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| Number | Title | Issue Date |
| 7520696 | Vehicle for installing a cable in a ground formation A vehicle (1) for installing a cable (2) in a ground formation, in particular in a seabed, comprising a frame (3), propulsion means (4, 6), a cutter assembly (8) for forming a trench and a guide (15) for placing the cable ( | 04/21/2009 |
| 7284615 | Method and system for installing and maintaining a pipeline while minimizing associated ground disturbance A pipeline installation and maintenance method and system is disclosed in which a number of interconnectible platform modules are assembled into drilling platforms from which a segmented pipeline route is flexibly installed. Using modified push/pull rigs to carry ou... | 10/23/2007 |
| 7204327 | Reverse circulation directional and horizontal drilling using concentric drill string Method and apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation using concentric drill string having an inner pipe and an outer pipe defining an annulus there between. A bottomhole assembly comprising a directional drilling means su... | 04/17/2007 |
| 7189028 | Underwater pipe-laying A pipe-laying vessel includes an upwardly extending tower (14) assembly defining a path down which the pipe passes as a pipeline (40) is being laid by the vessel, and a lower guide arrangement for guiding the pipeline after it has passed down the tower... | 03/13/2007 |
| 7047676 | Rotational and positionable arm-controlled underwater bottom artifact and sample suction recovery apparatus and interchangeable bottom coring apparatus A novel rotational and positionable robotic arm-controlled underwater bottom artifact and sample suction recovery apparatus and interchangeable bottom coring apparatus, wherein the interchange is effected underwater by rotation of a common deploying arm and remote-c... | 05/23/2006 |
| 7025534 | 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... | 04/11/2006 |
| 7025533 | Concentrated buoyancy subsea pipeline apparatus and method Various apparatuses and methods to traverse an undersea topographic feature (12) with a subsea pipeline (18) are disclosed. The apparatuses and methods of the present invention accomplish this task through the use of a concentrated buoyancy scheme (... | 04/11/2006 |
| 6966132 | Method and device for moving subsea rocks and sediments A method for moving subsea rocks and sediments which can be at significant depths, in connection with removal of protective rocks around installations where maintenance is to be conducted. Tubing with an ejector nozzle is arranged completely externally in relation t... | 11/22/2005 |
| 6953306 | Method of accurate trenchless installation of underground pipe A method for the trenchless installation of new underground pipe accurately on line and on grade by microtunneling to install a pilot tube, installing a drill string along the pilot pipe line using a directional drilling machine, installing a back reamer to the dril... | 10/11/2005 |
| 6837653 | Ploughs A marine plough includes twin, complementary steering mechanisms, one or more soil-engaging fins, which are able to be steered, and a tow rope attachment mechanism that enables adjustment of the position of the tow rope retention point relative to the plough. This a... | 01/04/2005 |
| 6220786 | Underwater burial apparatus Apparatus for locally disturbing an underwater bed to enable the burial of an elongate member (39) comprises a mounting (30,31), resilient means (88-93) such as brush filaments coupled to the mounting, and means (9) for moving the resilient means with res... | 04/24/2001 |
| 6116818 | Underwater plow apparatus and method An ocean plow device and accompanying method which incorporate a passive plow blade and a jetter tool working in conjunction with one another to lower drawbar and increase cable deployment speeds. In order to avoid cavitation due to sand dilation, in one ... | 09/12/2000 |
| 6061932 | Steerable underwater plow with movable body member A steerable plow configured for towing in a direction along a seabed comprises a body and a soil cutting member slidingly connected to the body. The soil cutting member defines a cutting vane for cutting a trench in the seabed. The body includes two skids... | 05/16/2000 |
| 6050009 | Steerable underwater plow A steerable plow configured for underwater towing along a sea bed. The plow includes a plow body and a soil cutting member attached to the body. The soil cutting member is configured for forming a trench in the sea bed in a forward direction of travel of ... | 04/18/2000 |
| 6022173 | Underwater trenching system A self-guided system for trenching water bottoms for the installation of a pipeline. The preferred embodiment of the present invention teaches a system which is configured to be mounted about the pipeline to be buried, and which further contemplates a uni... | 02/08/2000 |
| 5639185 | Underwater trenching system A self-guided system for trenching water bottoms for the installation of a pipeline. The preferred embodiment of the present invention teaches a system which is configured to be mounted about the pipeline to be buried, and which further contemplates a uni... | 06/17/1997 |
| 5632574 | Backfilling device and apparatus therefor A ditch backfilling device and apparatus therefor are disclosed. In particular, the ditch backfilling device includes a mainframe for supporting a compartment for storing the backfill material and a screening system for sorting and directing the backfill ... | 05/27/1997 |
| 5601383 | Excavation method and apparatus for accessing underground pipes of pipelines for gas, oil, and the like for maintenance and/or restoration A method consisting in forming a preliminary excavation along the pipe and in then digging, starting from the bottom of the preliminary excavation, two lateral trenches that are adjacent to the sides of the pipe, converge downwardly, and go deeper than th... | 02/11/1997 |
| 5456551 | Underwater trenching system A self-guided system for trenching water bottoms for the installation of a pipeline. The preferred embodiment of the present invention teaches a system which is configured to be mounted about the pipeline to be buried, and which further contemplates a uni... | 10/10/1995 |
| 4806049 | Process and device for temporarily supporting the walls of a trench In a trench is disposed a closed flexible envelope filled with a fluid having a density or pressure greater than that of the surrounding fluid, movable by itself under the effect of the pressure exerted at its end by said pipe, which envelope is in the fo... | 02/21/1989 |
| 4802793 | Pipeline or cable plough The plough consists of two portions separable by rams (72). Each portion comprises a beam (14, 16) joined to a plough body part (18, 20). The portions include two pairs of longitudinally-spaced arms (69) interconnected by pivots (70). At each end of the p... | 02/07/1989 |
| 4749308 | Self-propelled underwater cable burying machine A self-propelled underwater bed cable burying machine is disclosed, which comprises a bottom running gear body with a high pressure water generator mounted therein and an arm-shaped water jet trenching unit mounted the base end capable of revolution in a ... | 06/07/1988 |
| 4714378 | Apparatus and method for trenching subsea pipelines Apparatus and a method for progressively forming a subsea trench and for laying a pipeline in that trench are provided. The apparatus includes a towable sled for supporting the pipeline as it is being laid in a subsea trench that is being created by fluid... | 12/22/1987 |
| 4643613 | Underwater trenching and pipe-laying devices For burying piping (1) in a sea-bed, at least one excavating machine (3) is provided for forming a first trench (4) parallel to the front portion (11) of the piping and to a guide formwork (5) adapted both for moving parallel to the first trenc... | 02/17/1987 |
| 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 |
| 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 |
| 4470720 | Underwater trenching & pipelaying apparatus The apparatus will include a support sled portion having a pair of spaced apart elongated pontoon sections. The pontoons are interconnected by a plurality of I-beam spacer members. A cutter apparatus, including an endless cutter chain projecting into the ... | 09/11/1984 |
| 4428132 | Trenching plow with plow carriage on curved supporting track A trenching device for previously laid cable or pipeline, particularly those laid under water, has a plough (1), means (8) for following the cable or pipeline, a carriage (9), which may be a tractor, connected to the plough through a towing member (6), an... | 01/31/1984 |
| 4395158 | Method and apparatus for entrenching an enlongated under-water structure A method and apparatus for entrenching under-water pipelines, in which auger assemblies are provided on a vehicle for inward tilting movement so that the auger assemblies both cut and convey bottom soil from the region beneath the pipeline. The respective... | 07/26/1983 |
| 4389139 | Oscillating jet head underwater trenching apparatus 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 ... | 06/21/1983 |
| 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 |
| 4362436 | Method and device for embedding cables or the like into an underwater ground A cable or the like is embedded into an underwater ground by introducing the cable into a zone of reduced density which is produced progressively in the ground by a flushing process; upon meeting with ground formations which are only insufficiently loosen... | 12/07/1982 |
| 4338042 | Apparatus for the subaqueous entrenching of pipes The invention relates to an apparatus for the entrenching of pipes in underwater beds, of the type in which a framework, provided with excavating means, is positioned across the pipe to be entrenched and dragged along the pipe so as to excavate two parall... | 07/06/1982 |
| 4329793 | Soil moving device A trenching implement (41) suitable for towing on the sea bed to make a trench for a submarine cable or pipeline (54) comprises a body (44) attached to which is a soil cutting member (46) which makes a soil surface in the direction of travel of the implem... | 05/18/1982 |
| 4314414 | Trench digging apparatus and bearing therefor A trench digging apparatus comprising a cutter wheel with picks projecting from the outer periphery thereof. An electric drive motor is provided to rotate the cutter wheel about a substantially horizontal axis. The cutter wheel is supported by a support f... | 02/09/1982 |
| 4274757 | Immersion/suspension method for the submarine deployment of high voltage transmission cable A method, as well as applied apparatus facilitating the free-floating, controlled suspension deployment of all semi-flexible and non-buoyant high voltage submarine electrical power transmission conduit/cable; including shore to shore interconnection insta... | 06/23/1981 |
| 4245927 | Laying of pipes or cables in a bed of material A method of and apparatus for laying a pipe or cable in a bed of material. There is provided an elongated generally straight tube having a plurality of cutter means mounted in generally parallel spaced relationship with one another along the outer surface... | 01/20/1981 |
| 4141667 | Underwater pipeline laying method and apparatus A method and apparatus for laying pipeline in a bed substantially under water. Pipe is placed on the bed along the general line the pipeline will take. A trench is excavated in the bed generally parallel to the pipe by transporting spoil to the opposite s... | 02/27/1979 |
| 4087981 | Buoyant self-propelled underwater trenching apparatus An underwater self-propelled buoyant trenching apparatus for burying a pipeline or cable on the bottom of a body of water. Water jets on a frame cut the trench, and a venturi operated eductor means sucks up and discharges the cuttings. The apparatus is mo... | 05/09/1978 |
| 4043136 | System and method for installing production casings A system and method for emplacing a relatively large casing under and spanning an obstacle such as a river is disclosed. The casing is emplaced along the path of a previously bored and placed existing pilot string running beneath the obstacle. The pilot s... | 08/23/1977 |
