A pressure-resistant housing for riser monitoring and a fixing device thereof

Abstract

The present application relates to a kind of pressure shell for riser monitoring and its fixing device, which mainly includes pressure shell, first fixed support, second fixed support, throat hoop steel band. Wherein the reliability of pressure shell is improved by triple sealing of pressure shell. The design of core plate fixed by screw through sleeve and lower bottom surface of sleeve, clamping snap ring is fixed by buckle, and secondary fixing is guaranteed, so that the monitoring error of pressure sealing shell will not be increased due to relative motion between structures during monitoring operation. First fixed support is disassembled with second fixed support by the contraction of internal spring of stop pin, which is simple in structure, easy to operate, and enhances the quick convenience of installation and disassembly. Throat hoop steel band passes through the V-shaped plate of second fixed support, and the support is fixed on the riser before being lowered, which improves the flexibility and versatility of device installation. The present application can be widely applied in pressure shell and its fixing device for deepwater drilling riser monitoring.

Description

Technical Field

[0001] This invention relates to the field of marine oil and gas equipment, specifically to a pressure-resistant housing and its fixing device for monitoring risers. Background Technology

[0002] Deepwater drilling risers are crucial structures connecting offshore platforms to subsea wellheads, but they are also critical components susceptible to damage. Under cyclic dynamic loads from wind, currents, and waves, frequent vibrations of the riser can easily lead to fatigue damage and fracture failure, causing not only losses to the project itself but also potentially serious secondary hazards. Therefore, real-time monitoring of riser vibration is essential to ensure the safe and efficient exploitation of offshore oil and gas, providing data for fatigue analysis, risk warnings, and life assessments.

[0003] The harsh deep-sea environment places the hull and its fixing devices under constant high pressure, demanding high sealing reliability. Multiple complex loads can increase monitoring errors if the monitoring equipment is not securely fixed. Deep-water drilling riser monitoring cycles are short, and disassembly and assembly costs are high, necessitating rapid and convenient underwater assembly and disassembly of the monitoring equipment. However, existing riser monitoring equipment is often fixed using U-shaped clamps on a single bare riser section. Connecting the monitoring equipment to a larger buoyancy section using U-shaped clamps is cumbersome and complex, and the clamps cannot be reused when changing the riser diameter. Therefore, to address the problems of low reliability of existing riser monitoring pressure hulls, cumbersome underwater assembly and disassembly operations, large monitoring equipment errors, and poor versatility and limited applicability of fixing devices, providing a pressure hull and its fixing device for riser monitoring is of significant importance to this field. Summary of the Invention

[0004] This invention provides a pressure-resistant housing and its fixing device for monitoring risers, which is highly reliable, quick and convenient to assemble and disassemble underwater, versatile, and widely applicable.

[0005] This invention provides a pressure-resistant housing and its fixing device for monitoring water-proof pipes, comprising:

[0006] The system comprises a pressure-resistant shell, a first fixed bracket, a second fixed bracket, and a hose clamp steel band. The pressure-resistant shell is fixed to the first fixed bracket, the first fixed bracket is connected to the second fixed bracket, and the overall fixed bracket is fixed to the water-proof pipe by means of a V-shaped plate and a hose clamp steel band.

[0007] The pressure-resistant housing includes an outer shell, a left sleeve, a right sleeve, an end cap, a sealing ring, and a rubber gasket. The pressure-resistant outer shell is divided into upper and lower compartments. The upper compartment is the electronics compartment. Each sleeve has two through holes on its upper surface and four countersunk holes on its lower bottom surface, with a positioning block on each outer side. The left and right sleeves are assembled together and placed inside the electronics compartment through positioning grooves. The end cap includes four fixing cylindrical pins, one positioning cylindrical pin, and a sealing groove. The sealing groove can accommodate the sealing ring for axial sealing. The sealing ring is added again to the contact surface between the end cap and the outer shell to achieve radial sealing. Fixing and triple sealing are achieved through interference fit with the pressure-resistant housing. The fixing cylindrical pins pass through the through holes of the sleeves to fix the monitoring core board. The rubber gasket is placed inside the sleeves to fix the core board and prevent the fixing cylindrical pins from crushing the core board and electronic components. The positioning cylindrical pin of the end cap is assembled with the outer shell for positioning, eliminating repeated installation operations due to offset.

[0008] The first fixing bracket includes a T-block, a supporting sleeve, a clamping ring, a buckle, and a stop pin. The T-block is connected to the T-slot of the second fixing bracket and is fixed by self-tightening through the stop pin. The pressure-resistant housing can be placed in the supporting sleeve and the clamping ring for initial fixing, and the pressure-resistant housing is fixed a second time through the buckle.

[0009] The second fixed bracket includes a T-slot, a nail-stopping slot, a V-shaped plate, and a mounting slot. The T-slot is assembled with the T-block. The V-shaped plate is provided with mounting slots symmetrically distributed along the centerline. The hose clamp steel band can be passed through the mounting slots to fix the first fixed bracket, the second fixed bracket, the pressure-resistant shell, and the water-proof pipe together.

[0010] This invention provides a pressure-resistant housing and its fixing device for monitoring risers, which has the following advantages: 1. The triple sealing of the pressure-resistant housing enhances its reliability. 2. The design of the end cap fixing cylindrical pin, positioning cylindrical pin, sleeve, and core plate fixing screws on the bottom surface of the sleeve reduces monitoring errors caused by relative movement between structures. 3. The application of T-blocks, T-slots, and stop pins solves the problem of rapid underwater assembly and disassembly, making the installation and recovery of monitoring equipment simple and convenient. 4. It solves the problems of installation position and size limitations due to bare single risers during the lowering process, enhancing the versatility and flexibility of the housing and its fixing device. This invention has a simple structure, is easy to assemble, quick to disassemble and assemble, highly reliable, and highly adaptable, and can be widely used in pressure-resistant housings and their fixing devices for monitoring risers. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure assembly of the present invention.

[0012] Figure 2 This is a schematic diagram of the structure of the second fixed bracket in this invention.

[0013] Figure 3 This is a schematic diagram of the structure of the first fixed bracket in this invention.

[0014] Figure 4 This is an exploded view of the pressure-resistant shell structure in this invention.

[0015] Figure 5 This is a schematic diagram of the end cap structure in this invention.

[0016] Explanation of reference numerals in the attached figures:

[0017] In the diagram, 1. Waterproof pipe, 2. Adjustable hose clamp steel band, 3. V-shaped plate, 4. Second fixed bracket, 5. Pressure-resistant shell, 6. Second fixed bracket, 7. Buckle, 8. Mounting groove, 9. T-slot, 10. Stop pin groove, 11. T-block, 12. Stop pin, 13. Clamping buckle, 14. Support sleeve, 15. Machine screw, 16. End cap, 17. Sealing ring, 18. Rubber pad, 19. Left sleeve, 20. Positioning block, 21. Outer shell, 22. End cap countersunk hole, 23. Right sleeve, 24. Through hole on the upper surface of the sleeve, 25. Countersunk hole on the lower surface of the sleeve, 26. Inner wall of the sleeve, 27. Positioning groove, 28. Positioning pin hole, 29. Threaded hole in the outer shell, 30. Fixing cylindrical pin, 31. Sealing groove, 32. Fixing cylindrical pin. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 , Figure 2 As shown, the V-shaped plate 3 has symmetrical mounting grooves 8 along the centerline, through which three hose clamp steel bands 2 can be passed to contact the riser pipe 1. This ensures that the single pipe with a larger outer diameter can withstand buoyancy without affecting the operation of the riser pipe 1 and other auxiliary pipelines. One end of the hose clamp steel band 2 is inserted into the end with a bolt, and the length of the hose clamp steel band 2 can be adjusted by rotating the bolt using an underwater robot.

[0020] like Figure 4 , Figure 5The lower part of the outer casing 21 is the battery compartment, which houses the batteries, while the upper part is the electronics compartment. A double radial and axial sealing ring is installed in the sealing groove 31 of the end cap 16. A rubber gasket 18 is assembled with the inner wall 26 of the sleeve. The core plate can be fixed with screws through the countersunk hole 25 on the bottom surface of the sleeve. The left sleeve 19 and the right sleeve 23 are assembled into a complete sleeve. Four fixing cylindrical pins 32 pass through the through holes 24 on the upper surface of the sleeve and are fixed to the upper end of the monitoring core plate. The positioning block 20 slides into the positioning groove 27 for initial positioning, and the positioning cylindrical pins 30 achieve secondary positioning through the positioning pin holes 28. The sealing ring 17 is assembled into the sealing groove 31 and the upper part of the sealing groove 31 of the end cap 16 to achieve a double radial and axial static seal. The end cap 16 and the outer casing 21 are press-fitted to achieve a triple seal. Six screws 15 are connected to the threaded holes 29 of the outer casing through the countersunk hole 22 of the end cap, driving the end cap 16 to move downwards in a straight line to complete the assembly. Sleeves 19 and 23 are assembled inside the outer casing 21. The bottom surface can fix the battery and manage excessively long power cables. The battery can also be used to support sleeves 19 and 23 in reverse.

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the pressure-resistant housing 5 is placed into the supporting sleeve 14 and clamping ring 13 for fixation, and the buckle 7 is fastened, achieving secondary fixation between the pressure-resistant housing 5 and the first fixed bracket 6, ensuring that there is no relative movement between the pressure-resistant housing 5 and the first fixed bracket 6. The T-shaped block 11 of the first fixed bracket 6 enters the T-shaped groove 9 of the second fixed bracket 4 along the slide rail. When the T-shaped block 11 slides to a certain position, the internal spring of the stop pin 12 retracts and locks into the stop pin groove 10, achieving a self-tightening function, connecting the first fixed bracket 6 and the second fixed bracket 4 into a whole. If it is necessary to replace the monitoring device, the first fixed bracket 6 is lifted upwards, the internal spring of the stop pin 12 retracts, and slides out of the stop pin groove 10, which facilitates the disassembly and installation of the underwater robot.

[0022] It should be noted that the second fixed bracket 4 and the hose clamp steel band 2 were already connected to the water-proof pipe 1 before the water-proof pipe 1 was lowered. The hose clamp steel band 2, the second fixed bracket 4, the first fixed bracket 6, and the pressure-resistant shell 5 can all be adjusted, installed, and disassembled by an underwater robot.

[0023] The first fixed bracket 6 can be removed from the second fixed bracket 4 and replaced with equipment for monitoring other parameters, so that other series of devices for the pressure-resistant housing 5 and its fixing device can be applied.

[0024] The concave side of the V-shaped plate 3 of the second fixed bracket 4 contacts the water-proof pipe 1 through line contact, and water-proof pipes of different diameters can be fixed by the wedge block principle, which improves the versatility of the fixing device.

[0025] In the description and understanding of this invention, it should be clarified that the terms "installation," "connection," and "fixation," etc., used herein should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection, forming an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0026] The beneficial effects of this invention are as follows: It proposes a pressure-resistant housing and its fixing device for monitoring risers. The design of the pressure-resistant housing's sleeve, positioning cylindrical pin, and fixing cylindrical pin improves the reliability of the monitoring device and reduces errors caused by relative movement between structures. It can also adapt to various monitoring durations with adjustable operation. The sliding rail type fixing bracket and the self-locking and self-releasing design of the stop pins make installation and disassembly convenient. The hose clamp steel band and V-shaped plate make the pressure-resistant housing and its fixing device applicable to risers of various diameters, greatly improving the versatility and flexibility of the device and reducing the impact on the normal operation of the riser and its auxiliary pipelines.

[0027] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. The present invention has been described in detail with reference to the foregoing embodiments. Those skilled in the art should understand that the present invention can still be modified in other ways, with equivalent substitutions, changes, etc., and these modifications or substitutions should not cause the corresponding technical essence to deviate from the scope of the technical solutions of the specific embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. An apparatus for riser monitoring, comprising: Pressure-resistant shell, first fixed support, second fixed support, throat clamp steel belt; The pressure-resistant shell comprises an outer shell, a left sleeve, a right sleeve, an end cover, a sealing ring and a rubber pad. The outer shell is divided into an upper chamber and a lower chamber. The upper chamber is an electronic chamber with positioning grooves. Two through holes are formed in the upper surface of each sleeve. The lower bottom surface comprises four counterbores, and each outer side has a positioning block. The left and right sleeves are assembled together and placed in the electronic chamber. The end cover comprises four fixed cylindrical pins, a positioning cylindrical pin and a sealing groove. The end cover sealing groove realizes axial sealing. The end cover and the outer shell contact surface are additionally provided with the sealing ring to realize radial sealing. The end cover and the outer shell are in interference fit to realize triple sealing. The fixed cylindrical pins pass through the sleeve through holes to fix the monitoring core plate. The rubber pad is placed in the sleeve to fix the core plate and prevent the fixed cylindrical pins from crushing the core plate and electronic components. The end cover positioning cylindrical pin is assembled with the outer shell for positioning to eliminate repeated installation operations caused by offset. The first fixed support comprises a T-shaped block, a supporting sleeve, a clamping snap ring, a buckle and a stop pin. The T-shaped block is connected with the T-shaped groove of the second fixed support and is fixed by the stop pin. The supporting sleeve and the clamping snap ring in the pressure-resistant shell realize primary fixation. The buckle is used for secondary fixation of the pressure-resistant shell. The second fixed support comprises a T-shaped groove, a stop pin groove, a V-shaped plate and a mounting groove. The T-shaped groove is assembled with the T-shaped block. The V-shaped plate is provided with mounting grooves symmetrically distributed along the center line. The first fixed support, the second fixed support, the pressure-resistant shell and the riser are fixed together by passing the throat clamp steel belt through the mounting groove.

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