EP1706578B1 - Plate-forme de transfert d'un bloc obturateur de puits - Google Patents

Plate-forme de transfert d'un bloc obturateur de puits Download PDF

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Publication number
EP1706578B1
EP1706578B1 EP04796902A EP04796902A EP1706578B1 EP 1706578 B1 EP1706578 B1 EP 1706578B1 EP 04796902 A EP04796902 A EP 04796902A EP 04796902 A EP04796902 A EP 04796902A EP 1706578 B1 EP1706578 B1 EP 1706578B1
Authority
EP
European Patent Office
Prior art keywords
platform
drilling
staging
assembly
support
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
EP04796902A
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German (de)
English (en)
Other versions
EP1706578A1 (fr
Inventor
Omar A. Rashid
Robert J. c/o Saudi Arabian Oil Co. RAWLS
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.)
Saudi Arabian Oil Co
Aramco Services Co
Original Assignee
Saudi Arabian Oil Co
Aramco Services 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 Saudi Arabian Oil Co, Aramco Services Co filed Critical Saudi Arabian Oil Co
Priority claimed from PCT/US2004/036324 external-priority patent/WO2005042914A1/fr
Publication of EP1706578A1 publication Critical patent/EP1706578A1/fr
Application granted granted Critical
Publication of EP1706578B1 publication Critical patent/EP1706578B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • the present invention relates generally to offshore drilling operations, and more specifically to an apparatus for removing and installing drilling equipment.
  • An offshore drilling facility includes a drilling rig for various operations performed while drilling a subsea well.
  • a conductor casing extends from the subsea well to an elevation above the surface of the water, where a working platform is connected to an upper portion of the conductor casing for drilling operators to work.
  • the drilling rig is often supported by a drilling platform or cantilever that extends from a side of the drilling facility, over the water, to a location above the drilling platform and conductor casing.
  • a drilling platform or cantilever that extends from a side of the drilling facility, over the water, to a location above the drilling platform and conductor casing.
  • a string of drill pipe is lowered from the drilling rig, through an opening in the cantilever, into the conductor casing for conducting drilling operations.
  • a blow out preventer (BOP) typically located within the cantilever, engages the upper end of the conductor casing.
  • the BOP regulates fluid flow out of the conductor casing from the subsea well.
  • BOPS blow out preventer
  • the term "BOP" as used in this application is not meant to designate either device, but rather to encompass each type known or foreseeable in the art. BOPs can weigh up to 40,000 lbs., and have large pieces that are cumbersome while being moved between various positions.
  • the BOP must be removed. During these operations, the BOP is typically hoisted and slid along rails to another location within the cantilever. Should a BOP need replacing or to be removed from the drilling facility, the upper surface of the cantilever prevents a crane from lifting the BOP from the storage or stowed position. Rather, the BOP must be moved to a location below the opening the drill pipe typically extends through for engaging the conductor casing.
  • the drilling rig cannot lift the BOP and continue drilling operations through the same opening in the upper surface of the cantilever. Therefore, the drilling rig discontinues drilling operations and disconnects from the conductor casing to lift the BOP out of the cantilever. Accordingly, the cantilever and drilling rig must be lifted, or "jacked up", relative to the conductor casing in order to disconnect from the conductor casing and allow room for the BOP over the conductor casing.
  • the drilling rig is then slid on the cantilever so that the BOP is at a position that is not directly above the conductor casing. Because the BOP is being lowered from the drilling rig, the vessel is in close proximity to the conductor casing and the supports of the facility. This creates a dangerous environment for the workers and the facilities. During normal weather conditions, this removal process can take two to three days. Under rough weather conditions, the process can take four to six days.
  • an offshore well drilling assembly comprising:
  • the drilling assembly can also include a rail for the staging platform to move along.
  • the platform can be driven by a motor located on the support platform or on the staging platform.
  • the staging platform can be moved along the outsize of the drilling platform or along an inside of the drilling platform, and extend onto the support platform.
  • the drilling platform can include an opening for the drilling rig to conduct operations on the subsea well. The platform moves along between the support platform and a distance at least as far away from the support platform as the opening.
  • the drilling facility can also include a lower rail to help guide the staging platform along the side of the drilling platform.
  • a plurality of columns, extending from a wall located along the drilling platform, can support the rails such that the lower rail is farther away from the drilling platform.
  • the lower rail can guide a roller located on the staging platform.
  • BOP 23 blow out preventer 23 is located within cantilever 17, below drilling rig 19.
  • BOP 23 engages an upper end of conductor casing 14 to regulate or prevent fluid flow through the upper end of conductor casing 14 during specific operations, or during emergencies.
  • BOP 23 is removed from conductor casing 14. For example, this may be while a tree is being installed.
  • BOP 23 is moved within cantilever 17 to a stowed or storage position away from conductor casing 14, as shown in Figure 1 .
  • movement of BOP 23 is along an overhead rail 26 because of the weight and size of BOP 23 and its associated parts.
  • BOP 23 When BOP 23 is not located within opening 20, BOP 23 is in a storage or stowed position within cantilever 17. As shown in Figure 2 , the stowed position can be to a side of opening 20 and conductor casing 14, or aft -- closer to the main portion of facility 11 (not shown). With either stowed position, BOP 23 is within cantilever 17.
  • BOP 23 when installing or removing BOP 23 within cantilever 17, BOP 23 was lifted through opening 20 because crane 24 cannot reach BOP 23 below the deck of cantilever 17. Therefore, during replacement and removal operations, BOP 23 was positioned within opening 20, and drilling rig 19 disengaged from drilling operations for lifting and lowering BOP 23 to vessel 25. This is a time consuming, dangerous, and expensive operation.
  • a staging platform 27, connected to an side of cantilever 17, is moveable between aft (adjacent to facility 11) and bow (away from facility 11) positions.
  • Staging platform 27 is preferably mounted to a wall 28 positioned along a side of cantilever 17.
  • staging platform 27 move along an outside portion of cantilever 17 ( Fig. 2 ) or move along an inside portion of cantilever 17 ( Fig. 4 ).
  • Staging platform 27 comprises a side 29 adjacent cantilever 17, a base 31 defining a floor of staging platform 27, and preferably a guardrail 33 extending from the base.
  • Staging platform 27 has been made in a manner known in the art for supporting large masses, for example, at least 40,000 lb.
  • staging platform 27 includes a plurality of trusses 34 designed to support the loads described above.
  • a plurality of rollers 35 are located along side 29 of staging platform 27, adjacent the side of cantilever 17 that staging platform 27 slides.
  • At least one rail 37 engages rollers 35 for supporting staging platform 27 from the side of cantilever 17.
  • Rollers 35 engage rails 37 for staging platform 27 to more easily slide along the side of cantilever 17.
  • cantilever 17 is equipped with rails leading to an opening for loading BOP 23 or other equipment onto staging platform 27.
  • a drive assembly comprising a motor 39 and gear assembly 41, engage a tensionable draw line 43 for moving staging platform 27 between aft and bow positions.
  • Gear assembly 41 can comprise a toothed end of a shaft extending from motor 39 that directly engages draw line 43, or a plurality of toothed gears that are rotated by a shaft from motor 39 and engage draw line 43.
  • motor 39 is a bi-directional motor in order to engage draw line 43 to move staging platform both toward and away from facility 11.
  • the toothed surface is rotated by motor 39, and acts as a pinion for engaging draw line 43.
  • draw line 43 can be any known apparatus for engaging a toothed gear or pinion.
  • draw line 43 can be a loop of chain links that loop around gear assembly 41 to pull either the upper or lower portions of the chain loop, depending on the direction of rotation of the pinion, to slide platform between aft and bow positions.
  • draw line 43 could also be a metal rod with a toothed profile for tangentially engaging the pinion, so that the rod and staging platform 27 slide between aft and bow positions depending upon the direction of rotation of the pinion.
  • draw line 43 can be any known apparatus for engaging a toothed gear or pinion.
  • draw line 43 can be a loop of chain links that loop around gear assembly 41 to pull either the upper or lower portions of the chain loop, depending on the direction of rotation of the pinion, to slide platform between aft and bow positions.
  • draw line 43 could also be a metal rod with a toothed profile for tangentially engaging the pinion, so that the rod and staging platform 27 slide between aft and bow
  • staging platform 27 slides along rail 37, with motor 39' and gear 41' being located on staging platform 27.
  • a plurality of teeth 51 are formed on rail 37 for gear 41' to engage in order to move staging platform 27 along rail 37.
  • a plurality of support columns 53 are connected to the wall 28.
  • support columns 53 connect rail 37 to wall 28 via a support member 59 ( Fig. 7 ).
  • a base rail 55 is preferably positioned below rail 37 for guiding rollers 35' extending from base 31 of staging platform 27.
  • Columns 53 also support base rail 55.
  • columns 53 have inclined faces 57 so that base rail 55 extends farther away from wall 28 than rail 37.
  • a rear support 61 extends from staging platform 27 over rail 37 to the side of rail 37 closest to wall 28.
  • BOP 23 is removed from conductor casing 14 in a manner readily known in the art, and drilling rig 19 can continue with operations.
  • BOP 23 is loaded onto staging platform 27 from within cantilever 17. Preferably this is performed with the assistance of rails and a side opening in cantilever 17 near a stowed position for BOP 23.
  • motor 39 engages draw line 43 through gear assembly 41, to move staging platform 27 away from facility 11 to the bow of cantilever 17.
  • Rollers 35 turn along rails 37 to allow for easier movement of staging platform 27 relative to the side of cantilever 17.
  • Staging platform 27 slides along rails 37 and wall 28 to a position farther away from facility 11 than opening 20, rig 19, and conductor casing 14.
  • Crane 24 offloads BOP 23 from staging platform 27 to vessel 25.
  • Vessel 25 remains a greater distance away from facility 11 than conductor casing 14, which reduces collision dangers previously associated with loading an unloading a BOP from an offshore facility.
  • Using crane 24 from vessel 25 allows the operator to continue using rig 19 for drilling operations rather than lifting and lowering BOP 23.
  • Using crane 24 also allows vessel 25 to load and unload BOP 23 from a position that is not as close to conductor casing 14 as leg 15 was previously required when using rig 19 to load and unload BOP 23.
  • the description and figures are merely illustrative of various embodiments. For example, while the equipment being transferred by platform has been described as BOP 23, it will be readily apparent to those skilled in the art that staging platform 27 can be used for transferring a variety of wellhead equipment, like rams and swivels.

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  • Earth Drilling (AREA)

Claims (18)

  1. Ensemble de forage de puits en mer, comprenant :
    une plate-forme de support (17), destinée à être placée en mer ; et
    une plate-forme de forage (17), montée en porte à faux sur la plate-forme de support (11), la plate-forme de forage (17) s'étendant depuis la plate-forme de support (11), de façon à être positionnée au-dessus d'un puits sous-marin, caractérisé en ce que l'ensemble comprend une plate-forme d'échafaudage (27), destinée à être utilisée pour le chargement et le déchargement d'un équipement de tête de puits et montée sur la plate-forme de forage (17), la plate-forme d'échafaudage (27) étant déplaçable le long d'un côté de la plate-forme de forage (17), en allant et venant depuis la plate-forme de support (11) à une certaine distance au-dessus de la mer.
  2. Ensemble de forage de puits en mer selon la revendication 1, dans lequel à plate-forme de support (11) est une plate-forme sur jambes à câbles tendus.
  3. Ensemble de forage de puits en mer selon la revendication 1 ou la revendication 2, dans lequel l'équipement de tête de puits comprend un obturateur (23),
  4. Ensemble de forage de puits en mer selon l'une quelconque des revendications 1 à 3, dans lequel la plate-forme d'échafaudage (27) est déplaçable dans une position située sur une partie de la plate-forme de support (11).
  5. Ensemble de forage de puits en mer selon l'une quelconque des revendications 1 à 4, comprenant en outre un rail, relié à la plate-forme de forage (17), et la plate-forme d'échafaudage (27) étant montée sur le rail (37).
  6. Ensemble de forage de puits en mer selon la revendication 5, dans lequel le rail (37) guide la plate-forme d'échafaudage lorsque la plate-forme d'échafaudage se déplace.
  7. Ensemble de forage de puits en mer selon la revendication 5 ou la revendication 6, dans lequel le rail (37) comprend une pluralité de dents (51).
  8. Ensemble de forage de puits en mer selon l'une quelconque des revendications 5 à 7, dans lequel le rail s'étend le long d'un premier chemin, décalé vis-à-vis de l'ouverture.
  9. Ensemble de forage de puits en mer selon l'une quelconque des revendications 5 à 8, comprenant en outre un deuxième rail (26), relié à la plate-forme de forage (17) est s'étendant le long d'un deuxième chemin, croisant l'ouverture et le premier chemin.
  10. Ensemble de forage de puits en mer selon la revendication 9, dans lequel l'équipement de tête de puits est suspendu au deuxième rail (26), 1 lorsque le deuxième rail (26) supporte et déplace l'équipement de tête de puits à l'intérieur de la plate-forme de forage (17).
  11. Ensemble de forage de puits en mer selon l'une quelconque des revendications précédentes, comprenant en outre un moteur (39, 39') connecté à la plate-forme d'échafaudage (27), servant à déplacer la plate-forme d'échafaudage (27) en rapprochement et en éloignement vis-à-vis de à plate-forme de support (11).
  12. Ensemble de forage de puits en mer selon l'une quelconque des revendications précédentes, dans lequel la plate-forme de forage (17) comprend en outre une ouverture (20) pour communiquer avec le puits sous-marin, la plate-forme d'échafaudage (27) s'écartant de à plate-forme de support (11), à une distance au moins égale à l'ouverture (20).
  13. Ensemble de forage de puits s en mer selon la revendication 12, dans lequel la plate-forme d'échafaudage (27) se déplace le long d'une ligne ne croisant pas l'ouverture.
  14. Ensemble de forage de puits en mer selon l'une quelconque des revendications précédentes, dans lequel la plate-forme d'échafaudage (27) comprend un ensemble support vertical, aligné avec une paroi (28) de la plate-forme de forage (17), et un ensemble support horizontal (31), s'écartant de l'ensemble support vertical, l'équipement de tête de puits étant chargé sur et déchargé de l'ensemble support horizontal (31).
  15. Procédé de transport d'un équipement de tête de puits, pour un ensemble de forage de puits en mer, comprenant :
    la fourniture d'une plate-forme de support (11), destinée à être placée en mer, et d'une plate-forme de forage (17), connectée à la plate-forme de support (11), la plate-forme de forage (17) s'étendant depuis la plate-forme de support (11), de manière que la plate-forme de support (11) soit montée en porte à faux depuis la plate-forme de support (11) ; et
    caractérisé en ce que le procédé comprend en outre la fourniture d'une plate-forme d'échafaudage (27) montée sur la plate-forme de forage (17), et
    le transport de l'équipement de tête de puits entre la plate-forme de support (11) et une distance au-dessus de la mer, par déplacement de la plate-forme d'échafaudage (27) le long de la plate-forme de forage (17).
  16. Procédé selon la revendication 15, comprenant en outre la fourniture d'une ouverture (20) formée dans à plate-forme de forage (17), pour intervenir sur un puits sous-marin ; et
    dans lequel la plate-forme d'échafaudage (27) est déplacée le long d'une ligne décalée vis-à-vis de l'ouverture (20), lorsque l'équipement de tête de puits est transporté.
  17. Procédé selon la revendication 16, dans lequel l'équipement de tête de puits est transporté avec la plate-forme d'échafaudage (27), entre la plate-forme de support (11) et une distance plus écartée de la plate-forme de support (11) que l'ouverture (20).
  18. Procédé selon l'une quelconque des revendications 15 à 17, comprenant en outre :
    la fourniture d'un ensemble de rail (26) monté dans la plate-forme de forage (17) ; est
    le transport de l'équipement de tête de puits, entre la plate-forme d'échafaudage (27) et l'ouverture (20), avec l'ensemble de rail (26).
EP04796902A 2003-10-29 2004-10-29 Plate-forme de transfert d'un bloc obturateur de puits Expired - Lifetime EP1706578B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51534203P 2003-10-29 2003-10-29
PCT/US2004/036324 WO2005042914A1 (fr) 2003-10-29 2004-10-29 Plate-forme de transfert d'un bloc obturateur de puits

Publications (2)

Publication Number Publication Date
EP1706578A1 EP1706578A1 (fr) 2006-10-04
EP1706578B1 true EP1706578B1 (fr) 2009-02-18

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EP04796902A Expired - Lifetime EP1706578B1 (fr) 2003-10-29 2004-10-29 Plate-forme de transfert d'un bloc obturateur de puits

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EP (1) EP1706578B1 (fr)
AT (1) ATE423267T1 (fr)
DE (1) DE602004019573D1 (fr)

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Publication number Publication date
EP1706578A1 (fr) 2006-10-04
ATE423267T1 (de) 2009-03-15
DE602004019573D1 (de) 2009-04-02

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