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| Number | Title | Issue Date |
| 7281415 | Non-intrusive multiphase flow meter Embodiments of the present invention generally provide methods, apparatus, and systems for determining void fractions of individual phase components of a multiphase mixture. The void fractions may be determined based on measured parameters of the mixture as a whole,... | 10/16/2007 |
| 7270214 | Method and apparatus for reducing and extracting wing-tip vortex energy The present invention provides an apparatus and a method for reducing wing-tip vortex energy during seismic exploration. The apparatus includes a vortex concentrator of deployed proximate a tip of a hydrofoil and a vortex reducing device deployed proximate the vorte... | 09/18/2007 |
| 7240768 | Flapper finger valve A flapper finger valve assembly for use in an exhaust system. The flapper finger valve includes a tube having a plurality of orifices therethrough. The flapper finger valve assembly also includes a plurality of flapper finger valves generally having a C-shape wherei... | 07/10/2007 |
| 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 short, sharp, clear, loud bang sound down a borehole, normally between th... | 06/12/2007 |
| 7028807 | Non-explosive acoustic source A non-explosive acoustic source utilizes the combustion of aluminum and water to generate an acoustic pulse. The operation of the non-explosive acoustic source relies on a water/aluminum reaction to generate a burst pressure. The source may be deployed as a single c... | 04/18/2006 |
| 6956204 | Determining fluid properties from fluid analyzer A method for determining properties of a formation fluid including obtaining data related to an optical density at a methane peak and an optical density at an oil peak for a fluid sample at a plurality of times, calculating an apparent gas-oil-ratio of the sample fl... | 10/18/2005 |
| 6945095 | Non-intrusive multiphase flow meter Embodiments of the present invention generally provide methods, apparatus, and systems for determining void fractions of individual phase components of a multiphase mixture. The void fractions may be determined based on measured parameters of the mixture as a whole,... | 09/20/2005 |
| 6578405 | Gas seep detection A method of detecting a marine gas seep that includes: deploying a local probe on or near the seafloor; producing bubbles in water near or within the local probe; detecting the bubbles; producing data indicating the relative concentration of dissolved gas... | 06/17/2003 |
| 6571906 | Underwater sound mitigation system for explosive testing A sound mitigation system and method reduce the transmission of acoustic output from explosions underwater. The system is submerged to bottom terrain of a body of water and has at a series of gas-generating devices providing volumes of gas that are fed to... | 06/03/2003 |
| 6286612 | Shutoff valve for marine acoustic generator A valving system is disclosed which generally comprises a body including an inlet and an outlet where the inlet is disposed in fluid communication with a fluid flow passage and the outlet is disposed in fluid communication with a pressurized fluid member,... | 09/11/2001 |
| 6089345 | Elastic wave exploration tool for wells A well tool in accordance with the invention comprises an attenuation device which attenuates tube waves associated with an elastic wave emission and/or reception set (1, 12). The attenuation device comprises a bubble generator (2) which releases into the... | 07/18/2000 |
| 6091668 | Static marine seismic system and method A system and method for periodically providing information about subsurface formations in a marine environment using a non-towed seismic signal source (3) and a static array of seismic signal receivers (4) is disclosed. The seismic signal source (3) compr... | 07/18/2000 |
| 5646910 | Pneumatic gun for rapid repetitive firing A pneumatic gun or air gun having a fast-acting sliding valve reciprocable between two axial positions to close or open intake and exhaust ports in a charge chamber in a housing. The sliding valve comprises a piston internal to the housing and may include... | 07/08/1997 |
| 5646909 | Pneumatic gun for rapid repetitive acoustic firing A pneumatic gun having a fast-acting sliding sleeve valve member reciprocating between two axial positions, first to open an exhaust port for the explosive release of gas from a pressurized charge chamber in a stationary housing while simultaneously closi... | 07/08/1997 |
| 5592439 | Self-centering dual shuttle air gun An air gun for releasing compressed air into the environment. Two opposing shuttle valves selectively open ports to release compressed air more quickly from the air gun. A centering mechanism returns the first and second shuttle valves to the initial posi... | 01/07/1997 |
| 5592440 | Compact sleeve air gun A sleeve air gun for releasing compressed air into water. The air gun housing has a chamber enclosed with an end cap. The end cap is engaged with the air gun housing with a retainer that is light weight and expedites the engagement and disengagement of th... | 01/07/1997 |
| 5572486 | Seismic airgun arrangement Seismic airgun arrangement for attenuating unwanted oscillations in the emitted signal. The airgun has one or more outlet ports (9) for exhausting air in a generally radial direction from a central axis of the airgun (10), and a perforated screen (20) of ... | 11/05/1996 |
| 5469404 | Method and apparatus for seismic exploration A marine seismic signal source apparatus and method that maximizes the usable acoustical (db) energy of the array signature in a lower frequency bandwidth. The apparatus forms a three dimensional 2×4×2 array having a plurality of 8 air guns of identical... | 11/21/1995 |
| 5458123 | System for monitoring patient location and data A patient monitoring system utilizes a transmitter associated with each patient. The transmitter is worn by a patient and includes sensors operative to monitor vital signs of the patient. The transmitter transmits an allocated RF frequency which is partic... | 10/17/1995 |
| 5420829 | Method and apparatus for modifying the recoil of a marine acoustic generator The present invention is directed to a method and apparatus for substantially suppressing the undesired recoil derivative from the explosive discharge of high pressure gas from an airgun while still providing for useful optimized pressure pulses.... | 05/30/1995 |
| 5246595 | Process for degassing a coupling liquid of a pressure wave generator apparatus employing coupling liquid by chemical route, coupling liquid thus treated and shock wave generator using such a coupling liquid A process for degassing a coupling liquid is disclosed, comprising adding to said coupling liquid at least one chemical substance readily taking up gas in a sufficient quantity to absorb said gas substantially completely. This chemical substance is prefer... | 09/21/1993 |
| 4976333 | Method for reshaping acoustical pressure pulses The present invention is directed to a method of modifying or reshaping the acoustical signature created by the explosive, underwater release of a highly pressurized gas. More specifically, the present invention is directed at a method for modifying the a... | 12/11/1990 |
| 4956822 | Method and apparatus for seismic exploration A towable marine seismic source apparatus for producing a high resolution seismic signal at relatively shallow depths for engineering surveys is disclosed. The apparatus support frame operably mounts a plurality of eight identical chambered air guns in a ... | 09/11/1990 |
| 4949315 | External bubble-suppression method and apparatus The novel method substantially reduces the pressure pulse, generated by a first radial motion of a body of water, by changing the radial motion into axial motion. The change from radial motion into axial motion is produced by generating a second radial mo... | 08/14/1990 |
| 4921068 | Internal bubble-suppression method and apparatus The present invention comprises an apparatus and method for producing a high resolution acoustic signal from a single point source while achieving a commercially acceptable secondary bubble suppression. More specifically, the present invention comprises f... | 05/01/1990 |
| 4875545 | External bubble-suppression method and apparatus The novel method substantially reduces the pressure pulse, generated by a first radial motion of a body of water, by changing the radial motion into axial action. The change from radial motion into axial motion is produced by generating a second radial mo... | 10/24/1989 |
| 4753316 | Seismic source A water gun seismic source for use in underwater environments has a sleeve valve (100) for opening a jet aperture (37, 101) to enable jets of pressurized water to be emitted for the generation of a seismic signal. The water is pressurized by a drive pisto... | 06/28/1988 |
| 4739858 | Spectrally-shaped air gun arrays The invention is a method of shaping the spectrum of a seismic source signature. Energy is concentrated in the range below a selected frequency and attenuated in the range above the selected frequency by activating a plurality of sources asynchronously wi... | 04/26/1988 |
| 4735281 | Internal bubble-suppression method and apparatus The novel method substantially reduces the pressure pulse generated by an implosion of a cavity within a body of water by aborting the implosion. The abortion of the implosion is produced by generating within the cavity an explosion at the instant that th... | 04/05/1988 |
| 4727956 | Method and apparatus for signal improvement in marine seismic exploration A method of providing a marine seismic signal comprising the steps of: arranging a plurality of seismic sources into a seismic array having at least two seismic subarrays with each subarray having a plurality of seismic sources, towing the seismic array b... | 03/01/1988 |
| 4718045 | Underwater seismic energy source Disclosed is an underwater seismic energy source which includes a plurality of airguns. Each of the airguns has substantially the same size, weight and external configuration, but the internal capacities are configured such that when the guns are fired th... | 01/05/1988 |
| 4697255 | Implosion type energy source for seismic exploration An acoustic energy source or gun for use in an aqueous environment such as in a borehole, a well, or in open water. The apparatus, when lowered into a water occupied borehole or the like, functions to create a series of acoustic impulses without forming b... | 09/29/1987 |
| 4646871 | Gas-gun for acoustic well sounding In the art of acoustic well sounding a gas-gun for the sudden discharge of a measured quantity of compressed gas, comprised of two chambers, viz. a discharge chamber closed at one end by a poppet, and on the opposite end by a power-head, the latter a cyli... | 03/03/1987 |
| 4632214 | Seismic source for use underwater A seismic source drives one or more jets of high velocity water into an underwater environment and then terminates the jets by means of a valve member, the motion of which is controlled to obtain precisely timed high energy seismic pulses to provide refle... | 12/30/1986 |
| 4632213 | Seismic source system for use in water covered area Apparatus for forming a downwardly directed beam of acoustic wave energy in a body of water, comprising a source of acoustic wave energy such as a water gun, supported at a selected depth in the body of water. Means are provided above and around the sourc... | 12/30/1986 |
| 4618024 | Moving seismic source system for use in water-covered areas A moving seismic source system for the use in water-covered areas comprising a conventional source and streamer cable means with multiple receiver, and additionally includes between the source and receivers a volume of the body of water containing a small... | 10/21/1986 |
| 4382486 | Tuned air gun array The present invention provides a method for determining the spacing and size of air guns in a tuned air gun array. Volume ratios are calculated based upon a predetermined maximum volume for any individual air gun. The volumes are cross-referenced to spaci... | 05/10/1983 |
| 4327813 | Generation of seismic sources The invention relates to the creation of a shock wave within a mass of water by implosion of a vapor bubble. According to the invention, a controlled quantity of liquid water under pressure and which is super-heated relative to the mass of water is releas... | 05/04/1982 |
| 4303141 | Liquid slug projector apparatus The liquid slug projector apparatus (9) comprises a generator (10) having a main housing (13) whose main port (17b) fluidly communicates with a liquid body (12). A first shuttle (26) and a second shuttle (61a) are slidably mounted inside the main housing.... | 12/01/1981 |
| 4300654 | Undersea implosion device A method is described for causing hollow glass spheres to implode on command while deep in the ocean, whereby to produce an acoustic pulse. Specific means for causing the spheres to implode are described. The invention is useful for seismic work.... | 11/17/1981 |