EP0565445B1 - Vorrichtung zum Verlegen eines mit einem Krümmungsbegrenzer versehenen flexiblen Rohrstrangs - Google Patents

Vorrichtung zum Verlegen eines mit einem Krümmungsbegrenzer versehenen flexiblen Rohrstrangs Download PDF

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Publication number
EP0565445B1
EP0565445B1 EP93400912A EP93400912A EP0565445B1 EP 0565445 B1 EP0565445 B1 EP 0565445B1 EP 93400912 A EP93400912 A EP 93400912A EP 93400912 A EP93400912 A EP 93400912A EP 0565445 B1 EP0565445 B1 EP 0565445B1
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EP
European Patent Office
Prior art keywords
flexible line
bend restrictor
traction
fixed
flexible
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93400912A
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English (en)
French (fr)
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EP0565445A1 (de
Inventor
René Maloberti
Alain Coutarel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technip France SAS
Original Assignee
Coflexip SA
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Filing date
Publication date
Application filed by Coflexip SA filed Critical Coflexip SA
Publication of EP0565445A1 publication Critical patent/EP0565445A1/de
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Publication of EP0565445B1 publication Critical patent/EP0565445B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • E21B17/017—Bend restrictors for limiting stress on risers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/0107—Connecting of flow lines to offshore structures
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E21B43/013—Connecting a production flow line to an underwater well head
    • E21B43/0135—Connecting a production flow line to an underwater well head using a pulling cable

Definitions

  • the subject of the present invention is a device for mounting a flexible line to a structure, comprising a hollow rigid member forming part of said structure or fixed on said structure, and which the flexible line crosses after having been drawn using 'a traction cable fixed to one end of said flexible line, in particular on the end fitting mounted thereon for its connection to said structure.
  • the present invention is particularly intended for "offshore” petroleum exploitation.
  • the term “flexible line” means flexible conduits, in particular flexible tubular conduits for conveying fluids such as hydrocarbons, composite bundles of the “bundle” type, umbilicals, or electrical cables.
  • structure is meant any fixed or mobile structure usable in the "off shore” field, such as a rigid fixed “jacket” structure, an oscillating structure subject to the sea floor or a floating structure such as a naval surface support. , a semi-submersible platform, a floating vertical column, anchored, connected to an oil tanker for storage / separation which is moored to it, a buoy etc.
  • the invention relates to a device comprising a curvature limiter engaged on said flexible line and secured to fixing means capable of cooperating with fixing means secured to said hollow rigid member to achieve embedding of the curvature limiter on said structure.
  • curvature limiter any type of device making it possible to impose on the flexible line a radius of curvature greater than a minimum radius of curvature in an area where the flexible line is subjected to bending, in particular repeated bending, risking cause its deterioration.
  • the curvature limiter can be of any known type, for example, consisting of rigid articulated elements called “vertebrae”, or preferably in the form of a stiffener.
  • Known stiffeners are generally blocks molded from plastic material such as polyurethane, at least in shape frusto-conical part, placed on the flexible line and embedded on a mounting support mounted on and / or around the flexible line.
  • embedding within the meaning of the invention means a rigid mechanical connection, at least in bending and with respect to lateral translations, between the curvature limiter and its embedding support, that is to say a connection such that the embedding support blocks the angular displacements (curving around any axis perpendicular to the axis of the flexible line) and the transverse displacements of the curvature limiter, and consequently of the flexible line, the associated values of bending torques and support forces being fully supported by the mounting support.
  • said embedding may be an integral embedding, also ensuring the blocking of the axial displacements and of the effects of torsion around the longitudinal axis of the flexible pipe.
  • the hollow rigid member is a part of the structure or a member firmly embedded in the structure, such as a platform, to which one end of the flexible pipe is connected, said hollow rigid member having a central opening for the passage of the flexible line and constituting the last support bridge of the flexible line on the support platform, in the manner of an hawk.
  • the hollow rigid member which constitutes the embedding support of the curvature limiter is an end section of a guide tube in which the flexible line is engaged, the embedding being carried out in the lower mouth area of the end section of the guide tube.
  • guide tube within the meaning of the invention is meant both a vertical tubular element (I tube) and a tubular element with progressive cant (J tube).
  • the function of guide tube can, as a variant, be fulfilled by a trellis, or any other form of frame having an internal passage to guide the flexible line.
  • This technique can be used in different configurations of operating systems of underwater oil fields and for example in a production installation comprising one or more pipes or "flow-lines" connecting the different heads of underwater wells, or other equipment disposed on the bottom, to a structure forming a surface support as described above or to a subsurface structure, located at an intermediate level between the surface and the seabed, said structure comprising various equipment and, in in particular, piping elements which must be connected by the flexible pipe to the equipment arranged on the bottom.
  • the production installation may include, instead of equipment disposed on the bottom, a second surface support, or subsurface, to which is connected the second end of the flexible pipe which is either entirely suspended in a chain between the two supports, either rests partly on the bottom.
  • a flexible pipe is unwound from a laying vessel, a first end of the pipe being pulled by the "pull-in” technique so as to be able to connect this first end of the flexible pipe to the edge of the surface support opposite which the laying vessel is positioned.
  • the hose is then suspended "in a chain" between the laying vessel and the surface support. Then the laying vessel moves away and begins to unwind the flexible pipe on the bottom.
  • the second end of the flexible pipe is connected by a traction cable to the surface support then pulled on board and connected.
  • connection between the end fitting of the flexible pipe and the network of pipes installed on the support structure is made above the water surface, at a working bridge for example.
  • Such a device has the advantage of facilitating the connection of the flexible pipe on board the platform.
  • this device presents relatively serious risks for the flexible tubular pipe, which, devoid of protection, must cross the splash zone.
  • the connection between the flexible pipe and the platform is made below the surface of the water, preferably in the lower part of the platform in the vicinity of Keel.
  • a curvature limiter in the form of a stiffener, securely recessed, aimed at distributing the bending stresses and at preventing the radius of curvature imprinted on the flexible line from reaching a critical lower value below which the flexible line risks being rapidly put out of use.
  • Such a device has the obvious disadvantage of requiring difficult and costly operations, subject to weather conditions, to make the subsea connections.
  • US-A-4 808 034 which constitutes the prior art corresponding to the preamble of claim 1 appended, describes a device for connecting a flexible pipe to a floating structure in which an annular guide plate is joined to a stiffener mounted loose around the flexible pipe.
  • the guide plate comprises, projecting from its front end, fastening parts cooperating with corresponding hollow parts made at the lower end of the vertical guide tube fixed to the structure.
  • cables are fixed to the fixing parts arranged projecting at the periphery of the guide plate and the assembly consisting of the guide plate secured to the stiffener and the pipe provided with its end piece is pulled upwards, the latter being in abutment on the shoulder formed by the internal edge of the guide plate. Simultaneously another lifting cable is brought in, axially arranged and fixed to the end piece.
  • This known device requires the use of a plurality of traction cables during different stages.
  • This device is very difficult to implement, in particular in the case of flexible lines of which a certain length rests on the bottom, to ensure the traction of flexible lines of significant length and of high weight, weight to which are added the weights of the end piece, the stiffener and the guide plate.
  • the device described in the prior document is, taking into account the configuration of the means provided for the relative positioning and the fixing of the guide plate and of the end of the guide tube, limited to an implementation with a vertical guide tube.
  • this device has the serious drawback that the embedding of the stiffener, as it is achieved by fixing the guide plate on the end of the guide tube, lack of solidity.
  • the present invention proposes to provide a device which is easier to implement than the previously known devices, and is not limited to an implementation with a vertical guide tube, while allowing efficient and reliable embedding. of the curvature limiter, in particular underwater and preferably without the intervention of divers.
  • the main subject of the present invention is a device as defined in claim 1.
  • the installation operation of the flexible pipe and the connection device according to the invention comprises two phases of pulling the flexible pipe by "pull-in", these two phases being separated by an intermediate step during which the curvature limiter is immobilized on the structure. It should be noted that, according to the invention, the traction of the flexible pipe, during each of the two successive phases of traction is carried out by hauling a single and same cable which is the traction cable fixed to the end fitting flexible pipe.
  • the device according to the invention thus has the advantage of allowing an easy installation operation, in comparison with the device described in US-A-4 808 034 which requires a set of complementary cables fixed peripherally on projecting end pieces of the guide plate mounted on the curvature limiter for carry out the first phase of traction preceding the fixing of the guide plate to the lower end of the guide tube.
  • Another advantage of the device according to the invention is that, during the entire duration of the installation operation of the flexible pipe and, subsequently, during the operation of the installation in service, it allows, at the location critical corresponding to the upper zone of the free part of the flexible pipe which is located just below the mouth of the hollow rigid member serving as a hawk, to permanently ensure a regular distribution of the bending stresses and limiting the radius of curvature of the flexible line relative to the minimum value allowed.
  • this result is obtained thanks to the flared mouthpiece provided in the mouth area of the hollow rigid member, such as the end section of a guide tube. .
  • this function of controlling the curvature of the flexible line is carried out by the curvature limiter which was built into the structure.
  • the device according to the invention also has the advantage of allowing solid embedding of the curvature limiter, the positioning operation being able to be carried out easily.
  • the installation of the device is carried out without plungers by means of remote-controlled members from the surface.
  • the means for immobilizing the curvature limiter on the flexible line during said first traction phase can be released from said curvature limiter after immobilization thereof.
  • the curvature limiter is mounted on the flexible line with a radial clearance so as to allow, after release of the immobilization means of the curvature limiter, which remain locked axially on the flexible line, a sliding of the flexible line relative to the curvature limiter.
  • the second traction phase allowing the final positioning of the flexible line by sliding inside the rigid hollow member until the final connection of the end fitting to the structure.
  • the flared mouthpiece can be permanently mounted on the hollow rigid member or is separable to allow the implementation of the mechanical members which carry out the embedding.
  • the embedding of the curvature limiter can be carried out by any appropriate means, in particular by assembling, with the aid of fixing members, flanges facing the curvature limiter and the hollow rigid member, or by engagement in correspondence of forms of two complementary bearing surfaces, for example frustoconical, facing, of the curvature limiter and of the hollow rigid member or of the flared mouthpiece.
  • the complementary bearing surfaces are preferably applied one against the other with sufficient axial force by clamping means, such as a screw-nut assembly or advantageously a clamp with corner effect.
  • the means for immobilizing the curvature limiter on the flexible line achieve permanent attachment of the curvature limiter on the flexible line, the embedding being effected by sliding fitting cylindrical bearing surfaces facing one another the curvature limiter and the hollow rigid member.
  • the distance between the location at which the bend limiter is immobilized on the flexible line and the end of the flexible line which must be connected to the structure must be predetermined so that, in the installation position of the curvature limiter, the end of the flexible line is at the level provided for its connection to the structure.
  • FIG. 1 We first refer to Figure 1 where we see an offshore oil production facility comprising a floating vertical column 1 provided with anchor lines 2 to the seabed.
  • Rigid guide tubes 3 are fixed along the structure that constitutes the floating column 1, inside which are engaged, for the ascent of the hydrocarbons, flexible tubular conduits 4 which may be of the type of those manufactured and sold on a large scale. length and in different diameters by the applicant company.
  • the flexible tubular conduits 4 are equipped, in a known manner, with a set of buoys 5 so as to determine a zone with a concavity of opposite direction oriented towards the bottom.
  • each flexible tubular pipe 4 at the lower end of the corresponding guide tube 3, there is provided a curvature limiting element 6 which will be described in more detail below.
  • FIG. 1 also shows schematically a vessel 7 used for laying flexible tubular conduits 4.
  • the curvature limiter 6 of this embodiment is produced in the form of a stiffener, in particular made of polyurethane, put in place with a radial clearance on the flexible tubular pipe 4 before the latter has been provided with its end piece. 'end 8. This radial clearance allows relative sliding between the stiffener and the flexible pipe after the embedding of the stiffener, described below.
  • the stiffener can be of any known type and in particular of one of the types described in patent application PCT / FR91 / 01073 of the applicant company and corresponding to document WO-A-9212376 published on 07.23.92, ie after the priority date attached to the present invention.
  • a mouth piece 9 On the lower end of the mouth of the guide tube 3 is mounted a mouth piece 9, in the shape of a trumpet, comprising a flange 10 for its attachment to a flange 11 at the end of the mouth of the guide tube 3 .
  • the stiffener 6 has a flange 12 at its front end.
  • An immobilization means such as a retaining collar 13, is put in place and securely fixed on the flexible pipe 4 behind the stiffener 6 so as to immobilize the latter in position on the flexible tubular pipe during the first phase to raise it, as will be described, said collar 13 being able to be separated from the stiffener 6 once the embedding has been carried out.
  • the end piece 8 is connected to the end of a cable traction 14 associated with lifting means, such as a winch mounted on the structure, such as the column 1 to which must be connected the flexible tubular pipe.
  • lifting means such as a winch mounted on the structure, such as the column 1 to which must be connected the flexible tubular pipe.
  • a pulling force is exerted upwards on the cable 14, which causes the assembly constituted by the end piece 8, the flexible tubular pipe 4 and the stiffener 6 , held in abutment by the collar 13, until the end piece 8 after having passed through the flared mouthpiece 9 in the shape of a trumpet at the lower end of the guide tube 3, enters the latter by driving driving 4.
  • the flared mouthpiece 9 provides continuous support with a determined curvature to support the flexible pipe in its critical zone so as to maintain its radius of curvature above the minimum value admitted and prevent its damage.
  • the dismantling of the mouthpiece is then carried out, by disassembling the flanges 10 and 11, which then allows the flange 12 of the stiffener 6 to be assembled with the flange 11 at the lower end of the guide tube 3.
  • the collar 13 can be left in place on the pipe 4.
  • the collar 13 is fixed in advance on the flexible line 4 in a position such that the length of flexible line between the collar and the end piece 8 is sufficient for the collar to be spaced a certain distance apart. relative to the rear end of the stiffener, when, once the pulling operation is completed, the end piece 8 is definitively connected to a connection member of the support platform such as a flange 38 ( Figure 8).
  • This arrangement illustrated in FIG. 4, makes it possible to prevent the collar 13 from hitting the stiffener 6 when, subsequently, the length of the flexible pipe 4 is caused to vary slightly depending on the conditions of service, for example. example due to the internal pressure in the pipe, sliding inside the stiffener 6.
  • the flexible pipe 4 is raised to the maximum, so that the collar 13 pushing the stiffener 6 with the flange 12 against the flange 11, the embedding of the stiffener 6 is achieved by fixing the two opposite flanges for example by bolting, the end piece 8 being at a level a little raised relative to the flange 38 to which it must be connected.
  • connection between the end piece 8 and the flange 38 is then made by slightly lowering the flexible pipe 4 which slides through the stiffener 6 which makes it possible to separate the collar 13 from the stiffener.
  • the guide tube 3 used in the illustrated embodiment is of the "J tube” type, that is to say a progressive cant tube.
  • the invention is in no way limited to implementation with a vertical guide tube of the "I tube” type.
  • the mouthpiece 15 in the shape of a trumpet is, unlike that of the previous embodiment, permanently mounted at the lower end of the guide tube 3.
  • the stiffener 16 is provided with a fixing flange 17 capable of coming to bear on an end flange 18 provided at the end of the mouthpiece 15.
  • the stiffener 16 and the flange 17 are integral with a male frustoconical part 19 which is constituted by a rigid structure, for example made of sheet steel, with clearance surrounding the flexible pipe 4, and the surface of which external, continuous or discontinuous, constitutes a mounting surface, of generally frustoconical shape, which corresponds to that of the female frustoconical recess 20 of the mouth piece 15.
  • the facing surfaces of the frustoconical parts, respectively male and female, 19 and 20 form regulated and axisymmetric geometric surfaces.
  • these surfaces are in the form of cones of revolution of the same angle.
  • the mouthpiece 15 comprises a plurality of pawls 21, pushed by springs 22, and capable of sliding in housings 23 arranged radially in a same plane perpendicular to the axis of the central cylindrical passage that presents the part 15 and in which flexible pipe 4 must be housed.
  • a groove 24 is provided in the external surface of a front part which extends the male frustoconical part 19 and which constitutes a rigid structure integral with this male frustoconical part 19.
  • This front part has a passage central, for example cylindrical, inside which the flexible pipe 4 is arranged, and an outer surface, of general shape, for example cylindrical, such that it can take place inside the upper part of the part d '' mouth 15.
  • the front end of the front part integral with the male frustoconical part 19 comprises an element 39 produced so as to be able to be fixedly fixed on the flexible pipe 4.
  • the front part integral with the male frustoconical part 19 has a rupture zone 25 which has a limited determined value of resistance to the axial traction force, so that it can be broken when the cable 14 exerts a traction greater than the resistance limit value.
  • the rupture zone 25 can be produced according to any known principle, for example by a cylindrical sleeve of reduced thickness, a cylindrical sleeve comprising a plurality of holes of a certain diameter, or a groove, or even a plurality of longitudinal studs forming a cylindrical cage.
  • the end fitting 8 having penetrated into the mouthpiece 15 the flexible pipe 4 is guided in the female frustoconical bearing which, like the mouthpiece 9 of the previous embodiment, allows it to maintain its radius curvature above the minimum allowable value.
  • the pawls 21 engage in the groove 24 immobilizing the stiffener by relative to the guide tube.
  • the pawls may have an asymmetrical profile allowing, in combination with the profile of the groove 24, automatic engagement in the upward pulling direction, and blocking of the device in the opposite direction.
  • the pawls 21 ensure the immobilization of the stiffener 16 temporarily, prior to its embedding, so that the realization of the embedding is made easier.
  • the width of the groove 24 in the direction of the axis of the flexible pipe is slightly greater than that of the pawls 21, the resulting longitudinal play making it possible to secure the embedding in an easier and more solid manner.
  • the flanges 17 and 18 are then facing each other, at the start of contact or at a very short distance, without however being tightened.
  • the rupture zone 25 is torn off, the flexible tubular pipe 4 being able to slide inside the guide tube 3 up to its final position of connection with the support platform, the end piece 8 being connected to the connection member, such as the flange 38, secured to the platform ( Figure 8).
  • a clamp 26 comprising two jaws articulated around the mouthpiece 15, capable of coming to cap the flanges facing 17 and 18, the peripheral profile of the flanges and the peripheral profile of the jaws, being suitable for, when applying the collar to the flanges, causing by corner effect an axial movement of the flanges towards one another. 'other so as to bring in tight contact the frustoconical parts 19 and 20 respectively integral with the stiffener and the mouthpiece.
  • At least one of the flanges and the corresponding part of the collar 26 have a ramp-shaped peripheral profile making it possible to obtain, by virtue of a relatively small clamping force on the collar, a sufficient axial compressive force between the parts tapered male and female 19 and 20 so as to achieve a solid embedding.
  • the collar 26 may be a member independent of the other elements of the device, or it may be carried by the assembly constituted by the stiffener 16 and the male frustoconical part 19, or also, as illustrated in the advantageous variant of FIGS. 5 to 8, it can be supported by the mouthpiece 15.
  • the clamping function from the outside performed by the collar 26 essentially has the effect of ensuring the resumption of the relatively weak axial forces, and not of ensuring resistance to the bending moments applied by the pipe.
  • the operation of closing the jaws of the clamp 26, which makes it possible, as described above, to ensure both clamping and locking, achieving the final embedding of the embedding surfaces 19 and 20, can be made as soon as the pawls 21 are in place in the groove 24, or alternatively, once the flexible pipe 4 is put in place and the end piece 8 connected to the platform.
  • a groove 27 capable of receiving clamping punches 28 capable of sliding radially in a guide flange 29 mounted on the mouth piece 15.
  • the various punches 28 are capable of being moved radially so as to engage in the groove 27 under the action of a rotating ring 30 provided with ramp-shaped surfaces 31, the rotation of the ring around the axis of the frustoconical part 20 causing the pushers 32 to radially driving the clamping punches.
  • the rotation of the ring can be achieved by any suitable means, in particular by pulls, jacks, spur gears or tangent screw, or by means remotely controlled from the surface.
  • the location of the clamping punches in the female frusto-conical part is determined so that, as in the previous embodiment, the cooperation of the ramp-shaped surfaces of the groove 27 and the punches 28 which act as keys tightening causes by corner effect, a final axial movement of bringing together the frustoconical facing surfaces respectively secured to the stiffener and the part mouthpiece to achieve an exact and solid embedding in correspondence of shapes of the corresponding parts.
  • Ratchets (not shown), in cooperation with the groove 24, provide the retaining function beforehand, in the same way as in the previous embodiment.
  • a mouthpiece 33 is permanently fixed to a cylindrical tube 40 forming the lower end of the guide tube 3.
  • the stiffener 6 is secured by its end flange 12 with the rear end flange 34 of a cylindrical part 35 the outside diameter of which corresponds with a slight clearance to the inside diameter of the tube 40 in order to embed in correspondence of shapes inside the tube 40.
  • the part 35 in the form of a cylindrical cuff has a conical end portion 36 and is preferably produced in two rigid half-shells comprising clamping means 37 on the flexible tubular pipe 4.
  • the part 35 is thus firmly fixed on the pipe 4 and ensures, in a non-releasable manner, the immobilization of the stiffener on the latter at a determined distance from the end piece 8.
  • the cuff 35 integral with the stiffener realizes an embedding in correspondence of shapes with the cylindrical tube 40 forming the lower end of the guide tube 3.
  • the tube 40 constituting the end of the guide tube 3 has its own manufacturing tolerances and may have been locally deformed, in particular by welding or various manipulations.
  • the stiffener 16 constitutes the rear part of an assembly which has an axial central passage for the flexible pipe 4 and which comprises a rigid male frustoconical part 19, as well as 'a front part whose front end comprises an element 39 which can be fixedly fixed in the manner of a collar on the pipe 4 and thus constituting a means for immobilizing said assembly integral with the stiffener 16.
  • the front part has a rupture zone 25 as described above.
  • the outer surface of the frustoconical part 19 comprises an annular hollow part 41 whose contour has, in its front part, a conical bearing 42.
  • the traction cable 14 By pulling from the support platform, the traction cable 14, the end of which is connected to the end fitting 8 of the pipe 4 and which passes through the central opening which the mouthpiece 15 is integral with the platform 1 to in the vicinity of its lower part, the flexible pipe 4 and the integral assembly of the stiffener 16 are brought up, which remains immobilized on the flexible pipe, during the first phase of the traction operation, by means of the clamp 39.
  • the mouthpiece 15, which can constitute the lower part of a guide tube 3, comprises a female frustoconical part 20 defining a conical internal surface which is in correspondence of shapes with the external surface enveloped by the male frustoconical part 19.
  • a plurality of latches or dogs 43 are arranged inside housings 44 where they are guided so as to be able to be movable in translation along radial axes relative to the longitudinal axis of the part frustoconical 20.
  • Springs 45 push the latches 43 towards the center.
  • the front part, directed towards the axis of the latches has, in a meridian plane passing through said longitudinal axis of the device, an outer contour in the form of a wedge 46.
  • the male frusto-conical part 19 penetrates inside the female frusto-conical part 20 and comes into contact with the front part 46 of the latches 43, at the conical surface 47 of the male frusto-conical part 19 which is located just in front of the hollow part 41.
  • the zone concerned of the front part 46 (dashed line on the right half of FIG. 15A) has a cam profile such that the latches 43 are pushed back inside. housings 44 by compressing the springs 45, so as to release the interior surface of the female frustoconical part 20 (line in solid line on the right half of FIG. 15A).
  • the latches 43 When the frustoconical parts, respectively male and female 19 and 20, come to bear one on the other at the end of the first phase of the traction operation, the latches 43 are then in face of the hollow part 41 in which they penetrate under the action of the springs 45, to be again in the extended position as illustrated in the left half of Figure 15A.
  • the active zone of the front part 46 of the latches 43 which is the anterior zone on the top side of the conical shapes 19 and 20, has a cam profile such as the latches 43, penetrating inside the hollow part 41, bear on the conical bearing 42.
  • the latches 43 fill, both and successively, in cooperation with the hollow part 41 and the comic reach 42, on the one hand the provisional retaining function of the stiffener provided, for example , by the pawls 21 engaging in the groove 24 in the case of the variant of FIGS. 5 to 8, or of the variant of FIGS. 9 to 11, and, on the other hand, the tightening function of the embedding members which was produced by the collar 26 with the flanges 17 and 18 in the case of the variant of FIGS. 5 to 8, and by the punches 28 penetrating into the groove 27 in the case of the variant of FIGS. 9 to 11.
  • the device is then permanently locked in the embedding position thus produced.
  • various known mechanical means can be used allowing, independently of the action of the springs 45, to irreversibly lock the latches 43 against the conical bearing 42 opposite.
  • bolts 48 are used which are directed along the same radial axis of the housings 44 as the latches 43, and which are pushed into abutment against the rear face of the latches 43 by screwing in nuts 49 integral with the housings 44.
  • the bolts 48 can be screwed, for example, by a remote-controlled underwater robot such as a ROV (Remote Operated Vehicle).
  • ROV Remote Operated Vehicle
  • the latches 43 can be locked by fingers, similar to the clamping punches 28 illustrated in FIGS.
  • a rotary ring having ramp-shaped surfaces which constitute a cylindrical or conical surface around the longitudinal axis of the frustoconical part 20, and not inscribed in a radial plane, in this case, the ramps can act, still by wedge effect, on a lateral face of the rear part of the latches having a suitable angle slope. It is also possible to produce such devices that are entirely remote-controlled from the surface, for example by using hydraulic drive members.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Supports For Pipes And Cables (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Flexible Shafts (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Revetment (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Claims (14)

  1. Vorrichtung zum Verlegen einer flexiblen Leitung, wobei die Vorrichtung an einem Aufbau angeordnet ist und die flexible Leitung (4) über ein Ende derselben mit einem Zugkabel gezogen wird, mit einer steifen, hohlen Einrichtung (3; 3, 40), die als Teil des Aufbaus gebildet oder an dem Aufbau befestigt ist, wobei die Einrichtung von der flexiblen Leitung durchlaufen wird, nachdem diese von dem Zugkabel gezogen wird und einem festen Krümmungsbegrenzer (6, 16), der mit der flexiblen Leitung in Eingriff gebracht werden kann mit Mitteln, die mit festen Mitteln der steifen, hohlen Einrichtung zusammenwirken können, zum Realisieren eines Aufnehmens des Krümmungsbegrenzers an dem Aufbau,
    dadurch gekennzeichnet, daß
    die Vorrichtung Mittel (13, 35, 39) zum Festsetzen des Krümmungsbegrenzers (6, 16) auf der flexiblen Leitung (4) enthält, mit einem Abstand zu dem Ende desselben, wobei die Mittel zumindest während einer ersten Zugphase der flexiblen Leitung im Einsatz befindlich verbleiben und am Ende derselben der Krümmungsbegrenzer in den Bereich der Krümmungszone der steifen, hohlen Einrichtung (3; 3, 40) herangeholt wird, im Bereich ihrer Aufnahme, wobei weiterhin die steife, hohle Einrichtung zumindest während der ersten Zugphase ein konisch erweitertes Krümmungsstück (9, 15, 33) enthält und die Mittel zum Realisieren einer Aufnahme des Krümmungsbegrenzers an dem Aufbau durch Eingriffsmittel gebildet sind, entsprechend den Formen und/oder den Festlegemitteln.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß
    die flexible Leitung einen Endansatz für ihre Verbindungsherstellung an dem Aufbau enthält und daß das Zugkabel (14) an dem Endansatz (8) festgelegt ist.
  3. Vorrichtung nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß
    die Mittel (13, 39) zum Festsetzen des Krümmungsbegrenzers an der flexiblen Leitung während der ersten Zugphase an der flexiblen Leitung axial festgelegt sind und nach dem Festlegen bezüglich dem Krümmungsbegrenzer freigesetzt werden.
  4. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet, daß
    die Mittel zum Festlegen und Freisetzen eine Einrichtung wie einen Ring (13) enthalten, der axial an der flexiblen Leitung hinter dem Krümmungsbegrenzer (6) festgesetzt ist, wobei der Krümmungsbegrenzer während der ersten Zugphase gegen den Ring abgestützt ist.
  5. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet, daß
    die Mittel (39) zum Festlegen und Freisetzen fest mit dem Krümmungsbegrenzer (16) während der ersten Zugphase verbunden sind und an demselben über eine Bruchzone (25) verbunden sind, welche einen vorbestimmten Wert darstellt, der den Widerstand des aufgebrachten Axialzugs beschränkt.
  6. Vorrichtung nach einem der Ansprüche 3 bis 5,
    dadurch gekennzeichnet, daß
    der Krümmungsbegrenzer an der flexiblen Leitung zum Erlauben einer Führung der flexiblen Leitung bezüglich der letzten montiert ist, nach dem Freisetzen der Mittel (13, 39) zum Festsetzen des Krümmungsbegrenzers.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, daß
    das konisch erweiterte Krümmungsstück (9) nach der Realisierung der Aufnahme separierbar ist.
  8. Vorrichtung nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, daß
    das konisch erweiterte Krümmungsstück (15, 33) fest mit der steifen, hohlen Einrichtung verbunden ist.
  9. Vorrichtung nach einem der Ansprüche 7 und 8,
    dadurch gekennzeichnet, daß
    die Aufnahme des Krümmungsbegrenzers durch einen entsprechenden Eingriff der Tragkörper (19, 47, 35; 20, 40) realisiert wird, im Hinblick auf die entsprechende Festlegung des Krümmungsbegrenzers und der steifen, hohlen Einrichtung.
  10. Vorrichtung nach Anspruch 9,
    dadurch gekennzeichnet, daß
    die Vorrichtung Klemmittel (26; 27, 28; 43, 41) enthält, zum gegenseitigen Halten derselben.
  11. Vorrichtung nach Anspruch 10,
    dadurch gekennzeichnet, daß
    die Vorrichtung Zurückhaltemittel (21, 24) enthält, zum Festlegen des Krümmungsbegrenzers (16) bezüglich der steifen, hohlen Einrichtung, vor dem Verwenden der Klemmittel (26, 27, 28).
  12. Vorrichtung nach einem der Ansprüche 9 bis 11,
    dadurch gekennzeichnet, daß
    die Träger (19, 47; 20) kegelstumpfartig ausgebildet sind und an dem Krümmungsbegrenzer und dem konisch erweiterten Krümmungsstück realisiert sind.
  13. Vorrichtung nach einem der Ansprüche 10 und 11,
    dadurch gekennzeichnet, daß
    die Tragekörper zylindrisch ausgebildet sind.
  14. Vorrichtung nach Anspruch 9,
    dadurch gekennzeichnet, daß
    die Tragekörper (35, 40) zylindrisch ausgebildet sind und ein Radialspiel aufweisen, welches eine Axialverschiebung zwischen denselben erlaubt.
EP93400912A 1992-04-07 1993-04-07 Vorrichtung zum Verlegen eines mit einem Krümmungsbegrenzer versehenen flexiblen Rohrstrangs Expired - Lifetime EP0565445B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9204229 1992-04-07
FR9204229A FR2689603B1 (fr) 1992-04-07 1992-04-07 Dispositif de montage d'une ligne flexible comportant un limiteur de courbure.

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EP0565445A1 EP0565445A1 (de) 1993-10-13
EP0565445B1 true EP0565445B1 (de) 1995-06-28

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FR2689603B1 (fr) 1994-05-20
AU667876B2 (en) 1996-04-18
JPH0674367A (ja) 1994-03-15
CA2093544C (fr) 2004-03-23
ES2050641T3 (es) 1995-11-01
OA10018A (fr) 1996-03-29
DE69300215D1 (de) 1995-08-03
FI931560A0 (fi) 1993-04-06
AU3569693A (en) 1993-10-14
KR930021911A (ko) 1993-11-23
BR9301461A (pt) 1993-10-13
NO931229D0 (no) 1993-03-31
EP0565445A1 (de) 1993-10-13
CA2093544A1 (fr) 1993-10-08
ES2050641T1 (es) 1994-06-01
NO304446B1 (no) 1998-12-14
US5437518A (en) 1995-08-01
FR2689603A1 (fr) 1993-10-08
DK0565445T3 (da) 1995-12-04
JP2620485B2 (ja) 1997-06-11
NO931229L (no) 1993-10-08
CN1030860C (zh) 1996-01-31
FI931560A (fi) 1993-10-08
CN1083193A (zh) 1994-03-02

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