be positioned within a fluid-filled borehole includes an axially distributed active vibration control system to reduce tool borne noise. The tool includes an acoustic...
6664788 Nonlinear electroseismic exploration  
A method for seismic exploration using nonlinear conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the...
6661737 Acoustic logging tool having programmable source waveforms  
An acoustic tool that provides a programmable source waveform is disclosed. Numerous advantages may be achieved from the configurability of the source waveform. Notably, acoustic logs at multiple...
6619423 Measuring device for measuring the elastic properties of a surface structure  
A measuring device for measuring the elastic properties of a surface structure (3), comprising a probe (2) arranged within a housing (1), a transmitter and at least one receiver, the transmitter...
6595285 Method and device for emitting radial seismic waves in a material medium by electromagnetic induction  
A method and device for emitting radial seismic waves in a material medium by electromagnetic induction, used notably for generating seismic waves in cased or uncased wells or in a water mass is...

Matches 1 - 50 out of 261 1 2 3 4 5 6 >