| Patents for F16L 1 - Laying or reclaiming pipes; Repairing or joining pipes on or under water (7,464) |
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| 07/17/1991 | EP0266405B1 Concrete ballast block with imbedded or attached anodes for cathodic protection of the bolts and their fittings |
| 07/17/1991 | EP0221153B1 Mooring and transfer system and method |
| 06/26/1991 | CN1052543A Three-way pipe for pilot fluid and confluence |
| 06/11/1991 | US5022421 Fluid connection method and assembly |
| 06/04/1991 | CA1284610C Underwater cryogenic pipeline system |
| 05/28/1991 | US5018903 Pipe connection device |
| 05/21/1991 | US5017415 Self-dispensing spaced electronic markers |
| 05/14/1991 | US5015123 Method and apparatus for installation of drainage field |
| 05/07/1991 | CA1283785C Ballasting method and device for a continuously laid and buried pipe in a trench with temporarily shored sidewalls |
| 04/30/1991 | US5011333 Underwater pipe laying apparatus |
| 04/26/1991 | WO1991006798A1 Method for the mounting of underground pipelines |
| 04/26/1991 | CA2070417A1 Method for the mounting of underground pipelines |
| 04/24/1991 | EP0259373B1 Insulation and weight coating for subsea pipelines and method for production of the same |
| 04/23/1991 | CA1283299C Covering structure intended for laying over a line or the like deposited on the seafloor |
| 04/18/1991 | WO1991004826A1 Method and apparatus for making an underwater weld seam between endwise positioned tubular elements, like pipes |
| 04/16/1991 | US5008075 Preventative maintenance system for underwater pipes |
| 04/16/1991 | US5007768 Anchoring structure for underground pipes |
| 04/03/1991 | CN1050434A 管接头 Fittings |
| 04/02/1991 | US5004017 Pipe stabilizing system for underwater use in joining flanged pipe sections |
| 03/28/1991 | WO1991005196A1 Cable guide tube assembly |
| 03/28/1991 | CA2066622A1 Cable guide tube assembly |
| 03/27/1991 | EP0418257A1 Rehabilitating underground pipes. |
| 03/27/1991 | CN1012210B Lining of pipes |
| 03/21/1991 | WO1991003677A1 Winching apparatus |
| 03/20/1991 | EP0417674A1 Expander tool for hollow workpieces |
| 03/20/1991 | EP0417184A1 Pipe for relining underground pipelines. |
| 03/19/1991 | WO1991004503A1 Electronic markers with predetermined spacing |
| 03/19/1991 | CA2066602A1 Electronic markers with predetermined spacing |
| 03/19/1991 | CA1281807C Method and device of positioning an element using ultrasound sensors |
| 03/15/1991 | CA2024394A1 Expansion tool for hollow working parts |
| 03/13/1991 | EP0394405A4 Pipe liner and method of installation thereof |
| 03/07/1991 | WO1991003673A1 Method for trenchless replacement of a pipeline |
| 03/07/1991 | CA2040424A1 Method for trenchless replacement of pipeline |
| 03/06/1991 | EP0414891A1 Method and device for trench-free laying of pipelines |
| 02/26/1991 | US4995929 Method of protecting conduits including helically winding a strip |
| 02/23/1991 | WO1991002918A1 Pipe joint |
| 02/13/1991 | EP0412752A1 Pipe liner and method of installation thereof |
| 02/12/1991 | US4992001 Method of deepwater pipelay |
| 02/12/1991 | US4991536 Marker for buried objects |
| 02/07/1991 | CA2000955A1 Pipe liner and method of installation thereof |
| 02/06/1991 | EP0411278A1 Method and apparatus for destroying an underground pipe |
| 02/06/1991 | CN1011529B Process for launching of large-size submarine pipeline from mainland |
| 01/29/1991 | US4988236 Underground pipes |
| 01/22/1991 | US4986698 Subsea pipeline method and apparatus |
| 01/15/1991 | US4984934 Pipeline laying system and vessel and method of spooling lines onto the vessel |
| 01/15/1991 | CA1279062C Method and apparatus for moving a pipe through a j-tube |
| 01/08/1991 | US4983071 Pipe bursting and replacement apparatus and method |
| 01/02/1991 | CN1048258A Pipe burster |
| 01/01/1991 | US4981395 Pipe positioner |
| 12/26/1990 | CN1048095A Single compensation method for underground pipe connection |
| 12/25/1990 | US4980116 Lining of pipelines and passageways |
| 12/25/1990 | US4979296 Method for fabricating helical flowline bundles |
| 12/20/1990 | DE3918919A1 Construction of wide underground channel - by excavating three parallel trenches and lining them with concrete |
| 12/19/1990 | EP0403078A2 Method and apparatus for directional drilling |
| 12/14/1990 | CA2006275A1 Method and apparatus for subsoil drilling |
| 12/12/1990 | EP0402167A1 Pipe burster |
| 12/04/1990 | US4974995 Pressure actuated buoy flattener |
| 12/04/1990 | US4974440 Self propelled internal pipe arching apparatus |
| 11/22/1990 | EP0262183B1 Method and means for lining and overwrapping of conduits |
| 11/22/1990 | DE3915863A1 Wide concrete lined under ground channel - is produced by constructing two channels side-by-side |
| 11/22/1990 | DE3914736A1 Pipe laying machine for concrete or stone pipes - consists of milling unit, with basket with back outlet and underneath cutter, with retainer |
| 11/20/1990 | US4971477 Secondary contained fluid supply system |
| 11/13/1990 | US4969677 Pipe pulling grip |
| 11/13/1990 | CA1276117C2 Pipeline formed of pipe sections connected by elastic coupling elements |
| 11/06/1990 | CA1275813C Large diameter burried pipe |
| 11/01/1990 | WO1990012978A1 Process and device for replacing pipelines laid in the ground |
| 10/31/1990 | EP0394405A1 Pipe liner and method of installation thereof |
| 10/30/1990 | US4966494 Low load pipe for pipe jacking |
| 10/30/1990 | US4966290 Vehicle for manipulating pipe |
| 10/24/1990 | EP0393803A1 Method and device for the replacement of underground pipelines |
| 10/09/1990 | US4961671 Method of converting a pipeline laying vessel from a pivotal ramp type to an arcuate type |
| 10/08/1990 | WO1990012235A1 Recoverable sleeve assembly for pipe joint |
| 10/02/1990 | US4960155 Device for permitting a first length of previously commissioned main to be extended by connecting a second length of main thereto |
| 09/25/1990 | US4958959 Method of relining sewers and water lines without excavation |
| 09/18/1990 | US4957173 Method and apparatus for subsoil drilling |
| 09/07/1990 | WO1990010173A1 Improvements relating to the lining of pipelines or passageways |
| 08/21/1990 | US4949664 Indicating means for use in a backfilled trench |
| 08/16/1990 | EP0381743A1 Seabed stabilisation mattresses. |
| 08/11/1990 | WO1990009541A1 Improvements relating to the lining of pipelines and passageways |
| 08/11/1990 | CA2046662A1 Lining of pipelines and passageways |
| 08/08/1990 | EP0381665A2 Process and apparatus for forming a strand of single elements under water |
| 08/08/1990 | EP0381547A1 Method for laying an entrenched conduit |
| 07/11/1990 | EP0377153A2 Boring ram |
| 07/05/1990 | DE3843747A1 Method and device for constructing concrete strips of accurate profile |
| 07/04/1990 | EP0375868A1 Pipe joint |
| 06/28/1990 | WO1990007074A1 Secondarily contained fluid supply system |
| 06/27/1990 | EP0375608A1 Flexible pipe for transporting fluids |
| 06/26/1990 | US4936709 Method and apparatus for laying pipes in the ground with advance of propulsion shafts installed with pipe-supporting attachments |
| 06/26/1990 | US4936707 Method of laying a pipeline |
| 06/19/1990 | US4934897 Pipe-moving apparatus |
| 06/14/1990 | WO1990006466A1 Method of laying a pipe for the transportation of a fluid |
| 06/13/1990 | DE3838537A1 Process for the underground production and for the lining of elongate cavities, in which it is not possible to walk, by the in-situ pipe |
| 06/12/1990 | US4933917 Means for monitoring the laying of a deep sea cable or flexible pipeline |
| 06/06/1990 | EP0371057A1 Polymeric tape with biocide. |
| 06/05/1990 | US4931490 Expandable polymer concretes and mortars utilizing low cure temperature polymers |
| 06/05/1990 | US4930542 Method for restoring underground pipelines |
| 05/29/1990 | US4929124 Method and apparatus for constructing and moving long pipelines |
| 05/29/1990 | US4928866 Pipe burster |
| 05/07/1990 | CA2002249A1 Method and installation for laying a pipeline |
| 05/03/1990 | DE3836440A1 Process for the underground production of lines embedded in the soil in a constraint-free manner |