Automatic cleaning device for water intake caisson of shallow sea oil and gas platform

Abstract

The utility model relates to a kind of automatic cleaning device of beach shallow sea oil and gas platform water intake caisson, comprising: base coil, top frame, pressure pipe, support rod and air inlet pipe;Top frame and base coil are arranged in upper and lower interval, and several support rods are fixedly connected between top frame and base coil;The upper and lower ends of pressure pipe are respectively fixedly connected to the center of top frame and the center of base coil, and pressure pipe is communicated with base coil;Several gas injection holes are provided on base coil;Air inlet pipe is connected with the top end of pressure pipe, and air inlet pipe is used to pass into compressed air.The automatic cleaning device of beach shallow sea oil and gas platform water intake caisson can be installed in water intake caisson, compressed air is passed into pressure pipe through air inlet pipe, compressed air is discharged from the gas injection hole on base coil, sludge in water intake caisson is impacted and broken and forms emulsification effect, and gas lift effect with the volume of gas bubble increasing is used to carry out silt particle from caisson, so as to realize the automatic cleaning of water intake caisson.

Description

Technical Field

[0001] This utility model relates to the field of cleaning technology for water intake caissons of offshore oil and gas platforms, and more specifically, to an automatic cleaning device for water intake caissons of shallow sea oil and gas platforms. Background Technology

[0002] Offshore oil and gas platforms need to extract seawater to meet the production needs of their fire-fighting and seawater systems. In shallow areas, due to the shallow water depth and the proximity of the pump inlet to the seabed mud surface, the seawater is turbid and contains high levels of sediment. Direct extraction can lead to pump and filter blockage and damage. Therefore, intake caissons are installed to improve the quality of the intake water. This serves two purposes: firstly, it raises the height of the intake from the seabed, utilizing gravity settling to extract water from the upper layer with less suspended matter; secondly, it involves dredging and removing sediment from inside the caisson, increasing the distance between the intake and the mud surface to create effective sedimentation space. However, over time, the continuous deposition of suspended sediment particles in the seawater causes the mud surface inside the caisson to rise and the water quality to deteriorate. Therefore, it is necessary to regularly clean the sediment inside the caisson to maintain the mud surface level and the distance between the pump inlet and the intake.

[0003] Conventional caisson cleaning involves manual labor, with divers using submersible pumps to remove silt. This requires repeatedly moving the pumps to achieve the desired cleaning effect. While this method effectively removes silt from the caisson, it necessitates a pre-planned pump shutdown, removal of the underwater pump head, and the use of small work vessels and a team of divers. Consequently, the caisson cleaning process is lengthy and costly. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform, which aims to solve the problems existing in the prior art.

[0005] According to this utility model, an automatic cleaning device for the intake caisson of a shallow-sea oil and gas platform is provided, comprising: a base coil, a top frame, a pressure pipe, a support rod, and an air inlet pipe; wherein... The top frame and the base coil are spaced apart vertically, and a plurality of the support rods are fixedly connected between the top frame and the base coil. The upper and lower ends of the pressure tube are fixedly connected to the center of the top frame and the center of the base coil, respectively, and the pressure tube is connected to the base coil. The base coil is provided with several air injection holes; The intake pipe is connected to the top end of the pressure pipe, and the intake pipe is used to introduce compressed air.

[0006] Preferably, both the base coil and the top frame are circular frame structures, and the outer diameter of the base coil and the top frame is 80mm~150mm smaller than the inner diameter of the water intake sump.

[0007] Preferably, the base coil includes an outer annular tube, an inner annular tube, and a plurality of radial tubes. The outer annular tube and the inner annular tube are coaxially arranged. The plurality of radial tubes are evenly distributed along the circumference of the outer annular tube. The inner and outer ends of the radial tubes are respectively fixed to the pressure tube and the outer annular tube, and the radial tubes are respectively connected to the pressure tube and the outer annular tube. The middle part of the radial tubes is fixed to the inner annular tube.

[0008] Preferably, a plurality of fixing rods are provided between the outer annular tube and the inner annular tube, and the plurality of fixing rods are evenly distributed along the circumference of the outer annular tube.

[0009] Preferably, the structure of the top frame is the same as that of the base coil.

[0010] Preferably, the distance between the top frame and the base coil is 2m to 2.5m.

[0011] Preferably, it also includes an air supply pipeline, which comprises a plurality of rigid and flexible pipelines connected in an alternating manner. The lower end of the air supply pipeline is connected to the air intake pipe, and the upper end of the air supply pipeline is connected to an external compressed air source on the oil and gas platform.

[0012] Preferably, the pressure tube is made of circular steel pipe, and the diameter of the pressure tube is 120mm~200mm.

[0013] Preferably, the base coil, top frame, pressure pipe, support rod, and air intake pipe are all made of stainless steel.

[0014] Preferably, a tapered tube is connected to the top end of the pressure tube, the large-diameter end of the tapered tube is connected to the pressure tube, and the small-diameter end of the tapered tube is connected to the air intake tube.

[0015] The automatic cleaning device for the intake caisson of the shallow sea oil and gas platform provided by this utility model can be installed in the intake caisson. Compressed air is introduced into the pressure pipe through the air inlet pipe, and the compressed air is discharged from the air injection hole on the base coil. The silt in the intake caisson is impacted and broken up to form an emulsification effect. As the air bubbles rise and the volume increases, the air lift effect carries the mud and sand particles out of the caisson, thereby realizing the automatic cleaning of the intake caisson. Attached Figure Description

[0016] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings.

[0017] Figure 1 A three-dimensional structural schematic diagram of an automatic cleaning device for water intake caissons of shallow sea oil and gas platforms according to an embodiment of the present invention is shown.

[0018] Figure 2 A schematic diagram showing the installation arrangement of the automatic cleaning device for the intake caisson of a shallow sea oil and gas platform according to an embodiment of the present invention is shown.

[0019] In the diagram: 1. Base coil; 11. Outer annular tube; 12. Inner annular tube; 13. Radial tube; 14. Fixing rod; 101. Injection hole; 2. Top frame; 3. Pressure tube; 31. Conical tube; 4. Support rod; 5. Inlet tube. Detailed Implementation

[0020] Various embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0021] This utility model provides an automatic cleaning device for the water intake caisson of a shallow-sea oil and gas platform. (See also...) Figure 1 The automatic cleaning device for the intake caisson of the shallow sea oil and gas platform includes: a base coil 1, a top frame 2, a pressure pipe 3, support rods 4, and an air inlet pipe 5; wherein, the top frame 2 and the base coil 1 are arranged vertically at intervals, and several support rods 4 are fixedly connected between the top frame 2 and the base coil 1; the upper and lower ends of the pressure pipe 3 are respectively fixedly connected to the center of the top frame 2 and the center of the base coil 1, and the pressure pipe 3 is connected to the base coil 1; several air injection holes 101 are provided on the base coil 1; the air inlet pipe 5 is connected to the top end of the pressure pipe 3, and the air inlet pipe 5 is used to introduce compressed air.

[0022] When in use, the automatic cleaning device for the intake caisson of the shallow sea oil and gas platform can be supplied with high-pressure air through the air source on the oil and gas platform. The high-pressure air enters the pressure pipe 3 through the air inlet pipe 5 and is ejected through the air ejection hole 101 on the base coil 1. The energy of the high-pressure air ejected from the air ejection hole 101 and the expansion and crushing can disperse the sediment in the intake caisson, forming an impact crushing and emulsification effect on the sediment. The suspended particles are discharged from the caisson by the air lift effect of the rising bubbles and volume expansion, thus realizing the automatic cleaning of the intake caisson.

[0023] Furthermore, both the base coil 1 and the top frame 2 are circular frame structures, and their outer diameters are 80mm to 150mm smaller than the inner diameter of the intake caisson. The intake caisson body is cylindrical, and by setting both the base coil 1 and the top frame 2 as circular frame structures with outer diameters 80mm to 150mm smaller than the inner diameter of the intake caisson, it is easier to install and fix the automatic cleaning device for the intake caisson of the shallow-sea oil and gas platform within the caisson. In this embodiment, the outer diameters of the base coil 1 and the top frame 2 are 100mm smaller than the inner diameter of the intake caisson. This automatic cleaning device for the intake caisson of the shallow-sea oil and gas platform is suitable for intake caissons with an inner diameter of not less than 1.4m, and the external dimensions of the device can be adjusted according to the size of the intake caisson. Figure 2 As shown, when the automatic cleaning device for the intake caisson of the shallow sea oil and gas platform is installed in the intake caisson, the base coil 1 is supported on the pre-set bracket on the inner wall of the intake caisson, and the top frame 2 is fixedly connected to the inner wall of the intake caisson by clamps and fixing bolts. The connection position is above the seabed and close to the top of the intake caisson, and the underwater installation is simple.

[0024] Further, the base coil 1 includes an outer annular tube 11, an inner annular tube 12, and a plurality of radial tubes 13. The outer annular tube 11 and the inner annular tube 12 are coaxially arranged, and the plurality of radial tubes 13 are evenly distributed along the circumference of the outer annular tube 11. The inner and outer ends of the radial tubes 13 are respectively fixed to the pressure tube 3 and the outer annular tube 11, and the radial tubes 13 are respectively connected to the pressure tube 3 and the outer annular tube 11. The middle part of the radial tube 13 is fixed to the inner annular tube 12. In this embodiment, the air ejection hole 101 is opened on the outer annular tube 11. The pressure tube 3 and the outer annular tube 11 are connected through the radial tubes 13, so that the high-pressure air delivered in the pressure tube 3 can be delivered to the outer annular tube 11 through the radial tubes 13, so as to be ejected through the air ejection hole 101 on the outer annular tube. Furthermore, a plurality of fixing rods 14 are provided between the outer annular tube 11 and the inner annular tube 12, and the plurality of fixing rods 14 are evenly distributed along the circumference of the outer annular tube 11. By providing a plurality of fixing rods 14 between the outer annular tube 11 and the inner annular tube 12, the overall structural strength of the base coil 1 is further enhanced. Preferably, the structure of the top frame 2 is the same as the structure of the base coil 1.

[0025] Furthermore, the distance between the top frame 2 and the base coil 1 is 2m to 2.5m. The pressure pipe 3 is made of circular steel pipe with a diameter of 120mm to 200mm. In this embodiment, the distance between the top frame 2 and the base coil 1 is 2.2m, the pressure pipe 3 is made of circular steel pipe with a diameter of 160mm, the outer annular pipe 11 and the inner annular pipe 12 in the base coil 1 are made of circular steel pipe with a diameter of 80mm, and the air injection holes 101 on the base coil 1 have a diameter of 10mm and there are 24 of them, which are evenly distributed on the top of the outer annular pipe 11.

[0026] Furthermore, the base coil 1, top frame 2, pressure pipe 3, support rod 4, and air inlet pipe 5 are all made of stainless steel, which improves the corrosion resistance of the device and thus extends its service life.

[0027] Furthermore, a tapered tube 31 is connected to the top end of the pressure pipe 3. The large-diameter end of the tapered tube 31 is connected to the pressure pipe 3, and the small-diameter end of the tapered tube 31 is connected to the air inlet pipe 5. By setting the tapered tube 31 at the top end of the pressure pipe 3, the connection between the pressure pipe 3 and the air inlet pipe 5 is facilitated. The transition connection between the air inlet pipe 5 and the pressure pipe 3 through the tapered tube 31 can reduce fluid resistance and energy loss during high-pressure air transportation, improve the flow stability and uniformity of high-pressure gas, and at the same time, reduce pipeline noise and vibration caused by flow separation, eddy shedding, and strong turbulence due to drastic cross-sectional changes.

[0028] Furthermore, the automatic cleaning device for the intake caisson of the shallow-sea oil and gas platform also includes an air supply pipeline. This pipeline comprises multiple rigid and flexible pipes connected in a staggered manner. The lower end of the air supply pipeline is connected to the air inlet pipe 5, and the upper end is connected to an external compressed air source on the oil and gas platform. See also... Figure 2 In this embodiment, the air supply pipeline consists of multiple sections of 2″ rigid pipe and 2″ flexible pipe connected in an alternating pattern. The lower end of the air supply pipeline is connected to the air inlet pipe 5 via a 2″ flexible pipe, and the upper end of the air supply pipeline is connected to the compressed air source on the oil and gas platform deck via a 2″ rigid pipe. The flexible pipe serves as a transition section in the air supply pipeline, facilitating adjustments for installation deviations and ensuring reliable installation. In this embodiment, the air source and control switch are located on the platform deck, enabling one-button start and stop for convenient operation. The device uses compressed air from the platform's process system as its air source, eliminating the need for additional air compression and storage equipment. The platform's high-pressure air pressure is required to be no less than 300 kPa, with a flow rate of 50 sm³. 3 / h.

[0029] When using the automatic cleaning device for the intake caisson of this shallow-sea oil and gas platform, high-pressure air is delivered sequentially through the air supply pipe, inlet pipe 5, and pressure pipe 3 to the base coil 1 by opening the compressed air source valve on the platform. The air then flows out from the injection hole 101 on the base coil 1. Because the gas pressure is much greater than the external water pressure and silt pressure at the injection hole, the gas can be ejected along the injection hole 101, impacting and breaking up the silt and creating an emulsification effect. The air lift effect, caused by the rising air bubbles, carries the sediment particles out of the intake caisson. The cleaning is complete after 20 minutes of cleaning or when the water coming out of the top of the intake caisson is no longer turbid. At this point, the air source valve on the platform can be closed.

[0030] In summary, the automatic cleaning device for the intake caisson of the shallow sea oil and gas platform provided by this utility model can be installed in the intake caisson. Compressed air is introduced into the pressure pipe through the air inlet pipe, and the compressed air is discharged from the air injection hole on the base coil. The silt in the intake caisson is impacted and broken up to form an emulsification effect. As the air bubbles rise and the volume increases, the air lift effect carries the mud and sand particles out of the caisson, thereby realizing the automatic cleaning of the intake caisson.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An automatic cleaning device for a water intake caisson of a shallow sea oil and gas platform, characterized in that, include: The components include a base coil, a top frame, pressure pipes, support rods, and an intake pipe; among which, The top frame and the base coil are spaced apart vertically, and a plurality of the support rods are fixedly connected between the top frame and the base coil. The upper and lower ends of the pressure tube are fixedly connected to the center of the top frame and the center of the base coil, respectively, and the pressure tube is connected to the base coil. The base coil is provided with several air injection holes; The intake pipe is connected to the top end of the pressure pipe, and the intake pipe is used to introduce compressed air.

2. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 1, characterized in that, Both the base coil and the top frame are circular frame structures, and the outer diameter of the base coil and the top frame is 80mm~150mm smaller than the inner diameter of the water intake caisson.

3. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 2, characterized in that, The base coil includes an outer annular tube, an inner annular tube, and multiple radial tubes. The outer annular tube and the inner annular tube are coaxially arranged. The multiple radial tubes are evenly distributed along the circumference of the outer annular tube. The inner and outer ends of the radial tubes are respectively fixed to the pressure tube and the outer annular tube, and the radial tubes are respectively connected to the pressure tube and the outer annular tube. The middle part of the radial tube is fixed to the inner annular tube.

4. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 3, characterized in that, A plurality of fixing rods are also provided between the outer annular tube and the inner annular tube, and the plurality of fixing rods are evenly distributed along the circumference of the outer annular tube.

5. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 4, characterized in that, The structure of the top frame is the same as that of the base coil.

6. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 1, characterized in that, The distance between the top frame and the base coil is 2m to 2.5m.

7. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 1, characterized in that, It also includes an air supply pipeline, which comprises multiple rigid and flexible pipelines connected in an alternating manner. The lower end of the air supply pipeline is connected to the air intake pipe, and the upper end of the air supply pipeline is connected to an external compressed air source on the oil and gas platform.

8. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 1, characterized in that, The pressure tube is made of circular steel pipe with a diameter of 120mm to 200mm.

9. The automatic cleaning device for the water intake caisson of a shallow-sea oil and gas platform according to claim 1, characterized in that, The base coil, top frame, pressure pipe, support rod, and air intake pipe are all made of stainless steel.

10. The automatic cleaning device for the water intake caisson of a shallow sea oil and gas platform according to claim 1, characterized in that, A tapered tube is connected to the top of the pressure tube. The large-diameter end of the tapered tube is connected to the pressure tube, and the small-diameter end of the tapered tube is connected to the air intake tube.

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