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| Number | Title | Issue Date |
| 4868793 | Shared sub-array marine seismic source system Some of the laterally spaced air gun sub-arrays which are combined to form the sequentially fired source arrays of a marine prospecting system are shared between neighboring arrays. This double usage of said sub-arrays allows a larger number of full size ... | 09/19/1989 |
| 4856614 | Process and device for seismic prospecting of a medium with induced waves created artificially in a bore-hole The process consists in generating a primary tube wave, in using a reflecting element for the tube wave and in recording the times of emission of the induced waves radiated by the reflecting element, in receiving and recording at least part of the induced... | 08/15/1989 |
| 4800538 | Method of and systems for seismic exploration Described are methods of and systems for seismic exploration wherein a master station and a plurality of slave stations are utilized in conjunction with remotely located seismic sources. The system includes apparatus at the master station for generating a... | 01/24/1989 |
| 4737938 | Seismic prospecting method using vehicles moving in opposite directions A seismic prospecting method comprising the use of at least two vehicles for moving an acoustic wave emission assembly and a reception assembly such as a seismic streamer. The method consists in performing successive cycles of emission of acoustic waves, ... | 04/12/1988 |
| 4733747 | System and method for eliminating wave form distortion in multi-unit seismic source prospecting Individual seismic source units of a surface array activated simultaneously for cumulative reinforcement may initiate seismic waves at slightly different times despite efforts at synchronization. These variations are measured and used to compute an invers... | 03/29/1988 |
| 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 |
| 4723231 | Source tunable array for ground roll reduction A method of reducing Rayleigh waves (ground roll) in land seismic exploration employs a unique combination of amplitude output from and spacing of the vibrator sources making up a land seismic exploration system. The velocity of the Rayleigh wave for the ... | 02/02/1988 |
| 4721180 | Marine seismic source array The invention is a deployment system for a marine seismic source array. A plurality of sources are suspended at different depths from a float. The system is adapted for deploying the float and the sources into the water and retrieving them for reloading o... | 01/26/1988 |
| 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 |
| 4693336 | Underwater seismic testing A method of marine seismic investigation involves positioning or deploying at a predetermined point close to or within a multi-element seismic source array a calibration source which is an acoustic pressure wave point source which has a far-field seismic ... | 09/15/1987 |
| 4686660 | Assembly for use in seismic surveys of the sea bed An assembly for use in seismic surveys of the sea bed is towed behind a vessel and comprises groups of seismic signal transmitters which are towed through the water, being suspended from float buoys which are combined to form one body which may be formed ... | 08/11/1987 |
| 4683558 | Control system for inclined impact-type surface seismic source Multiple vehicle-transported impact-type surface seismic sources designed to shoot along slant paths to create combined compressional and shear wave pulses in the earth are provided with radio controlled actuators. The azimuth of each shooting path is aut... | 07/28/1987 |
| 4660184 | Device for use in borehole-seismic measurements at sea A device for use in borehole-seismic measurements at sea whereby seismic energy sources (7) are suspended below the surface (D) and connected to a handling line (2) which is operated by a crane arrangement on a vessel. By suspension of a minimum of two se... | 04/21/1987 |
| 4552086 | Float arrangement The present invention relates to a float which is provided with at least one hoist drum for a hoisting wire from a hoist. The float is provided with at least one suspension drum for a suspension wire to a suspension body. The hoisting drum and the suspens... | 11/12/1985 |
| 4497044 | Seismic wave generator A seismic wave generator and method of using it, which comprises a vertical array of sources at known spacings, for detonation in a seismic wave propagating medium of known seismic velocity; means to initiate the sources in time sequence in a selected ser... | 01/29/1985 |
| 4493061 | Stacked marine seismic source An arrangement of a plurality of individual gas expansible marine sources, wherein the positive portions of the primary shock waves are additive in effect, the negative portions of the primary shock waves are not additive in effect and the positive and ne... | 01/08/1985 |
| 4486864 | Method for marine seismic exploration A method for marine seismic exploration, comprising the steps of first discharging simultaneously a set number of seismic sources having a known volume V1, resulting in several seismic waves with substantially identical form which after reflect... | 12/04/1984 |
| 4326271 | Method and apparatus for determining acoustic properties in the earth A method and apparatus for determining the acoustic properties of the earth utilizes one or more identical, non-interacting, first spaced arrays of point sound sources and one or more identical, non-interacting, second spaced arrays of point sound sources... | 04/20/1982 |
| 4307790 | Weight-drop seismic exploration system A method of seismic exploration and a system which provides the capability for increasing the number of depth points from which seismic data are acquired are disclosed. This increase in data is realized without increasing the number of recording channels ... | 12/29/1981 |
| 4300653 | Seismic source array firing controller There is disclosed apparatus for controlling the precise time of firing of each air gun in an array of air guns employed in marine seismic exploration. For each air gun in the array, the apparatus maintains a record of past measured gun delays, that is th... | 11/17/1981 |
| 4296827 | Air-gun fire time sensor The resistive sensor consists of a pair of electrodes separated by an impervious insulating material. The sensor is mounted adjacent to an exhaust port of an airgun, in the path of the air blast that results when the gun is fired. When the air gun is subm... | 10/27/1981 |
| 4295542 | Seismic exploration with disposable seismic detectors Seismic sources and detectors are each positioned in a series of shotholes along a course to be explored. The sources in the shotholes are activated in a sequence along the course and caused to emit seismic waves. The detectors remaining along the course ... | 10/20/1981 |
| 4242742 | Process for eliminating longitudinal wave components in seismic exploration A seismic exploration process consisting of the application to the surface of the soil of a plurality of vertical impacts at points separated by a vertical trench cut into the soil. The vibrations propagating in the soil as a result of said impacts are th... | 12/30/1980 |
| 4242740 | Seismic refraction exploration In seismic exploration, refracted seismic energy is detected by seismic receivers to produce seismograms of subsurface formations. The seismograms are produced by directing seismic energy from an array of sources at an angle to be refracted by the subsurf... | 12/30/1980 |
| 4240518 | Method and apparatus for monitoring and controlling a multiplicity of air guns for seismic surveying Firing of a seismic source of the type called an air gun is detected by means of a fluid pressure sensor located in the housing of a solenoid actuated control valve. Through a pressurized gas support port the pressure sensor is in fluid contact with a shu... | 12/23/1980 |
| 4234938 | Determination of reflectivity and water depth for marine seismic exploration In marine seismic exploration, measurements of reflectivity and water depth are made from seismograms produced by the firing of a seismic energy source towed by a marine vessel. The measurements are made by generating the auto-correlation coefficients of ... | 11/18/1980 |
| 4234052 | Method and apparatus for generating seismic impulses using high pressure water pump as the energizing source A powerful seismic impulse is generated in a body of water by a slug of water propelled from a seismic source by expanding pressurized gas, but the gas is retained in the source for use in subsequent firings. The seismic energy source, which is called a "... | 11/18/1980 |
| 4170002 | Seismic system using a combination of generically different sources In seismic exploration, particularly at sea, several seismic acoustic sources selected from different genera of such sources are combined in a single array. The several sources are fired substantially simultaneously so that the acoustic pulses from the se... | 10/02/1979 |
| 4146871 | Determination of reflectivity and water depth for firing marine sources as an inverse distortion operator In marine seismic exploration, seismograms recording reflected energy generated from the firing of a seismic source are used to measure the characteristics of the medium through which the energy passes. These measurements are converted into control parame... | 03/27/1979 |
| 4136754 | Process for seismic exploration by means of a directive source The invention concerns a process for seismic exploration. It consists in simultaneously emitting disturbances from a plurality of sources S1 . . . Sn immersed at various depths and positions chosen so as to maximize the power transmitted vertically and to... | 01/30/1979 |
| 4134098 | Multiple reflection suppression in marine seismic exploration with long source and detector arrays In marine seismic exploration, a long array of sources efficiently transfers energy along the reflection path. Multiple reflection rejection is achieved by normal move-out discrimination at selected trace distances for each reflection. The length of the s... | 01/09/1979 |
| 4064479 | Vertically directive arrays for marine seismic exploration A system for marine seismic exploration has arrays of sources and receivers which discriminate against horizontal traveling source-generated noise. Directive arrays of sources or receivers have a length which is longer than the wavelength of the lowest fr... | 12/20/1977 |
| 4038630 | Airgun marine seismic survey streamer method and apparatus A method and apparatus for simultaneously towing and handling multiple airguns are disclosed for use in marine seismic surveying which provide for ease in handling large numbers of airguns and enable them to stream out at a desired depth behind a submerge... | 07/26/1977 |
| 4034827 | Air gun utilizing magnetized shuttle Disclosed is an improved air gun construction which lends itself to use with a plurality or array of similarly improved air guns which enables easy synchronization and timing of such array of air guns relative to one another. In the preferred embodiment, ... | 07/12/1977 |
| 3985199 | Apparatus for timing the firing of energy sources Apparatus for effecting and controlling the firing of energy sources, particularly is seismic work, includes means for automatically correcting the delays between the desired and actual firing times which may be different for different sources. These mean... | 10/12/1976 |
