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  • 专利说明
  • 权利要求
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    • 专利摘要:
    OFFSHORE FLOATING INSTALLATION FOR OFFSHORE HYDROCARBON PRODUCTION, AND METHOD FOR DRILLING A WELL An offshore floating facility (1) for offshore hydrocarbon production, comprising an upper deck (11), a lower deck (12), a bay well (13) comprising a plurality of drilling notches and a plurality of production notches around said drilling notches, a carriage (20) carrying a drilling riser (17) and being movable with "said drilling riser within the opening of the plurality of drilling grooves, and a drilling apparatus (18) movable above the well bay to drill the well through the drilling riser.
    公开号:BR112014008875B1
    申请号:R112014008875-6
    申请日:2012-10-18
    公开日:2021-04-20
    发明作者:Philippe Labrugere
    申请人:Total Sa；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [0001] The present invention relates to a floating offshore installation for offshore hydrocarbon production. HISTORY OF THE INVENTION
    [0002] The present invention relates more precisely to an offshore floating installation for offshore hydrocarbon production.
    [0003] For hydrocarbon production from the deepest water wells, a skewed leg platform (TLP) can be used. A TLP is a floating structure tied to the seabed to eliminate the structure's pulling motion. Wells drilled on the seabed are connected to production equipment located above the floating structure through a plurality of production risers (pipes). The valves (trees) are then located out of the ocean water within the dry environment of the floating facility. Thanks to these dry trees, well maintenance and well interventions become easier.
    [0004] Some TLP can accommodate a drilling rig to drill and complete the wells and perform the necessary maintenance operations within the wells.
    [0005] It is known to provide a drilling apparatus that can be moved over the upper deck to be placed in at least two different positions in the floating installation. It is then possible to drill a plurality of wells in the installation, said wells being separated from each other by a maximum predetermined distance.
    [0006] According to a method used, the drilling riser and safety valve device that is installed in a first position are disconnected and removed to install in a second position. However, this method takes a long time and is expensive.
    [0007] According to another method, the installation is equipped with two drilling risers and two safety valve devices. However, these devices are expensive. OBJECTIVES AND SUMMARY OF THE INVENTION
    [0008] An objective of the present invention is to provide a floating offshore installation that can drill under the seabed a plurality of wells that are distant from each other.
    [0009] For this purpose, an offshore floating installation for offshore hydrocarbon production according to an embodiment of the invention comprises:
    [0010] - an upper deck and a lower deck,
    [0011] - a well bay located on the lower deck, said well bay being composed of a plurality of drilling slots and a plurality of production slots surrounding said drilling slots, each production slot being adapted to receive a production riser after a well is completed in a drilling notch next to said production notch, the plurality of drilling notches forming an opening within the lower deck,
    [0012] - a carriage located between the upper and lower deck, said carriage carrying a drilling riser and being mobile with "said drilling riser within a said opening of the plurality of drilling notches, and
    [0013] - a drilling rig located above the upper deck, said drilling rig being mobile above the well bay to be positioned in alignment above the carriage to allow drilling of the well using the drilling riser within the drilling slot.
    [0014] Thanks to these functions, the drilling riser can be disconnected from a completed and drilled well, and can be moved within the well bay to another position without withdrawing and without disconnecting all the tubes from the drilling riser. A lot of time is saved and operations are less expensive.
    [0015] Additionally, the upper deck does not comprise any production device, and is free to install the drilling tools.
    [0016] In addition, wells can be drilled anywhere on the seabed and according to a timing sequence that is more flexible. A first well can be drilled at a first location on the seabed, and a second well can easily be drilled after the first even if this second well has been positioned at a second location that is opposite the first.
    [0017] In various embodiments of the installation, one and/or other of the following functions may optionally be incorporated.
    [0018] According to one aspect of the invention, the installation further comprises a safety valve device located inside the carriage and connected above the drilling riser. The safety valve device can be moved by the carriage with the drill riser without disconnecting it from the drill riser.
    [0019] According to one aspect of the invention, the carriage is placed on skid rails on the lower deck to be supported vertically above the lower deck and to be movable longitudinally according to a bay direction, and the carriage is laterally in contact with the longitudinal beams of the upper deck to be held laterally according to a lateral direction perpendicular to said bay direction.
    [0020] According to one aspect of the invention, the perforation notches are closely aligned with each other according to a direction of the bay.
    [0021] According to one aspect of the invention, the well bay is arranged in accordance with a grid of the notch matrix having three rows and at least four columns, the external notches being the production notches and the internal notches being the notches of perforation.
    [0022] According to one aspect of the invention, the matrix grid comprises more than six columns to provide at least four perforation notches and fourteen production notches.
    [0023] According to one aspect of the invention, the production grooves and the perforation grooves are of the same size.
    [0024] According to one aspect of the invention, any perforation notch may be converted to a production notch by installing a rigid beam to close the notch and a production riser within said converted perforation notch.
    [0025] According to one aspect of the invention, the carriage comprises a conductive assembly that guides the drilling riser within the carriage in accordance with a direction of the riser. The drill riser can move back and forth according to the direction of the riser.
    [0026] According to an aspect of the invention, the installation further comprises a safety valve device located inside the carriage and is connected above the drilling riser, so that said safety valve device can be moved by the carriage with "the drill riser without disconnecting it from the drill riser, and the conductive assembly guides at least the drill riser and the safety valve device together inside the carriage according to the direction of the riser.
    [0027] According to one aspect of the invention, the carriage installation comprises a tension assembly for maintaining a tension force on the drill riser that lifts the drill riser to the carriage.
    [0028] According to one aspect of the invention, the carriage comprises a housing composed of a plurality of beams, and the conductive assembly comprises:
    [0029] - a connector bracket extending within the housing in accordance with directions substantially perpendicular to said direction of the riser, being in sliding contact with the side beams belonging to the housing, and being connected to the drilling riser through an attached tension ring to the perforation riser and extending laterally above the connector bracket, and
    [0030] - a guide support connected to the safety valve device and extending within the housing between said safety valve device to said side beams belonging to the housing, and said guide support being in sliding contact with said side beams , and the tension assembly comprises at least one piston connected to said housing and said connector bracket, said piston being controlled to generate said tension force.
    [0031] Another objective of the invention is to provide a method for drilling a well, wherein the method is implemented in an offshore floating facility for offshore hydrocarbon production, said offshore facility comprising:
    [0032] - an upper deck and a lower deck,
    [0033] - a well bay located on the lower deck, said well bay being composed of a plurality of drilling slots and a plurality of production slots surrounding said drilling slots, each production slot being adapted to receive a production riser after a well is completed in a drilling notch next to said production notch, the plurality of drilling notches forming an opening within the lower deck,
    [0034] - a carriage located between the upper and lower deck, said carriage carrying a drilling riser and being mobile with "said drilling riser within a said opening of the plurality of drilling notches, and
    [0035] - a drilling rig located above the upper deck, said drilling rig being mobile above the well bay to be positioned in alignment above the carriage to allow drilling of the well using the drilling riser within the drilling slot,
    [0036] and in which the method comprises the following initial steps:
    [0037] - moving the carriage to a non-punching notch, and
    [0038] - position the drilling device in the alignment above the carriage, and
    [0039] - connect the drilling riser to the well on the seabed.
    [0040] Thanks to these functions, a plurality of wells can be drilled on a deep seabed and another plurality of wells can simultaneously provide a hydrocarbon production. A new well can start drilling quickly after the first one is completed and ready for production. The drilled positions of the well on the seabed can be separated from each other by a wide distance. The number of wells connected to the installation can be high.
    [0041] In preferred embodiments of the method, one and/or other of the following functions may optionally be incorporated.
    [0042] According to one aspect of the invention, the method further comprises the following drilling steps after the initial steps:
    [0043] - Drill and complete a well of a drilling notch in the facility,
    [0044] - disconnect the drilling riser from said well on the seabed,
    [0045] - repeat the initial steps and drilling steps with another drilling notch to drill another well.
    [0046] According to one aspect of the invention, the method further comprises the following production steps after the disconnection step: installing a production riser in a production notch that is close to the drilling notch and connecting said production riser to the deep-sea well that is completed and ready for hydrocarbon production.
    [0047] According to one aspect of the invention, the installation further comprises a safety valve device located inside the carriage and connected above the drilling riser, and during the initial steps of the method, moving the carriage moves the drilling riser and the safety valve device together without disconnecting the safety valve device from the drilling riser. BRIEF DESCRIPTION OF THE DRAWINGS
    [0048] Other functions and advantages of the invention will be apparent from the detailed description of an embodiment given in the form of a non-limiting example, with reference to the attached drawings. In the drawings:
    [0049] - Figure 1 is a perspective view of a floating offshore installation according to the invention;
    [0050] - Figure 2 is a side view of the installation of Figure 1 shown in the ocean and the drilling riser and a plurality of production risers extending from the installation to the wells on the seabed;
    [0051] - Figure 3 is a top view of figure 2 showing the locations of the wells around the installation according to horizontal directions;
    [0052] - Figure 4 is a top sectional view of the installation of Figure 1, viewed between the upper and lower decks and showing the well bay in more detail;
    [0053] - Figure 5 is a perspective view of the car included between the upper and lower deck of the installation of figure 1; and
    [0054] - Figure 6 is a flowchart that shows the method for drilling a well using the installation of figure 1. MORE DETAILED DESCRIPTION
    [0055] In the various figures, the same reference numbers indicate identical or similar elements. The Z direction is a vertical direction. An X or Y direction is a horizontal direction or lateral direction. These are just indications for understanding the invention...
    [0056] Figures 1 and 2 represent an offshore floating structure or installation 1 for offshore hydrocarbon production according to the invention. Installation 1 comprises a hull structure 2 supported above the seawater surface 40 by several (eg four of them) adjustable buoyancy column tanks 3. The column 3 tanks are connected to each other at their lower ends by beams transversals 4, and at its upper ends by deck 11, 12 which supports the drilling, completion and production apparatus necessary for offshore hydrocarbon production. The hull structure 2 further comprises structure beams 10 which support at least an upper deck 11 and a lower deck 12.
    [0057] The floating installation 1 is secured to the seabed 41 by a set of rigid vertical tendons 6 made of pipe extending, for example, from the column 3 tanks to the seabed 41 where they are secured by foundations 6a. Furthermore, the support anchor chains 7 can be installed and controlled by winches to move the installation off floating 1 with respect to the seabed 41.
    [0058] The upper deck 11 supports a drilling apparatus 18 which is operable to drill underwater wells 42 extending from the seabed 41 to the hydrocarbon reservoir under the seabed. Drilling is carried out with a drill string 8 which is introduced to a drilling riser 17 of the drilling rig 18 and into the well. The upper deck 11 can also support many types of equipment, for example one or more cranes 5.
    [0059] The installation 1 according to the invention comprises a well bay 13 which is open through the lower deck 12. The well bay 13 has, for example, a rectangular shape which extends mainly according to the direction of the bay. BD. Other shapes of the well bay can be used.
    [0060] The bay of well 13 is composed of a plurality of regions that are adjacent to each other. These regions are called notches. The well bay 13 is, for example, arranged according to a grid of the notch matrix.
    [0061] The slots are of at least two types:
    [0062] - perforation notches 14 arranged adjacent to each other, each perforation notch 14 being adapted to receive a perforation riser 17, and
    [0063] - production notches 15, each production notch 15 being adapted to receive a production riser 16.
    [0064] The matrix grid can have three rows, and at least four columns. The outer notches of the grid are the production notches and the inner notches are the perforation notches.
    [0065] The matrix grid can have, for example, more than six columns to provide four perforation notches 14 and fourteen production notches 15.
    [0066] The plurality of drilling notches 14 form a continuous open opening in the lower deck 12. A device can be moved through said opening from any one of the drilling notches to any other of the drilling notches.
    [0067] The plurality of production notches 15 is surrounding the plurality of perforation notches 14. For each perforation notch 14, there are several production notches 15 next to said perforation notch 14.
    [0068] As shown in the realization of figure 4, the well bay 13 is arranged according to a grid of the notch matrix, comprising:
    [0069] - three rows R1, R2, R3 parallel to the direction of bay BD, and
    [0070] - nine columns perpendicular to the said direction of the bay.
    [0071] The second row R2 (central row) comprises seven notches being the perforation notches 14 and two notches at the ends of this central row R2 being production notches 15. The first and second row R1, R3 comprise only production notches 15 .
    [0072] The well bay then comprises a total of twenty production notches 14, ie approximately three production notches 15 for each drilling notch 14. The seven drilling notches 14 are surrounded by the twenty production notches 15.
    [0073] All notches (production and perforation notches) have the same shape and the same size. They are, for example, square.
    [0074] The production slots 15 are at least horizontally delimited on all sides by the frame beams 12a belonging to the lower deck 12. The inner part of each production slot 15 is opened through the lower deck 12 to install a production riser 16. Above the production riser 16 and the production notch 15 a wellhead is installed and all necessary tools for the extraction of hydrocarbon from the well connected to said production notch.
    [0075] The perforation slots 14 are horizontally delimited by frame beams 12a belonging to the lower deck 12, only to sides that are adjacent to a production slot 15. There is no cross-frame beam 12a between two adjacent perforation slots 14. All the perforation notches 14 form an opening in the lower deck 12. In the embodiment of figure 4, said opening is a wide opening of seven perforation notches 15 which are closely aligned with each other according to the direction of bay BD in the second row R2. This opening is like a wide slit in the lower deck 12.
    [0076] A perforation notch 14 can be converted to a production notch 15. A rigid beam is installed transversely on the open side of the perforation notch to close the notch and convert it to a production notch. The bay opening of well 13 is reduced in size. A perforation notch 14 at one end of the opening is first cast. The last drill notch 14 to be converted is the drill notch that is in the middle of the well bay. After the rigid beam is installed, the notch is converted: it has the same structure as a production 15 notch, ie four beams; one on each side of the notch. A production riser 16 can then be installed within the converted drill slot as is a production slot.
    [0077] A drilling riser 17 is a pipe that is installed between facility 1 and the underwater well, and that is used to drill the well, or a plurality of wells. This perforation riser 17 is, for example, a tube having a diameter of 20 inches. It is generally composed of a plurality of tubes approximately 24 meters long and are connected to each other adjacent to each other through joints or flanges. A drill string 8 is introduced into a drill riser 17 of drill rig 18 to drill the well. This drilling riser 17 is only used during a drilling period that can last, for example, three years. After this drilling period the drilling riser is not used.
    [0078] As seen in Figure 2, a drilling riser 17 in use extends from installation 1 to a well 42 on the seabed 41. The drilling riser 17 forms a first angle α with a vertical direction VD that is small and the first angle is, for example, less than 3°. In the figures, the vertical direction corresponds to the Z direction...
    [0079] A production riser 16 is a pipe that is installed between facility 1 and the underwater well, and which is used to extract hydrocarbon from the well in facility 1. This production riser 16 is not subject to mechanical drilling and may be less resistant. This production riser 16 is, for example, a tube having a diameter of 10 inches and 3/4. It comprises a plurality of tubes that are usually connected together through the threaded ends. Production riser 16 is used during the production period of a well that can last more than thirty years.
    [0080] A 16 production riser is less heavy than a 17 drill riser. However, a 16 production riser is more flexible than a 17 drill riser. The drill string 8 is rotating inside the drill riser 17 , and may cause friction and wear of the drill riser 17 if it is too steep.
    [0081] A production riser 16 extends from facility 1 to a completed well 42 on the seabed. The production riser 16 forms a second angle β with the vertical direction VD which can be greater than the first angle α of a drilling riser 17. The second angle β is, for example, less than 10°.
    [0082] The installation 1 according to the invention further comprises a carriage 20 which is located between the upper and lower decks 11, 12, and which can be moved from a drilling notch 14 to any other drilling notch 14 of the bay of the pit. Carriage 20 supports drill riser 17. Carriage 20 can be moved through the opening of the plurality of drill notches 14 without removing drill riser 17. Drilling riser 17 is just disconnected from well 42. Carriage 20 is drilling risers 17 are then movable together within said opening of well bay 13.
    [0083] Thanks to this function, the perforation riser 17 can be moved to any perforation notch 14. It can be moved to a chosen perforation notch which, from a top view (as in figure 3), is more close to the position of well 42 that is to be drilled.
    [0084] The carriage 20 is, for example, placed on skid rails 12b attached to the lower deck 12 to support vertically and to facilitate a longitudinal displacement, according to the direction of bay BD. The carriage 20 is, for example, still in lateral contact with the longitudinal beams 11a belonging to the upper deck 11 to keep it laterally according to a direction perpendicular to the direction of the bay.
    [0085] The carriage 20 is then enclosed within the structure of the installation, between the upper and lower decks 11, 12, to be held and guided for a controlled displacement above the plurality of perforation notches 14.
    [0086] Carriage 20 can then transfer to the facility structure a high level of force coming from the ocean action on the drilling riser 17.
    [0087] Installation 1 comprises carriage actuators 29 (visible in figure 5) to control the displacement of carriage 20 on skid rails 12b. It further comprises locking devices for rigidly securing the carriage 20 to the installation structure after being moved by the carriage actuators to a certain perforation notch 14. The carriage actuators 29 are of any type: electric actuator, pneumatic actuator or hydraulic actuator.
    [0088] The drilling apparatus 18 is still mobile above the well bay 13, and can be positioned on the upper deck 11 in alignment above the carriage 20 to allow drilling a new well of said drilling slot 14 and using the drilling riser 17 suspended inside the car 20.
    [0089] The drilling apparatus 18 can be moved on the upper deck 11 to be above any drilling notch 14, but still being above any production notch 15 for maintenance purposes.
    [0090] Installation 1 comprises actuators to move the drilling rig 18 above the upper deck 11. These actuators can be controlled to move the drilling rig 18 according to one or two directions on the horizontal surface of the upper deck 11. These actuators they can be electric, hydraulic or pneumatic actuators.
    [0091] According to a preferred embodiment of the invention, a safety valve device 21 (BOP) can be included inside the carriage 20.
    [0092] A safety valve device 21 is a device comprising valves that are installed to seal the well in the event of an emergency and to prevent leakage of hydrocarbon into the environment. The safety valve device 21 allows to control and monitor the hydrocarbon leaving the well. In the case of a TLP installation, the safety valve device is usually installed in the platform installation in a dry environment.
    [0093] The BOP 21 is then always connected above the drill riser 17. The connection and disconnection stages are avoided. Safety valve device 21 and perforation riser 17 are then moved together by carriage 20, without any disconnection. Much time is saved when one well is completed and another well must be started from another drill notch 14: Carriage 20 is moved between the drill notches.
    [0094] The BOP 21 is not disconnected from the drilling riser 17, and remains inside the carriage 20. It is not stored above the upper deck 11 where it can block the path on the upper deck, especially for drilling rig 18 operations. BOP 21 is itself stored inside car 20 between the upper and lower decks.
    [0095] The BOP 21 is a sealing device that makes the well safe. The BOP 21 is protected inside the car 20 against any accident or damage.
    [0096] Installation 1 is tethered to the seabed 41 by tendons 6 and the drilling riser 17 is subjected to ocean influence and movement between the seabed and the installation. In use, there may be relative displacement between drilling riser 17 and installation 1.
    [0097] The carriage 20 further comprises a conductive assembly 23 that guides the drilling riser 17 or the drilling riser 17 with "the BOP 21, inside the carriage 20 according to the direction of the riser RD.
    [0098] Car 20 comprises:
    [0099] - a housing 24 composed of a plurality of beams, the housing forms a substantially parallelepiped-shaped cage that surrounds and covers the perforation riser 17 and the BOP 21; and..
    [0100] - a connector bracket 25 having the form of a platform extending into the housing according to directions perpendicular to the direction of the riser RD, said connector bracket being in sliding contact with the side beams of the housing and extending from according to the direction of the riser RD.
    [0101] A tension ring 26 is attached to the drill riser 17 above the connector bracket 25. This tension ring 26 extends laterally and is securely connected to the connector bracket 25. The drill riser 17 is then secured to the connector bracket 25 which can slide back and forth inside the housing 24 according to the direction of the riser RD.
    [0102] In the case, the carriage 20 includes the BOP 21, the carriage 20 further comprises a guide support 28 connected to the BOP 21 and extending according to directions perpendicular to the direction of the riser RD inside the housing 24 between the BOP 21 and the housing side beams 24. The guide support 28 is in sliding contact with the housing side beams. The BOP 21 is then guided in displacement within the housing 24 according to said direction of the riser RD.
    [0103] Both the connector support 25 and the guide support 28 contribute to guide the displacements of the drilling riser 17 within the carriage 20. The carriage 20 may further comprise any other element to guide the displacement of the drilling riser inside the carriage.
    [0104] The direction of the RD riser may be parallel to the vertical direction VD of installation 1. However, it may be inclined with respect to said vertical direction.
    [0105] Carriage 20 further comprises a tension assembly 22 which maintains a tension force on the drill riser 17 in accordance with the direction of the riser RD. This tension force is a pulling force that lifts the drill riser to installation 1 to keep the drill riser 17 in a tensile state.
    [0106] The tension assembly 22 can comprise, for example, four pistons 27 connected at one end to the housing 24 and at the other end to the connector bracket 25. The pistons 27 are then pulling the connector bracket 25 upwards, i.e., in toward upper deck 11. Housing 24 transmits power to lower deck 11.
    [0107] Pistons 27 are, for example, hydraulic pistons.
    [0108] A new method for drilling a well will now be explained. The method utilizes any one or any combination of installation 1 embodiments as described above.
    [0109] Installation 1 used in the method at least comprises the following functions:
    [0110] - an upper deck 11 and a lower deck 12,
    [0111] - a well bay 13 located on the lower deck, the well bay being composed of a plurality of drilling slots 14 and a plurality of production slots 15 surrounding said drilling slots, each production slot being adapted to receive the production riser 16 after a well is completed in a drilling notch close to said production notch, the plurality of drilling notches forming an opening within the lower deck,
    [0112] - a carriage 20 located between the upper and lower deck, said carriage supporting the drilling riser 17 and being mobile with "said drilling riser within a said opening of the plurality of drilling notches, and
    [0113] - a drilling rig 18 located above the upper deck, said drilling rig being mobile above the well bay to be positioned in alignment above the carriage to allow drilling the well using the drilling riser within the drilling slot.
    [0114] As shown in Figure 6, the method comprises at least the following initial steps 100:
    [0115] - Move 101 the carriage to a 14-punching notch, and
    [0116] - position 102 the drilling device 18 in the alignment above carriage 20, and
    [0117] - connect 103 the drilling riser 17 to the well on the seabed.
    [0118] During the moving step 101, the carriage 20 moves the drilling riser 17 to a predetermined drilling notch 14. The drilling riser 17 is then moved from the installation 1 from a first drilling notch to a second drilling notch. , without removing all pipes from the drilling riser 17, and without storing these pipes in the installation structure.
    [0119] Thanks to the above method, a lot of time is saved, and a second well can be drilled from the second drilling notch right after the first well is drilled and completed.
    [0120] In addition, the drilling riser 17 can be moved through the opening of the well bay to drill the wells that are separated from each other a wide distance as seen in the top view of figure 3.
    [0121] To drill these wells, the drilling riser 17 is inclined by a first angle α which is much smaller than the second angle β.
    [0122] It is then possible to have a floating offshore facility 1 that manages a high number of wells, and for example more than fourteen wells.
    [0123] The method may further preferably comprise the following drilling steps 110 after initial steps 100:
    [0124] - Drill 111 and complete a well of a 14 drill notch in the facility,
    [0125] - disconnect 112 the drilling riser 17 from said well on the seabed,
    [0126] and wherein the initial steps 100 and drilling steps 110 above are repeated with another drilling notch 14 to drill another well. The other piercing notch is a second piercing notch that is different from the first piercing notch (the piercing notch in the first circuit).
    [0127] Thanks to the above steps, the drilling riser 17 is just disconnected on the seabed 41, without taking it out of the ocean and without disconnecting it from car 20. A lot of time is saved.
    [0128] Additionally, the method further comprises at least one production step after disconnection step 112, said production step being operated in parallel to the drilling steps and/or initial step: installing the production riser in a notch of production that is close to the drill notch and connects said production riser to the deep-sea well that is completed and ready for hydrocarbon production.
    [0129] A production notch 15 which is close to a perforation notch 14 is, for example, a production notch 15 comprising a side or a corner in contact with the perforation notch.
    [0130] It may be a production notch that is located at a distance from the perforation notch 14 that is less than a predetermined distance. For example, in case the notch has a square shape, the predetermined distance is approximately one size of the side of a notch, or twice said side size.
    [0131] Depending on the flexibility or slope capacity of the production riser 16 used, any production notch 15 of the well bay can be used to install the production riser 16 that is connected to the currently completed well and drilled from the drilling notch 14 .
    [0132] As this can be understood from Figure 3, the perforation notch is preferably chosen for the first angle α of the perforation riser 17 to be as little as possible. Friction within the riser during drilling is then limited and reduced.
    [0133] A drilling sequence of the complete plurality of wells can be predetermined before drilling the first well, and thanks to the invention, this sequence can be adapted while drilling the wells in the sequence.
    [0134] Optionally, carriage 20 includes a safety valve device 21. BOP 21 is located within carriage 20 and connected above drill riser 17, and during initial steps 100 of the method, movement step 101 of the The carriage moves the drill riser 17 and the safety valve device 21 together without disconnecting the safety valve device 21 from the drill riser 17.
    权利要求:
    Claims (19)
    [0001]
    1. OUTDOOR FLOATING INSTALLATION (1) FOR OUTDOOR HYDROCARBIDE PRODUCTION, where the offshore installation comprises: - an upper deck (11) and a lower deck (12), - a well bay (13) located on the deck lower, said well bay being composed of a plurality of drilling notches (14) and a plurality of production notches (15) surrounding said drilling notches, each production notch being adapted to receive a production riser (16 ) after a well is completed in a drilling notch close to said production notch, the plurality of drilling notches forming a continuous opening within the lower deck, - a drilling riser (17) extending from the well bay to the well, - a carriage (20) located between the upper and lower deck, said carriage supporting said drilling riser (17) and being movable with said drilling riser to a determined drilling notch within a said opening of the plurality of ents drilling rigs, and- a drilling rig (18) located on the upper deck, said drilling rig being movable above the well bay to be positioned in alignment above the carriage to allow drilling the well to use the drilling riser within of the determined perforation slot, the floating offshore installation (1) being characterized by the carriage (20) being placed on the skid rails (12b) on the lower deck to be supported vertically above the lower deck and to be movable longitudinally according to a bay direction (BD), and wherein the carriage (20) is laterally in contact with longitudinal beams (11a) of the upper deck (11) to be held laterally according to a lateral direction perpendicular to said bay direction (BD) .
    [0002]
    2. INSTALLATION according to claim 1 characterized in that the car is in simultaneous contact with the upper deck and lower deck to transfer a force on both said decks.
    [0003]
    3. INSTALLATION, according to claim 1, characterized in that the car is attached at least to the lower deck, when the car does not move and is positioned in the perforation slot determined to drill a well.
    [0004]
    4. INSTALLATION, according to claim 1, characterized in that it further comprises a safety valve device (21) located inside the carriage (20) and connected above the perforation riser (17) so said safety valve device ( 21) can be moved by the carriage with the drill riser (17) without disconnecting it from the drill riser.
    [0005]
    5. INSTALLATION according to any one of claims 1 to 4, characterized in that the perforation notches (14) are closely aligned with each other according to a direction of the bay (BD)...
    [0006]
    6. INSTALLATION according to any one of claims 1 to 5, characterized in that the well bay is arranged in accordance with a grid of the notch matrix having three rows and at least four columns, the external notches being the production notches and the internal notches being the perforation notches.
    [0007]
    INSTALLATION according to claim 6, wherein the matrix grid is characterized in that it comprises more than six columns to provide at least four perforation notches and fourteen production notches.
    [0008]
    INSTALLATION according to any one of claims 1 to 7, characterized in that the production notches (15) and the perforation notches (14) are of the same size.
    [0009]
    9. INSTALLATION according to any one of claims 1 to 8, characterized in that any perforation notch (14) can be converted into a production notch (15) by installing a rigid beam to close the notch and a production riser within the converted punching notch.
    [0010]
    10. INSTALLATION according to claim 1, wherein the carriage (20) is characterized by comprising a conductive assembly (23) that guides the drilling riser inside the carriage according to a riser direction (RD) to the perforation riser (17) can move back and forth according to said riser direction.
    [0011]
    11. INSTALLATION, according to claim 10, further characterized in that it comprises a safety valve device (21) located inside the carriage (20) and connected above the perforation riser (17), for said safety valve device. safety (21) can be moved by the carriage with the drill riser (21) without disconnecting it from the drill riser, and wherein the conductive assembly (23) guides at least the drill riser and the safety valve device together inside the car according to the said direction of the riser.
    [0012]
    The INSTALLATION according to claim 10 or 11, wherein the carriage (20) is characterized by comprising a tension assembly (22) for maintaining a tension force on the drill riser which lifts the drill riser to the carriage.
    [0013]
    INSTALLATION according to claim 12, wherein the carriage (20) is characterized in that it comprises a housing (24) composed of a plurality of beams, e14. that the conductive assembly (22) comprises: - a connector support (25) that extends inside the housing (24), according to directions perpendicular to said direction of the riser, being in sliding contact with the side beams belonging to the housing, and being connected to the drill riser through the tension ring (26) secured to the drill riser and extending laterally above the connector bracket, and - a guide bracket (28) connected to the safety valve device (21) and if extending within the housing (24) between said safety valve device to said side beams belonging to the housing, and said guide support being in sliding contact with said side beams, and wherein the tension assembly (23) comprises at least a piston (27) connected to said housing and said connector support, said piston being controlled to generate said tension force.
    [0014]
    14. METHOD FOR DRILLING A WELL, wherein said method is implemented in an offshore floating facility (1) for offshore hydrocarbon production, said offshore facility comprising:- an upper deck (11) and a lower deck ( 12), - a well bay (13) located on the lower deck, said well bay being composed of a plurality of drilling notches (14) and a plurality of production notches (15) surrounding said drilling notches, each production notch being adapted to receive a production riser (16) after a well is completed in a drilling notch next to said production notch, the plurality of drilling notches forming a continuous opening within the lower deck,- a riser rig (17) extending from the well bay to the well, - a carriage (20) located between the upper and lower deck, said carriage supporting said drilling riser (17) and being mobile with said drilling riser drilling for a notch of drilling determined within said opening of the plurality of drilling slots, - a drilling apparatus (18) located on the upper deck, said drilling apparatus being movable above the well bay to be positioned in alignment above the carriage to allow drilling the well by using a drilling riser within the given drilling slot, and wherein the carriage (20) is placed on skid rails (12b) on the lower deck to be supported vertically above the lower deck, and wherein the carriage (20 ) is laterally in contact with longitudinal beams (11a) of the upper deck (11), and in which the method is characterized by comprising the following initial steps (100): - moving (101) on the skid rails longitudinally according to a direction from the bay (BD) to said determined perforation notch, said carriage being held laterally by the longitudinal beams (11a) according to a lateral direction perpendicular to said direction of the b. aia (BD), and attaching the carriage to said determined drilling notch, e-positioning (102) the drilling apparatus in alignment above the carriage, and-connecting (103) the drilling riser to the well on the seabed.
    [0015]
    15. METHOD according to claim 14, characterized in that the car is in simultaneous contact with the upper deck and lower deck to transfer a force on both said decks.
    [0016]
    16. METHOD, according to claim 14, characterized in that the car is attached at least to the lower deck, when the car does not move and is positioned in the perforation slot determined to drill a well.
    [0017]
    17. The METHOD according to claim 14, further characterized in that it comprises the following drilling steps (110) after the initial steps (100): - drilling (111) and completing a well of a drilling notch in the installation, and - disconnecting (112) the drilling riser from said well on the seabed, and wherein the initial steps (100) and the above drilling steps (110) are repeated with another drilling notch (14) to drill another well.
    [0018]
    18. METHOD, according to claim 17, further characterized by comprising the following production steps after the disconnection step: installing a production riser in a production notch that is close to the drilling notch and connecting to said production riser production to the deep-sea well that is complete and ready for hydrocarbon production.
    [0019]
    19. METHOD according to any one of claims 14 to 18, wherein an installation (1) is further characterized by comprising a safety valve device (21) located inside the carriage (20) and connected above the drilling riser (17), and wherein during the initial steps (100) of the method, moving (101) the carriage moves the perforation riser (17) and the safety valve device (21) together without disconnecting the safety valve device of the drilling riser.
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    同族专利:
    公开号 | 公开日
    EP2769047B1|2019-01-09|
    ZA201402589B|2015-11-25|
    US20140318863A1|2014-10-30|
    EA025077B1|2016-11-30|
    CN104011317A|2014-08-27|
    KR20140097179A|2014-08-06|
    EP2769047A2|2014-08-27|
    EA201400479A1|2014-07-30|
    US20160221648A1|2016-08-04|
    AP2014007586A0|2014-04-30|
    US9493217B2|2016-11-15|
    WO2013057166A3|2013-12-12|
    MY170439A|2019-07-31|
    AU2012324909B2|2017-02-02|
    US9341024B2|2016-05-17|
    BR112014008875A2|2017-04-25|
    CY1121487T1|2020-05-29|
    KR101952355B1|2019-02-26|
    US9341025B2|2016-05-17|
    WO2013057166A2|2013-04-25|
    US20140231089A1|2014-08-21|
    AU2012324909A1|2014-05-01|
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    法律状态:
    2017-05-02| B15I| Others concerning applications: loss of priority|
    2017-06-27| B12F| Other appeals [chapter 12.6 patent gazette]|
    2019-03-12| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-29| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-03-02| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-04-20| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 18/10/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161548339P| true| 2011-10-18|2011-10-18|
    US61/548,339|2011-10-18|
    PCT/EP2012/070614|WO2013057166A2|2011-10-18|2012-10-18|A floating offshore facility and a method for drilling a well|
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