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WO2012001393A1 - Collier oscillant et ensemble terminaison d'ombilical - Google Patents

Collier oscillant et ensemble terminaison d'ombilical Download PDF

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Publication number
WO2012001393A1
WO2012001393A1 PCT/GB2011/051187 GB2011051187W WO2012001393A1 WO 2012001393 A1 WO2012001393 A1 WO 2012001393A1 GB 2011051187 W GB2011051187 W GB 2011051187W WO 2012001393 A1 WO2012001393 A1 WO 2012001393A1
Authority
WO
WIPO (PCT)
Prior art keywords
collar
umbilical
bulkhead plate
termination assembly
curved surface
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.)
Ceased
Application number
PCT/GB2011/051187
Other languages
English (en)
Inventor
Anthony Hanson
Daniel Grayson
Christopher Jameson
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 Energies France SAS
Original Assignee
Technip France SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Technip France SAS filed Critical Technip France SAS
Publication of WO2012001393A1 publication Critical patent/WO2012001393A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/22—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals
    • 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
    • E21B17/02—Couplings; joints
    • 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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/05—Swivel joints
    • 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
    • E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
    • E21B17/206—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables with conductors, e.g. electrical, optical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/26—Repairing or joining pipes on or under water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
    • F16L13/10—Adhesive or cemented joints
    • F16L13/11—Adhesive or cemented joints using materials which fill the space between parts of a joint before hardening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F16L39/04—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies allowing adjustment or movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
    • F16L9/19—Multi-channel pipes or pipe assemblies
    • F16L9/20—Pipe assemblies

Definitions

  • an umbilical especially for subsea use, comprises a group of one or more types of elongate active umbilical elements, such as electrical cables, optical fibre cables and fluid conveying conduits, cabled together for flexibility and over-sheathed and/or armoured for mechanical strength.
  • Umbilicals are typically used for transmitting power, signals and fluids (for example for fluid injection, hydraulic power, gas release, etc.), especially to and from a subsea installation.
  • the main fluid conduits used for manufacturing umbilical are thermoplastic hoses and steel tubes.
  • a steel tube umbilical is defined as an umbilical wherein all or most of the umbilical elements which compose the umbilical are steel tubes.
  • the steel tubes and the other elongate umbilical elements that make up the umbilical are grouped together and wound in a helical pattern. Examples of steel tube umbilicals are disclosed in US6472614, W093/17176 and GB2316990.
  • Steel tubes are not permeable to gases. They are also able to resist installation and in-service axial loads, and high external collapse pressures. Thus, such an umbilical, with judicious design, is better able to withstand axial loads without requiring the addition of tensile armour layers.
  • US6102077 discloses an elongate subsea structure combining the functions of a flexible pipe and a general utility umbilical as described above; such structures are also generally defined herein as an umbilical.
  • This structure comprises a large diameter central flexible pipe used as a production line for conveying oil or gas, and a plurality of small diameter peripheral pipes arrayed in helical or S/Z manner around the central flexible pipe, said peripheral pipes being used as service or control lines for fluid injection, gas lift injection, hydraulic power or gas release.
  • Such structures are known under the names ISU ® "Integrated Subsea
  • the central flexible pipe generally complies with the standard API 17J "Specification for Unbonded Flexible Pipe", second edition, November 1999.
  • the small diameter peripheral pipes of ISU ® and IPB are generally steel tubes.
  • the invention aims at solving the problem of better securing at least some of the umbilical elements, especially the load bearing elements, at at least one of the umbilical terminations as part of the umbilical termination assembly.
  • FIG. 1 A known method of umbilical termination is illustrated in the accompanying Figure 1.
  • the method comprises welding the steel tubes 2a, 2b (or steel rods) forming part of the umbilical 1 directly to a steel bulkhead plate 3 having through holes 8a, 8b through which the steel tubes 2a, b pass, and which is mechanically attached to the overall termination 4.
  • Figure 1 shows welds 6a, 6b.
  • the interior cavity of the termination 4 is filled with a compression resistant resin 5, gravity poured, through a filler hole situated at the top of the termination 4.
  • the steel tubes 2a 2b are directly welded to the bulkhead plate 3.
  • the load transfer from the umbilical 1 (the 'pull out load F' due to the suspended weight of the riser umbilical) to the bulkhead plate 3 (which is usually attached onto a floating production unit) is made mainly via the steel tubes 2a 2b and the welds 6a 6b.
  • the function of the resin 5 is to prevent the radial movements of the tubes inside the termination.
  • the resin 5 is not able to prevent the tubes 2a, b from sliding and being pulled out, so that the function of the welds 6a 6b is to transfer most of the pulling load from the steel tubes 2a 2b to the bulkhead plate 3.
  • the welds 6a, b are very critical for the reliability and the safety of the termination 4.
  • it is difficult to achieve good quality welds when the tube axis is not perfectly perpendicular to the bulkhead plate 3.
  • the tube 2b is aligned, but the tube 2a is in misalignment.
  • tube misalignments cannot be avoided, and the tubes cannot easily be
  • An umbilical may comprise a very large number of tubes or rods, some of them being very stiff. As these tubes are usually also helically (or in S-Z) wound, they would all have to be perfectly straightened up in the termination to correct the misalignments, which would be very difficult and time consuming.
  • Tube misalignments present at least two main drawbacks to the welding process. Firstly, because of the misalignment, each relevant through hole 8a has to be machined with a significantly larger diameter than the outer diameter of its tube (2a), but this leads to an increasing, and increasingly undesired, gap thereinbetween, in particular a significant gap which affects the quality of the subsequent weld 6a and its load transfer reliability.
  • misalignments are not compatible with the use of automatic welding processes such as orbital welding.
  • Automatic welding machines are clamped onto the tube and their welding head is guided in rotation around the tube axis. Therefore, if the tube axis is not perpendicular to the bulkhead plate plane, the welding head will not follow the intersection of the tube and the plane. This leads to an uneven weld of lower quality and lower reliability.
  • any even slight misalignment of the tubes 2a, b and the bulkhead plate 3 leads to unbalanced loading or load transfer thereinbetween, and thus potential weak spots or areas in the welding therebetween. This is especially when the load-bearing nature of some of the steel tubes is very high. Trying to align a heavy bulkhead plate simultaneously against 20-30 tubes is a demanding and difficult task, generally requiring significant manual input, especially to weld all the separate tubes perfectly whilst maintaining best alignment thereinbetween.
  • One object of the present invention is to improve the load transfer between an umbilical and a bulkhead plate without removing the misalignments between tubes and the bulkhead plate.
  • a rocking collar for an umbilical termination assembly comprising a plurality of the umbilical elements extending from an umbilical and passing through a bulkhead plate, the collar comprising at least a curved surface and a spaced face, and wherein the collar is able to fit around an umbilical element to align the longitudinal axis of the umbilical element with a plane of the spaced face for subsequent conjoining, and wherein the curved surface is able to abut the bulkhead plate. This allows alignment of the longitudinal axis of the umbilical element with the conjoining surface.
  • the present invention accepts the existence of umbilical element misalignments but provides a simple way of improving the conjoining and thus the quality of the load transfer between such umbilical elements and the bulkhead plate using rocking collars to provide more aligned conjoining surfaces.
  • an axis and a surface are said to be aligned when the axis is parallel to the surface normal at the crossing point between the axis and the surface.
  • the axis and the plane are said to be aligned when they are perpendicular.
  • the umbilical having the termination assembly or assemblies has a number of elongate umbilical elements, optionally one or more being steel tubes.
  • a common umbilical for use in sub-sea situations involves a number of steel tubes, one or more of which is also load-bearing and intended to assist with the actual load-bearing of the umbilical between its terminations.
  • umbilicals are >500m in length, and possibly >1000m, >2000m or even >3000m in length, the skilled man is aware of the increasingly significant axial loading on the umbilical, and thus the need for ensuring best possible transfer of such loading at the umbilical terminations, generally through each termination assembly.
  • umbilical elements include one or more of the group comprising: steel rods, steel ropes, high strength cables, composite rods, composites ropes, composite tubes and reinforced hoses; any
  • One, some or all of the umbilical elements may extend directly from the umbilical and through the bulkhead plate.
  • One, some or all of the umbilical elements may be extended from the umbilical to pass through the bulkhead plate.
  • Such extension(s) may be by the addition of one or more end pieces, generally having the same inner and/or outer diameter, and optionally adapted to assist the conjoining of the umbilical element with a rocking collar as part of the present invention, and/or to assist load transfer between the umbilical element and the bulkhead plate.
  • Such end pieces, extensions of sleeves may be adapted by the addition of one or more threaded portions for conjoining with threaded nuts and the like.
  • the bulkhead plate is commonly a single machined plate intended to provide mechanical attachment of at least some of the elongate umbilical elements in the umbilical to the termination assembly, typically at least the load-bearing umbilical elements.
  • the bulkhead plate is wholly or substantially steel.
  • a rocking collar of the present invention may comprise any suitable shape, design, size or configuration, and be formed of any suitable material or combination of materials.
  • One suitable material is steel.
  • the rocking collar is formed from the same, a correspondingly similar, or an otherwise compatible, material to that of the bulkhead plate and/or at least a number of the umbilical elements.
  • An umbilical termination assembly may comprise a number of rocking collars which may be the same of different. Different rocking collars may be adapted to suit different umbilical elements.
  • a rocking collar may comprise two or more portions intended to be conjoined in use, and able to fit around an umbilical element by any suitable configuration.
  • the rocking collar is, or is formed as, an integral piece and unit.
  • a rocking collar may comprise at least one aperture extending from the curved surface to the spaced face, which aperture corresponds to the outer diameter of a relevant umbilical element, with a tolerance
  • an umbilical element generally extends a short distance beyond the bulkhead plate during assembly.
  • the curved surface of the rocking collar has a semi-circular extent to provide a semi-circular surface.
  • the semi-circular extent may extend partially or fully around one side of the collar.
  • the spaced face is wholly or substantially flat.
  • the rocking collar has a raised collar portion extending from the spaced face around the umbilical element location, generally the aperture through the collar therefor.
  • a rocking collar may comprise one or more sides or other faces or face portions between the curved surface and the spaced face. Preferably, the curved surface meets the spaced face.
  • the rocking collar is a semi-circular cylinder, generally comprising a curved surface, a wholly or substantially flat or planer spaced face, and two end faces, with a perpendicular umbilical element aperture.
  • a rocking collar may include one or more further portions or parts, such as a medium port for the provision of a fluid such as an anticorrosion medium into the rocking collar in use.
  • the rocking collar is able to allow 90° or perpendicular alignment of the longitudinal axis of the umbilical element with its spaced face, so as to provide an even load-bearing arrangement therebetween once conjoined. Such alignment may not be exactly 90°, and the skilled man is aware of the angle being able to be wholly or substantially 90°.
  • the rocking collar is rotatable, preferably freely rotatable, about the umbilical element to achieve maximum contact of the collar with the bulkhead plate.
  • the collar could be slid along the umbilical element until its curved surface is in contact with the bulkhead plate, followed by rotating the collar around the element axis while maintaining the contact until a stable and optimized position has been found.
  • the umbilical element and spaced face are subsequently conjoined by a conjoiner.
  • the conjoiner is preferably one or more of the group comprising: welds and nuts, as well as bonds or bonding, crimps or crimping and other mechanical locking means.
  • a rocking collar of the present invention is for use on the end or ends of umbilical elements beyond the bulkhead plate, that is on the far or distal side of the bulkhead plate from the umbilical, typically being one 'side' of an umbilical termination assembly.
  • rocking collars of the present invention may also be for use in a similar manner on the end or ends of umbilical element(s) prior to passing through the bulkhead plate, that is on the near or nearest side of the bulkhead plate from the umbilical.
  • Such rocking collar(s) can provide a similar function of improving the quality of the load transfer between such umbilical elements and the bulkhead plate (through more aligned conjoining surfaces) prior to and/or during the setting and/or hardening of any filler in the terminal assembly such as epoxy filling that can be used to 'fix' the internal arrangement within the terminal assembly, and/or during the conjoining of one or more rocking collars on the far side of the bulkhead plate as described hereinabove.
  • the present invention therefore includes a rocking collar as defined hereinabove wherein the termination assembly comprises at least one misaligned umbilical element with the bulkhead plate.
  • umbilical termination assembly comprising a plurality of the umbilical elements extending from an umbilical and passing through a bulkhead plate, and at least one, preferably a plurality of, rocking collars as defined hereinabove, wherein each collar fits around an umbilical element beyond the bullhead plate to align the longitudinal axis of the umbilical element with a plane of the spaced face of the collar for subsequent conjoining, and wherein the curved surface of the or each collar abuts the bulkhead plate.
  • the termination assembly is such that each said collar is fitted around an umbilical element and is subsequently welded there to at its spaced face.
  • the termination assembly is such that each said collar fitted around an umbilical element is further welded at its curved surface to the bulkhead plate.
  • the termination assembly is such that each said collar is fitted around an umbilical element and is subsequently conjoined to each said umbilical element at its spaced face using one or more nuts.
  • the termination assembly further comprises one or more said collars to fit around an umbilical element prior to the bulkhead plate to align the longitudinal axis of the umbilical element with a plane of the spaced face of the collar for subsequent conjoining, and wherein the curved surface of the or each collar abuts the bulkhead plate.
  • the termination assembly as defined herein may include wherein at least one of the umbilical elements is misaligned with the bulkhead plate.
  • a method of forming an umbilical termination assembly comprising a plurality of umbilical elements extending from an umbilical and a bulkhead plate, comprising at least the steps of:
  • the conjoining may comprise welding, using nuts, bonds, crimps, or a combination of same.
  • the aligning of the umbilical element axis with the spaced face is perpendicular or at 90°.
  • the or each method further comprises the step of:
  • the present invention can also allow automatic welding of the collar to the elongate elements, bulkhead plate, or both. That is, with the assurity of the alignment between the umbilical element axis and at least the spaced face of the collar, automatic welding such as that provided by known welding machines, can continue the assembly of the termination assembly, rather than requiring constant and vigilant manual attention by one or more persons skilled in the art to look at the umbilical element and bulkhead plate alignment during each welding process.
  • the or each method comprises automatic welding of the collar to the umbilical elements, to the bulkhead plate, or both.
  • Fig. 1 is a longitudinal sectional view through a prior art umbilical termination assembly
  • Fig. 2 is a perspective view through a rocking collar according to one embodiment of the present invention
  • Fig. 3 is a schematic longitudinal sectional view of a rocking collar, tube and bulkhead plate of a first umbilical termination assembly according to the present invention
  • Figures 4a and 4b are side cross-sectional and front views respectively of area A in Figure 3;
  • Fig. 5 is a perspective view of the rocking collar in situ according to a further embodiment of the invention.
  • Fig. 6 is a perspective view of an umbilical termination assembly according to a further embodiment of the present invention.
  • Figure 7 is a schematic longitudinal sectional view of a rocking collar, tube and bulkhead plate of a second umbilical termination assembly according to the present invention.
  • Figure 1 shows a prior art umbilical termination comprising a plurality, the two steel tubes 2a, 2b being two examples only, extending from an umbilical 1 and passing through two through holes 8a,8b in a steel bulkhead plate 3.
  • FIG 2 shows a rocking collar 10 according to one embodiment of the present invention, for an umbilical termination assembly such as that shown in Figure 1.
  • the collar 10 comprises a curved surface 12 and a spaced face being a weld face 14 for the use of the collar 10 shown in Figure 3.
  • the curved surface 12 has a semi-circular extent and meets the weld face 14 along edges 15.
  • the weld face 14 is generally flat, such that the general nature of the curved surface 12 and the weld face 14 is to make the collar a semicircular cylinder.
  • the collar 10 has a first aperture 18 extending from the curved surface 12 to the weld face 14, which aperture 18 corresponds to the outer diameter of a relevant umbilical element such as a steel tube 2 shown in Figure 1 . There is a tolerance between the aperture 8 and the outer diameter of a relevant umbilical element to allow the provision or journaling of the collar 10 along the umbilical element.
  • the collar 10 further includes a raised collar portion 20 extending from the weld face 14 around the umbilical element location being the aperture 18. The raised collar portion 20 assists the welding of the collar 10 to an umbilical element.
  • Figure 2 also shows the collar 10 having a medium port 21 for the provision of a fluid into the collar 10, such as an anticorrosion medium that can be injected into (and maintained in) the collar 10 in use.
  • Figure 3 shows in a simplified and schematic view an arrangement of the rocking collar 10 in use around two umbilical elements such as upper and lower steel tubes 2a, 2b and against a bulkhead plate 3 as shown in Figure 1 to provide a first termination assembly 4a according to the present invention.
  • the rocking collars 10 are useable even where an umbilical element is not misaligned with the bulkhead plate 3.
  • Figure 1 shows that although the lower tube 2b is not misaligned through through hole 8b, a rocking collar 10 is still useable, and may assist in an automatic welding process where a number of collars 10 are used elsewhere around the bulkhead plate 3.
  • FIG. 3 shows the rocking collar 0 of the present invention being able to fit around the upper steel tube 2a, with its curved surface 14 able to abut the bulkhead plate 3.
  • a positioning weld 22 can optionally be provided between the collar 10 and the bulkhead plate 3 to maintain the collar 10 in its optimized position until a retention weld 24 between the weld surface 4 and the upper tube 2a has been completed.
  • the retention weld 24 can now be easily carried out with an automatic orbital welding machine because the plane of the weld face 14 is by construction correctly perpendicular to the upper tube axis Z. Moreover, the gap between the upper tube 2a and the rocking collar 10 is much reduced compared to the enlarged through hole 8a required to allow passage of the misaligned upper tube 2a through the bulkhead plate 3 at an angle.
  • the aperture 18 machined in the rocking collar 10 is preferably a cylindrical hole whose axis is correctly perpendicular to the plane of the weld face 14, and the internal diameter of which fits the outer diameter of the upper tube 2a with good tolerance. This also avoids or minimizes any bending stresses that may otherwise occur between the misaligned upper tube 2a and the bulkhead plate 3.
  • Figures 4a and 4b show in greater detail how it is also preferred to maximize contact or contact surface 28 between the curved surface 12 of the rocking collar 10 and the plane surface 9 of the bulkhead plate 3.
  • the surface 12 is curved in order to achieve a good contact surface.
  • the best mode to achieve this contact/abutment with the bulkhead plate 3 is to use a cylindrical curved surface 12.
  • the axis of this cylindrical surface (X) is perpendicular to axis of the aperture 18 (Z) (and therefore also to the axis of the tube 2).
  • the diameter of the cylindrical surface 12 of the rocking collar 10 is preferably larger than the outer diameter of the tube 2a.
  • the curved surface is spherical, the centre of the sphere being on the axis on the aperture 8, and the diameter of the sphere being larger than the outer diameter of the tube.
  • the collar 10 is rotated around the upper tube 2a (or the aperture 18) while maintaining the contact with the bulkhead plate 3, until a stable and optimized position has been found thereinbetween.
  • Figure 5 shows a perspective view of the rocking collar 10 in-situ and welded by a first (positioning) weld 22 to the bulkhead plate 3, and by a second (retaining) weld 24 to an umbilical element such as upper steel tube 2a.
  • FIG 6 shows a perspective view of an umbilical termination assembly according to another embodiment of the present invention, comprising a plurality of umbilical elements 30 extending from an umbilical (not shown) and passing through a bulkhead plate 32, and a plurality of rocking collars 34 such as that shown in Figure 2.
  • Each collar 34 is fitted around an umbilical element 30, and has the correct alignment of the longitudinal axis of the umbilical element 30 with the weld face of the collar 34 prior to welding thereinbetween.
  • Figure 7 shows in a simplified and schematic view an arrangement of rocking collars 30 similar to the rocking collar shown in Figure 2 in use around two umbilical elements such as upper and lower steel tubes 32a, 32b and against a bulkhead plate 3 as shown in Figure 1 to provide a second termination assembly 4b according to the present invention.
  • FIG. 7 shows that although the upper tube 32a is not misaligned through hole 38a, a rocking collar 30a is still useable, and may assist in an automatic welding process where a number of collars 30b are used elsewhere around the bulkhead plate 3.
  • Figure 7 shows one rocking collar 30b of the present invention being able to fit around the lower steel tube 32b, with its curved surface 12 able to abut the bulkhead plate 3.
  • the longitudinal axis (Z) of the umbilical element with the spaced face 14.
  • one or more nuts 40 can optionally be provided against the collar 30b to maintain it in its optimized position against the bulkhead plate 3 and to transfer tensile load therebetween through the flat surfaces of the nuts and the planer surface of the spaced face 14 of the rocking collar 30b.
  • this also avoids or minimizes any bending stresses that may otherwise occur between the misaligned tube 32b and the bulkhead plate 3.
  • Figure 7 also shows the addition of a threaded sleeve 42 to the end of each of the upper and lower tubes 32a, 32b (through welds 44) to allow retention of the tubes 32a, 32b with the nuts 40.
  • Figure 7 also shows the application of a rocking collar 30c around the lower tube 32b on the near side of the bulkhead plate 3, and its fixing to the sleeve 42 via another nut 40, prior to conjoining the rocking collar 30b on the far side of the bulkhead plate 3 as described hereinabove.
  • the bulkhead plate 3 is strongly tightened between both collars 30b, 30c which maintains the alignment of the lower tube 32b with the bulkhead plate 3 during the setting and hardening of the epoxy resin 35 filler in the terminal assembly 4b.
  • the present invention provides elements and a system which provides better assurance of the load transfer between one or more misaligned umbilical elements in an umbilical, in particular those umbilical elements intended to be load bearing, and the termination assembly, in particular the bulkhead plate. With better or more assured load transfer ability, less reliance may be required to be placed on any other load transfer medium, means or assembly in the termination assembly, such as the resin or other filler material provided in the general cavity of the termination assembly. Further benefits and advantages of the present invention are described herein.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Harvester Elements (AREA)
  • Supports For Pipes And Cables (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

L'invention porte sur un collier oscillant (10) pour un ensemble terminaison d'ombilical, ledit ensemble terminaison comprenant une pluralité d'éléments ombilicaux (2a, 2b) s'étendant à partir d'un ombilical (1) et passant à travers une plaque de cloison (3), le collier (10) comprenant au moins une surface incurvée (12) et une face espacée, et le collier (10) étant apte à s'emboîter autour d'un élément ombilical (2a, 2b) pour aligner l'axe longitudinal de l'élément ombilical avec un plan de la face espacée (14) pour une liaison ultérieure, et la surface incurvée (12) étant apte à venir en butée contre la plaque de cloison. De cette manière, la présente invention accepte l'existence de désalignements d'élément ombilical, mais fournit une manière simple d'améliorer la liaison et ainsi la qualité du transfert de charge entre de tels éléments ombilicaux et la plaque de cloison à l'aide de colliers oscillants pour fournir des surfaces reliées plus alignées.
PCT/GB2011/051187 2010-06-28 2011-06-24 Collier oscillant et ensemble terminaison d'ombilical Ceased WO2012001393A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1010798.5A GB2482472B (en) 2010-06-28 2010-06-28 Rocking collar and umbilical termination assembly
GB1010798.5 2010-06-28

Publications (1)

Publication Number Publication Date
WO2012001393A1 true WO2012001393A1 (fr) 2012-01-05

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PCT/GB2011/051187 Ceased WO2012001393A1 (fr) 2010-06-28 2011-06-24 Collier oscillant et ensemble terminaison d'ombilical

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WO2024134268A1 (fr) * 2022-12-23 2024-06-27 Technipfmc Subsea France Ensemble de terminaison sous-marin pour ombilical

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GB823188A (en) * 1957-11-29 1959-11-04 Frederick William Rohe Floating nut assembly
FR2638796A1 (fr) * 1989-03-29 1990-05-11 Shur Lok International Sa Dispositif d'assemblage a ecrou-barillet flottant
WO1993017176A1 (fr) 1992-02-21 1993-09-02 Kvaerner Energy A.S Procede et appareil de fabrication et de pose d'un cable ombilical
US6102077A (en) 1995-11-24 2000-08-15 Coflexip Multiple-tube flexible pipe having high compressive strength
GB2316990A (en) 1996-09-05 1998-03-11 Alsthom Cge Alcatel Subsea line with corrosion prevention
WO2001002693A1 (fr) * 1999-07-01 2001-01-11 Kellogg Brown & Root, Inc. Ombilical de pompage pneumatique et ensemble de terminaisons associees
US6472614B1 (en) 2000-01-07 2002-10-29 Coflexip Dynamic umbilicals with internal steel rods
WO2005124213A1 (fr) 2004-06-18 2005-12-29 Aker Kvaerner Subsea As Cable d'alimentation electrique comprenant des elements porteurs de charges separes d'un materiau composite
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"Specification for Unbonded Flexible Pipe", November 1999, API

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Publication number Priority date Publication date Assignee Title
WO2024134268A1 (fr) * 2022-12-23 2024-06-27 Technipfmc Subsea France Ensemble de terminaison sous-marin pour ombilical
GB2625983A (en) * 2022-12-23 2024-07-10 Technipfmc Subsea France Subsea termination assembly for umbilical

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GB201010798D0 (en) 2010-08-11
GB2482472A (en) 2012-02-08

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