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| Number | Title | Issue Date |
| 4691803 | Projectile powered piston A transportable seismic energy source having a baseplate for contacting the earth, an upper master cylinder affixed at its lower end to the base plate and extending uprightly from it, a receiving cylinder of outside diameter less than the internal diamete... | 09/08/1987 |
| 4656944 | Select fire well perforator system and method of operation A well perforator system and method employs an electromagnetic wave frequency receiver, one for each of at least two gun intervals, that receives a transmitted signal conveyed through well tubing from the earth's surface. The signal is converted to an ele... | 04/14/1987 |
| 4513402 | Earthquake simulator Earthquake simulator making it possible to produce seismic waves and apply them to a sample, wherein it comprises a generator able to produce shock waves, whose frequencies are similar to the shock wave frequencies produced in a natural earthquake, the ra... | 04/23/1985 |
| 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 |
| 4418786 | Bottom diaphragm for transporter for a seismic energy source An improved portable seismic energy source including a base member having cylindrical sidewalls and an open lower end for resting on the earth's surface, a horizontal baseplate secured to the base member upper end, the baseplate having a central opening t... | 12/06/1983 |
| 4359131 | Method of generating a seismic signal employing a water piston A method of generating a seismic signal by forming a shallow hole in the earth's surface, at least partially filling the hole with liquid, positioning a projectile firing apparatus over the hole and firing a projectile downward into the hole impacting the... | 11/16/1982 |
| 4354572 | Portable seismic energy source A portable seismic energy source having a base for resting on the earth's surface, a gun providing a means of firing a projectile to impact the earth and generate a seismic signal and a ball and socket to mount the gun on the base to permit the projectile... | 10/19/1982 |
| 4334591 | Transporter for low energy seismic source An improved seismic energy source having a base with an opening therethrough and having a gun mounted on the base for firing a projectile to impact on the earth's surface and generate a seismic signal, the improvement including a spatter plate and a flexi... | 06/15/1982 |
| 4324310 | Seismic apparatus A high resolution seismic data acquisition system is made up of an electronically-fired shotgun source integrally connected to a detector-recording means displaced from the shotgun source.... | 04/13/1982 |
| 4313380 | Distributed charge for seismic prospecting A distributed charge for use in producing a very sharp impulse for seismic prospecting comprises a series of lump explosive charges placed preferably of the order of at least 20 feet apart in a fluid in a well, connected with novel timed fuses. These fuse... | 02/02/1982 |
| 4286520 | Linear explosive charge with constant detonation velocity and synchronous booster charges A linear explosive charge with constant detonation velocity, comprising a plurality of series-coupled explosive units or sticks. All sticks are identical and comprise a tubular member of selected length, with matched couplings. A helix of explosive cord i... | 09/01/1981 |
| 4284006 | Linear explosive charge with constant detonation velocity and synchronous booster charges A linear explosive charge with constant detonation velocity comprising, a plurality of separate similar sticks that can be axially coupled into a long linear substantially rigid assembly. Each of the sticks includes a helical winding of linear explosive c... | 08/18/1981 |
| 4278025 | Seismic explosive charge loader and anchor An improved seismic explosive charge loader and anchor for loading and anchoring explosives in cylindrical containers in bore holes is disclosed, which includes a snap in spring band shaped anchor which effectively anchors the loader in the well bore agai... | 07/14/1981 |
| 4270626 | Coupling means for horizontal vibrator The present invention relates to means for coupling the horizontally directed force of a seismic transducer into the earth with a downward going shear wave. The coupling means consists of a plurality of downwardly convergent wedge-shaped earth engaging cl... | 06/02/1981 |
| 4223759 | Low energy source for seismic operation A lightweight, mobile, low-energy seismic source comprises an industrial shotgun, having a solid projectile combined with a base structure to support the gun in a substantially vertical position, slightly above the surface of the earth. The muzzle velocit... | 09/23/1980 |
| 4219096 | Submergible marine seismic source A marine seismic source employs a cylindrical gas exploder adapted to be supported from a surface vessel in a submerged state adjacent a marine bottom. The force of expanding gases within the exploder applies a thrust along the exploder longitudinal axis ... | 08/26/1980 |
| 4217571 | Stutter seismic source An improved seismic prospecting system comprising the use of a closely spaced sequence of source initiations at essentially the same location to provide shorter objective-level wavelets than are obtainable with a single pulse. In a preferred form, three d... | 08/12/1980 |
| 4177732 | Explosive fuse-cord An explosive fusecord comprising a core of explosive material surrounded by at least two layers of wrapping material, two adjacent layers being bonded together by an intermediate layer of waterproof hot-melt adhesive material which is preferably a blend o... | 12/11/1979 |
| 4117780 | Linear ejection underwater charge launcher The underwater charge launcher linearly ejects a small, water-propelled explosive charge into the water from the open end of an ejection barrel trailed in the water behind a seismic exploration vessel. The charge is detonated, after a one to two-second de... | 10/03/1978 |
| 4102428 | No-flash seismic cord A seismic explorative system for wilderness areas is described having a nonincendiary high core load linear detonating cord as the seismic energy source. The cord rests on the earth's surface in essentially an uncovered condition and comprises an elongate... | 07/25/1978 |
| 4072208 | Method and apparatus for seismic prospecting A method of seismic prospecting areas having a hard snow covered surface which comprises clearing the snow from a surface strip, laying a line of detonating cord on the surface, covering the cord with a layer of snow, compressing the snow layer to form a ... | 02/07/1978 |
| 4059819 | Detector assembly for seismic marine survey A method and apparatus for seismic prospecting in a body of water which comprises trailing a gun adapted to initiate explosively-operated charges at a sufficient depth below the water's surface to allow the creation in the body of water of high-pressure w... | 11/22/1977 |
| 4059820 | Seismic wave generator and method of geophysical prospecting using the same A device for generating seismic waves in the earth employs an elongated open-ended barrel having its closed end adjustably supported on a base plate for inclinations with respect to the base from about 15° to 30° is also rotatable about an axis normal t... | 11/22/1977 |
| 4057780 | Method for describing fractures in subterranean earth formations The configuration and directional orientation of natural or induced fractures in subterranean earth formations are described by introducing a liquid explosive into the fracture, detonating the explosive, and then monitoring the resulting acoustic emission... | 11/08/1977 |
| 4056164 | Stabilized portable seismic signal transducer A seismic signal source apparatus is mounted on the bed of a vehicle by means of a support structure. The apparatus includes a base plate coupled to ground surface beneath the vehicle as well as a seismic signal transducer to inject sweep signals into the... | 11/01/1977 |
| 4034672 | Linear explosive An elongated tubular container filled with a liquid explosive charge is provided with a detonator at one or both ends thereof to provide a linear explosion along the length of the tubular container. The tube may be buried in the ground by a tube burying p... | 07/12/1977 |
| 4026382 | Repetitive detonation seismic surveying method and apparatus This invention describes an apparatus and method for generating seismic waves in the earth for seismic geophysical prospecting. It involves a slender pipe open at the lower end, which can be driven into the earth to a shallow depth. The upper end is close... | 05/31/1977 |
| 4016952 | Marine gas exploder A pair of movable pistons are separated within an enclosed, submerged cylinder by an expansible combustion chamber. Piston rods extend from these pistons through the opposite ends of the cylinder. A pair of dish-shaped, circular plates are carried on the ... | 04/12/1977 |
| 4015526 | Explosive charge An explosive charge for use under hydrostatic pressure comprising high explosive composition in a flexible plastics container closed at one end and having, at the mouth end, a shoulder and a neck defining the container opening, the opening being sealed by... | 04/05/1977 |
| 4007804 | Apparatus for removal of condensation from a marine gas exploder device Condensate accumulating in the combustion chamber of a marine gas exploder of the cylinder and piston type is collected by gravity flow in a sump formed in a cylinder side wall or in a face of the piston, depending upon whether the cylinder is oriented ho... | 02/15/1977 |
| 3995713 | High speed seismic gas exploder and method of operation A gas exploder for injecting seismic signals into the earth is provided with a high speed hydraulic catching apparatus which allows the exploder to rebound essentially unrestrained after it is fired at the surface and replaces it on the ground in one seco... | 12/07/1976 |
| 3976161 | Power auger seismic source Seismic waves are generated by detonating an explosive gas mixture in an earth cavity formed by driving a short earth auger to a desired depth, leaving most of the augered earth in the hole surrounding the auger shaft, and then pulling the auger and shaft... | 08/24/1976 |
| 3971319 | Thermally actuated percussion initiatable explosive cartridge assembly A percussion initiatable explosive assembly with means for thermal actuation of same, comprising an explosive cartridge shell with main explosive charge contained therein, and a percussion initiatable primer extending into the main charge in detonating re... | 07/27/1976 |
| 3968855 | Seismic marine gun assembly The underwater gun assembly of this invention has an acceleration barrel and a firing gun. Percussion-initiatable cartridges are carried to the acceleration barrel by a stream of water. Each cartridge has an outside diameter which is nearly equal to the i... | 07/13/1976 |
| 3952832 | Pulsed high pressure liquid propellant combustion powered seismic sources A liquid propellant is burned in the bulk mode and in pulses to produce high combustion pressures with large power outputs. The pulsed high pressure liquid propellant combustion is also used for producing sound waves for underwater seismic exploration. Th... | 04/27/1976 |
| 3948177 | Self-disarming explosive cartridges An explosive cartridge for underwater shooting which is self-disarming in the event of underwater misfire, which includes a closed shell with main explosive charge therein, and a conduit as a primer well, extending closed end first into the shell for supp... | 04/06/1976 |
| 3942606 | Method of land seismic exploration using flexible tubes This invention relates to a land seismic exploration method and apparatus employing a plurality of elongated tubes each having a flexible wall for containing a volume of liquid explosive therein. Each tube is adapted to be detachably connected to either a... | 03/09/1976 |
| 3939771 | Seismic explosive charge loader and anchor A seismic explosive charge loader and anchor is disclosed for loading and anchoring explosives in conventional containers, such as cylindrical packages and cans provided with projecting circumferential rims. The loader includes a first tubular member havi... | 02/24/1976 |
| 3939941 | Fuse cord A fuse-cord comprising an explosive core and outer layer of elastomeric material formed with external ribs. The invention also includes a method of seismic prospecting using a detonating cord of this construction.... | 02/24/1976 |
