摘要:
The invention relates to an undersea installation for transporting hydrocarbons between a seabed and a surface and to a method for installing same. The installation comprises a tubular undersea pipeline, a float (14) and a coupling device (10). Said undersea pipeline has a rising part (16), a connecting part (18) and an intermediate portion (20). Said coupling device (10) comprises a first longitudinal part (24) and a second part (25) connected in a coupling region (37) of said first part (24), said coupling region (37) of said first longitudinal part and said float (14) being adapted to be connected together. Said first part (24) is adapted to pivot about said coupling region (37) while bending said intermediate portion (20) when said rising part (16) is unwound and tilts towards said seabed.
摘要:
The invention relates to a system for starting up an on-bottom pipeline (16) for transporting hydrocarbons, wherein said on-bottom pipeline (16) is extended on a seabed (12) from a wellhead (10) to a joint end (17) connected to a riser subsea (18) pipe which is suspended by a catenary, wherein said on-bottom pipeline (16) is embodied in such a way that it is extendable and the system comprises locking means for blocking said end joint on the seabed (12), thereby holding the on-bottom pipeline (16) in the extended position thereof.
摘要:
This method comprises connecting a downstream point (40) of a pipe (24) to a buoy (26) and completely submerging the buoy (26). It comprises deploying in the body of water (12) an intermediate section (30) of the pipe (24) from the downstream point (40) to at least as far as an upstream point (38), anchoring the upstream point (38), and tensioning the intermediate section (30) to keep it vertical. The height of the buoy (26) is less than 1.5 times its greatest transverse dimension. The method comprises moving the buoy (26) between a remote position and an installed position in line with an anchoring region, keeping the buoy (26) partly submerged on the surface (16) of the body of water.
摘要:
The invention relates to an underwater fluid transport apparatus (10) designed to transport a fluid between a sea bed (12) and the surface (14) of the sea vertically above the sea bed. The fluid transport apparatus includes a riser (20) connected to a flexible pipe (32) and a retaining float (24) installed around the riser in order to maintain the riser (20) in a stretched suspended position between the sea bed (12) and a subsurface region situated between the sea bed and the surface (14) of the sea, while the flexible pipe (32) extends in a catenary curve between the riser (20) and the sea surface. According to the invention, the apparatus also includes an additional float (28) installed between the riser (20) and the sea surface (14), and the riser (20) is attached to said additional float (28) in order to increase the buoyancy of thereof.
摘要:
The invention relates to an underwater connection installation (26) and to a laying method for connecting a riser and a flexible pipe (22) that are intended for carrying hydrocarbons. It comprises a bracket (28) attached to a float (20) to suspend the said riser (12). The said bracket (28) comprises a gooseneck pipe (54) that has a bent-over outlet free end (58) ending in a first coupling (60). The said installation further comprises a coupling end piece (32) mounted on the said flexible pipe (22) and comprising a second coupling (86). According to the invention, the said coupling end piece (32) and the said bracket (28) comprise mechanical guide means involving complementary frustoconical rings (64, 84), the driving of the said coupling end piece (32) and of the said bent-over free end (58) causing the said frustoconical rings (64, 84) to engage with one another and to bring about coaxial alignment of the said couplings (60, 86).
摘要:
The invention relates to a method for installing a self-supporting tower. According to the method, an anchoring mechanism (32) is provided and installed on said bed, and a float (18) and a tubular pipe (68) are provided. Next, said float (18) and said tubular pipe (68) are submerged, then said float (18) and the tubular pipe (68) are driven towards said bed (12) in order to hitch one of the ends (72) of said tubular pipe to said anchoring mechanism (32), while said float (18) is securely fastened to the other (70) of the ends in order to keep said pipe (68) vertical above said anchoring mechanism (32). According to the invention, said tubular pipe (68) and said float (18) are supplied separately, and the float (18) is kept submerged at a distance away from said anchoring mechanism (32); and said tubular pipe (68) is suspended from said float (18) via said other (70) of said ends.
摘要:
The invention relates to a novel method for installing an assembly (10) for recovering hydrocarbons escaping from an underwater facility (21), including a first bottom assembly (25) including a rigid canopy having a large surface area, and a second top assembly (26) for raising fluids up to a surface facility (13). The steps of towing the fluid-raising top assembly are carried out concurrently during the installation of the fluid-raising top assembly (26).