摘要:
A fluid vent (26) for venting fluid from the annulus between the inner surface of a rigid conduit (20) and the outer surface of a conduit liner (10). The fluid vent (26) consists of a length of rigid conduit (34) containing a multiplicity of apertures (32) extending through the wall of the conduit and arranged in an annular pattern around the circumference of conduit (34). The fluid vent (26) further comprises means defining a closed annular volume (36) extending around the exterior circumference of the conduit (34) and interconnecting the outer ends of the apertures (32) with at least one fluid outlet passage (40) located on the exterior of the conduit (34) and communicating with said annular volume (36). The fluid vent can be used to expel water or other liquids from the annular space when retro-fitting a liner to a conduit, venting gas which has permeated through the lining into the annulus, or for assisting in the movement of fluid through the annulus.
摘要:
Device for arresting the propagation of a buckle in a double walled pipe. The device comprising an outer pipe wall having a defined external diameter and placed around an inner pipe wall, defining an annular space between the said outer and inner walls; providing predetermined regions in the annular space which are bounded between two sealing blocks with radially opposed faces which are in contact with the outer and inner pipes; placing a curable compound in each region and curing it the length of each region is at least equal to 0.5 times the external diameter of the outer wall.
摘要:
A flat strip (1) including at least one layer (2) of longitudinal filamentary rovings (3), and means for assembling said filamentary rovings. The assembly means comprise a bonding material (5) and retaining means (4) surrounding and clamping said layer (2). The longitudinal filamentary rovings (3) are agglomerated into a relatively flat strand with a substantially rectangular cross-section, and each filamentary roving (3) has a predetermined average compactness of at least 60%. The retaining means (4) consist of a flat tubular sheath including elements (7) extending transversely to the longitudinal direction of said filamentary rovings (3). Said strip is particularly useful for reinforcing ducts used in the oil industry.
摘要:
A multiple-tube flexible pipe (1) including a central flexible member (2) having high tensile and compressive strength, a casing (8) and a plurality of circumferentially arranged tubes (3) wound around the central flexible member to form at least one ply in a ring-shaped space between said central flexible member (2) and said casing (8). At least one of said circumferentially arranged tubes (3) has low compressive and/or tensile strength. The flexible pipe further comprises at least one flexible compressive force transmitting member (5) arranged in said ring-shaped space and adjacent to said tube (3, 4) having low compressive and/or tensile strength.
摘要:
A reel pipelaying vessel of the type having a main pipeline reel (118) mounted for rotation about a horizontal axis, a variable angle pipeline launching ramp (128) having pipeline straightening and tensioning means mounted thereon and having: an improved pipeline launching ramp arrangement including rack and pinion elevator means (140, 142, 144); an improved level winding mechanism for translating the pipeline straightening and tensioning means as the pipe is spooled onto or unspooled from the reel; sea fastening means for restraining axial movement of the reel while the vessel is in transit, thereby increasing the maximum pipeline load for reel bearings (114, 116) of a given load capacity; sponsons (108, 110) for providing additional flotation and strengthening the hull; an improved arrangement of auxiliary reels (120); a cantilever structure (200) for guiding auxiliary lines, providing access to the main reel and protecting the bridge (218) of the vessel; improved pipeline abandonment and recovery arrangements; an improved reel structure; and an improved pipeline clamping arrangement. A method of converting an existing vessel to a reel pipelaying vessel is also described.
摘要:
It is of the type comprising a corrugated and sealed internal metal tube (1), a pressure vault (2) wound at a short pitch and having an internal surface which faces the corrugations of the corrugated internal tube, an intermediate sheath, at least two groups of inner and outer armoring layers (3, 5), the armoring layers being wound at a lay angle of less than 55.degree., and an outer-sheath (6), and it is characterized in that the intermediate sheath (4) is sealed and is arranged between the two groups of armoring layers (3, 5), the said inner group of armoring layers (3) bearing directly on the pressure vault (2).
摘要:
The invention concerns a flexible conduit comprising an internal gasproof undulating metal tube (1), the wall of which has helical undulations (8), the external surface of said internal tube having at least concave (10) and convex (11) rounded parts corresponding to the internal and external parts of the undulations respectively, and at least an arch (2) arranged around said internal metal tube and made up of at least a form wire (9) coiled in spires. The invention is characterized in that the arch (2) has an internal surface with helical undulation, comprising at least concave (16) and convex (15) rounded parts and the external surface of the internal metal tube is supported in its concave rounded part (10) by a convex part (15) of the arch (2) internal surface and in its convex rounded part (11) by a concave part (16) of the arch internal surface, said internal arch surface and said internal tube external surface matching in form and the interstices (i) between the adjacent spires are small. The invention is particularly applicable to flexible conduits used in oil mining.
摘要:
This invention relates to a flexible metal pipe covered with an impermeable sheath of a shrinkable, preferably semicrystalline polymer or polymers, characterized in that it incorporates between the shrinkable polymer sheath and the metal pipe an intermediate elastomer layer (8), optionally vulcanized or reticulated, and/or a TPE in the form of a continuous tubular sleeve (FIG. 3) or of a tape (FIG. 4 to 6). Sheathed pipes of this type are particularly suitable for flexible pipelines, optionally with suitable supports, for carrying oil and gas.
摘要:
A device for mounting a flexible line including a curvature limiter. The device for mounting a flexible line on a structure, including a hollow rigid member forming part of the structure or fixed to the structure, and which the flexible line passes through after having been pulled with the aid of a pull cable fixed to one end of the flexible line, in particular on the end fitting mounted on the latter for connecting it to the structure, and a curvature limiter engaged on the flexible line and secured to fixing means able to interact with fixing means secured to the hollow rigid member for fastening the curvature limiter to the structure. The device further includes means for immobilizing the curvature limiter on the flexible line at a distance from the end of the latter during a first phase of pulling the flexible line at the end of which the curvature limiter is brought to the level of the mouth zone of the hollow rigid member for the purpose of fastening it, the hollow rigid member comprising, at least during the first pulling phase, a flared mouthpiece.
摘要:
A device for laying flexible tubular conduits from a floating support is provided. The flexible tubular conduit has insulating sheaths and reinforcements where the conduit includes a recoverable flexible tubular handling conduit connected to the flexible tubular conduit. The flexible tubular handling conduit has sufficient mechanical strength to withstand the combined action of the highest internal pressure and the axial tensile force corresponding to the apparent weight in water of the length of tubular handling conduit which is suspended between the floating support and the floor, and on the other hand, the isolated action of the axial tensile force corresponding to the apparent weight in water of the length of flexible tubular conduit when the latter is suspended between the floating support and the floor by the flexible tubular handling conduit.