EP0058159B1 - Dispositif de guidage d'un cordage - Google Patents

Dispositif de guidage d'un cordage Download PDF

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Publication number
EP0058159B1
EP0058159B1 EP81901390A EP81901390A EP0058159B1 EP 0058159 B1 EP0058159 B1 EP 0058159B1 EP 81901390 A EP81901390 A EP 81901390A EP 81901390 A EP81901390 A EP 81901390A EP 0058159 B1 EP0058159 B1 EP 0058159B1
Authority
EP
European Patent Office
Prior art keywords
rope
housing
plane
tower
guiding device
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
Application number
EP81901390A
Other languages
German (de)
English (en)
Other versions
EP0058159A1 (fr
EP0058159A4 (fr
Inventor
Donald Andrew Hayes
Lyle David Finn
Carl Rhys Brinkmann
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.)
ExxonMobil Upstream Research Co
Original Assignee
Exxon Production Research Co
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 Exxon Production Research Co filed Critical Exxon Production Research Co
Publication of EP0058159A1 publication Critical patent/EP0058159A1/fr
Publication of EP0058159A4 publication Critical patent/EP0058159A4/fr
Application granted granted Critical
Publication of EP0058159B1 publication Critical patent/EP0058159B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/04—Fastening or guiding equipment for chains, ropes, hawsers, or the like

Definitions

  • the present invention concerns rope guiding apparatus and, in particular though not exclusively, rope guiding apparatus which is applicable for guiding ropes used to anchor marine drilling and production structures.
  • guyed tower In the guying system for a guyed tower, guylines or ropes are run from the platform to anchor systems on the ocean floor. The guy ropes are secured at the platform deck by cable grips in a rope tensioning device and pass around deflecting devices or fairleads located below the water surface. The guy ropes then travel outwardly at an angle from the vertical to the anchoring system.
  • the direction of the anchoring systems to the deflecting device may not be known exactly and, further, may vary with time as the tower may rotate. Such deflecting must not damage the rope by excessive static or cyclic straining or by wearing and clearance requirements within the tower itself must be met.
  • a fairlead for use in tension leg marine platforms is disclosed in U.K. Patent 1,495,174 (Intercontinental Marine Development Ltd.) in which a cable is guided through a flared, horn- shaped inner guide member which is resiliently located within a surrounding outer, frusto- conical, support member, for accommodating changes in the direction of the cable.
  • a ship fairlead housing to comprise a sheave housing pivotally carried within a fixed, open-ended, surrounding housing, and a sheave wheel mounted in the sheave housing so that any changes in direction of a cable extending through the open end of the outer housing and over the sheave wheel are accommodated by pivoting of the sheave housing within the outer housing.
  • apparatus for guiding a rope comprising a rope guiding device having an outer housing, for installation offshore, and an inner housing, provided with a curved rope-contacting groove whose axis extends in one plane for bending said rope in said one plane, said inner housing being rotatable within said outer housing to rotate and change said one plane of said groove axis to another plane and deflect said rope from said one plane to said other plane, characterised in that the inner surface of said inner housing forms a three-sided pyramidal configuration, one of the corners defined by two sides of the pyramid forming the rope contacting-groove.
  • tower movement which may occur during storms may vary the direction of the guy ropes by several degrees.
  • congestion within the tower of structure, wells, and appertenances necessitates guiding the guy ropes through these structural elements from a first interior deflection to a second deflection at the perimeter of the tower structure.
  • Embodiments of the present invention can solve this problem in the following manner.
  • a first rope guiding device mounted in position within the tower bends the rope in a first plane to a predetermined degree.
  • a second rope guiding device also mounted in position on the periphery of the tower, bends the rope in the first plane, if necessary, and, also, deflects the rope in a direction out of the first plane.
  • the fixed relative positions of the first and second rope guiding devices maintains a position of the rope which avoids any obstacles within the tower and the second rope guiding device completes deflection of the rope beyond the tower.
  • the first rope guiding device is a shoe having a grooved, curved rope-contact surface and a sleeve.
  • the rope guiding device includes an outer fixed housing and an inner rotatable housing.
  • the inner housing contains the rope and is provided with a grooved rope-contact surface and other contact surfaces to accommodate for all rope directions and forces expected. Bearing means between the housings permit the inner housing to rotate, thus, increasing the size and variety of potential rope deflections.
  • the inner surface of the inner housing has a triangular pyramidal configuration having rounded corners in which one of the corners of the pyramid . forms the groove contact surface for the rope.
  • FIGS 1 and 2 illustrate an offshore drilling and producing platform 10 supported on a guyed tower 11 founded in the ocean floor 12 by piles (or a spud can or other type of foundation) indicated at 13.
  • a series of guylines or ropes 14 radiate outwardly from tower 11.
  • Each rope 14 is secured to the upper part of tower 11 at one end and to a suitable clump weight 15 and pile anchor or heavy drag anchor 16 on the ocean floor at the other end.
  • a more detailed description of the operation and functioning of marine structures of this type may be found in U.S. Patent No. 3,903,705 entitled "Apparatus for Anchoring Marine Structures" by R. W. Beck et a
  • Tower 11 is constructed of a network of tubular structural members, as indicated. Also, production pipes extend upwardly through the interior of the tower and, in addition, many other appertenances for support of those pipes and other required drilling and production equipment are located within the confines of the tower.
  • FIG. 3 there is illustrated a rope clamping and jacking (tensioning) device 20 supported on an interior portion of platform 10.
  • a rope guiding device in the form of a deflecting or bending member or shoe 21 is suitable secured to tower 11, as indicated at 18, vertically below tensioning device 20, as shown.
  • shoe 21 includes a retainer member 22 containing a grooved, curved rope-contact surface 23 and a surrounding U-shaped sleeve 24.
  • Sleeve 24 holds rope 14 in place preparatory to tensioning, may contain anti-corrosion and/or lubricating material, as indicated at 25, and, as noted above provides for attachment of shoe 21 to the tower.
  • a rope guiding device in the form of a deflecting or bending member 26 is fixed in a position located below shoe 21 on the periphery of tower 11 which is indicated by line 27. It is secured, as indicated at 28 in Figure 6, to peripheral support members 29 of tower 11. As seen also in Figure 5, rope 14 extends in a straight line between the aligned lower end of fixed shoe 21 and the upper end of fixed member 26. Rope 14 is bent by member 26, as indicated at 30 and 31. It is also deflectable out of the plane of the bend of member 21.
  • Line 32 designates the centre line of member 26 which is also the centre line of shoe 21.
  • Figure 8 illustrates a complete arrangement of the several radially extending ropes 14, clamping and jacking devices 20, shoes 21 and members 26.
  • Deflecting member 26 is illustrated in more detail in Figures 9, 10, 10A and 10B. It includes an outer (cone) housing 45, an inner (cone) housing 46, and bearings 47 between those housings.
  • Outer housing 45 attaches to the supporting structure as illustrated in Figure 6.
  • Inner housing 46 contains rope 14, which is shown positioned in a groove 48, and furnishes contact surfaces suitable for all rope directions and forces expected.
  • the groove 48 has substantially the same circumferential radius (i.e. as viewed normal to the axis of deflecting member 26) as rope 14. Bearings 47 transfer forces between housings 45 and 46 while permitting inner housing 46 to rotate, thereby increasing the size and variety of potential rope deflections.
  • FIG. 10 The moment arm is indicated by the arrowed line 55 in Figure 10.
  • Arrowed line 56 indicates a force which causes rotation of housing 46 to the right as shown in Figure 10A.
  • the configuration of the interior surfaces of housing 46 is also illustrated in Figures 11 through 17.
  • the straight side surfaces 52 and 54 and curved surface 53 and rounded corners 48, 56 and 57 form a three-sided pyramidal configuration.
  • Figure 17 shows the smallest end of the opening through housing 46 as being circular in shape it may be shaped as the opening is shown in Figure 16 or Figure 15. That end, in any event, is preferably larger than the size of rope 14 as shown in Figures 9 and 10.
  • Lines 60 and 61 illustrate lines of departure of a taut rope 14 from groove surface 48 resulting from two different tensions applied to rope 14.
  • Line 63 indicates rope 14 in slack position.
  • Seal rings 70 may be provided between the housings at each end thereof to seal in the bearings.
  • the exterior surface of housing 46 and the interior surface of housing 45 may themselves comprise bearing surfaces which would make separate bearings unncessary.
  • FIG. 18 The ability of the two-part rope guiding apparatus to deflect the rope 14 is illustrated in Figure 18.
  • Arrowed line 40 indicates the original rope direction
  • arrowed line 41 illustrates the orthogonal direction
  • numeral 42 designates the vertical plane of the shoe 21.
  • the angles alpha (a), beta ( ⁇ ) and gamma (y) refer to the bend of shoe 21, the bend of housing 46 in the plane of the shoe and rotation of housing 46 about its axis, respectively.
  • a bolt 71 threadable into housing 46 may be used to pin the two together.
  • a diver could release bolt 71 when the device is to be put into operation.
  • a remotely operated pinning device such as the piston-cylinder arrangement 72 controllable by a hydraulic line 73, may be used instead.
  • a shear pin could be used.
  • One manner of installing the rope guiding apparatus is to install shoes 21 and housing members 26 on the tower structure.
  • the ends of ropes 14 are attached to the anchoring system 15, 16.
  • Each rope 14 is then threaded through the housing member 26 and shoe 21 associated with it and connected at its upper end to cable grips connected into the tensioning device 20 on platform 10.
  • pinning means to pin outer housings 45 to inner housings 46 are used, the two housings are unpinned and ropes 14 made taut under catenary tension by tensioning devices 20. As the tension forces are applied when pulling in the ropes the moment arm will cause each inner housing 46 to rotate to compensate for any directional misalignment of the guyed members 21 and 26 with the anchor position.
  • the inner housing may be rotated manually to any desired position before, during or after initially tensioning the rope.
  • the geometry of the surface opposite groove 48 will depend upon the particular application of the device.
  • the configuration is chosen to support slack rope 14 preparatory to tensioning without damaging the rope. Consequently, while a preferred embodiment is illustrated with respect to guyed offshore drilling and production towers, the invention finds other applications, marine or land.
  • members 45 and 46 are shown conically shaped they may be formed cylindrically, rectangularly or in other shapes.
  • the axis of rotation of housing 46 need not necessarily be through the centre of the line of rope 14 extended between members 21 and 26. While the apparatus is shown and described as a two-piece rope guiding device, in some applications only one piece, the bending or deflecting member 26, may be used to compensate for any misalignment between two members connected together by a rope.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Gyroscopes (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Peptides Or Proteins (AREA)

Claims (9)

1. Appareil pour guider un cordage comprenant un dispositif (26) de guidage de cordage comportant un corps extérieur (45), destiné à une installation marine, et un corps intérieur (46) présentant une gorge incurvée (48) en contact avec le cordage, dont l'axe s'étend dans un premier plan afin de courber ledit cordage (14) dans ledit premier plan, ledit corps intérieur (46) pouvant tourner à l'intérieur dudit corps extérieur (45) afin de faire tourner et de modifier ledit premier plan dudit axe de la gorge pour l'amener dans un autre plan et dévier ledit cordage (14) dudit premier plan vers ledit autre plan, caractérisé en ce que la surface intérieure dudit corps intérieur (46) forme une configuration pyramidale à trois côtés, l'un des angles définis par deux côtés de la pyramide formant la gorge (48) en contact avec le cordage.
2. Appareil selon la revendication 1, caractérisé en ce que ladite gorge (48) en contact avec le cordage présente sensiblement le même rayon circonférentiel que ledit cordage (14).
3. Appareil selon la revendication 1 ou 2, caractérisé en ce que le troisième côté (53) de ladite pyramide, opposé à ladite gorge (48), est incurvé pour entrer en contact avec le cordage (14) lorsqu'il est détendu.
4. Appareil selon la revendication 1, 2 ou 3, dans lequel ledit dispositif (26) de guidage de cordage est installé sur une structure marine, caractérisé par un autre dispositif (21) de guidage de cordage destiné à être installé sur ladite structure marine, dans une position différente de celle du premier dispositif de guidage de cordage cité (26), capable de courber ledit cordage (14) pour le disposer dans ledit premier plan.
5. Appareil selon la revendication 4, caractérisé en ce que ledit autre dispositif (21) comprend un patin présentant une surface incurvée (23) à gorge en contact avec le cordage et un manchon incurvé (24) entourant ladite surface en contact avec le cordage.
6. Appareil selon la revendication 4 ou la revendication 5 et installé sur une structure marine, caractérisé en ce que des moyens (20) de tension de cordage sont agencés sur ladite structure marine, ledit autre dispositif (21) de guidage de cordage est fixé à ladite structure marine (10) en une position qui est située au-dessous de la surface de l'eau et à l'intérieur de ladite structure marine, verticalement au-dessous desdits moyens (20) de tension, lorsque la structure marine est dans son installation marine, et ledite premier dispositif de guidage de cordage cité (26) est placé au-dessous dudit autre dispositif de guidage de cordage (21) et sur la périphérie de ladite structure marine (10), ledit dispositif de tension (20) étant agencé pour appliquer une tension à une extrémité dudit cordage (14).
7. Appareil selon la revendication 6, caractérisé en ce qu'il comprend un système d'ancrage (16) auquel une extrémité dudit cordage (14) est attachée, l'autre extrémité dudit cordage étant attachée auxdits moyens (20) de tension du cordage et ledit cordage s'étendant desdits moyens de tension de cordage audit système d'ancrage (16) en passant par lesdits premier et second dispositifs de guidage de cordage cités (26, 21).
8. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits corps intérieur et extérieur (46, 45) sont de forme conique et comprennent des paliers (47) disposés entre lesdits corps intérieur et extérieur (46, 45) pour permettre audit corps intérieur (46) de tourner dans ledit corps extérieur (45).
9. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens (71) destinés à fixer de manière amovible lesdits corps intérieur et extérieur (46, 45) l'un à l'autre pour empêcher une rotation dudit corps (46) avant que l'appareil de guidage de cordage soit mis en service.
EP81901390A 1980-08-21 1980-08-21 Dispositif de guidage d'un cordage Expired EP0058159B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1980/001069 WO1982000675A1 (fr) 1980-08-21 1980-08-21 Dispositif de guidage d'un cordage

Publications (3)

Publication Number Publication Date
EP0058159A1 EP0058159A1 (fr) 1982-08-25
EP0058159A4 EP0058159A4 (fr) 1983-01-14
EP0058159B1 true EP0058159B1 (fr) 1985-03-20

Family

ID=22154495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81901390A Expired EP0058159B1 (fr) 1980-08-21 1980-08-21 Dispositif de guidage d'un cordage

Country Status (9)

Country Link
EP (1) EP0058159B1 (fr)
JP (1) JPS57501292A (fr)
BR (1) BR8009101A (fr)
CA (1) CA1162752A (fr)
ES (1) ES8307961A1 (fr)
IT (1) IT1171474B (fr)
MY (1) MY8600687A (fr)
NO (1) NO155059B (fr)
WO (1) WO1982000675A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH676973A5 (fr) * 1988-09-01 1991-03-28 Fischer Ag Georg
EP0888961A1 (fr) 1997-06-30 1999-01-07 Single Buoy Moorings Inc. Vaisseau comprenant un écubier pour une chaíne avec un élément de support pour ladite chaíne
PL183685B1 (pl) * 1997-07-11 2002-06-28 Przed Poszukiwan I Eksploatacj Platforma bezzałogowa i sposób jej posadowienia do wydobywania kopalin z dna morskiego

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB571328A (en) * 1943-12-22 1945-08-20 Knute Berger Fairlead housings of ships
GB1495174A (en) * 1976-04-13 1977-12-14 Laird Group Ltd Fairleads

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA689872A (en) * 1964-06-30 Howard L. Shatto, Jr. Apparatus for anchoring underwater vessels
US2986889A (en) * 1958-06-25 1961-06-06 California Research Corp Anchoring systems
US3552343A (en) * 1969-01-10 1971-01-05 Pan American Petroleum Corp Drilling ship mooring system
US3903705A (en) * 1974-01-24 1975-09-09 Exxon Production Research Co Apparatus for anchoring marine structures
NO145686L (fr) * 1974-06-03
US4037424A (en) * 1975-10-03 1977-07-26 Anders Edward O Offshore drilling structure
JPS5277401A (en) * 1975-12-19 1977-06-29 Karlskronavarvet Ab Floating platform capable of being anchored
US4020779A (en) * 1976-05-19 1977-05-03 Skagit Corporation Chain/wire rope connector assembly for anchor
US4170186A (en) * 1976-06-21 1979-10-09 J. Ray Mcdermott & Co., Inc. Anchored offshore structure with sway control apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB571328A (en) * 1943-12-22 1945-08-20 Knute Berger Fairlead housings of ships
GB1495174A (en) * 1976-04-13 1977-12-14 Laird Group Ltd Fairleads

Also Published As

Publication number Publication date
IT1171474B (it) 1987-06-10
CA1162752A (fr) 1984-02-28
ES504851A0 (es) 1983-07-01
IT8149132A0 (it) 1981-08-20
EP0058159A1 (fr) 1982-08-25
NO155059B (no) 1986-10-27
MY8600687A (en) 1986-12-31
JPS57501292A (fr) 1982-07-22
BR8009101A (pt) 1982-06-22
NO821203L (no) 1982-04-13
EP0058159A4 (fr) 1983-01-14
WO1982000675A1 (fr) 1982-03-04
ES8307961A1 (es) 1983-07-01

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