| Patents for F16L 1 - Laying or reclaiming pipes; Repairing or joining pipes on or under water (7,464) |
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| 04/28/1981 | US4264234 Directional orientation apparatus for surface end of submerged oil line |
| 04/28/1981 | CA1099958A1 Hot tap machine |
| 04/22/1981 | EP0027150A1 Apparatus for forming and installing underground drainpipe |
| 04/21/1981 | US4263004 Device for transferring a fluid through a liquid body by means of a flexible pipe |
| 04/14/1981 | US4261671 Corrugated pipe for deepwater applications |
| 04/08/1981 | EP0026758A1 Device with several floating elements |
| 04/07/1981 | US4260290 Cable plow assembly |
| 04/07/1981 | US4260288 Pipe laying apparatus and method |
| 04/07/1981 | US4260287 Portable reel pipelaying method |
| 03/31/1981 | US4258794 Underwater completion habitat |
| 03/24/1981 | US4257719 Underwater pipelines |
| 03/24/1981 | US4257718 Semi-submersible pipelaying craft equipped for laying pipes on sea beds, including deep beds, and the method of operation |
| 03/24/1981 | CA1098146A1 Pipe coupling |
| 03/10/1981 | US4254930 Drain pipe hanger |
| 03/10/1981 | US4254728 Device for mooring and connecting a submarine conduit, and method employing the said device |
| 03/03/1981 | US4253779 Method for aligning two submerged pipe sections |
| 02/24/1981 | US4252466 Adjustable apparatus for supporting a pipe, laid on a deep sea bed, at a depression in the sea bed |
| 02/24/1981 | US4252465 Pipeline gel plug |
| 02/19/1981 | WO1981000441A1 Method of laying offshore pipeline from a reel carrying vessel |
| 02/17/1981 | US4251167 Method of welding together submerged pipe ends by means of a telescopic connection sleeve |
| 01/20/1981 | US4245927 Laying of pipes or cables in a bed of material |
| 01/13/1981 | CA1093323A1 Method and means for protecting a sea bottom surface and an installation on same |
| 01/07/1981 | EP0020655A1 Line length navigation system |
| 01/07/1981 | EP0020322A1 A system for protection of an installation on the floor of a body of water |
| 01/07/1981 | EP0020321A1 A system for depositing sediment and/or protecting an installation on the floor of a body of water |
| 01/06/1981 | US4243345 Pipe handling apparatus for reel pipe laying system |
| 12/30/1980 | US4242010 Method and means for protecting a sea bottom surface and an installation on same |
| 12/30/1980 | CA1092375A1 Apparatus for recovering, by means of a pipelaying craft, pipes laid on deep sea beds |
| 12/30/1980 | CA1092374A1 Underwater pipelines |
| 12/10/1980 | EP0020257A1 Apparatus for laying a submarine pipeline J-wise |
| 12/10/1980 | EP0020232A1 Method and apparatus for anchoring conduits such as pipe-lines on sea beds |
| 12/09/1980 | US4238824 Line length navigation system |
| 12/09/1980 | CA1091046A1 Method for immersing a negative broyancy device |
| 12/02/1980 | CA1090593A1 Device having a flexible conduit for transferring a fluid through a liquid |
| 11/18/1980 | US4234269 Deployment, release and recovery of ocean riser pipes |
| 11/18/1980 | US4234268 Apparatus for recovering, by means of a pipelaying craft, pipes laid on deep sea beds |
| 11/12/1980 | EP0018898A1 System for anchoring a pipe in the bottom of the sea |
| 11/11/1980 | US4232981 Beaded liquid product and method for reducing coefficient of friction |
| 10/28/1980 | US4230421 Self propelled dynamically positioned reel pipe laying ship |
| 10/28/1980 | US4230420 Semi-submersible pipelaying vessel having an improved pipelaying path |
| 10/28/1980 | CA1088328A1 Side boom pipe laying crane with pipe section alignment feature |
| 10/21/1980 | US4229121 Concrete removal apparatus |
| 10/21/1980 | US4229120 Submarine pipeline alignment rig |
| 09/23/1980 | US4223925 Hot tap machine |
| 09/23/1980 | CA1086288A1 Adjustable apparatus for supporting a pipeline laid on deep waters and for impressing thereto a preselected geometrical configuration |
| 09/16/1980 | CA1085721A1 Method and apparatus for completing diverless subsea flowline connections |
| 09/09/1980 | US4221504 Stabilization of subsea riser pipes having free lower ends |
| 09/02/1980 | USRE30393 Plastic pipe construction |
| 08/20/1980 | EP0014659A1 Flexible device for sucking up large quantities of fluids, especially for pumping seawater from the depth |
| 08/19/1980 | US4218158 Pipe handling method and apparatus |
| 07/29/1980 | US4214692 Butt-welding apparatus for assembling and laying pipe strings in deep water |
| 07/23/1980 | EP0013324A1 Method and apparatus for laying a pipeline on the sea-bottom |
| 07/15/1980 | US4212329 Pipe construction and method of making same |
| 07/15/1980 | US4212248 Apparatus and method for reducing interline twisting |
| 07/15/1980 | CA1081482A1 Offshore pipe laying |
| 07/08/1980 | US4211020 Vertically adjustable mast assembly for a dredge |
| 07/01/1980 | US4209891 Apparatus and method for positioning one part relative to another part |
| 06/26/1980 | WO1980001308A1 Line length navigation system |
| 06/24/1980 | US4209269 Appliance for the assembly of large-diameter pipes by jointing |
| 06/24/1980 | CA1080274A1 Ball and socket joint and a pipeline laying method using ball and socket joints |
| 06/24/1980 | CA1080101A1 Pipeline bending method |
| 06/24/1980 | CA1079907A1 Methods and apparatus for purging liquid from an offshore pipeline and/or scanning a pipeline interior |
| 06/11/1980 | EP0011894A1 A method for installing a tubular element in the bottom of a body of water and apparatus for carrying out this method |
| 06/10/1980 | CA1079060A1 Joining underwater pipelines |
| 06/03/1980 | CA1078630A1 Method and apparatus for installing underground pipelines |
| 05/20/1980 | US4203687 Under water crane |
| 05/06/1980 | US4201074 Submersible pipe installation systems |
| 05/06/1980 | US4200999 Pivotable means for decreasing drag effects on a generally cylindrical dredge pipe |
| 04/29/1980 | CA1076373A1 Device for securing a pipeline in place |
| 04/15/1980 | US4198450 Coating pipes and receptacles with a weighting layer or mass of steel slag aggregate |
| 04/08/1980 | US4197033 Method of installing a pipeline |
| 04/08/1980 | CA1075021A1 Device for mooring and connecting a submarine conduit, and method employing the said device |
| 04/08/1980 | CA1075020A1 Offshore pipe laying |
| 04/01/1980 | CA1074582A1 Drain line and method of installing |
| 03/11/1980 | CA1073225A1 Buoyancy device and method |
| 03/04/1980 | US4191494 Apparatus of effecting buoyancy on submerged articles |
| 02/19/1980 | US4188679 Annular shaped buoyancy element for transport hoses |
| 02/19/1980 | CA1071882A1 Buoyancy systems |
| 01/29/1980 | CA1070653A1 Concrete removal tool |
| 01/22/1980 | CA1070238A1 Low heat conductive frangible centralizers |
| 01/15/1980 | US4183697 Laying of underwater pipelines |
| 01/15/1980 | US4183555 Methods and joints for connecting tubular members |
| 01/09/1980 | EP0006812A1 Method and apparatus for laying submerged pipes |
| 01/01/1980 | US4181484 Device for forming underground pipelines |
| 01/01/1980 | US4181448 Combination roadway and pipeline way in permafrost regions |
| 01/01/1980 | CA1068886A Pipe joint make up tool |
| 12/11/1979 | CA1067928A1 Oval sewerpipe with internal or end surface alignment marks |
| 12/11/1979 | CA1067927A1 Apparatus, methods and joints for connecting tubular members |
| 12/11/1979 | CA1067710A1 Offshore pipe laying |
| 12/04/1979 | US4176985 System and method for installing production casings |
| 12/04/1979 | US4176863 Large diameter ducts for use in the ocean |
| 12/04/1979 | CA1067300A1 Assembling and laying of an uniterwater duct, and start-up device therefor |
| 11/20/1979 | CA1066522A1 Apparatus for supporting pipelines suspended over depressions in the sea bed, particularly suitable for deep beds, and the method for its installation |
| 11/06/1979 | CA1065623A1 Offshore pipe laying |
| 10/30/1979 | US4172688 Device for anti-rolling signalling for cable laying tractors |
| 10/16/1979 | US4171175 Apparatus for underwater welding of pipes |
| 10/16/1979 | US4171174 System for depositing and protecting sand and other littoral draft material |
| 10/16/1979 | CA1064272A1 Passive seabed protection against ice scour |
| 10/09/1979 | US4170079 Dredge with rotatable cutter discs |
| 10/09/1979 | CA1063816A1 Laying of underwater pipelines |