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| Number | Title | Issue Date |
| 7246971 | Stabilisation of submarine elongate structures A stabilization system (10) for a section of submarine pipeline (11) comprising an end restraint (15) at each end of the section of pipeline and intermediate restraints (20) between the two end restraints (15) for limiting lateral ... | 07/24/2007 |
| 7066687 | Marine seismic surveying A method of performing a seismic survey of a hydrocarbon reservoir in the earth formations beneath a body of water includes deploying a seismic cable from a drum carried by a remotely operated vehicle on the seabed. The cable is deployed into a lined trench, which i... | 06/27/2006 |
| 6846133 | Marine seismic surveying A method of performing a seismic survey of earth formations beneath a body of water is disclosed. The method includes: (a) deploying a seismic cable having a plurality of seismic sensors distributed therealong in close proxmity to elongate locating means provided at... | 01/25/2005 |
| 6719494 | Cable and pipe burial apparatus and method An apparatus for burying cables and pipes in soil includes a support structure adapted for movement across a surface of the soil. A water jetting machine is provided for producing a source of pressurized water. At least two jetting arms are in fluid communication wi... | 04/13/2004 |
| 6705029 | Trenching machine An apparatus for forming a trench in a seabed for burying a line generally consisting of a main frame, at least one buoyancy tank mounted on the main frame, a pair of endless track assemblies, each engageable in gripping relation with a side of the line for propelli... | 03/16/2004 |
| 6672801 | Submarine apparatus having a spacer mechanism between a body and a boot A submarine apparatus is laid undersea by a submarine-cable laying device. The submarine apparatus comprises a cylindrical body performing a signal processing, a conical boot arranged at each of both ends of the body so as to fix an end of a submarine cab... | 01/06/2004 |
| 6616378 | Device and method for storing and protecting data relating to pipe installation A device (6) for attachment to a pipe (7) to be installed in the ground has load cells (17) for detecting a pulling force applied to the pipe (7), as the latter is pulled through the ground, an inclinometer (18), for detecting the inclination of the devic... | 09/09/2003 |
| 4896998 | Submarine cable plough A plough by means of which a cable may be buried below the sea-bed is characterized by means to vary the length of the path of a cable extending through the plough, which means is responsive to changes in tension in the cable. In one preferred form of the... | 01/30/1990 |
| 4586850 | Underwater trenching system An underwater trenching apparatus for burying pipeline and the like including a frame for positioning about the pipeline to be buried, a drive roller system operatively connected to the frame for driving the frame along the pipeline and including at least... | 05/06/1986 |
| 4542334 | Induced-signal capacitance effect cable tracking sensor Inductive coupling of a high-frequency signal into a cable to be detected d tracked in a seawater medium for sensing the relative position of the cable with respect to capacitor plates. The capacitor plates are positioned so that in conjunction with the c... | 09/17/1985 |
| 4540942 | Alternating current induction method using an annular magnetic coupling body for detecting the position of a buried submarine cable A device for burying a submarine cable under the water by easily and accurately detecting the cable position and a method for guiding the same by utilizing the characteristics unique to submarine cables, by supplying an AC only to the portion of the cable... | 09/10/1985 |
| 4537530 | Marine cable burying method and device therefor The present invention aims at providing a method and a device therefor which can effectively as well as accurately bury a cable under marine beds not only when a cable is newly laid and buried but also when a cable has to be reburied. The method and the d... | 08/27/1985 |
| 4516880 | Underwater trenching apparatus A trenching machine for digging a trench beneath a pipeline lying on the floor of a body of water, with a pair of laterally spaced vertical cutting members, shown to be a series of water jets, positioned at each end of the machine. The cutting members are... | 05/14/1985 |
| 4492492 | Guiding method for cable burying device and a device therefor The present invention aims at providing a method and a device for guiding the cable burying device along the cable effectively as well as accurately even if the cable should be reburied after repairment. The present invention is mainly characterized in th... | 01/08/1985 |
| 4384808 | Under-water cable burying device The present invention has an object to provide an underwater cable burying device which can accurately be guided to align with the cables in the process of burying even if the cables have to be re-buried. The device according to the present invention is c... | 05/24/1983 |
| 4330225 | System for entrenching submerged elongated structures A system for excavating a trench in the sea bottom and removing the excavated spoil from the trench in order to enable an elongated structure, such as a pipeline, to settle into the trench is disclosed along with a corresponding method of operating such s... | 05/18/1982 |
| 4283681 | System for detecting an underwater buried cable A cable detecting system with a cable ship, a cable detector towed by said cable ship via a towing wire and said cable detector dredging the water bottom to find a buried cable, has been improved. When the cable detector detects a buried cable, and the ca... | 08/11/1981 |
| 4280289 | Underwater trenching machine for burying pipeline and the like An underwater trenching machine comprising a carriage and a pair each of fore and aft pivotal frames, each of which carries a drive roller means for intimately contacting the pipeline, said front and rear frames being adapted to mutually exclusively pivot... | 07/28/1981 |
| 4274760 | Self-propelled underwater trenching apparatus and method This invention relates to the self-propelled underwater trenching apparatus and method for burying pipelines, cables and the like with minimum underwater diver supervision. The apparatus includes a frame having frame members positioned about the pipeline.... | 06/23/1981 |
| 4149326 | Machine for digging a trench beneath a submerged pipeline An apparatus for digging a trench beneath a pipeline laid on the bottom of sea or a water body, in which a clamp arrangement is split into a wider sector portion and a narrower sector portion which, as they are united under the control of a driving mechan... | 04/17/1979 |
| 4037422 | Articulated jet sled An apparatus for entrenching submerged elongate structures, such as a pipeline, within the bed of a body of water. A spreader frame straddles the pipeline to be entrenched. Port and starboard sled frame members having pontoons are pivoted in the spreader ... | 07/26/1977 |
| 4012918 | Submarine cable laying system A submarine cable laying system having an underwater cable laying device towed by a cable laying ship along the sea bottom is disclosed. The underwater cable laying device comprises a cable depressing wheel, a mechanism for elevating and lowering the cabl... | 03/22/1977 |
