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Class Information
Number: 405/163
Name: Hydraulic and earth engineering > Subterranean or submarine pipe or cable laying, retrieving, manipulating, or treating > Submerging, raising, or manipulating line of pipe or cable in or from marine environment > Entrenched or buried > Entrenching or burying apparatus guided by pre-positioned pipe or cable > With bottom fluidizing means
Description: Method or apparatus wherein an initially relatively firm bottom material supporting the pre-positioned string or conduit is caused to assume a flowable state, thereby permitting the string or conduit to settle into a position beneath the bottom.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8083437 Underwater trenching apparatus Dec. 27, 2011
7637696 Underwater trenching apparatus Dec. 29, 2009
7468884 Riser retention system Dec. 23, 2008
7048470 Guide device in an offshore drilling installation May. 23, 2006
6904856 Method and apparatus for accessing underwater cable or pipes Jun. 14, 2005
6821054 Method and system for laying pipe through the use of a plow Nov. 23, 2004
6719494 Cable and pipe burial apparatus and method Apr. 13, 2004
6705029 Trenching machine Mar. 16, 2004
6588980 Underwater cable deployment system and method Jul. 8, 2003
6273642 Buoyant propulsion underwater trenching apparatus Aug. 14, 2001
6116818 Underwater plow apparatus and method Sep. 12, 2000
6095721 Method and device for burying a conduit under water Aug. 1, 2000
6053663 Device for creating a local water flow Apr. 25, 2000
6022173 Underwater trenching system Feb. 8, 2000
5944447 Underwater pipeline entrenching apparatus and method of using the same Aug. 31, 1999
5659983 Device for filling in a trench dug in the sea bed in order to cover a pipe laid down in the trench Aug. 26, 1997
5639185 Underwater trenching system Jun. 17, 1997
5626438 System for excavating and rehabilitating underground pipelines May. 6, 1997
5546682 Sediment relocation machine Aug. 20, 1996
5456551 Underwater trenching system Oct. 10, 1995
5288172 Water jet system for trenching of pipelines Feb. 22, 1994
5238331 Modularized machine for reconditioning pipelines Aug. 24, 1993
5155928 Method and tool for performing seabed excavation Oct. 20, 1992
5136969 Modularized machine for reconditioning pipelines Aug. 11, 1992
5088857 Scavenging apparatus for embedding cables or the like into the soil of waters Feb. 18, 1992
5080530 Laying underwater cables Jan. 14, 1992
4995168 Technique for locating submerged and buried pipelines Feb. 26, 1991
4992000 Underwater trenching system Feb. 12, 1991
4986697 Marine pipeline trenching plow for simultaneous pipe laying and entrenchment Jan. 22, 1991
4812079 Embedding cablelike members Mar. 14, 1989
4787777 Method and device for progressively producing an underwater laying-out channel Nov. 29, 1988
4749308 Self-propelled underwater cable burying machine Jun. 7, 1988
4721409 Method and device for progressively producing an underwater laying-out channel Jan. 26, 1988
4714378 Apparatus and method for trenching subsea pipelines Dec. 22, 1987
4714379 Pipelay in slurry trench Dec. 22, 1987
4586850 Underwater trenching system May. 6, 1986
4575280 Underwater trencher with pipelaying guide Mar. 11, 1986
4516880 Underwater trenching apparatus May. 14, 1985
4479741 Device for laying underground or digging up subsea conduits Oct. 30, 1984
4389139 Oscillating jet head underwater trenching apparatus Jun. 21, 1983
4342526 Submersible backfill machine Aug. 3, 1982
4330225 System for entrenching submerged elongated structures May. 18, 1982
4301606 Apparatus for excavating a trench underneath a pipeline installed on the sea bottom Nov. 24, 1981
4295757 Jet sled spoil scoop apparatus Oct. 20, 1981
4280289 Underwater trenching machine for burying pipeline and the like Jul. 28, 1981
4274760 Self-propelled underwater trenching apparatus and method Jun. 23, 1981
4245927 Laying of pipes or cables in a bed of material Jan. 20, 1981
4190382 Separable trenching apparatus Feb. 26, 1980
4154551 Flow-through swivel pipe joint May. 15, 1979
4117689 Submarine pipe trenching apparatus Oct. 3, 1978

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