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| Number | Title | Issue Date |
| 7701803 | Underwater acoustic positioning methods and systems based on modulated acoustic signals Methods and systems for moving seismic streamer steering devices to target positions are disclosed. One method comprises calculating forces required to steer one or more seismic streamer steering devices in a seismic spread to target positions, the calculated forces... | 04/20/2010 |
| 7590028 | Seabed seismic cables and methods of stabilizing same when deployed on a seabed Apparatus and methods for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, including controlling effect of water flow on the cable during data acquisition using fairing elements, which may be caused to extend from the ca... | 09/15/2009 |
| 7468932 | System for noise attenuation in marine seismic streamers A marine seismic streamer section has at least one strength member positioned in the streamer section, a solid material, which may be a soft compliant solid material, substantially filling the marine seismic streamer section around the strength member; and means for... | 12/23/2008 |
| 7423929 | Method for laterally steering streamer cables A device and a method for laterally steering a streamer cable towed underwater behind a seismic survey vessel. The device includes a cable-steering assembly rotatably attached to a streamer cable. The assembly includes a body to which one or more wings are mounted. ... | 09/09/2008 |
| 7403448 | Streamer steering device orientation determination apparatus and methods Apparatus and methods for enhancing knowledge of the angle of attack of a streamer steering device are described, one apparatus comprising a seismic streamer having an orientation member including a body and at least one control surface; a sensor of the body adapted... | 07/22/2008 |
| 7293520 | Control system for positioning of a marine seismic streamers A method of controlling a streamer positioning device (18) configured to be attached to a marine seismic streamer (12) and towed by seismic survey vessel (10) and having a wing and a wing motor for changing the orientation of the wing. The metho... | 11/13/2007 |
| 7260024 | Housing for a seismic sensing element and a seismic sensor A housing for a seismic sensing element (3) for use on the earth's surface comprises connecting means (5) for connecting the housing (3) to a support cable (2) so as to allow relative movement between the sensor housing (3) and the... | 08/21/2007 |
| 7222579 | Control system for positioning of marine seismic streamers A method of controlling a streamer positioning device (18) configured to be attached to a marine seismic streamer (12) and towed by seismic survey vessel (10) and having a wing and a wing motor for changing the orientation of the wing. The metho... | 05/29/2007 |
| 7167412 | Apparatus for steering a marine seismic streamer via controlled bending A marine seismic streamer steering device comprises at least two hinged sections pivotally coupled to each other and connected between two adjacent sections of the seismic streamer, and a bend control unit that controls bending of the hinged sections relative to the... | 01/23/2007 |
| 7156035 | Deflector devices A deflector for offsetting a streamer being towed by its lead-in by a seismic survey vessel comprises a wing-shaped body which is coupled to the lead-in and shaped to produce a sideways force which urges the lead-in laterally with respect to the direction of movemen... | 01/02/2007 |
| 7128014 | Watercraft compensation system A watercraft is disclosed that includes a hull, a deck supported by the hull, a propulsion system that is mounted to at least one of the hull and the deck, and a helm that is connected to the deck and configured to control the direction of the watercraft. A pole is ... | 10/31/2006 |
| 7092315 | Device for laterally steering streamer cables A device and a method for laterally steering a streamer cable towed underwater behind a seismic survey vessel. The device includes a cable-steering assembly rotatably attached to a streamer cable. The assembly includes a body to which one or more wings are mounted. ... | 08/15/2006 |
| 7080607 | Seismic data acquisiton equipment control system A method of controlling a streamer positioning device configured to be attached to a marine seismic streamer and towed by a seismic survey vessel and having a wing and a wing motor for changing the orientation of the wing. The method includes the steps of: obtaining... | 07/25/2006 |
| 7047898 | System for controlling streamers System for controlling cables and streamers in a seismic tow arrangement comprising at least one deflector (13) connected to one side of a tow vessel (10) via at least one wire (12), leading or the like, wherein the deflector is located in a pos... | 05/23/2006 |
| 6904860 | Winglet for the trailing end of towed flexible underwater lines A winglet for mounting on a trailing end of a flexible line to be towed by an underwater vehicle includes an internal collar member for connection to an inside surface of the line at the trailing end thereof, an outer collar member for connection to an outside surfa... | 06/14/2005 |
| 6879542 | Device for controlling navigation of a towed submarine object A device that allows control of the navigation of a towed underwater device, such as a linear acoustic antenna. The device is equipped with a pair of horizontal wings and a pair of vertical wings. These wings are kept horizontal and vertical by pendular movement of ... | 04/12/2005 |
| 6775204 | Automated cable handling and transport apparatus and vehicle There is provided an apparatus and vehicle for laying seismic line cable on the ground, retrieving the cable from near the ground surface, and transporting the cable. The vehicle carries at least one cable reel for unspooling the cable therefrom when laying cable an... | 08/10/2004 |
| 6532189 | Curved float for marine divertors An apparatus for providing buoyancy to a towed marine divertor and for reducing drag acting on the divertor as the equipment is towed through water. A float attached to the divertor has a curved leading end oriented toward the tow direction to reduce wate... | 03/11/2003 |
| 6525992 | Devices for controlling the position of an underwater cable A device for controlling the position of an underwater cable comprises a body, first and second actuators, and a pair of wings. The body is stationarily mountable to the underwater cable and the first and second actuators are disposed in the body. Each wi... | 02/25/2003 |
| 6504792 | Method and system for deploying and recovering seismic streamers in a marine seismic array A system and method for deploying and retrieving streamers behind a tow vessel in a marine seismic array. Each streamer and attached lead-in cable are individually deployed and retrieved into and from the array, and are connected to adjacent lead-in cable... | 01/07/2003 |
| 6483775 | Bird communications system in a marine seismic cable A communication housing for devices external to a solid marine seismic cable, especially for level control devices, comprises an upper housing half and a lower housing half, coupled together around the cable. The upper housing half includes a plurality of... | 11/19/2002 |
| 6459653 | Collapsible depth controller for mounting in relation to seismic cables or similar device Collapsible depth controller for mounting in relation to seismic cables or similar devices, comprising two wings, each being rotatably connected to a main body relative to a first axis of rotation perpendicular to the longitudinal direction of the depth c... | 10/01/2002 |
| 6456565 | System for undersea seismic prospecting A system for underwater seismic prospecting or exploration on seafloors, especially deep seafloors, including streamers designed to contain the measurement devices and to lie on the seafloor, in the form of an inner tube that is non-stretching and non-com... | 09/24/2002 |
| 6307809 | Geophone with optical fiber pressure sensor A pressure sensitive optical fiber is enclosed within a pressure chamber. A mass is positioned so as to vary the pressure in the pressure chamber in response to a seismic signal. Variations in the chamber pressure are directly detected by the pressure sen... | 10/23/2001 |
| 6226225 | Expandable marine diverter An expandible diverter for use in marine seismic operations. The diverter is stored in a retracted position for transport and handling, and is expandible to increase the amount of surface area in contact with the water. The diverter can be formed with two... | 05/01/2001 |
| 6173803 | High amplitude sound wave generator A method and device for generating a high amplitude sound wave is provided. The device includes a housing having an open end. A piston is slidably disposed in the open end of the housing and forms a chamber for holding a pressurized liquid. The pressurize... | 01/16/2001 |
| 6154420 | Seismic streamer trim section A system for selectively tuning the buoyancy of a marine seismic streamer or underwater cable. Trimming weights are positioned along the streamer cable and can be integrated within a solid buoyancy member or can be located within an outer streamer sheath.... | 11/28/2000 |
| 6031789 | Magnetic drive subassembly in a depth control device A magnetic drive device couples the drive motor of a depth control device or bird, with the axle of the depth control wings. The magnetic drive includes a plurality of permanent magnet pieces mounted in respective drive blocks on either side of a magnetic... | 02/29/2000 |
| 6016286 | Depth control device for an underwater cable A depth control device for an underwater cable includes a rotary actuator having a rotating output shaft connected to a swash plate. Rotation of the swash plate by the actuator causes a rocker arm to pivot about an axis transverse to the axis of the outpu... | 01/18/2000 |
| 6011752 | Seismic streamer position control module A seismic streamer position control module has been invented having a body with a first end and a second end and a bore therethrough from the first end to the second end for receiving a seismic streamer therethrough, at least one control surface, and at l... | 01/04/2000 |
| 5923616 | Communication coil housing for a solid marine seismic cable A solid marine seismic cable assembly includes communication coil housings which clamp around a cable in a spaced-apart relationship. The cable has a central axis. Each housing contains at least two communication coils adapted for communicating with an ad... | 07/13/1999 |
| 5841733 | Acoustic source array system for underwater operation An improved acoustic source array system is provided by the invention to generate acoustic signals underwater. The system has an array of acoustic signal sources, such as air guns, towable while underwater behind a surface vessel. The array includes a plu... | 11/24/1998 |
| 5747754 | Method and apparatus for taking seismic measurements Method and apparatus for carrying out seismic survey includes a plurality of spaced apart seismic detecting sensors each having a geophone unit for detecting seismic activities. The sensors are linked serially with a cable. One end of each geophone unit i... | 05/05/1998 |
| 5619474 | Depth control apparatus A depth control apparatus for seismic streamers, comprising a central unit adapted for inserted mounting in the streamer substantially in axial alignment with the streamer, a housing which can rotate about the central unit and carries at least one control... | 04/08/1997 |
| 5329071 | Method and device for operation of equipment installed in marine seismic tows A method and device for operating special equipment provided in seismic cables, i.e., gun cables and streamers (2, 3) during seismic surveys at sea, whereby energy is supplied through wires (4), or wireless transmitting/receiving devices, to the equipment... | 07/12/1994 |
| 5214612 | Swing plate latch mechanism For confidently coupling towed external devices to a marine seismic cable, a latch mechanism having a novel swing plate to improve the adjustability of the mechanism and provide a positive, clearly visible indication of latched and unlatched conditions. T... | 05/25/1993 |
| 4860264 | Arrangement for carrying out seismic prospection of the sea bed Air guns to be fired in water for carrying out seismic prospecting of the sea bed are suspended from a single rigid buoyant-body pararane so that the position of the air guns in the water is not unfavorably influenced by wave movements on the water surfac... | 08/22/1989 |
| 4748599 | Control device for cables with seismic equipment, especially for gun cables comprising one or several gun arrays A device for controlling a seismic cable that is towed behind a vessel (1), so that the cable follows a path that is displaced laterally in relation to the path of the vessel, comprises a frame structure (6, 7) extending transversely to the towing directi... | 05/31/1988 |
| 4733378 | Active low-profile hydrophone An active, low-profile hydrophone for use in aquatic environments having substantially turbulent flow conditions. The hydrophone is generally pisciform such that it may lie substantially flat on the water bottom and oriented in the current so as to reduce... | 03/22/1988 |
| 4719987 | Bi-planar pontoon paravane seismic source system A bi-planar pontoon paravane is towed by a marine vessel and controls the depth and position of a towed seismic source array. The bi-planar pontoon paravane is made up of a buoyant bridge with right and left wings attached to the long sides of the bridge,... | 01/19/1988 |
