WO2002068791A1 - Agencement de raccordement d'une colonne montante a un ensemble de production flottant - Google Patents

Agencement de raccordement d'une colonne montante a un ensemble de production flottant Download PDF

Info

Publication number
WO2002068791A1
WO2002068791A1 PCT/NO2002/000081 NO0200081W WO02068791A1 WO 2002068791 A1 WO2002068791 A1 WO 2002068791A1 NO 0200081 W NO0200081 W NO 0200081W WO 02068791 A1 WO02068791 A1 WO 02068791A1
Authority
WO
WIPO (PCT)
Prior art keywords
riser
production assembly
arrangement according
cylinder housing
floating production
Prior art date
Application number
PCT/NO2002/000081
Other languages
English (en)
Other versions
WO2002068791A8 (fr
Inventor
Ole Engen
Johnny Salen
Odd Mohus
Original Assignee
Fred.Olsen Production As
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 Fred.Olsen Production As filed Critical Fred.Olsen Production As
Publication of WO2002068791A1 publication Critical patent/WO2002068791A1/fr
Publication of WO2002068791A8 publication Critical patent/WO2002068791A8/fr

Links

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 relates to an arrangement in a floating production assembly, comprising at least one to the production assembly associated Xmas tree which is interconnected via a riser to a wellhead on the sea bed.
  • the production assembly is exposed for relative motions with respect to the riser and the Xmas tree, and the riser is connected to the floating production assembly via a number of load supporting and compensating working cylinders that continuously transfer the load of the riser.
  • the present invention is developed in connection with a new design for arranging a "dry" Xmas tree on a floating rig that is used during production of oil and gas.
  • dry Xmas tree means a Christmas valve tree located above the sea level, i.e. on the rig.
  • the concept is in particular designed for floating production assemblies, like vessels and rigs, that operate on deep waters, often 500 meters or more. During normal conditions, the relative motion between the rig and the Xmas tree oscillates about two meters and can during severe conditions oscillate more than ten meters.
  • the riser In addition to the motions of the rig due to waves and tides, the riser will be exposed for thermal expansion, contraction and the influence of pressure. This is source to substantial motion between the rig and the riser, both vertically and horizontally.
  • the presently proposed arrangement will reduce the construction height of the rig, in particular provide for a smaller distance between the main deck and the drill floor of the rig and thus obtain a derrick extending less high even if the height of the derrick remains. This, in turn, contributes to lower the centre of gravity of the rig, which improves the stability of the rig and provides increased variable load capacity for the main deck.
  • Each cylinder housing is preferably connected to the riser a distance well apart from the lower end of the cylinder housing. In order to provide optimum effect, each cylinder housing can be connected to the riser close to the point where the cylinder rod extends out of the cylinder housing.
  • each cylinder rod is preferably articulated connected to the floating production assembly.
  • each cylinder housing can be articulated connected to the riser.
  • connection between the cylinder housing and the riser can be in form of a tension ring that is rigidly fixed to the riser.
  • the risers are guided in level with the main deck by means of embracing devices that attend to the centring of each individual riser, yet with clearance therebetween.
  • this will be a point about which the riser is swinging and may result in a substantial sway of the upper part of the riser including the Xmas tree proper.
  • the horizontal motions of the Xmas tree will consequently increase with the height thereof above the swinging point.
  • this may easily create severe collisions, or they need to be placed well apart from each other.
  • the Xmas tree according to the invention comprises a number of guides that cooperate with a corresponding number of guiding elements that extend substantially vertically between the main deck and the drill floor of the production assembly.
  • a working platform can be arranged around the Xmas tree, preferably with a handrail.
  • the upper part of the riser i.e. the Xmas tree
  • the riser needs to be brought into the drilling centre of the derrick. This will be performed in a direction extending transversally of the main transfer direction of the derrick.
  • an opening is provided in the main deck through which the riser extends, and this opening is defined by a displaceable frame.
  • each cylinder rod is suitably fixed to the displaceable frame.
  • Fig.l shows an elevation view of a floating production assembly with an arrangement according to the invention installed
  • Fig.2 shows from below and in perspective view an arrangement according to the invention, isolated from the floating production assembly
  • Fig.3 shows from above and in perspective view an arrangement according to the invention, isolated from the floating production assembly
  • Fig.4 shows schematically a principle drawing of the arrangement according to the invention.
  • Fig.5 shows schematically a principle drawing of an arrangement according to the prior art.
  • fig.1 shows an example of a floating production assembly 10 having pontoons 11, a number of vertical columns 12 and an upwardly extending derrick 15.
  • the floating production assembly 10 includes a main deck 13 and one with respect to the main deck 13 elevated drill floor 14.
  • the derrick 15 is transferable back and forth along a main direction on the drill floor 14, in the shown embodiment transversally of the production assembly 10.
  • the figure shows two risers 5 that are in communication with a wellhead on the seabed (not shown). It is to be understood that a series of risers 5, e.g. 16, are deployed after each other inwards of the paper plane. Each riser 5 terminates in the upper end thereof in a Xmas tree 6, which is in communication with piping onboard the production assembly 10 via a hose 7. It is to be understood that the respective risers 5 including the Xmas tree 6 remain substantially stationary in the vertical direction, while the floating production assembly 10 follows the motions of the sea.
  • Fig.2 and 3 show in closer detail how the arrangement 1 according to the invention is installed to the floating production assembly 10. Openings 16 through which the risers 5 pass are provided in the main deck 13. A number of guiding elements 7, here four per riser 5, are tensed between the main deck 13 and the drill floor 14. A corresponding number of guides 8, with which respective guiding elements 7 interact, are associated with each Xmas tree 6.
  • the guiding element 7 can be in form of a wire, stay, rail, etc.
  • the guide 8 can be in form of a sleeve, pulley, sheave, etc.
  • a platform 9 having handrails, is provided around the Xmas tree 6 for easy access thereto.
  • the respective guides 8 are arranged at the periphery of the platform 9.
  • the Xmas tree 6 is continuously guided during movements thereof and is not exposed to swaying motions. This because the Xmas tree 6 at any time will coincide with the swaying point of the riser 5 during horizontal motions of the production assembly 10.
  • a displaceable frame 4 is arranged around each riser 5.
  • Each frame 4 can be displaced back and forth along respective opening 16 in a direction transversally to the transfer direction of the derrick 15.
  • the purpose of this transfer ability is to be able to bring the riser 5 within the drilling centre C in order to enable intervention of the well on the seabed via the riser 5. This is performed by means of the derrick 15, which is transferred into the drilling centre C, and a pipe string (not shown) that is lowered from the derrick 15.
  • the frame 4 jointly with the riser 5 and the Xmas tree 6 are transferred back to the position shown in the figure. It is to be noted that the above described guiding wires 7 normally will be fixed to the frame 4 and need to be disconnected before displacement of the frame 4 can take place.
  • a number of working cylinders 2, hydraulic or pneumatic, are arranged to the frame 4 and are projecting downwards therefrom. They are interconnected via a tension ring 3, which is rigidly fixed to the riser 5.
  • the tension ring 3 supports the load of the riser 5 and the strains are in turn transferred to the main deck 13 via the working cylinders 2.
  • the working cylinders 2 are inverse mounted (compared to the prior art), i.e. the free end of the cylinder rod 2a is mounted to the main deck 13 and the cylinder housing 2b is in connection with the riser 5, preferably via a tension ring 3.
  • the cylinder rod 2a is mounted to the main deck 13 by an articulation 2c.
  • the cylinder housing 2b is mounted to the tension ring 3 via an articulation 2d.
  • Fig.5 illustrates how the working cylinders are mounted today. When one knows that the working cylinders 2 must be able to compensate for a range spanning more than ten meters, as indicated with the arrow B, this provides large construction height on existing rigs. Should the cylinder housings 2b, when inverted, project into the sea, it would not really matter.
  • a normal range of motions for waves and tides can vary between one and five meters and is indicated with the arrow E on fig.4. What is saved in construction height for the drill floor 14 is indicated with the arrow A. The height from the mean sea level to the tension ring 3 is indicated with the arrow D. The corresponding distance with the solution according to the prior art is indicated with the arrow F on fig.5. The height D could be subject to further decrease, but a certain minimum height should always be present between the sea level and the main deck, depending on the waters in which the floating production assembly 10 is to operate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un agencement (1) dans un ensemble (10) de production flottant comprenant au moins un arbre de Noël (6) associé à l'ensemble de production (10), lequel est interconnecté par l'intermédiaire d'une colonne montante (10) à une tête de puits se trouvant sur le fond de l'océan. L'ensemble de production (10) est exposé pour avoir des mouvements relatifs à la colonne montante (5) et l'arbre de Noël (6). La colonne montante (5) est reliée à l'ensemble (10) de production flottant par l'intermédiaire d'une certain nombre de vérins (2) travaillant au support et à la compensation de la charge lesquels transfèrent en continu la charge de la colonne montante (5). Les vérins (2) travaillant au support et à la compensation de la charge sont montés de manière inversée et chaque logement (2b) de vérin est relié à la colonne montante (5) et chaque barre (2a) de vérin est reliée à l'ensemble de production flottant.
PCT/NO2002/000081 2001-02-28 2002-02-27 Agencement de raccordement d'une colonne montante a un ensemble de production flottant WO2002068791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20011042 2001-02-28
NO20011042A NO20011042L (no) 2001-02-28 2001-02-28 Anordning ved en flytende produksjonsenhet

Publications (2)

Publication Number Publication Date
WO2002068791A1 true WO2002068791A1 (fr) 2002-09-06
WO2002068791A8 WO2002068791A8 (fr) 2003-12-11

Family

ID=19912196

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2002/000081 WO2002068791A1 (fr) 2001-02-28 2002-02-27 Agencement de raccordement d'une colonne montante a un ensemble de production flottant

Country Status (2)

Country Link
NO (1) NO20011042L (fr)
WO (1) WO2002068791A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009024760A3 (fr) * 2007-08-17 2009-05-22 Grenland Group Technology As Ensemble raccordement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449854A (en) * 1981-02-12 1984-05-22 Nl Industries, Inc. Motion compensator system
GB2156401A (en) * 1984-03-29 1985-10-09 Univ London Vessel motion compensation
US4799827A (en) * 1986-11-17 1989-01-24 Vetco Gray Inc. Modular riser tensioner incorporating integral hydraulic cylinder accumulator units
WO1993019280A1 (fr) * 1992-03-26 1993-09-30 Pm Engineering Norway A.S. Appareil tendeur de colonne montante, a charge repartie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449854A (en) * 1981-02-12 1984-05-22 Nl Industries, Inc. Motion compensator system
GB2156401A (en) * 1984-03-29 1985-10-09 Univ London Vessel motion compensation
US4799827A (en) * 1986-11-17 1989-01-24 Vetco Gray Inc. Modular riser tensioner incorporating integral hydraulic cylinder accumulator units
WO1993019280A1 (fr) * 1992-03-26 1993-09-30 Pm Engineering Norway A.S. Appareil tendeur de colonne montante, a charge repartie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009024760A3 (fr) * 2007-08-17 2009-05-22 Grenland Group Technology As Ensemble raccordement

Also Published As

Publication number Publication date
NO20011042D0 (no) 2001-02-28
NO20011042L (no) 2002-08-29
WO2002068791A8 (fr) 2003-12-11

Similar Documents

Publication Publication Date Title
CN110077538B (zh) 海上钻探系统、船及方法
US4702321A (en) Drilling, production and oil storage caisson for deep water
US6161620A (en) Deepwater riser system
US7416025B2 (en) Subsea well communications apparatus and method using variable tension large offset risers
US9874060B2 (en) Offshore drilling system, vessel and methods
US6470969B1 (en) Arrangement on a floating device for overhauling offshore hydrocarbon wells
US20050077049A1 (en) Inline compensator for a floating drill rig
OA11897A (en) Riser tensioning system.
AU2005202612A1 (en) Dry tree subsea well communications apparatus and method using variable tension large offset risers
US20110240305A1 (en) Floating well intervention arrangement comprising a heave compensated work deck and method for well intervention
US20010013414A1 (en) Floating spar for supporting production risers
US4470721A (en) Crane assembly for floatable oil/gas production platforms
KR20120035432A (ko) 상하동요 보상장치
EP1639227B1 (fr) Colonne de mont e de forage en mer
WO2000058597A1 (fr) Procede d'installation d'un certain nombre de colonnes montantes ou de cables et vaisseau a cet effet
WO2004013452A1 (fr) Dispositif tensionneur de tube prolongateur
GB2412130A (en) Arrangement and method for integrating a high pressure riser sleeve within a low pressure riser
WO2002068791A1 (fr) Agencement de raccordement d'une colonne montante a un ensemble de production flottant
US6244347B1 (en) Subsea well drilling and/or completion apparatus
WO2019160414A1 (fr) Navire et procédé pour effectuer des activités associées à un puits sous-marin, par exemple des activités de reconditionnement, une maintenance de puits, l'installation d'un objet sur un puits de forage sous-marin
WO2010002268A1 (fr) Dispositif d'élévation pour une installation flottante
RU2161691C2 (ru) Способ наведения противовыбросового оборудования и устройство для его осуществления
KR101711471B1 (ko) 시추 장치
KR20190042965A (ko) 드릴링 리그용 트롤리의 로드 테스트 시스템
WO1999014462A1 (fr) Installation de colonne montante et systeme de colonne montante

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
CFP Corrected version of a pamphlet front page
CR1 Correction of entry in section i

Free format text: IN PCT GAZETTE 36/2002 DUE TO A TECHNICAL PROBLEM AT THE TIME OF INTERNATIONAL PUBLICATION, SOME INFORMATION WAS MISSING (81). THE MISSING INFORMATION NOW APPEARS IN THE CORRECTED VERSION

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP