JPH01500207A - Riser pipe support device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] TLP marine elevator tension device Technical field The present invention relates to a technology for offshore oil drilling and crude oil production, in particular a tension leg platform. This relates to a marine elevator tensioning device used for transportation.

Background of the invention In recent years, great efforts have been made to explore underwater oil fields and pump crude oil from them. It's getting worse. The Gulf of Mexico and the North Sea are examples of such major efforts. This is a typical regional example.

In order to effectively explore and pump out these underground oil reserves, many technologies have been developed. The investigation is being watched closely.

One of the recent developments is the tensile There is a leg platform.

Tension leg platforms (commonly referred to as TLPs) are large semi-submersible excavators. It has a 70-ting structure similar to a rig. This 70-ting structure extends vertically. It is connected to the underlying template on the bottom of the water via a mooring line that extends. The buoyancy of TLP is Obtained from struts, floats, or similar structures. TLP The mooring line can be kept under tension under all weather and load conditions. It has enough buoyancy to float.

During the drilling operation and crude oil production stage, “between the underwater template and the TLP” Three independent marine elevator systems are typically used to exchange fluids. It is also used in elevators for shipping crude oil. The elevator is mounted on a template set at the bottom of the water. attached and extending toward the TLP. Movement of the water surface also causes weather changes Therefore, when the TLP moves, take care to prevent the elevator from breaking due to its own weight. It is necessary to keep the tensile force applied to the elevator constant.

Until now, the active Hydropneumatic systems have been used. An example of the use of such a system is M. ) Mr. L. Frein and Mr. F. L. It is described in a report titled ``LP Elevator Tension Device System''. child The tensioning device described in the document incorporates a hydraulic actuator.

The hydraulic actuator strokes up and down in accordance with the movement of the TLP, and It is adapted to apply a relatively constant pulling force to the elevator. This system has many There are some problems. i.e. continuously supplying high pressure fluid to perform the operation. One of them is that it is a necessary active system. Therefore, this high pressure If a failure occurs that stops the fluid supply, the system will become inoperable.

Also, maintaining a constant desired pressure in the system requires complex and expensive control systems. must be used. Therefore, an improved tensile device without these drawbacks systems are needed.

Summary of the invention According to one form of the invention, the elevator tensioning device is connected to the vessel from the tensioning leg platform. It is used to maintain a constant tensile force on the elevator. tensile leg placket The platform is adapted to move relative to the marine elevator. elevator tension device , the tension leg platform and the marine elevator are connected to each other, and the tension leg platform It is important to keep the tensile force of the marine elevator constant when the motor moves relative to the marine elevator. Equipped with an elastic assembly that can be used.

According to another form of the invention, the resilient assembly is operatively connected to the tension leg platform. a first plate assembly and a second plate assembly operably connected to the elevator; and a plate assembly. The elastic pad assembly is sheared and pulled into the elevator. A force-applying connection is made between the first and second plate assemblies. elastic pad The assembly includes a plurality of elastic pads separated by rigid plates. be able to. Connect the plate assemblies of the two elastic assemblies and connect the tension leg platform. It is also possible to increase the amount of movement of the elevator relative to the room. Also includes elastic pad assembly can be joined to both sides of the plate assembly to increase the tensile strength.

According to another aspect of the invention, the resilient assembly is elastically torsionally deflected about a torsional axis. It has an elastic element that can be shaped. The first torque arm is an elastic fixed to one end of the element and at a point spaced from the torsional axis. operatively connected to the elevator. The second torque arm the tension leg platform at a point spaced from the torsional axis. operatively connected to the system.

The elastic elements are separated by and connected to rigid interconnecting parts. It can be constructed from a plurality of elastic discs joined together. The tension device has a pair A resilient assembly is used to adjust the force acting between the elevator and the tension leg platform. The first torque arm of one elastic assembly is connected to the second torque arm of another elastic assembly through a structure that connects the first torque arm of one elastic assembly to the second torque arm of another elastic assembly. Can be fixed to the torque arm. Also, the amount of torsional deformation of the pair of elastic assemblies is It is also possible to provide an equal structure.

According to another form of the invention, the elastic assembly comprises a cylinder having an opening at one end. , and a piston extending into the interior of the cylinder through the opening. Sirin The piston is pivotally connected between the pulling leg platform and the marine lifting sieve machine. It is. The structure forms a support surface for the piston and a support surface for the cylinder, both of which A resilient assembly is supported between the support surfaces. The elastic assembly slides along the piston. a first piston ring that is rideable and slidable along the interior of the cylinder; a first cylinder ring and a second piston ring slidable along the piston; It is equipped with There is a bullet between the first piston ring and the first cylinder ring. The sex cones are joined. This elastic cone also has rigid interconnecting links. It is constructed by joining a series of elastic rings together using a ring. Also Similar elastic cones are placed in a first shell with the interiors of the cones facing each other. It is joined between the cylinder ring and the second piston ring. Therefore the elastic assembly can maintain the tension force Va in the elevator by shearing the elastic cone. Ru. In another embodiment, the cylinder and piston are omitted and the elastic The cones are combined to provide a tensile force of 710 to the marine elevator.

Brief description of the drawing A thorough understanding of the present invention may be obtained by reference to the following detailed description taken in conjunction with the accompanying drawings. Can be done. In the drawings, Figure 1 shows a marine elevator on a pulling platform. 1 is a perspective view showing a first embodiment of the present invention applying a tensile force; FIG.

FIG. 2 is a side view of the first embodiment.

FIG. 3 is a plan view of the first embodiment.

FIG. 4 shows a second implementation of the invention using an elastic element subjected to torsional shearing. It is a perspective view showing an example.

FIG. 5 is a modification of the second embodiment.

FIG. 6 shows a third embodiment of the invention with inverted interlocking elastic cones. FIG.

FIG. 7 is a plan view of the third embodiment.

Figure 8 shows inverted interlocking elastic circles in the piston and cylinder arrangement. FIG. 4 is a side view of a fourth embodiment of the invention incorporating a cone;

detailed description See drawings. Used throughout the various drawings, especially Figures 1 to 3. Identical reference symbols in the same paragraph refer to the same or corresponding parts. Drawings include books A marine elevator tensioning device 10 is shown in accordance with a first embodiment of the invention. this ship The elevator tensioning device 10 is designed so that the tensioning leg platform 14 is free from the effects of wave motion, weather and other factors. In order to maintain the minimum tensile force on the marine elevator 12 when moving due to factors. It has become. The marine elevator tension device 10 has a tension leg platform 14 for marine use. 6 feet in both directions from the normal or equilibrium level for the elevator 12) 1,83 meters) can move vertically, and platform 14 can be used for ships. When tilting at an angle of about 10 degrees perpendicular to the elevator 12, Desired tensile force, e.g. 50 to 500 xtps (22,68) to 226.8 It is possible to maintain a tensile force in the range of

The tensioning device 10 is attached to the deck 16 of the platform 14, and the tensioning device main The main part protrudes downward from the deck through a hole in the deck. Said Noboru Descending aircraft 12 passes through this hole in the deck. The tension device 10 is connected to the elevator 12. a gimbal assembly 18 for coordinating the pivoting motion of the platform 14; Pulling the elevator 12 while the platform 14 is moving vertically relative to 12 and an elastic assembly 20 that maintains the same condition.

Gimbal assembly 18 includes an upright arm 22. This arm is deck 1 6, and is capable of pivoting about the horizontal axis 26. can. A second gimbal ring 28 is pivotally attached to the first gimbal ring. and can pivot about a horizontal axis 30 perpendicular to the horizontal axis 26.

Rollers 31 provided on the ring 28 support the elevator, but the platform 1 4 can be moved longitudinally relative to the elevator. Therefore, the gimbal assembly is Pivotal misalignment between the marine elevator and the platform can be eliminated.

Resilient assembly 20 is attached to second cymbal ring 28 . elastic assembly 20 are the same structures arranged at regular intervals in the radial direction around the elevator. It is equipped with four elastic units 32. Unit 32 has a second gimbal at the top It is supported by a ring, and its lower end is fixed to a base ring 34. color 3 6 is fixedly attached to the elevator 14. Color 36 is pace ring 34 The elevator is connected to the platform via four elastic units 32. The entire body is supported by a frame 14.

Each elastic unit 32 has a thread extending through the second gimbal ring 28. Equipped with a rod. The threaded part of the rod p3B is located above the second gimbal ring 28. It is equipped with a nut 40 located at the bottom. By rotating the nut 40, the lock The vertical position of the door 38 is changed, and the elastic element of the unit 32 is deformed. Thus, the necessary tensile force can be applied to the marine elevator 12. The threaded rod 38 is A clevis 42 for receiving a cross pin 44 is provided at the lower end. cross pin 44 is an upper plate assembly made by connecting the plates 48 to each other with screw fixing devices 53. It supports the solid body 46.

Each of the plates 48 constitutes a portion of the elastic region 54. Each region 54 is rigid. an elastic outer plate 48,56 and an inner plate 58, and an elastic pad 60. are glued between these plates to form an integral structure. This one-piece structure 48.56 and the play of the elastic pad 60 and the 58 so that it can be supported with shearing force applied to the pad along the contact surface between the It is configured.

As is clear from the drawing, the two upper elastic regions 54 are installed in parallel and also It is attached to the screw σrad 38 via a port 48. Each of the upper elastic regions 54 A portion of each plate 56 extends downwardly from the elastic region and It communicates with a pair of cooperating lower elastic regions 54 directly below the region. cooperation The elastic region plates 56 are connected to each other by a connector plate 62 and a fixture 64. connected. A pair of plates 48 under the elastic region [111K] also have screw fixings 5 They are connected to each other via 2. The base ring 34 supports the cross pin 68. This cross-bin connects the plates 48 of the lower elastic region 54. I'm holding it in place.

By installing four elastic units 32 around the ship elevator 12, The longitudinal movement of the tension leg platform 14 relative to the machine causes shear on the elastic pad 60. Balance is achieved by the deformation of these elastic pads under increasing forces. duty Although any number of units 32 may be used, the use of such units is so that the vector of the resultant force acting on the marine elevator is located on the central axis of the elevator. It is preferable to arrange the unit. Applying the desired tensile force of 7 Ja to the marine elevator Adjust the nut 40 to apply shear force to the elastic pad 60. , when the movement of the tension leg platform 14 with respect to the elevator 12 is balanced. A tensile force is applied to the elevator. The elastic assembly 20 is attached to the platform 1 4 moves in both directions based on the equilibrium point with respect to this elevator, the elastic pad 60 It can deform appropriately and maintain sufficient tensile force for the marine elevator. Plat Any misalignment between the platform 14 and the elevator 120 is resolved through the gimbal assembly 18. be able to.

The material constituting the elastic pad 60 should be selected to provide the required operating characteristics. can be done. Is the elastic pad 60 made of synthetic rubber material and/or natural bim material? It can also be manufactured from For example, a wide range of temperature changes can be expected during use. In this case, blended natural rubber is suitable. The elastic assembly can be the same, linear or non-linear 710 force and the deformation caused by this force. It can be manufactured by taking the relationship between the two into consideration.

Please refer to FIG. A second embodiment of the marine elevator tension device 100 according to the present invention is Illustrated. The marine elevator tensioning device 100 basically operates in the same way as the tensioning device 10. However, unlike the previous row where the shear force is applied to the pad by 7JO, the torsional shear force is applied to the pad. The difference is that the elastic material is arranged so as to add to the elastic material. Deformed joint 102 is mounted on the platform 14, and the deformation joint is raised? lI# It is equipped with a tube 104 through which m12 passes. The deformation joint 102 is The misalignment between the platform 14 and the elevator 12 is eliminated.

Slip joint installation requires that the tool 106 is securely fixed to the tube 104. Ru. In addition, when attaching the joint, the tool 108 is attached to the elevator 102 at a position above the tube 104. is firmly fixed. Attaching the elastic assembly 11 between the fittings 106 and 108 0 is attached and the platform 14 moves longitudinally relative to the elevator 12. , it is possible to apply a tensile force of 7JO to the elevator and keep the elevator in a pulled state.

The elastic assembly includes a pair of elastic units 112. Each elastic unit 11 2 looks directly at the upper elastic cylinder 114 and the lower elastic cylinder 116. upper bullet The torque cylinder 114 has a torque arm 118 which is connected to the The joint attachment is fixed to the pin 120 supported by the clevis 122 of the fixture 108. It is. The torque arm 118 is connected to a resilient disk 124 and a rigid interconnection device. The discs 126 are glued to one end of a continuous body in which the discs 126 are arranged alternately. Also the torque An arm 128 is attached to the opposite end of the continuum consisting of discs 124 and 126. has been done. The upper elastic cylinder 114 defines a torsion axis 130.

When the torque arm 118 deforms around the axis 130 relative to the torque arm 128, , it can be understood that the elastic disk 124 deforms when a torsional shear force is applied. Ru.

The lower elastic cylinder 116 has substantially the same structure as the upper elastic cylinder 114. Ru. Link 132 connects cylinders 114 and 116. The link 132 is A tube 134 is provided that passes through the center of each cylinder. individual chews The tube is attached to the cylinder so that it can rotate freely around the torsion axis. Ru. A cross spar 136 connects the ends of the tube 134 to each other and connects the cylinder 114. and 116 are twisted to keep their axes parallel and these cylinders parallel. .

A meshed gear ring 138 forms part of each cylinder's torque arm 128. ing. The end of the cylinder torque arm 128 is spaced apart from the torsion axis. They are connected to each other by variable length rods 138 at the positions.

Attachment to torque arm 128 allows adjusting the length of rod 138 between points. The elastic discs of the cylinders 114 and 116, which provide a tensile force to the marine elevator 12, A predetermined torsional shear force can be generated in the chain 124. platform 14 moves relative to the elevator 12, the elastic disk 124 moves against the cylinders 114 and 116. while deforming into a torsional shear state about the torsional axis 130 of the , the tensile force applied to the marine elevator can be kept constant. Meshing gear ring 1 38, the torque arm 118 of each cylinder 114 and 116 is is similarly displaced as the platform 14 moves relative to the elevator 12.

As a result, the elastic disk 124 is subjected to zero fatigue on average, and one of the cylinders is can prevent rapid wear and tear.

Two units 112 are used, and the unit is The entire load from 112 to 710 now acts along the central axis of the elevator 12. ing.

FIG. 5 illustrates a modification of the marine elevator tensioning device 100 illustrated in FIG. 4. Ru. In this variation, the torque arm 118 has elastic disks joined on both sides. 124, forming a dual upper elastic cylinder 142. same dual The lower elastic cylinder is attached to interlock with the upper elastic cylinder 142. There is. Also, between the elevator and the platform, there is a 90 degree angle from the elastic unit mentioned above. Two new elastic units 112 are installed at an angle of . This repair According to the positive example, although the size is slightly larger, it is better than the tension device 100 described above. It is also possible to maintain a large tensile force. Tensioning device to suit each application Various structures incorporating the 100 principles can be considered.

FIGS. 6 and 7 show a third embodiment of a marine elevator tensioning device 200 of the present invention. Illustrated. The marine elevator 12 passes through the cymbal assembly 202 and onto the platform. The deck 16 of the platform 14 extends upward.

A plate 204 is rigidly attached to the elevator above the deck 16.

Four elastic units 206 act between the plate 204 and the deck 16 to A tensile force is applied to the elevator, and the platform 14 is perpendicular to the elevator 12. It allows movement in the direction.

Each of the elastic cones 208 is composed of stacked elastic cones 208. ing. Each cone comes in pairs, with the open ends of two adjacent cones are in contact with each other, and the connected pairs of cones have opposite openings on both sides. Connect The paired cones connect the radially outer 11111 edges via the outer ring 210. has been done. The radially inner portions of the cone are connected by an inner ring 212. Ru. The inner rings 212 of adjacent cones that are not connected are connected to each other and stacked. The uppermost inner ring 212 is directed downward from the plate 2L14. The inner ring 212 at the bottom is attached to a ring 214 extending from the deck 1. 6 and is connected to an upstanding pin 216 provided at 6. of elastic cone 208 Each is constructed from a resilient ring assembly 218-2280. These elastic The radius of the ring gradually increases in the radial direction from the inner ring 212. The length gradually decreases from the side ring 212. Intermediate rigid ring 230 -238 is glued between adjacent elastic rings to form an integrated elastic cone are doing. As a result, as shown in FIGS. 6 and 7, the elastic cone is The length becomes sloped from 12 to the outer ring 210.

The marine elevator 12 includes a plate 204, a platform 14, and the elevator. 120 and the deck 16 between them can be adjusted to apply the necessary tensile force. can. Elastic rings 218-228 are elastically sheared and in equilibrium. It is possible to apply 8 tensile forces in 1 to 12 hours of lifting and lowering. Vertical orientation of platform 14 While the amount of deformation of the elastic ring changes due to the movement of Force can be kept constant.

Please refer to FIG. Fourth embodiment of the invention with a marine elevator tensioning device 300 is illustrated. Bracket 302 is securely secured to tension leg platform 14 has been done. The collar 31J4 is firmly attached to the elevator 12. Sirin The bracket 306 is pivotally attached to each bracket 302 by a pin 308. ing. A piston 310 is provided for each cylinder 306. this piston 310 is pivotally connected to collar 304 via pin 312. of piston 310 Mostly at the end of the cylinder 306 opposite to where the pin 308 is pivotally attached. It is located at the side and enters the interior of the cylinder 306 through an opening 314 . second A support surface, end surface 320 , extends into the end of cylinder 306 around opening 314 . formed on the side.

Resilient assembly 322 is disposed within cylinder 306. This elastic assembly is , between end surfaces 318 and 320 to exert a tensile force of 770 on marine elevator 12. It works like this. The elastic assembly 322 is made of a rubber material such as the one described above. 8. Consists of a series of interlocking elastic cone assemblies 324 having 210 and 212 has been done. Furthermore, the inner surface of the inner ring 212 and the outer surface of the outer ring 210 are , sliding movement along the outside of piston 310 and inside of cylinder 306, respectively. It is now possible to do so. For this reason, the platform 14 is connected to the elevator 12. , the first and second end surfaces 318 and 320 move toward each other. or moving away from each other, the bullets housed in the cylinder 306 The cone assembly 324 can be compressed or expanded, and the rings 210 and 212 can be compressed or expanded as needed. A sliding movement can be made along the stone and cylinder. piston 310 A number of resilient cone assemblies 324 are provided that interlock with each other over the length of the vessel. It can generate the amount of tensile force required for marine elevators. Preferably, A series of cylinders 306 and pistons interlock between the platform 14 and the elevator 120. 310 so that all pulling force vectors pass through the centerline of the elevator 12. be ignored.

A number of embodiments of the invention are illustrated in the accompanying drawings and described in the foregoing detailed description. However, the present invention is not limited only to these disclosed embodiments. stomach. Parts and elements may be changed in any way without departing from the spirit of the invention. can be modified and replaced.

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Claims (20)

[Claims] 1. This marine lift from a pulling leg platform geared to the marine lift In an elevator tension device used to maintain a constant tension force applied to a tension leg, It has a resilient assembly that connects the platform and the marine lift to each other, and has a tension leg platform. When the platform moves relative to the marine lift, the tension leg platform and the marine Elevator tension device that can apply force between the elevators and maintain a constant tension. 2. The resilient assembly further includes a first rigid member fixed to the tension leg platform. member and a second rigid member fixed to the marine elevator, the at least one Elastic pads are bonded between these rigid members, and the pads undergo shear deformation to carry the tensile forces. An elevator tensioning device according to claim 1, which can be added to a marine elevator. 3. The resilient assembly includes a first rigid member connected to the tension leg platform and a vessel. a second rigid member connected to the elevator, and the elastic disc is connected to the rigid member. The material is bonded between the An elevator tensioning device according to claim 1. 4. The resilient assembly includes a first rigid member coupled to a tension leg platform; a second rigid member connected to a marine elevator; a pair of interlocking elastic cones; The body is operatively connected between these rigid members to keep the elastic cone in shear and allow the vessel to 2. An elevator tensioning device according to claim 1, which applies a tensioning force to a commercial elevator. 5. This marine lift from a pulling leg platform that moves against the marine lift In an elevator tensioning device used to maintain a constant tensile force applied to a a first plate operatively connected to the tension leg platform; a second plate operatively connected to said elevator; at least one member bonded between the Has two elastic pads Elevator tension device. 6. Further, it has a plurality of elastic pads, the first of these pads being a second of these pads is joined to a first plate; and a second of these pads is joined to a second plate. furthermore, the intermediate plate is joined between adjacent elastic pads. 6. An elevator tensioning device according to claim 5. 7. Furthermore, the relative positions of the first and second plates are adjusted to provide a predetermined position on the marine elevator. 6. An elevator tensioning device according to claim 5, further comprising means for applying a tensioning force of . 8. The first and second plates and the elastic pad form an elastic region, and the The elevator tensioning device comprises a pair of elevator tensioning devices, the first one of the elastic regions being Lift tensioning according to claim 5, in which the plates of are fixed to each other. Device. 9. Furthermore, a new pair of elastic regions with second plates fixed to each other are added. the second plate of the first pair of resilient regions has a first plate of the second pair of resilient regions; An elevator tensioning system as claimed in claim 8, wherein the elevator tensioning system is rigidly attached to a seat. Place. 10. In addition, the Claim comprising a new set of elastic regions consisting of a first and second pair applying a tensile force. The elevator tensioning device according to item 9. 11. Furthermore, to eliminate the misalignment between the elevator and the tension leg platform 6. An elevator tensioning device according to claim 5, comprising means for:. 12. This marine lift from a tension leg platform that moves relative to the marine lift In the elevator tension device used to keep the tension applied to the machine constant, the first a torque arm and a second torque arm, with a screw between the torque arms. It seems that an elastic disk that deforms in torsional shear around the axis is joined. at least one elastic cylinder and said first elastic cylinder at a location spaced from the torsion axis. means for operatively coupling one torque arm to the tension leg platform; actuating a second torque arm on the marine elevator spaced apart from the torsional axis; such that the torsional shearing action of the elastic disk applies a tensile force to the marine elevator. An elevator tensioning device having an inverted means. 13. A plurality of elastic disks are installed in an elastic cylinder, and each of the disks is The first one is joined to said first torque arm and also the second one of these discs. is connected to said second torque arm, and there is a rigid Lift according to claim 12, in which certain intermediate discs are joined. Tension device. 14. further comprising a second elastic cylinder and said first and second elastic cylinders having parallel torsion axes; means for securing the second elastic cylinder and the torque arms of the respective cylinders; and means for coupling to the torque arm of another cylinder. 13. Elevator tensioning device according to clause 12. 15. The means for connecting the torque arm to said cylinder is adjusted to provide a resilient disc. By applying a predetermined torsional shearing force to the ship, tensile force can be applied to the marine elevator. An elevator tension device according to claim 14. 16. Furthermore, in order to keep the rotation of each cylinder constant around the torsion axis, 15. An elevator tensioning device as claimed in claim 14, comprising means. 17. This marine lift from a tension leg platform that moves relative to the marine lift In an elevator tensioning device used to maintain a constant tension on the machine, the radius Elastic assembly with interlocking elastic cones connecting the outermost parts of the direction and, A bullet is interposed between a portion of the tension leg platform and the marine elevator. and means for deforming the sexual assembly to apply a tensile force to the marine elevator. Elevator tension device. 18. Each of said elastic cones consists of halves connected to each other by a rigid ring. The elevator tensioning device according to claim 17, comprising a plurality of elastic rings having different diameters. Place. 19. The intervening means has an opening at an end and a first support surface inside the open end. a cylinder forming a cylinder and an end forming a second support surface therein; a piston that is at least partially inserted into the cylinder; A solid body is confined between the first and second support surfaces and supports the piston and the second support surface. The cylinder and cylinder are connected between the platform and the elevator. When the home moves, the piston moves back and forth within the cylinder. An elevator tensioning device according to claim 17. 20. In addition, multiple an elastic assembly, each elastic element being at the radially innermost portion; A rigid ring that slides along the piston and a radially outermost and a rigid ring that slides along the inside of the cylinder. 20. An elevator tensioning device according to claim 19.