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WO/1996/027712A1 |
An offshore well is stabilized by at least three cables (33) connected on one end to hydraulically powered cable tensions (31) on the well casing (11) at a location substantially below the surface (17) of the body of water (19) in which ...
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WO/1996/027055A1 |
A damping (40) apparatus and method uses one or more tension elements (43, 44) fabricated from shape memory alloy to cycle through a superelastic stress-strain hysteresis to provide energy dissipation. The method and apparatus can be use...
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WO/1996/025561A1 |
A soft settling structure (1, 3, 4) completed when set on the ground in the water in which a soil improvement is effected or a soil improvement and a slight excavation are effected and having a plurality of water-fillable ballast tanks (...
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WO/1996/023690A1 |
A floating platform constructed of a combination steel/concrete. The platform has a hull or submerged buoyancy section (25) of concrete, from which concrete columns protrude upward (26, 27, 28, 29). The columns continue as steel columns ...
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WO/1996/020313A1 |
An offshore platform structure (10) is disclosed for temporarily using a jack-up rig (34), for well operations in deepwater applications having a bottom founded jacket base (12) which supports a surface tower (28) which extends above the...
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WO/1996/018772A2 |
A method is described for using a particular spring element (32, 33) to facilitate the transfer of deck modules (27) to a hull or jacket (26) during the construction of an off-shore well platform. The spring element (32, 33) not only abs...
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WO/1996/015342A1 |
An access platform (11) to support personnel, for maintenance of a fixed structure such as the supporting leg (10) of an offshore drilling platform, an upright rigid mast (30, 31), fixed to and extending upwardly from the rear of the pla...
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WO/1996/009754A1 |
An artificial land which floats on water surface to facilitate appropriate supply and drainage of water required for plant cultivation and is suitable for plant cultivation in agriculture and forestry. The artificial land comprises a rai...
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WO/1995/033891A1 |
A fixation system (22) which can be automatically engaged or disengaged from a remote control room as well as from a local at each fixation unit. The fixation system (22) that uses a toothed chord chock (39) which is vertically movable t...
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WO/1995/033892A1 |
A construction jack-up barge comprising a barge (11) supporting a tower (13) in a stowed horizontal position for transport and a vertical position for deployment. The tower (13) has three fold out legs (15), each equipped with a footing ...
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WO/1995/027101A1 |
A method is provided to suppress vortex induced vibrations of a portion of a subsea tubular that is subject to vortex induced vibrations, the method comprising the steps of: providing a plurality of shrouds wherein each shroud is capable...
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WO/1995/020074A1 |
An offshore tension leg platform (40) having a deck (42), a hull (41), and a plurality of elongate tendons (46) securing the hull to an ocean floor fondation (43) provides well workover and production capabilities for autonomous operatio...
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WO/1995/019472A1 |
The invention relates to a method for building an offshore platform having pressure-loadable legs (8), by preference also allowing jacking up above the sea surface while the substructure (3, 3', 3, 3a', 8) is resting on the seabed. In or...
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WO/1995/018269A1 |
A compliant tower is disclosed having a foundation (16) connected to a wide-bodied compliant framework (12) with a plurality of vertically extending legs (20) and a minimum of horizontal bracing. The compliant framework is configured to ...
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WO/1995/018268A1 |
A tensioned riser deepwater platform suitable for offshore oil and gas applications is disclosed having a foundation (16) secured to the ocean floor, a topside facility above the ocean surface, and a vertically extending tower jacket (12...
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WO/1995/016829A1 |
In constructing a gravity offshore structure at an installation site having a relatively large depth of water, a footing (2) serving as a float as well is built in a dry-dock, and a cylinder (4) which constitutes an underwater substructu...
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WO/1995/014824A1 |
This invention relates to a vessel for removing offshore platform constructions characterized in that it comprises a main part (1) having an essentially U-shaped horizontal shape, a foundation (4) being located on the deck of the main pa...
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WO/1995/009280A2 |
An offshore platform structure for well operations in deep water areas comprises: a bottom founded jacket base (12); a surface tower (28) and platform deck (32) supported by the jacket base (12) and extending above the water surface (30)...
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WO/1994/019548A1 |
A system of corrosion protection and a method of applying the protection on items to be used or being used in marine environments and otherwise susceptible to the deleterious effects of erosion and/or corrosion. The protection is compris...
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WO/1994/015829A1 |
A composite marine structure comprises a marine substrate (34) having adhered to at least a portion of its surface a layer of a water-permeable composite article (14) comprising a non-woven fibrous web (16) having entrapped therein activ...
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WO/1994/006970A1 |
Foundation arrangement for an offshore framework construction or subsea installation for use in oil or gas operations and the like, in particular where the seabed consists of relatively solid sand or of clay, and the framework constructi...
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WO/1994/000643A1 |
In a method for temporary mounting of heavy structural parts (2) on a load-bearing support structure (1) in the correct position for subsequent permanent assembly, elastic spring elements (4) are used between the structural parts (1, 2),...
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WO/1993/023325A1 |
A lifting device for a cast steel structure (1) includes a releasable or integrally formed pin (2) to which a shackle (4) or spreader bar assembly can be secured thereby regarding the need for conventional bollards or inset sheaves.
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WO/1993/021392A1 |
A wrapping (2) for a conductor, riser or pile (1) on an offshore rig is a composite sheet with an outer skin (3) of impermeable resilient flexible material and an inner layer (4) of felt impregnated with a thixotropic gel. The edges of t...
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WO/1993/020289A1 |
A method and apparatus for transporting and using a drilling apparatus (10) or a construction crane apparatus (308) from a single movable vessel is provided. Either a drilling apparatus or a construction crane apparatus is skidded onto t...
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WO/1993/018999A1 |
There is shown a method and apparatus for transfer of loads from a vessel (13) that moves with heavy seas to a stationary or mobile installation (3) by the use of at least one lifting cable (4) or wire and at least one hoisting means (1)...
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WO/1993/015277A1 |
A process and apparatus for creating a controlled environment about a portion of a submerged pile (10) to be treated comprising a jacket (20) fitted about the pile (10) and sealed at both the top and bottom ends relative to the pile (10)...
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WO/1993/014970A1 |
An anti-fouling coating for a tubular structure (11) having an electrically insulating anti-corrosion coating (12) is provided by a plurality of panel sections (15) of anti-fouling material bonded to the surface of the anti-corrosion coa...
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WO/1993/011996A2 |
There is disclosed methods of cleaning or etching the surfaces of objects immersed in liquid comprising focusing an acoustic field adjacent a surface of an object and producing cavitation in the liquid at the point of focus. The method m...
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WO/1993/003230A1 |
A structure (20) to stand offshore comprises a shield portion (21, 22, 23) that is capable of resting on a seabed and resisting loads imposed by waves and drifting ice, a support portion (26, 28, 30, 31) for supporting a payload independ...
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WO/1993/002254A1 |
A method of preventing aquatic organisms from adhering to the surface of an underwater structure (12) or of water intake facility, in which: a part of said surface to which aquatic organisms adhere is coated with a plurality of metallic ...
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WO/1993/000482A1 |
Removable offshore platform the lower part of which comprises a base (4) which in the position of use rests on the seabed and the platform comprises at least a column (1) extending upwards from the base. The upper end of the column exten...
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WO/1992/019816A1 |
A locking apparatus (40) and method for an offshore jackup rig (10) having at least one leg (14) extending through the hull (12) and at least one set of rack teeth (18) attached to each of the legs. One or more locking bars (44) are supp...
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WO/1992/018379A1 |
An underwater servicing device comprising a substantially hollow housing (30) having an open face (32) whereby the configuration of the open face (32) substantially conforms to the surface of an article to which the housing (30) is to be...
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WO/1992/017650A1 |
A deep water platform (100), suitable for use as a hydrocarbon exploration or production facility in very deep offshore waters, and a method of constructing the same are shown. The platform is positioned on top of a plurality of flexible...
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WO/1992/008849A1 |
A floatable structure (10, 12) such as a jack-up barge has a plurality of legs (14) upon which the structure may be supported and raised. Each leg is pivotable between an upright operative position and a recumbent storage position and me...
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WO/1992/008007A1 |
A skidbase (16) and a drilling structure (18) are adapted for transfer between a jack-up platform (12) and a fixed platform (14). The jack-up platform (12) is moved into position adjacent the fixed platform (14) and raised to a height al...
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WO/1992/007691A1 |
Apparatus for cleaning underwater structures such as oil rigs (1, 2) which suffer from marine growth, rust, etc. Grit blasting is a known method of cleaning in such circumstances but this has certain disadvantages not the least of which ...
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WO/1992/004504A1 |
An adjustable width split sleeve (13) adapted to be securely wrapped around an elongate member (15). Each end of the sheet is wrapped around a respective first rod. Each first rod is rotated about a second which is parallel and adjacent ...
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WO/1992/000423A1 |
An access platform (11) to support personnel, for example, for maintenance of a fixed column (10) or like structure, comprising a rectangular base frame (12) having upstanding vertical corner members (13) and a rectangular guard rail (14...
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WO/1991/014831A1 |
This casing is bounded by a cylindrical or frustro-conical wall comprising corrugations (3) turned towards the outside, regularly spaced and oriented along the generatrices, the shape of these corrugations (3) being defined so that each ...
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WO/1991/012377A2 |
The handling mechanism is comprised of an output pinion configured like an elongate sleeve susceptible of torsion and provided with a device for measuring the torque withstood by the pinion. The torque measuring device is comprised of a ...
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WO/1991/006714A1 |
Method and device for manufacturing an artificial, in particular a column-shaped structure (1) on the bottom of a body of water by manufacturing first a part of the structure at a distance from its destination on a series of pontoons (16...
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WO/1991/005133A1 |
An anti-fouling covering (10) is applied to a tubular (11) of a tubular off-shore structure to prevent fouling of the tubular by marine growths and comprises metal sheeting (13) which is deformed to provide spaced ridges or troughs (14) ...
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WO/1991/001411A1 |
The invention relates to a jackable oil rig designed for large ocean depths and which comprises at least one leg and a deck having a jack system. The rig's leg comprises a number of corner columns together with transverse bracing stays a...
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WO/1990/012158A1 |
A platform recovery and re-use unit as illustrated in Figs. 1, 2 and 3 comprising a series of buoyant cellular caissons (2) designed to be assembled as one complete caisson encircling a platform jacket (4) below the surface of the water ...
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WO/1990/008232A1 |
A method serves to mount the piles (6) associated with the installation of a pile-founded offshore platform, e.g. a production platform, wherein these are driven down into the sea bed through pile guides (12) attached to or forming part ...
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WO/1990/003470A2 |
A method and apparatus for erecting and removing offshore structures including a jacket (100) and a platform (7a) is disclosed. The system of the invention includes a platform-lifting unit (2), a jacket lifting unit (110), and a control ...
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WO/1989/012144A1 |
A substantially continuous copper-containing marine antifouling surface (7) is formed on a marine structure (5) by attaching thereto a composite comprising a plurality of strips of copper (1) (or copper alloy) mounted side-by-side on a s...
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WO/1989/005379A1 |
A method of installing an offshore construction, includes fabricating platform support columns (30) from a plurality of interconnected column sections (40). The method comprises placing a first column section at the surface of a body of ...
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