EP1266118B1 - Dispositif de contrainte de tube ascenseur compense en pilonnement - Google Patents

Dispositif de contrainte de tube ascenseur compense en pilonnement Download PDF

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Publication number
EP1266118B1
EP1266118B1 EP00911499A EP00911499A EP1266118B1 EP 1266118 B1 EP1266118 B1 EP 1266118B1 EP 00911499 A EP00911499 A EP 00911499A EP 00911499 A EP00911499 A EP 00911499A EP 1266118 B1 EP1266118 B1 EP 1266118B1
Authority
EP
European Patent Office
Prior art keywords
riser
telescopic
pipe
telescopic pipe
arrangement
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
EP00911499A
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German (de)
English (en)
Other versions
EP1266118A1 (fr
Inventor
Jon Grude Gjedebo
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.)
National Oilwell Varco Norway AS
Original Assignee
National Oilwell Norway AS
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Filing date
Publication date
Application filed by National Oilwell Norway AS filed Critical National Oilwell Norway AS
Publication of EP1266118A1 publication Critical patent/EP1266118A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
    • E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform
    • E21B19/006—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform including heave compensators

Definitions

  • the present invention regards a tensioning and heave compensating arrangement at a riser that extends between an item of subsea equipment and a surface vessel, in which the riser forms part of a telescopic pipe arrangement.
  • Risers of this type have their lower end attached to subsea equipment such as blowout preventer valves, wellheads or similar, and the top attached to a surface vessel, such as a drillahip or a platform.
  • the riser In order to absorb the vertical heaving motion of the vessel caused by the motion of the sea, it is previously known to provide the upper end section of the riser with a piece of piping that is arranged so as to slide telescopically in the riser. I.e., the riser has a telescopic pipe section at the top.
  • the riser must be kept under continuous tension, and in the case of known risers this is achieved by means of a steel wire that is attached to the riser and kept taut by means of winches or hydraulic/pnematic cylinders that have been assigned pressure sources and accumulators located on board the surface vessel.
  • winches or hydraulic/pnematic cylinders that have been assigned pressure sources and accumulators located on board the surface vessel.
  • the direct use of hydraulic/pneumatic cylinders, i.e. without a steel wire, is also known.
  • the winches must be sized to taka up the weight of the riser and any fluid present in this.
  • the winches must be controllable, so called heave compensatable (vertical motion compensatable), so an to minimise the transfer of heaving movements from the surface vessel to the riser.
  • US Patent Specification 3211224 describes a riser telescopic section located at the lower end of the riser and in which the drilling mud is made available to a piston-cylinder arrangement within the telescopic section, such that a downward force is applied to the piston, which force is directly proportional to the differential weight of the mud inside the riser and the water outside. It is indicated that the apparatus is suitable for operations in water of depth between 30.5 m (100) and 457.2 m (1500 ft). Apparatus according to the present invention is not limited in use to the drilling phase of operations over water.
  • the object of the invention has been to provide a tensioning and heave compensating arrangement at a riser, which arrangement does not require the use of winches in order to keep the riser tensioned or to achieve heave compensation.
  • risers of the relevant type are, as mentioned, provided with a telescopic section at the top.
  • a telescopic section is present at the lower end of a riser that is designed and arranged in accordance with the invention.
  • the lower part of the riser according to the invention forms part of a telescopic pipe arrangement in the area of the subsea equipment as an inner, telescopically movable pipe.
  • a riser according to the invention is at the top secured to the surface vessel in a known manner, and follows the movements of the vessel caused by the motion of the sea, while the mass of the riser ensures that the riser is kept under tension.
  • the telescopic section of the riser may be realised with or without pretensioning that contributes towards increasing the tension in the riser.
  • Figure 1 shows a schematic diagram of a riser 10 extending between a surface vessel 12, such as a drillship, and an item of subsea equipment 14, such as a blowout preventer valve on the seabed 16.
  • a surface vessel 12 such as a drillship
  • subsea equipment 14 such as a blowout preventer valve
  • a lower telescopic riser section in the form of a telescopic pipe arrangement is generally denoted by reference number 18.
  • the surface of the sea is indicated by 20.
  • Figure 2 shows a first embodiment of the invention, in which an internal annular packing 24 that has been arranged so as to provide a sliding seal between the inside of the outer telescopic pipe 22 and the outside of the riser 10, is disposed at the top of the outer telescopic pipe 22, the outer telescopic pipe 22 in the telescopic pipe arrangement 10, 22 being sufficiently dimensioned for extension in the vertical direction to accommodate the maximum vertical movements anticipated from such a surface vessel.
  • Figure 3 shows a second embodiment of the invention, in which the telescopic pipe arrangement 18 at the lower end of the riser 10 is spring-pretensioned.
  • Reference number 26 indicates a helical line-shaped compression spring, the upper end of which abuts the lower surface of an upper, inwardly directed ring flange 22' of the outer telescopic pipe 22, and the lower end of which abuts the upper surface of a shoulder 30 on the lower end of the riser 10.
  • An annular packing 28 provides a sliding seal against the riser 10.
  • FIG. 4 An alternative embodiment shown in Figure 4 represents a third embodiment of the invention.
  • both the inner and the outer diameters of an upper axial pipe section 22a are larger than those of a lower axial pipe section 22b.
  • the pipe section 22a forms a cylinder for a piston 32 with a peripheral packing 34 that provides a sliding seal against the inside of the cylinder 22a.
  • a circumferential packing 36 that provides a sliding seal against the lower end portion of the riser 10 is disposed internally at the transition between the two axial pipe sections 22a and 22b.
  • a cylindrical chamber 38 is formed between the lower surface of the piston 32 and the upper surface of the packing 36 and of an adjacent, inwardly oriented annular part 40 at the above mentioned transition.
  • the upper surface of the piston 32 is exposed to the pressure in the surrounding water, while the underside of the piston 32 is exposed to the pressure in the cylindrical chamber 38.
  • a radially oriented vacuum pipe 42 in communication with the lower end of the cylindrical chamber 38 is connected to a set of pumps (not shown) arranged so as to be able to evacuate the cylindrical chamber 38.
  • telescopic pipe arrangement 18 may also be pretensioned by other means than those shown and described, for example by means of hydraulic pressure accumulators and subsea winches. It is also easy to appreciate that it will be possible to implement this pretensioning by using various combinations of pretensioning means.

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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)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Paper (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Continuous Casting (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Ship Loading And Unloading (AREA)

Claims (3)

  1. Agencement de tube ascenseur pour une compensation de pilonnement et un tensionnement et une extension de tube ascenseur entre un élément d'équipement sous-marin (14) et un navire de surface (12), par exemple un navire de forage, le tube ascenseur comprenant une tige montante (10), dont une partie d'extrémité inférieure est enfermée au moins partiellement dans la direction longitudinale dans un tuyau télescopique (22, 22a, 22b) en relation télescopique avec celui ci afin de former une section de tube ascenseur télescopique (18), l'extrémité inférieure dudit tuyau (22, 22a, 22b) étant reliée audit équipement sous-marin (14), la section de tube ascenseur télescopique (18) étant disposée pour effectuer la compensation de pilonnement alors que le tensionnement du tube ascenseur (10) est réalisé par le biais de son propre poids ou combiné avec des moyens de pré-tensionnement reliés à la section de tube ascenseur télescopique (18) au niveau de l'extrémité inférieure de la tige montante (10), la tige montante (10) supportant une bride annulaire transverse en forme de disque (30, 32) à l'intérieur de la section de tube ascenseur télescopique (18), caractérisé en ce que la surface supérieure de la bride (30, 32) est adaptée pour être sous pression dans l'objet d'un pré-tensionnement, hydrauliquement au moyen de pression d'eau ambiante et/ou mécaniquement au moyen d'un ressort (26).
  2. Agencement selon la revendication 1, dans lequel le tuyau télescopique extérieur (22) présente au sommet une bride (22') orientée vers l'intérieur dans la direction radiale et dans lequel le tube ascenseur (10) est muni au niveau de son extrémité inférieure d'un épaulement (30), un collier ou une saillie radiale périphérique similaire formée par ladite bride annulaire en forme de disque (30), entre lequel épaulement (30) et la surface inférieure de la bride à anneau en saillie vers l'intérieur (22') est monté un ressort de pression sous la forme d'un ressort hélicoïdal (26).
  3. Agencement selon la revendication 1, dans lequel la partie supérieure du tuyau extérieur (22) de l'agencement de tuyau télescopique (18) revêt la forme d'un cylindre (22a) pour un piston annulaire (32) qui est formé par ladite bride annulaire en forme de disque (32) et est reliée à la partie inférieure du tube ascenseur (10), laquelle partie fait partie de l'agencement de tuyau télescopique, des garnissages inférieur et supérieur (34, 36) définissant une chambre cylindrique (38) sous le piston (32), laquelle chambre cylindrique (38) est conçue de manière à lui permettre d'être évacuée, la partie inférieure (22b) dudit tuyau télescopique extérieur (22) est rentrée par rapport à la partie cylindrique supérieure (22a), le garnissage inférieur périphérique central (36) qui fournit un contact coulissant avec la partie inférieure du tube ascenseur (10) étant disposé au niveau de la transition (d'ici 40) entre les parties supérieure et inférieure de tuyau télescopique extérieur (22a, 22b) et dans lequel un tuyau sous vide (42) qui peut être relié à une pompe conçue pour être capable d'évacuer la chambre cylindrique (38) est relié à l'extrémité inférieure de la chambre cylindrique (38).
EP00911499A 2000-03-20 2000-03-20 Dispositif de contrainte de tube ascenseur compense en pilonnement Expired - Lifetime EP1266118B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2000/000096 WO2001077483A1 (fr) 2000-03-20 2000-03-20 Dispositif de contrainte de tube ascenseur compense en pilonnement

Publications (2)

Publication Number Publication Date
EP1266118A1 EP1266118A1 (fr) 2002-12-18
EP1266118B1 true EP1266118B1 (fr) 2005-10-05

Family

ID=19904196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00911499A Expired - Lifetime EP1266118B1 (fr) 2000-03-20 2000-03-20 Dispositif de contrainte de tube ascenseur compense en pilonnement

Country Status (7)

Country Link
EP (1) EP1266118B1 (fr)
AT (1) ATE306012T1 (fr)
AU (1) AU2000233365A1 (fr)
BR (1) BR0017176A (fr)
CA (1) CA2400736A1 (fr)
DE (1) DE60023039D1 (fr)
WO (1) WO2001077483A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO317231B1 (no) 2002-11-20 2004-09-20 Nat Oilwell Norway As Strammesystem for produksjonsror i et stigeror ved en flytende installasjon for hydrokarbonproduksjon
NO330288B1 (no) * 2008-06-20 2011-03-21 Norocean As Slippforbindelse med justerbar forspenning
US9528328B2 (en) 2012-01-31 2016-12-27 Schlumberger Technology Corporation Passive offshore tension compensator assembly
US9133670B2 (en) * 2012-07-26 2015-09-15 Cameron International Corporation System for conveying fluid from an offshore well

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211224A (en) * 1963-10-09 1965-10-12 Shell Oil Co Underwater well drilling apparatus
US3889747A (en) * 1973-07-23 1975-06-17 Regan Offshore Int Telescopic riser tensioning apparatus
NO153700C (no) * 1983-12-22 1986-05-07 Tentech Int As Marint stigeroersystem.
EP0478094A3 (en) * 1986-07-31 1992-05-20 Otis Engineering Corporation Method and system for attaching and removing equipment from a wellhead

Also Published As

Publication number Publication date
ATE306012T1 (de) 2005-10-15
DE60023039D1 (de) 2006-02-16
CA2400736A1 (fr) 2001-10-18
EP1266118A1 (fr) 2002-12-18
AU2000233365A1 (en) 2001-10-23
BR0017176A (pt) 2002-12-10
WO2001077483A1 (fr) 2001-10-18

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