Floating production storage and offloading (FPSO) deep sea stand pipe supporting device

Abstract

The utility model relates to a floating production storage and offloading (FPSO) deep sea stand pipe supporting device which comprises a stand pipe. The top supporting unit is arranged at the top of the vertical pipe; the auxiliary supporting unit is arranged at the bottom of the vertical pipe; the auxiliary supporting unit comprises a vertical pipe outer support, a connecting rod assembly and a connecting rod driving mechanism, the vertical pipe outer support is of an annular structure and arranged on the outer side of the vertical pipe in a sleeving mode, a plurality of through holes are formed in the vertical pipe outer support, one end of the connecting rod assembly is inserted into the through holes in a penetrating mode, and the other end of the connecting rod assembly is connected with the connecting rod driving mechanism. By means of the double supporting mode of the top supporting unit and the auxiliary supporting unit, movement of the vertical pipe in water can be restrained, the vertical pipe cannot be loosened due to underwater dynamic loads, and meanwhile the working water depth of the vertical pipe is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of marine oil and gas development, in particular to a FPSO deep-sea riser supporting device. Background Art

[0002] FPSO is a floating production storage and offloading vessel. FPSO is a large-scale offshore oil production base that separates oil and gas from the extracted oil, treats oily wastewater, generates power, provides heat, and stores and transports crude oil products. It integrates personnel accommodation and production command systems. Compared with other forms of oil production platforms, FPSO has the advantages of strong wind and wave resistance, wide adaptability to water depths, large oil storage / unloading capacity, and transferability and reuse. It is widely suitable for the development of deep sea, shallow sea areas and marginal oil fields far from the coast, and has become the mainstream production method for offshore oil and gas field development. As the only structure connecting the surface part and the underwater production system, the riser is an important part of the development of offshore oil and gas fields, especially in the development of deep-sea and ultra-deep-sea oil and gas fields. However, in the deep-sea environment, the weight of the riser in the water naturally increases sharply with the increase of water depth and water pressure. At the same time, the increase in the weight of the riser will also require a great increase in the tensioning force at the top of the riser, which brings serious problems to the applicability and economy of the riser. In addition, since the riser is connected to the surface floating production device, as the water depth increases, the huge underwater riser load will increase the dynamic load that the surface floating production device needs to bear, thereby increasing the construction and operation costs of the surface floating production device. Utility Model Content

[0003] To this end, the technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a FPSO deep-sea riser support device, which can constrain the movement of the riser in water through a dual support method of a top support unit and an auxiliary support unit, while greatly increasing the working water depth of the riser.

[0004] In order to solve the above technical problems, the utility model provides a FPSO deep-sea riser support device, comprising:

[0005] Riser;

[0006] A top support unit, sleeved on the top of the riser to support the top of the riser;

[0007] An auxiliary support unit is arranged at the bottom of the riser to provide auxiliary support to the bottom of the riser; the auxiliary support unit includes a riser outer support, a bolt sleeve, a connecting rod assembly and a connecting rod driving mechanism. The riser outer support is an annular structure, which is sleeved on the outer side of the riser. A plurality of through holes are arranged on the riser outer support. The bolt sleeve is arranged on the riser outer support through a fastener. One end of the connecting rod assembly is inserted into the bolt sleeve, and the other end of the connecting rod assembly is connected to the connecting rod driving mechanism. The connecting rod assembly is controlled by the connecting rod driving mechanism to extend out of the bolt sleeve, thereby supporting the side of the riser.

[0008] In one embodiment of the utility model, the connecting rod assembly includes a screw rod and a bolt sleeve; the bolt sleeve is fixedly arranged on the outer support of the vertical pipe, one end of the screw rod is arranged on the inner side of the bolt sleeve and the two are threadedly connected, and the other end of the screw rod is connected to the output end of the connecting rod driving mechanism.

[0009] In one embodiment of the utility model, the connecting rod drive mechanism includes a first hydraulic motor, a gearbox and a first drive shaft; the first hydraulic motor is connected to the gearbox, the gearbox is connected to one end of the first drive shaft, and the other end of the first drive shaft is connected to the screw.

[0010] In one embodiment of the utility model, the connecting rod drive mechanism includes a second hydraulic motor, a worm, a worm wheel and a second drive shaft, the output shaft of the second hydraulic motor is connected to the worm, the worm is meshed with the worm wheel, the worm wheel is connected to one end of the second drive shaft, and the other end of the second drive shaft is connected to the screw.

[0011] In one embodiment of the utility model, a flange is provided on the outer side of the bolt sleeve and the connecting rod driving mechanism, one end of the flange is connected to the outer support of the riser through a fastener, and an outer pressure plate is provided between the flange and the outer support of the riser; the other end of the flange is connected to the connecting rod driving mechanism through a fastener.

[0012] In an embodiment of the utility model, a return spring is sleeved on the locking rod.

[0013] In one embodiment of the utility model, the track is a sloped track. During the rotation of the locking ring, when the roller is located at a high position of the track, the locking wedge is out of contact with the side surface of the riser; when the roller is located at a low position of the track, the locking wedge descends and contacts the side wall of the riser to clamp the side surface of the riser.

[0014] In one embodiment of the utility model, the top support unit includes a support sleeve, a locking ring, a rotation drive mechanism and a locking wedge, the locking ring is arranged on the outer side of the support sleeve, and the locking ring is driven by the rotation drive mechanism to rotate along the support sleeve; the locking ring is provided with a plurality of arc grooves arranged at equal intervals, a track is installed above each of the arc grooves, and the locking wedge is arranged on the inner side of the support sleeve; the top of the locking wedge is connected to a locking rod, the locking rod is inserted into the arc grooves on the support sleeve and the locking ring, and rollers are connected on both sides of the end of the locking rod, and the rollers are against the track.

[0015] In an embodiment of the utility model, a return spring is sleeved on the locking rod.

[0016] In one embodiment of the utility model, the track is a sloped track. During the rotation of the locking ring, when the roller is located at a high position of the track, the locking wedge is out of contact with the side surface of the riser; when the roller is located at a low position of the track, the locking wedge descends and contacts with the side wall of the riser to clamp the side surface of the riser.

[0017] In one embodiment of the utility model, an underwater protective shell is provided on the outer side of the connecting rod driving mechanism.

[0018] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0019] The utility model discloses a FPSO deep-sea riser support device, in which a top support unit clamps the neck of the riser from different directions to control the height of the riser. After the top support unit is in place, an auxiliary support unit supports the riser from the bottom to prevent the riser from shaking. The double support mode of the top support unit and the auxiliary support unit can constrain the movement of the riser in water, so that the riser will not loosen due to underwater dynamic load during use, and at the same time greatly increases the working water depth of the riser. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0021] Figure 1 This is a structural schematic diagram of a FPSO deep-sea riser support device in a preferred embodiment of the utility model;

[0022] Figure 2 is a structural schematic diagram of an auxiliary support unit of a FPSO deep-sea riser support device in Embodiment 1;

[0023] Figure 3is a partial structural schematic diagram of an auxiliary support unit of the FPSO deep-sea riser support device in the second embodiment;

[0024] Figure 4 yes Figure 1 A schematic diagram of a partial structure of a top support unit of a FPSO deep-sea riser support device is shown;

[0025] Explanation of the reference numerals in the drawings in the specification: 1. riser; 2. top support unit; 21. support sleeve; 22. locking ring; 221. arc groove; 222. track; 23. locking wedge; 24. return spring; 25. roller; 26. return spring; 3. auxiliary support unit; 31. riser outer support; 32. through hole; 33. connecting rod assembly; 331. screw rod; 332. bolt sleeve; 34. connecting rod drive mechanism; 341. first hydraulic motor; 342. gearbox; 343. first drive shaft; 344. second hydraulic motor; 345. worm; 346. worm wheel; 347. second drive shaft; 348. two-position three-way valve; 349. ejector pin; 350. lever; 100. underwater protective housing; 101. manual adjustment mechanism; 102. pressure balancer. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Embodiment 1

[0028] Reference Figure 1 As shown, the FPSO deep-sea riser support device described in the utility model comprises: a riser 1; a top support unit 2, which is arranged at the top of the riser 1 and used to support the top of the riser 1; an auxiliary support unit 3, which is arranged at the bottom of the riser 1 and used to auxiliary support the bottom of the riser 1;

[0029] The auxiliary support unit 3 includes a riser outer support 31, a connecting rod assembly 33 and a connecting rod driving mechanism 34. The riser outer support 31 is an annular structure and is sleeved on the outer side of the riser 1. A plurality of through holes 32 are arranged on the riser outer support 31. One end of the connecting rod assembly 33 is inserted into the through hole 32, and the other end of the connecting rod assembly 33 is connected to the connecting rod driving mechanism 34. The connecting rod assembly 33 is controlled by the connecting rod driving mechanism 34 to extend out of the through hole 32, thereby supporting the side of the riser 1.

[0030] like Figure 2As shown, the connecting rod assembly 33 includes a screw rod 331 and a bolt sleeve 332; the inner wall of the bolt sleeve 332 is provided with an internal thread, and the screw rod 331 is provided with an external thread. One end of the screw rod 331 is arranged on the inner side of the bolt sleeve 332 and the two are threadedly connected, and the other end of the screw rod 331 is connected to the output shaft of the connecting rod driving mechanism 34. When the connecting rod driving mechanism 34 is started, the connecting rod driving mechanism 34 drives the rod 331 to rotate in the bolt sleeve 332, thereby realizing the horizontal position adjustment of the screw rod 331, and when the screw rod 331 passes through the through hole 32 of the stand pipe outer support 31, it realizes the support of the side of the stand pipe 1.

[0031] Preferably, the connecting rod driving mechanism 34 includes a first hydraulic motor 341, a gearbox 342 and a first driving shaft 343; the first hydraulic motor 341 is connected to the gearbox 342, the gearbox 342 is connected to one end of the first driving shaft 343, and the other end of the first driving shaft 343 is connected to the screw rod 331.

[0032] A manual adjustment mechanism 101 is provided on the outer side of the first hydraulic motor 341. In this embodiment, the manual adjustment mechanism 101 is a torque wrench. When the first hydraulic motor 341 cannot be started, the first drive shaft 333 can be twisted by the torque wrench to adjust the horizontal position of the screw rod 331.

[0033] In addition, a flange 35 is provided on the outer side of the bolt sleeve 332 and the connecting rod drive mechanism 34. One end of the flange 35 is connected to the vertical tube outer support 31 through a fastener, and the other end is connected to the gearbox 342 of the connecting rod drive mechanism 34 through a fastener; an external pressure plate 36 is provided between the flange 35 and the vertical tube outer support 31.

[0034] like Figure 4As shown, the top support unit 2 is sleeved on the top of the riser 1 to support the top of the riser; the top support unit includes a support sleeve 21, a locking ring 22, a rotation drive mechanism and a locking wedge 23, the locking ring 22 is arranged on the outside of the support sleeve 21, and the locking ring 22 is driven by the rotation drive mechanism to rotate along the support sleeve 21; the locking ring 22 is provided with a plurality of arc grooves 221 arranged at equal intervals, and a rail 222 is installed above each of the arc grooves 221, and the locking wedge 23 is provided on the inner side of the supporting sleeve 2; the top of the locking wedge 23 is connected to the locking rod 24, the locking rod 24 is inserted into the arc groove 221 on the supporting sleeve 21 and the locking ring 22, and the ends of the locking rod 24 are connected to rollers 25 on both sides, and the rollers 25 are against the track 222; when the locking ring 22 rotates, the rollers 25 at the ends of the locking rod 24 move on the track 222, so as to adjust the position of the locking wedge 23, so that the locking wedge 23 is in contact with and away from the riser 1.

[0035] Furthermore, a return spring 26 is sleeved on the locking rod 24 .

[0036] In this embodiment, the track 222 is a sloped structure. When the locking ring 22 rotates, if the track 222 squeezes the roller to move from the high position of the track 222 to the low position, the locking wedge 23 descends and contacts the side wall of the riser 1 to clamp the side of the riser 1. If the locking ring 21 is rotated in the opposite direction, the track 222 squeezes the roller to move from the low position to the high position, the locking wedge 23 is loosened and loses contact with the side of the riser 1.

[0037] The structure of the FPSO deep-sea riser support device is specifically used. After the riser 1 is put into place, the rotary drive mechanism is used to drive the locking ring 21 to rotate in the support sleeve 22, thereby driving the locking wedge 23 to descend. At this time, the return spring 24 pushes a plurality of locking wedges 23 evenly distributed around the riser 1 to the neck of the riser 1, and clamps the top of the riser 1 from different directions, which can ensure that the riser 1 will not loosen due to underwater dynamic loads during use. After the top support unit 2 is clamped in place, a plurality of first hydraulic motors 341 evenly distributed around the riser 1 in the auxiliary support unit 3 start to work, and push the connecting rod assembly 33 forward through the connecting rod drive mechanism 34, thereby realizing auxiliary support for the riser 1.

[0038] Embodiment 2

[0039] Reference Figure 1As shown, a FPSO deep-sea riser support device described in the utility model comprises: a riser 1; a top support unit 2, which is arranged at the top of the riser for supporting the top of the riser 1; an auxiliary support unit 3, which is arranged at the bottom of the riser 1 for auxiliary supporting the bottom of the riser 1; the auxiliary support unit 3 comprises a riser outer support 31, a connecting rod assembly 33 and a connecting rod driving mechanism 34, the riser outer support 31 is an annular structure, which is sleeved on the outer side of the riser 1, and a plurality of through holes 32 are arranged on the riser outer support 31, one end of the connecting rod assembly 33 is inserted in the through hole 32, and the other end of the connecting rod assembly 33 is connected to the connecting rod driving mechanism 34, and the connecting rod assembly 33 is controlled by the connecting rod driving mechanism 34 to extend out of the bolt sleeve 332, thereby supporting the side of the riser 1. In this embodiment, there are eight connecting rod assemblies 33 which are circumferentially arranged on the riser outer support 31 . Each connecting rod assembly 33 is equipped with a separate connecting rod driving mechanism 34 . The eight connecting rod assemblies 33 can realize multi-directional support for the riser 1 .

[0040] like Figure 2 As shown, the connecting rod assembly 33 includes a screw rod 331 and a bolt sleeve 332; the inner wall of the bolt sleeve 332 is provided with an internal thread, and the screw rod 331 is provided with an external thread. The screw rod 331 is arranged on the inner side of the bolt sleeve 332 and the two are threadedly connected, and the other end of the screw rod 331 is connected to the output shaft of the connecting rod driving mechanism 34. When the connecting rod driving mechanism 34 is started, the connecting rod driving mechanism 34 drives the screw rod 331 to rotate, and the screw rod 331 rotates and moves forward in the bolt sleeve 332, thereby realizing the horizontal position adjustment of the screw rod 331. When the screw rod 331 passes through the through hole 32 of the vertical pipe outer support 31, it realizes the support of the side of the vertical pipe 1.

[0041] like Figure 3 As shown, the connecting rod driving mechanism 34 includes a second hydraulic motor 344, a worm 345, a worm wheel 346 and a second driving shaft 347. The output shaft of the second hydraulic motor 344 is connected to the worm 345, the worm 345 is meshed with the worm wheel 346, and the worm wheel 346 is connected to the second driving shaft 347. The second hydraulic motor 344 controls the rotation of the worm 345, so that the worm 345 drives the worm wheel 346 to rotate; when the worm wheel 346 rotates, it drives the screw rod 331 to rotate, thereby controlling the horizontal position movement of the screw rod 331.

[0042] By adopting the meshing mode of the worm 345 and the worm wheel 346, the worm 345 transmits the rotational kinetic energy to the worm wheel 346 when rotating, thereby realizing power transmission; the friction is small and the noise is low during the transmission process, thereby reducing the operating noise of the mechanical equipment. Moreover, the transmission structure of the worm wheel 346 and the worm 345 is simple and has few parts, so it has a long service life and low maintenance cost, which can meet the long-term and high-intensity use requirements in industrial production.

[0043] In addition, a two-position three-way valve 348 is provided in the oil supply pipeline of the second hydraulic motor 344 for controlling the on-off of the hydraulic oil; a pin 349 is provided on the worm gear 346, and the two-position three-way valve 348 controls the on-off of the hydraulic oil through a lever 350. When the screw rod 331 retracts into place, the worm gear 346 is reset synchronously, and the pin 349 touches the lever 350, which triggers the two-position three-way valve 348 to cut off the oil supply to the second hydraulic motor 344.

[0044] Furthermore, an underwater protective housing 100 is disposed outside the connecting rod driving mechanism 34. A pressure balancer 102 is disposed inside the underwater protective housing 100 for balancing internal and external pressures.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A FPSO deep-sea riser support device, characterized in that: include: Riser; A top support unit, sleeved on the top of the riser to support the top of the riser; An auxiliary support unit is arranged at the bottom of the riser to provide auxiliary support to the bottom of the riser; the auxiliary support unit includes a riser outer support, a connecting rod assembly and a connecting rod driving mechanism, the riser outer support is an annular structure, sleeved on the outer side of the riser, a plurality of through holes are arranged on the riser outer support, one end of the connecting rod assembly is inserted into the through hole, the other end of the connecting rod assembly is connected to the connecting rod driving mechanism, and the connecting rod assembly is controlled by the connecting rod driving mechanism to extend out of the through hole to support the side of the riser.

2. The FPSO deep-sea riser support device according to claim 1, characterized in that: The connecting rod assembly includes a screw rod and a bolt sleeve; the bolt sleeve is fixedly arranged on the outer support of the vertical pipe, one end of the screw rod is arranged on the inner side of the bolt sleeve and the two are threadedly connected, and the other end of the screw rod is connected to the output end of the connecting rod driving mechanism.

3. The FPSO deep sea riser support device according to claim 2, characterized in that: A flange is provided on the outer side of the bolt sleeve and the connecting rod driving mechanism, one end of the flange is connected to the outer support of the riser through a fastener, and an outer pressure plate is provided between the flange and the outer support of the riser; the other end of the flange is connected to the connecting rod driving mechanism through a fastener.

4. The FPSO deep sea riser support device according to claim 2, characterized in that: The connecting rod driving mechanism includes a first hydraulic motor, a gearbox and a first driving shaft; the first hydraulic motor is connected to the gearbox, the gearbox is connected to one end of the first driving shaft, and the other end of the first driving shaft is connected to the screw.

5. The FPSO deep sea riser support device according to claim 2, characterized in that: The connecting rod drive mechanism includes a second hydraulic motor, a worm, a worm wheel and a second drive shaft, the output shaft of the second hydraulic motor is connected to the worm, the worm is meshed with the worm wheel, the worm wheel is connected to one end of the second drive shaft, and the other end of the second drive shaft is connected to the screw.

6. The FPSO deep sea riser support device according to claim 5, characterized in that: A two-position three-way valve is arranged in the oil supply pipeline of the second hydraulic motor to control the on-off of the hydraulic oil.

7. The FPSO deep-sea riser support device according to claim 1, characterized in that: The top support unit includes a support sleeve, a locking ring, a rotation drive mechanism and a locking wedge, wherein the locking ring is arranged on the outer side of the support sleeve, and the locking ring is driven by the rotation drive mechanism to rotate along the support sleeve; the locking ring is provided with a plurality of arc grooves arranged at equal intervals, a track is installed above each of the arc grooves, and the locking wedge is arranged on the inner side of the support sleeve; the top of the locking wedge is connected to a locking rod, and the locking rod is inserted into the arc grooves on the support sleeve and the locking ring, and rollers are connected on both sides of the end of the locking rod, and the rollers are against the track.

8. The FPSO deep sea riser support device according to claim 7, characterized in that: A return spring is sleeved on the locking rod.

9. The FPSO deep sea riser support device according to claim 7, characterized in that: The track is a sloped track. During the rotation of the locking ring, when the roller is located at a high position of the track, the locking wedge is out of contact with the side surface of the riser; when the roller is located at a low position of the track, the locking wedge descends and contacts with the side wall of the riser to clamp the side surface of the riser.

10. The FPSO deep sea riser support device according to claim 1, characterized in that: An underwater protective shell is arranged on the outer side of the connecting rod driving mechanism.

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