• 专利附录
  • 专利说明
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    • 专利摘要:
    system for connecting a lower marine riser bale to a marine riser, method for disconnecting a marine riser joint from a lower marine riser bale, system for connecting a lower marine riser bale to a drilling rig located on a marine surface and method for connecting a marine riser joint to a marine riser adapter located at an underwater location. it is a drilling riser adapter (11) that, in a variable way, connects and releases a riser (17) from a subsea wellhead assembly. the drill riser adapter (11) has a hydraulically driven hitch assembly (41) to selectively engage and disengage a bottom end of the marine riser (17). the drill riser adapter (11) also includes a control panel (141) communicably coupled to the hitch assembly (41) to drive the hitch assembly (41) to engage and disengage the bottom end of the marine riser (17 ). the drill riser adapter (11) also includes a hydraulic fluid pressure receptacle (135) on the control panel (141) for coupling by a remote-controlled underwater vehicle to supply hydraulic fluid pressure to the coupling assembly (41) . the drilling riser adapter (11) can be powered by a submarine to release a first riser from the wellhead assembly, and connect to a second riser
    公开号:BR102012004559B1
    申请号:R102012004559-1
    申请日:2012-02-29
    公开日:2020-03-10
    发明作者:Eric Dale Larson；Robert Allen Blue
    申请人:Vetco Gray, Inc.；
    IPC主号:
    专利说明:

    “SYSTEM FOR CONNECTING A SET OF LESSER MARINE RISER TO A MARINE RISER” Field of the Invention [001] The present invention relates, in general, to marine well riser adapters and, in particular, to a system for connecting adapters of riser to subsea equipment with subsea functionality.
    Background of the Invention [002] In offshore drilling operations, the operator will perform drilling operations through a drilling riser. The drilling riser extends between the subsea wellhead assembly on the seabed and the drill rig. The drill riser is made up of numerous individual sections or tubular units. These sections are attached to each other and operated from a riser implantation floor of the drill rig. The drill riser usually also has a number of auxiliary ducts that extend around the main center tube. Auxiliary ducts provide hydraulic fluid pressure to the subsea blowout preventer and the lower marine riser assembly.
    [003] The bottom end of the drilling riser has an adapter that attaches to a lower marine riser assembly (LMRP) to connect the riser to the LMRP. Several adapters were employed. Adapter connections include bolted flanges and radially movable locking segments using screws. The LMRP is attached to a set of eruption preventers (BOP). The BOP is coupled through a hydraulic connector to an underwater wellhead assembly on the seabed. The LMRP also includes an emergency disconnect to quickly release from the BOP. The various hydraulically driven components of the LMRP are equipped with hydraulic fluid and controlled by tubes that lead to the surface vessel.
    [004] In both types of riser adapters, operators use wrenches to compose the screws or bolts. Composing the individual screws takes time. Often, when moving the drill rig from place to place, the riser has to be pulled and stored. In very deep water, pulling and reoperating the riser is very expensive. At least one automated system is shown in U.S. Patent 6,330,918 for composing riser locking segment screws.
    [005] Additionally, automated and non-automated riser adapters fail to provide a way to break the connection between the riser and the LMRP once the adapter and the set are at the bottom of the sea. Thus, where emergency events require the ability to quickly disconnect an existing riser from the riser adapter, while the LMRP remains at the bottom of the sea, operators cannot do so quickly. This can further exacerbate a potentially dangerous situation. The emergency disconnect is controlled from the vessel, and the control tube could be lost.
    Description of the Invention [006] These and other problems are generally solved or circumvented, and technical advantages are generally obtained, through preferred embodiments of the present invention that provide a drilling riser adapter with subsea functionality, and a method for using the same .
    [007] An embodiment of the present invention provides a system for connecting a lower marine riser assembly (LMRP) to a marine riser. The LMRP and BOP will be installed under water in a wellhead, so that the riser will extend from the wellhead to a drilling rig located on a marine surface. The system comprises a drill riser adapter and a control panel. The drill riser adapter has a hydraulically driven hitch assembly. The hitch assembly selectively engages and disengages a bottom end of the marine riser. The control panel communicates with the hitch assembly and activates the hitch assembly to engage and disengage the bottom end of the marine riser. The control panel also has a hydraulic fluid pressure receptacle for coupling via a remote-controlled underwater vehicle for use under water.
    [008] Another embodiment of the present invention provides a system for connecting a lower marine riser assembly (LMRP) to a marine riser. Again, the LMRP and BOP will be installed under water in a wellhead so that the riser extends from the wellhead to a drilling rig located on a marine surface. The system comprises a plurality of coupling members, a coupling assembly and a control panel. These engagement members are movable between a radially inwardly engaged position and an outwardly radially disengaged position. The hitch assembly is configured to drive the hitch members between the engaged and disengaged positions. A reduction riser joint is inserted into the drill riser adapter and has an upper end that attaches to the riser. The reduction riser joint has a lower end profile to join with the coupling assembly when the coupling assembly is in the engaged position. The control panel communicates to the hitch assembly and activates the hitch assembly to engage and disengage the bottom end of the marine riser. The control panel includes a hydraulic fluid pressure receptacle for coupling by means of an underwater remote control (ROV) vehicle to supply hydraulic fluid pressure to the coupling assembly.
    [009] Yet another embodiment presented provides a method for disconnecting a lower marine riser joint from a lower marine riser assembly. The method begins by providing a marine riser adapter that has a hydraulically driven hitch assembly and a control panel with a hydraulic fluid pressure receptacle. Then, the method connects the adapter to the LMRP. One end of a tubular riser unit is then inserted into a central hole in the marine riser adapter. Then, the method provides hydraulic fluid to drive the coupling assembly engaged with the riser tubular unit. The LMRP, the marine riser adapter and the tubular riser unit are then lowered to an underwater location. An ROV then attaches a probe to the hydraulic fluid pressure receptacle and supplies hydraulic fluid to drive the hitch assembly to disengage the riser from the marine riser adapter.
    [010] In yet another embodiment, a system is provided to connect a lower marine riser assembly to a drilling rig located on a marine surface. The lower marine riser assembly (LMRP) must be located underwater in a wellhead. The system comprises a plurality of tubular marine riser units to extend between the drill rig and the LMRP, each marine riser joint having at least one end attachable to an adjacent marine riser joint. The system also includes a drill riser adapter to mount to the bottom marine riser assembly. The drill riser adapter has a hydraulically driven hitch assembly for selectively engaging and disengaging a bottom end of at least one marine riser joint from the plurality of tubular marine riser units. A control panel is mounted on the adapter and communicatively coupled to the coupling assembly. The control panel activates the hitch assembly to engage and disengage the bottom end of the marine riser. A receptacle for receiving hydraulic fluid pressure is mounted on the control panel for coupling by means of an underwater remote control vehicle (ROV). The ROV will supply hydraulic fluid pressure to the coupling assembly.
    [011] Another embodiment provides a system for connecting a lower marine riser set to a marine riser. Again, the lower marine riser assembly (LMRP) must be positioned under water in a wellhead so that the riser will extend from the LMRP to a drilling rig located on a marine surface. The system comprises a rash preventer (BOP) mounted on an upper end of the LMRP, and a drill riser adapter mounted on the BOP. The drill riser adapter has a hydraulically driven hitch assembly to selectively engage and disengage the bottom end of the marine riser, and a control panel mounted on the adapter. The control panel is communicatively coupled to the hitch assembly to activate the hitch assembly to engage and disengage the bottom end of the marine riser. The control panel includes a receptacle for receiving hydraulic fluid pressure so that an underwater remote control (ROV) vehicle can engage the control panel to supply hydraulic fluid pressure to the hitch assembly.
    [012] Yet another embodiment provides a method for connecting a marine riser joint to a marine riser adapter located in an underwater location. The method first comprises fitting a probe from a remote controlled underwater vehicle (ROV) to a hydraulic fluid pressure receptacle on a marine riser adapter that has a hydraulically driven hitch assembly and a control panel with a hydraulic fluid pressure. The method then delivers hydraulic fluid from the ROV probe to the hydraulic fluid pressure receptacle to drive the hitch assembly to disengage a first riser tubular unit from the riser adapter. Then, the first tubular riser unit is removed from the riser adapter, and a second tubular riser unit is arranged on the riser adapter. The method continues to fit the ROV probe into the hydraulic fluid pressure receptacle on the marine riser adapter, and then deliver hydraulic fluid from the ROV probe to the hydraulic fluid pressure receptacle to drive the hitch assembly to engage the second tubular riser unit to the riser adapter.
    [013] An advantage of the presented achievements is that the drilling riser adapter reduces the time needed to compose the connection between the LMRP / BOP assembly and the surface riser. Additionally, the featured drill riser adapter needs fewer operators to compose the connection. Embodiments of the present invention are useful for use with any type of riser connection, with the addition of a reduction joint between the drill riser adapter and the riser. In addition, the presented achievements provide a drill riser adapter that allows connection and disconnection of the LMRP riser / BOP set in an underwater environment through the use of remotely operated vehicles. This can be achieved in significantly less time and effort compared to prior art methods, to compose and break a riser from the wellhead assembly in an underwater environment.
    Brief Description of the Drawings [014] So that the way in which the functions, advantages and objectives of the invention, as well as others that will become apparent, are achieved and can be understood in more detail, a more particular description of the invention briefly summarized above can be taken as a reference for its achievements, which are illustrated in the attached drawings that form a part of that specification. It should be noted, however, that the drawings illustrate only one preferred embodiment of the invention and, therefore, should not be considered as limiting the scope of the invention, since the invention can admit other equally effective embodiments.
    [015] Figure 1 is a schematic representation of a drilling riser adapter in use in a subsea assembly.
    [016] Figure 2 illustrates a perspective view of the drill riser adapter of Figure 1, according to an embodiment of the present invention.
    [017] Figure 3 is a top view of the drill riser adapter in Figure 2.
    [018] Figure 4 is a schematic sectional view of a double-acting hydraulic cylinder in Figure 2, in a first position.
    [019] Figure 5 is a schematic sectional view of the double-acting hydraulic cylinder in Figure 2, in a second position.
    [020] Figure 6 is a partial sectional view of the drill riser adapter in an engaged position taken along tube 6-6 of Figure 3.
    [021] Figure 7 is a partial sectional view of a secondary hitch assembly of Figure 6, in an engaged position.
    [022] Figure 8 is a partial sectional view of the secondary hitch assembly of Figure 6, in a disengaged position.
    [023] Figure 9 is a partial sectional view of the drill riser adapter taken along tube 7-7 of Figure 3.
    [024] Figure 10 is a partial sectional view of the drill riser assembly in a disengaged position taken along tube 6-6 of Figure 3.
    [025] Figure 11 is a schematic representation of a hydraulic action system for the drilling riser adapter in Figure 2.
    Description of Embodiments of the Invention [026] The present invention will be described in more detail hereinafter with reference to the accompanying drawings illustrating embodiments of the invention. This invention can, however, be realized in many different ways and should not be construed as limited to the illustrated embodiments presented in this document. Instead, these achievements are provided so that this presentation will be detailed and complete and will fully convey the scope of the invention to a person skilled in the art. Similar numbers refer to similar elements from beginning to end, and the main notation, if used, indicates similar elements in alternative realizations.
    [027] In the following discussion, numerous specific details are presented to provide a detailed understanding of the present invention. However, it will be obvious to one skilled in the art that the present invention can be put into practice without such specific details. In addition, to a large extent, the details regarding drilling operations, drilling operations, general riser composition and disruption, and the like, have been omitted to the extent that such details are not considered necessary to obtain a complete understanding of the present invention. , and are considered to be within the skill of a technician in the matter.
    [028] Referring to Figure 1, a drill riser adapter 11 configured to connect a column of marine riser 17 to a lower marine riser and eruption preventer (BOP) 13 assembly is shown, which is, in turn, attached to an underwater wellhead or to an underwater Christmas tree 15 in the well. The marine riser column 17 extends upwards from the drill riser adapter 11 to a floating platform 19 and is supported in tension from the floating platform 19 by riser tensioners 21. The marine riser column 17 is provided with a series of tubular riser units 23 extending from the floating platform 19 to the lower marine riser assembly 13. The marine riser column 17 allows drill pipe 25 to be deployed from the floating platform 19 to the assembly of lower marine riser 13 and beyond, through wellhead 15 on the seabed through a central tube 27. Auxiliary tubes 29, located around the central tube of the marine riser column 17, can be used for purposes such as serving as strangle and kill tubes, to recirculate the drilling mud under an eruption preventer (BOP), in the event that the BOP prevents flow through the central tube 27. Production 31 allows the marine riser column 17 to connect to the drilling riser adapter 11. The reduction joint 31 has a profile on an outer diameter surface of the lower end of the reduction joint 31. The profile is configured to engage the drill riser adapter 11. An upper end of the reduction joint 31 is configured to engage the type of coupling used by riser tubular units 23. A person skilled in the art will understand that the upper end of the reduction joint 31 can be any configuration of suitable tubular unit so that the reduction joint 31 connects to the marine riser column 17. Similarly, one skilled in the art will recognize that alternative embodiments do not include the reduction joint 31.
    [029] Referring now to Figure 2, the drill riser adapter 11 can be a tubular member 33 that has a flanged lower end 35. The tubular member 33 can taper from an outer diameter of the tubular member 33 to a slightly larger diameter adjacent to the flanged lower end 35. The tubular member 33 defines a central hole 37 that has a geometric axis 38, and an internal diameter slightly larger than the outer diameter of the reduction joint 31 (Figure 1), allowing, thus, that a lower end of the reduction joint 31 is inserted into the central hole 37. The tubular member 33 also defines a shoulder 32 (Figure 6) within the central hole 37 next to an opening 127, so that a profile 133 of the reduction joint 31 can join with an engaging member 125 as described in more detail below with reference to Figure 6. As shown in Figure 2, the flanged lower end 35 defines a plurali hole 39. The holes 39 line up with the corresponding holes in an upper part of the lower marine riser assembly 13 (Figure 1) and are configured to receive screws (not shown) that will secure the drilling riser adapter 11 to the assembly lower marine riser 13. The fastening mechanism by screwing between the drilling riser adapter 11 and the lower marine riser assembly 13 is shown for reference. A person skilled in the art will understand that other fixation mechanisms, such as welding, locking etc., are contemplated and included in the presented achievements.
    [030] The drilling riser adapter 11 also includes a latch assembly 41, a remote control operation assembly 43, and an upper flange 45. The upper flange 45 extends from the outside of the riser adapter. perforation 11 close to, but axially less than, an upper rim 47 of the drilling riser adapter 11. The upper flange 45 defines a plurality of grooved openings 49 that extend from an upper flange rim 45 inwardly toward the tubular member 33. Slotted openings 49 are of a size and shape to accommodate cylinder rods, described in more detail below. The upper flange 45 also defines auxiliary grooved openings 53 that extend from an upper flange rim 45 inwardly towards the tubular member 33. The auxiliary openings 53 are generally larger than the grooved openings 49 and are of a size and format required to accommodate the auxiliary tubes 29. As shown in Figure 3, the upper flange 45 includes two auxiliary openings 53. One skilled in the art will understand that more or less auxiliary openings 53 are contemplated and included in the presented embodiments. In addition, the drill riser adapter 11 may include additional openings that extend from the upper flange rim 45, toward the tubular member 33 to accommodate other tubes or devices attached to the marine riser column 17.
    [031] Referring to Figure 2, hitch assembly 41 includes cylinder assemblies 55, and a cam ring assembly 57. Cylinder assemblies 55 mate with the upper flange 45 and extend from a lower surface of upper flange 45 towards lower flange 35. In the illustrated embodiment, six cylinder sets 55 are included. One skilled in the art will understand that more or less cylinder assemblies 55 can be included in the drilling riser adapter 11. The cylinder assemblies 55 are spaced circumferentially around the upper flange 45, so that each cylinder assembly 55 is equidistant from from the two adjacent cylinder sets 55. Each cylinder set 55 includes upper and lower support trays 59, 61, support rods 63 and a cylinder 65. A base 69 of each cylinder 65 is supported by a respective lower support tray 61. In the illustrated embodiment, cylinders 65 are positioned so that the extension stroke of each cylinder will extend towards rim 47 of tubular member 33, and the retraction stroke of each cylinder will contract at base 69 towards flange 35 .
    [032] In the exemplary embodiment, each lower support tray 61 is coupled to a respective upper support tray 59 with four support rods 63. One skilled in the art will understand that more or less support rods 63, or any other coupling system suitable that provides support for the base 69 of cylinder 65 is contemplated and included in the presented achievements. The support rods 63 have a lower threaded end that passes through the perforations in the lower support tray 61 and are secured by nuts that have a nominal force capacity sufficient to provide a reaction force to the force exerted against the lower support tray 61 by cylinder 65. Similarly, support rods 63 have an upper threaded end that passes through the perforations in the upper support tray 59 and are secured by nuts (not shown) that have sufficient nominal force capacity to provide a force reaction to the force exerted against the upper support tray 59 by cylinder 65. The upper support tray 59, in turn, engages the lower surface of the upper flange 45. In the illustrated embodiment, the perforations in the upper support tray 59 are align with threaded perforations (not shown) that extend inward from the bottom surface of the upper flange 45. The screws 67 pass through the holes in the upper support tray 59 and the screw in the corresponding threaded holes in the lower surface of the upper flange 45.
    [033] Referring to Figures 4 and 5, cylinders 65 are double acting hydraulic cylinders that include a base 69, a rod 71 and a piston head 70. The base 69 defines a chamber that has an opening at an upper end for the passage of the rod 71 from the inside of the base chamber 69 to the outside of the base chamber 69. The base 69 is sealed where the rod 71 passes from the inside to the outside of the chamber by any method of suitable sealing such as “O” ring elastomers or similar. The piston head 70 mates with a rod end 71 and comprises a geometric shape configured to substantially fill a width of the base chamber 69 and divides it into a lower chamber 68 and an upper chamber 72. A hydraulic fluid can flow from variable mode in and out of the upper and lower chambers 72, 68 via a hitch circuit 151 and an upper door 147 or, alternatively, via a release circuit 153 and a lower door 149. As shown in Figure 4, fluid will flow into chamber 68 through port 149 and, as chamber 68 fills, exerts a force on piston head face 70 which pushes piston head 70 and rod 71 out of base 69. In response , the hydraulic fluid in chamber 72 will flow out of port 147 until piston head 70 occupies the position shown in Figure 5.
    [034] In a similar operation, fluid will flow into chamber 72 through port 147 and, as chamber 72 fills, exerts a force on piston head 70. In response, the hydraulic fluid in chamber 68 will flow out of port 149 until the piston head 70 occupies the position shown in Figure 4. The piston head 70 seals to the inner surface of the base chamber 69, with any suitable sealing method, so that piston head 70 can cross between a position bottom, shown in Figure 4, to an upper position, shown in Figure 5. In this way, cylinder 65 will act to move rod 71 axially up and down. The action of the cylinders 65, in turn, causes the action of the cam ring assembly 57, described in more detail below.
    [035] Referring to Figure 2, the upper ends of the rods 71 extend through the grooved openings 49 and engage the cam ring assembly 57. The cam ring assembly 57 includes the cam ring 73 and secondary engagement sets 75. The cam ring 73 has an internal diameter slightly larger than the outer diameter of the tubular member 33, so that an inner diameter of the cam ring 73 can slidably engage the outer surface of the tubular member 33. The cam ring cam 73 includes cylinder coupling protuberances 77 that extend radially from a portion of the outer diameter of cam ring 73 close to and axially over cylinders 65. In the illustrated embodiment, each cylinder coupling protrusion 77 corresponds and is axially above a respective cylinder set 55, so that the number of cylinder coupling protrusions 77 corresponds to the number of cylinder sets 55. As shown, the protuberances Cylinder coupling spheres 77 are box-shaped protrusions with sufficient force to transfer the axial force exerted by cylinder assemblies 55 on cylinder coupling protrusions 77 to cam ring 73. One skilled in the art will understand that other formats for coupling protrusions of cylinder 77 are contemplated and included in the presented achievements. In addition, one skilled in the art will also understand that cylinder assemblies 55 and cam ring assembly 57 can be oriented with respect to each other, so that cam ring assembly 57 is axially below the cylinder assemblies 55 .
    [036] Referring to Figure 6, a partial cross section of the drilling riser adapter 11 is shown which illustrates additional components of the cam ring assembly 57. In the exemplary embodiment, each cylinder coupling protrusion 77 defines a perforation 79 that is extends from the lower surface of the cylinder coupling protrusion 77 next to the rod 71 to an upper surface of the cylinder coupling protrusion 77. The perforation 79 has a lower chamfer 81 that transits from the perforation 79 to the lower surface of the cylinder coupling protrusion 77 Chamfer 81 has a wider diameter on the lower surface of the cylinder coupling protrusion 77 and a narrower diameter on bore 79. Bore 79 also includes an upper bevel 85 that transitions from bore 79 to a recess 80 on an upper surface of the bore. protrusion cylinder coupler 77.
    [037] Similarly, rod 71 includes a chamfered surface 83 that passes rod 71 from a wider diameter at a lower end of rod 71 to a narrower diameter approximately equivalent to drilling diameter 79. An end of narrower diameter of the rod 71 fits into the perforation 79. The rod 71 has an adapter part 87 formed at an upper end of the rod 71 that has a smaller diameter than the perforation diameter 79. A rod lock 89 inserts into the recess 80 from the upper surface of the cylinder coupling protrusion 77. The rod lock 89 has a diameter substantially equivalent to the diameter of the recess 80 near the upper surface of the cylinder coupling protrusion 77 and a chamfered edge at a lower end of the rod 89 that rests on bevel 85 of bore 79. Rod lock 89 attaches to adapter part 87 of rod 71, thereby securing rod 71 to the protrusion cylinder coupler 77. One skilled in the art will understand that any suitable method for attaching adapter part 87 to rod lock 89 is contemplated and included in the embodiments presented. For example, the outer diameter surface of adapter part 87 can be threaded, and the inner diameter surface of rod lock 89 may have the equivalent thread that allows rod lock 89 to be screwed onto adapter part 87. In this way, the movement of the rod 71 can transmit in motion the cylinder coupling protrusion 77 and the cam ring 73 as described in more detail below.
    [038] The drilling riser adapter 11 may include a secondary hitch assembly 75 as described below. One skilled in the art will understand that the alternative embodiments of the drill riser adapter 11 may include secondary hitch assemblies other than those illustrated in this document, or the total secondary hitch assembly. Still referring to Figure 6, the secondary coupling assembly 75 includes a base member 91 that engages the upper surface of the cylinder coupling protrusion 77. In the illustrated embodiment of Figure 7, the base member 91 defines three chambers, a first chamber 93 near an outer end or radially outward from the base member 91 opposite the tubular member 33, a second chamber 95 near a center of the base member 91, and a third chamber 97 near the outside diameter of the tubular member 33 Each chamber has an opening for the adjacent chamber that allows mechanical communication between the chambers. Additionally, chamber 93 has an opening at the outer end of the base member 91 for mechanical communication with an object outside the chamber 93. Similarly, chamber 97 includes an opening at the inner end of the base member 91 next to a tubular member. 33 for mechanical communication between an object in chamber 97 and the tubular member 33.
    [039] A latch 99, comprising a substantially cylindrical member having a handle at a first end, inserts into chamber 93 from outside the base member 91. The handle end of latch 99 remains outside the member base 91 and chamber 93. A second end of latch 99 passes through chamber 93 and into chamber 95. A transmission rod 101, which has bushing ends 103, 105, resides in chamber 95. The transmission rod 101 substantially fills the height of the chamber 95. The transmission rod 101 is less than the length of chamber 95, which allows the transmission rod to move radially within the chamber 95. The bushing end 103 has an internal profile 107. A second latch end 99 comprises a profile equivalent to the internal profile 107. The second latch end 99 is inserted into the bushing end 103 and joins with internal profile 107, so that the lateral movement of the trin co 99 will cause the transmission rod 101 to move radially in response. A bushing end 105 defines a threaded opening for a screw or set screw 109. A spring pin 111 inserts into the bushing end 105 and is secured to the bushing end 105 by the set screw 109. The spring pin 111 moves radially in response to lateral movement by the transmission rod 101. The spring pin 111 passes from chamber 95 to chamber 97.
    [040] A clamp 113, which has an engaged and disengaged position, resides inside chamber 97. Clamp 113 has a latch end 114 which is less than the height of clamp 113. The end of latch 114 passes through an opening in chamber 97 to an outside of the base member 91 next to the tubular member 33. The opening is substantially the same height as the engaging end 114, but less than the height of the chamber 97, so that the opening define a shoulder 98. In this way, the engagement end 114 can protrude from the chamber 97, while the clamp 113 is prevented from the existing chamber 97 completely by the shoulder 98. The clamp 113 includes a recess 115 in an end opposite the engaging end 114 that protrudes from the chamber 97. The spring pin 111 is inserted into the recess 115 and is secured by a pin that passes through the perforation of the spring pin 111 and the gr fixation field 113. The recess 115 has a recess that defines a spring seat. A spring 117 surrounds the spring pin 111 and is placed between a side wall of the chamber 97, close to the chamber 95, and the spring seat of the recess 115. In the illustrated embodiment, the spring 117 pulls the clamp 113 to the engaged position .
    [041] Still referring to Figure 7, an upper end of the tubular member 33 defines a secondary engagement recess 119 next to the upper rim 47. In the exemplary embodiment, the secondary engagement recess 119 is substantially rectangular and extends from a external surface of the tubular member 33 inwardly towards the perforation 37. A secondary coupling member 121 engages the tubular member 33 in the secondary coupling recess 119, as with the screws shown. Secondary engagement member 121 substantially fills secondary engagement recess 119. Secondary engagement member 121 has an external profile configured to mate with the engagement end 114 of the clamp 113 and prevent the clamp 113 from the upward movement axially towards upper rim 47, when the clamp 113 engages the secondary coupling member 121. The profile may comprise parallel sawtooth grooves. In this way, the clamp 113 engages the tubular member 33 in the engaged position, providing secondary cam ring engagement 73 to the tubular member 33.
    [042] Secondary hitch assembly 75 has a engaged or locked position (Figure 7) and a disengaged position (Figure 8) and operates in the following manner. Latch 99 can be pulled radially away from the tubular member 33 by an operator or an underwater remote control (ROV) vehicle. The transmission rod 101 moves radially in response to the position shown in Figure 8. Similarly, the spring pin 111 pulls the clamp 113 radially away from the secondary engagement member 121 in response. In an exemplary embodiment, latch 99 is then rotated 90 degrees by an operator or ROV to engage key 123, turned on latch 99, with a shoulder 94, defined by a wall that separates chamber 93 from chamber 95. While that, in the engaged position of Figure 7, key 123 resides in the passage between chamber 93 and chamber 95. Key 123 extends from latch 99 to a height greater than the width of latch 99, thus, when latch 99 is pulled radially and turned 90 degrees, as shown in Figure 8, the side wall of key 123 will be supported on the shoulder 94 of the passage between chamber 93 and chamber 95. In this way, latch 99 prevents spring 117 from returning to securing clamp 113 to the engaged / stretched engaged position of Figure 7. Before attaching a riser end to hole 37 (Figure 6), securing clips 113 will be in the disengaged position as shown in Figure 10. The operation of the riser adapter of drilling 11 will be described more details below.
    [043] The cam ring assembly 57 has an engaged position illustrated in Figure 6, and a disengaged position illustrated in Figure 10. Referring to Figure 10, the cylinder rod 71 has been actuated to raise the cylinder coupling protrusion 77 from cam ring 73 to the disengaged position. In the disengaged position, the lower protruding surface of cylinder coupling 77, and consequently, the cam ring 73, is axially above the upper surface of a cam clamp 125. Cam clamp 125 resides in an opening 127 in the tubular member 33 axially close under the secondary coupling recess 119 and the secondary coupling member 121. Opening 127 extends from the outer surface of tubular member 33 through the side wall of tubular member 33 at perforation 37. An opening 127 is located in the tubular member 33 next to each cylinder coupling protrusion 77. A respective cam clamp 125 substantially fills each respective opening 127 and has a chamfer 129 in a far superior outer margin. The chamfer 129 is configured to support the corresponding chamfer 131 of cylinder coupling protrusion 77 when the cylinder coupling protrusion 77 moves from the disengaged position of Figure 10 to the engaged position of Figures 6 and 9. The part of each clamp of cam 133 below chamfer 129 tapers outward.
    [044] In operation, cylinders 65 will activate and pull rod 71 below base member 69 (Figure 1 and Figure 4). In response, the rods 71 will pull the cylinder coupling protrusion 77 and the cam ring 73 axially downward. Cylinder protrusion chamfer 131 of cylinder 77 will come in contact with chamfer 129 of cam clamp 125. As rod 71 continues to pull cylinder protrusion 77 protruding axially downward, chamfer 129 will slide along chamfer 131, exerting thus a force that moves the cam clamp 125 radially inwardly engaged with a grooved surface profile 133 of the reduction joint 31, as shown in Figure 6. In this way, the drill riser adapter 11 will engage the reduction joint 31 , attaching it to the lower marine riser assembly 13 of Figure 1. Each cam clamp 125 has a grooved profile on its inner side that engages the surface profile 133.
    [045] Referring now to Figure 2, the actuation of cylinders 65 of the cylinder assemblies 55 can be controlled by the remote control operation set 43. The remote control operation set 43 includes a control panel 141, a control door hot plug 135, a latch valve switch 137, and a release valve switch 139. In an exemplary embodiment, the control panel 141 engages tubular member 33 on the top flange 45. Hot plug port 135, the hitch switch 137, and release switch 139 attach to control panel 141 which faces away from tubular member 33 so that an underwater remote control (ROV) vehicle can insert a hot fit into the hot dock 135 to supply hydraulic fluid pressure and manipulate switches 137, 139 to control cylinder assemblies 55. In an exemplary embodiment, the hot plug port 135 may comprise a receptacle hot plug or hydraulic fluid pressure receptacle configured to receive hydraulic fluid pressure from an external source in the hydraulic systems of the drill riser adapter 11. Similarly, the hot plug is a mechanism for supplying fluid pressure hydraulic external to the drilling riser adapter system 11.
    [046] Switches 137, 139 connect to control valve stems 143, 145 (Figure 11) respectively. Manipulation of switches 137, 139 will manipulate flow through valves 143, 145 in response. In the illustrated embodiment, the hot plug port 135, and valves 143, 145 are communicably coupled via hydraulic tubes (schematically shown in Figure 11) to the upper and lower ports 147, 149 of cylinders 65. The fluid that passes through the hydraulic tubes it will flow through upper and lower doors 147, 149 to drive the cylinders 65 by exerting a force on the piston head 70 coupled to the rod 71. A hydraulic coupling circuit 151 communicates coupled to the doors 147, valve 143, and switch 137. A communicable hydraulic release circuit 153 is coupled to ports 149, valve 145, and switch 139.
    [047] In a technical example of the drilling riser adapter 11 trip, the drilling riser adapter will be attached in line to a marine riser as shown in Figure 1 and is located on the seabed. The components of the drilling riser adapter 11 will be in the positions illustrated in Figure 2, Figure 4, Figure 6, and Figure 7. As described in this document, the operation of the drilling riser adapter 11 will be described using the reduction joint 31 with profile 133. One skilled in the art will appreciate that the drill riser adapter 11 can attach directly to a riser tubular unit that has a suitable profile without the need for the reduction joint 31. An ROV will first contain each latch 99 in row and will pull it radially away from tubular member 33.
    This will release each clamp 113 from the engagement with the secondary engagement member 121. After pulling each latch 99 radially, and before moving to the next latch 99, the ROV will turn the latch 99 ninety degrees, thus engaging the key 123 with the shoulder 94 of the base member 91 as illustrated in Figure 8 and Figure 9.
    [048] After disengaging each latch 99, the ROV can fit a hot fitting to the hot fitting port 135. Valves 143, 145 will be closed, preventing the flow of hydraulic fluid through or coupling circuit 151 or disengagement circuit 153 The ROV can then manipulate the switch 139 to open the valve 145 and allow the hydraulic fluid to pump through the ROV, hot plug 135, valve 145 and in the release circuit 153. The hydraulic fluid will then flow through the disengage 153 and ports 149 below piston head 70. As fluid pressure is intensified below piston head 70, the resulting pressure will force piston head 70 and rod 71 upward, thereby increasing coupling protrusions from cylinder 77 and cam ring 73. When rods 71 reach their longest stroke, as shown in Figure 10, the ROV will manipulate switch 139 to close valve 145 and stop the flow through via the release circuit 153. The internal pressure in the release circuit 153 will keep the cam ring 73 and the cam ring assembly 57 in the disengaged position. Operators on platform 19 will then pull the riser further by manipulating the operating equipment on platform 19. This will cause profile 133 to slide upward after hitch member 125, forcing hitch member 125 to move radially outward and allowing removal of the reduction joint 31.
    [049] Similarly, in a technical example of the drill riser adapter hitch 11, the drill riser adapter 11 will be coupled to an underwater wellhead assembly 13 as shown in Figure 1 and is located at the bottom of the sea. In an exemplary embodiment, the riser 17 has been damaged and removed from the drill riser adapter 11 as described above and a new riser 17 is to be attached to the drill riser adapter instead. The drill riser adapter components 11 will be in the positions illustrated in Figure 5 and Figure 8. In an exemplary embodiment, the reduction joint 31 engages the riser end 17. An ROV will guide the reduction joint 31 at the riser end 17 in the perforation 37 of the tubular member 33 until it occupies the position shown in Figure 10.
    [050] The ROV can then fit a hot fitting to the hot fitting port 135. Valves 143, 145 will be closed, preventing the flow of hydraulic fluid from passing through either the coupling circuit 151 or the release circuit 153. The ROV can then manipulate the switch 137 to open the valve 143 and allow the hydraulic fluid to pump through the ROV, hot plug port 135, valve 143 and in the coupling circuit 151. The hydraulic fluid will then flow through the coupling circuit. 151 and ports 147 above piston head 70 (Figure 5). As a fluid pressure intensifies above piston head 70, the resulting pressure will force piston head 70 and rod 71 downward (Figure 4), thereby decreasing the cylinder coupling protuberances 77 and cam ring 73 ( Figure 9). When the rods 71 reach their weakest stroke, as shown in Figure 4, the ROV will manipulate the switch 137 to close the valve 143 and stop the flow through the coupling circuit 151. The internal pressure in the coupling circuit 151 will maintain the ring cam 73 and cam ring assembly 57 in the engaged position of Figure 9, securing the reduction joint 31 to the drilling riser adapter 11.
    [051] Subsequently, the ROV will operate the secondary hitch assemblies 75 to provide a reserve hitch mechanism. The ROV can first hold each latch 99 in a row and turn each latch 99 ninety degrees, thus releasing the key 123 from the shoulder 94 of the base member 91. The ROV can then release latch 99, allowing spring 117 to move the clamp attachment 113 radially in engagement with engagement member 121 as shown in Figure 6 and Figure 7. Optionally, the ROV can assist spring 117 to move latch 99 radially towards tubular member 33 by inducing attachment clamp 113 into engagement with the secondary coupling member 121.
    [052] In a similar manner, the drilling riser adapter 11 can attach to the reduction joint 31 while the drilling riser adapter 11 and the reduction joint 31 are on the platform 19 before the wellhead assembly operation in the underwater location. The drilling riser adapter components 11 will be in the positions illustrated in Figure 5, Figure 8, and Figure 10. An operator will guide the reduction joint 31 in drilling 37 of the tubular member 33 with suitable platform tools to the reduction joint 31 occupy the position shown in Figure 10.
    [053] The operator can then attach a hydraulic tube to the hot fitting port 135. Valves 143, 145 will be closed, preventing the flow of hydraulic fluid from passing through either the coupling circuit 151 or the release circuit 153. The operator can then manipulate switch 137 to open valve 143 and allow hydraulic fluid to pump through the hydraulic tube, hot plug port 135, valve 143 and into coupling circuit 151. The hydraulic fluid will then flow through the control circuit. engage 151 and ports 147 above piston head 70 (Figure 5). As the fluid pressure intensifies above the piston head 70, the resulting pressure will force the piston head 70 and the rod 71 downward (Figure 4), thereby decreasing the cylinder coupling protuberances 77 and the cam ring 73 ( Figure 9). When the rods 71 reach their weakest stroke, as shown in Figure 4, the operator will manipulate the switch 137 to close the valve 143 and stop the flow through the coupling circuit 151. The internal pressure in the coupling circuit 151 will maintain the ring cam 73 and cam ring assembly 57 in the engaged position of Figure 7, securing the reduction joint 31 to the drilling riser adapter 11.
    [054] Subsequently, the operator will manually operate the secondary hitch assemblies 75 to provide a reserve hitch mechanism. The operator can first contain each latch 99 and turn latch 99 ninety degrees, thereby releasing key 123 from shoulder 94 of base member 91. The operator can then release latch 99 allowing spring 117 to move clamp 113 radially in engagement with secondary engagement member 121m as shown in Figure 6 and Figure 7. Optionally, the operator can assist spring 117 by moving latch 99 radially towards tubular member 33 by inducing clamp 113 in engagement with member secondary hitch 121.
    [055] Consequently, the disclosed achievements provide numerous advantages in addition to the prior art riser adapters. For example, the drill riser adapter revealed in this document provides a way to break into a connection between the LMRP / BOP and the riser, since the LMRP / BOP assembly is on the undersea. Thus, where emergency events require the ability to quickly disconnect an existing riser from the riser adapter and then reconnect a new riser or other device, the revealed punch riser adapter provides a means to do so.
    [056] In addition, the revealed achievements provide a drill riser adapter that can be used with any type of tubular riser unit with the addition of a suitable reduction joint that is easier and faster to attach to the riser. The drill riser adapter accomplishes this with less manpower required, while also providing a backup system to ensure that the riser does not disconnect from the BOP until an operator specifically wishes to release the LMRP / BOP riser.
    [057] It is understood that the present invention can accept many forms and embodiments. Consequently, several variations can be made in the background without departing from the spirit or scope of the invention. Thus, in the present invention by reference to certain preferred embodiments, it is noted that the disclosed embodiments are illustrative rather than limiting in nature and that a wide range of variations, modifications, alterations, and substitutions are contemplated in the foregoing disclosure and, in some instances , some functions of the present invention can be employed without corresponding use of the other functions. Many such variations and modifications may be considered obvious and desirable by a person skilled in the art based on a review of the foregoing description of preferred embodiments. Consequently, it is appropriate that the appended claims are constructed in a general manner and in a manner consistent with the scope of the invention.
    Claims
    权利要求:
    Claims (10)
    [1]
    1. SYSTEM FOR CONNECTING A LOWER MARINE RISER SET (13) TO A MARINE RISER (17), the lower marine riser set (13) being installed submerged in a wellhead so that the riser (17) is extended from the lower marine riser assembly (13) to a drilling rig (19) located on a marine surface, the system being characterized by comprising: a drilling riser adapter (11) for mounting to the riser assembly lower marine (13) and which has a hydraulically driven coupling assembly (41) to selectively engage and disengage a lower end of the marine riser (17); a reduction riser joint (31) that has a lower end profile (133) to selectively match the hitch assembly (41) when the hitch assembly (41) is in the engaged position and an upper end connection assembly selectively connected to the riser (17); a control panel (141) mounted on the adapter (11) and communicably coupled to the hitch assembly (41) to drive the hitch assembly (41) to engage and disengage the lower end of the marine riser (17); and a receptacle (135) for receiving hydraulic fluid pressure on the control panel (141) for engagement by a remote controlled underwater vehicle for supplying hydraulic fluid pressure to the engagement assembly (41).
    [2]
    SYSTEM, according to claim 1, characterized in that the drilling riser adapter (11) comprises: a tubular member (33) that defines a central hole (37) that has a geometric axis (38); the central hole (37) which has an internal diameter larger than an outside diameter of the lower end of the riser (17) so that the lower end of the riser (17) can be inserted into the central hole (37); a plurality of openings (127) at an upper end of the tubular member (33) close to a rim (47) of the tubular member (33); the openings (127) extend from an outer diameter surface of the tubular member to the central hole (37); a plurality of coupling members (125), each coupling member (125) filling a respective opening (127); the movable engagement members (125) between a radially inwardly engaged position and a radially outwardly disengaged position; and the hitch assembly (41) configured to drive the hitch members (125) between the engaged and the disengaged position.
    [3]
    SYSTEM, according to claim 2, characterized in that each of the coupling members (125) has a profile for engaging the corresponding profile (133) on an external surface of the lower end of the riser (17).
    [4]
    4. SYSTEM, according to claim 2, characterized in that the coupling assembly (41) comprises: an axially movable cam ring (73) that limits the upper end of the tubular member (33) close to the coupling members (125), the cam ring (73) having an internal surface that slidably engages the external surfaces of the engaging members (125); and a plurality of hydraulic cylinders (65) for moving the cam ring (73) axially over the surface of the tubular member (33).
    [5]
    5. SYSTEM, according to claim 4, characterized in that the coupling assembly (41) further comprises: a plurality of cylinder coupling protuberances (77) extending radially from an outside diameter portion of the cam ring (73 ); a flange (45) formed in a part of the tubular member (33) axially below the cam ring (73); and each cylinder (65) having a first end mounted on the flange (45) and a second end coupled to a respective cylinder coupling protrusion (77) to exert an axial force on the cam ring (73).
    [6]
    6. SYSTEM, according to claim 4, characterized by the coupling assembly (41) further comprising: a fixing clamp (114) coupled to the cam ring (73), the fixing clamp (114) being radially oriented inward to an engaged state; a lever (99) coupled to the clamp (114) to move the clamp (114) between the engaged state and a disengaged state; and an inner end of the fixing clamp (114) configured to engage a grooved outer surface of the tubular member (33) in the engaged state.
    [7]
    7. SYSTEM, according to claim 6, characterized in that it also comprises a key (123) formed on a latch surface (99) and configured to lock the fixing clamp (114) in a disengaged state when pulled radially and rotated by the remote controlled submarine vehicle.
    [8]
    8. SYSTEM, according to claim 1, characterized in that it further comprises: a latch (75) that selectively locks the coupling assembly (41) in an engaged position; and a handle (99) on the latch (75) configured to be engaged and to be handled by the remote controlled underwater vehicle.
    [9]
    9. SYSTEM, according to claim 1, characterized in that it also comprises a pair of valves (143, 145) in the control panel (141) to direct the pressure of hydraulic fluid to engage and release the coupling assembly (41 ) from the bottom end of the marine riser (17), the valves (143, 145) being configured to be engaged by the remote controlled underwater vehicle.
    [10]
    10. SYSTEM FOR CONNECTING A LOWER MARINE RISER SET (13) TO A MARINE RISER (17), the lower marine riser set (13) being installed submerged in a wellhead so that the riser (17) is extended from the lower marine riser assembly (13) to a drilling rig (19) located on a marine surface, where the system is characterized by comprising: an eruption preventer (13) mounted on an upper end of the assembly of bottom marine riser (13); a drill riser adapter (11) for mounting on the eruption preventer (13) and which has a hydraulically driven hitch assembly (41) for selectively engaging and disengaging a lower end of the marine riser (17); a reduction riser joint (31) that has a lower end profile (133) to selectively match the hitch assembly (41) when the hitch assembly (41) is in the engaged position and an upper end connection assembly selectively connected to the riser (17); a control panel (141) mounted on the adapter (11) and communicably coupled to the hitch assembly (41) to drive the hitch assembly (41) to engage and disengage the lower end of the marine riser (17); and a receptacle (135) for receiving hydraulic fluid pressure on the control panel (141) for engagement by a remote controlled underwater vehicle for supplying hydraulic fluid pressure to the engagement assembly (41).
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    同族专利:
    公开号 | 公开日
    GB2488648A|2012-09-05|
    NO343758B1|2019-06-03|
    CN102678082A|2012-09-19|
    AU2012201215A1|2012-09-20|
    US20120222865A1|2012-09-06|
    US8746349B2|2014-06-10|
    MY165791A|2018-04-25|
    SG183647A1|2012-09-27|
    GB201203404D0|2012-04-11|
    GB2488648B|2017-08-02|
    BR102012004559A2|2014-01-28|
    NO20120213A1|2012-09-03|
    CN102678082B|2017-03-01|
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    法律状态:
    2014-01-28| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-01| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-02-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-03-10| 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 29/02/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/038,044|2011-03-01|
    US13/038,044|US8746349B2|2011-03-01|2011-03-01|Drilling riser adapter connection with subsea functionality|
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