Operating cabin fixed-point spraying device

Abstract

The utility model discloses a fixed-point spraying and flushing device for an operation cabin, and relates to the technical field of well mouth desilting equipment. The spraying frame is connected with the inner wall of the operation cabin, a plurality of combined nozzles are arranged on the spraying frame, and the plurality of combined nozzles are respectively connected with a spraying pipeline; and the multiple dredging pumps are arranged on the spraying and flushing frame. According to the fixed-point spraying and flushing device for the operation cabin, the technical problems that an existing under-mud wellhead dredging device is high in operation cost, manual local dredging is needed after construction of a mud blowing ship is completed, and the risks of silt back silting, pit collapse and the like exist are solved, spraying and flushing liquid is input into the combined nozzles through the spraying and flushing pipeline and sprayed out at a high speed through the combined nozzles; sludge at the position of an operation seabed area is directly sprayed, flushed and scattered, meanwhile, silt is sucked through the dredging pump and discharged out of the operation seabed area through the sludge discharging pipeline, manual local dredging is not needed any more, the operation cost is effectively reduced, and the sludge spraying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wellhead dredging equipment, in particular to a fixed-point jet flushing device for an operation cabin. Background Technique

[0002] Submarine pipelines are important facilities for oil and gas transportation in offshore oil and gas field development. Generally, the anti-corrosion caps of the conductor pipes after abandoning wells completed by conventional mudline suspension are above the mud surface. To reduce the impact of construction operations on waterways, fishery production, and military security, the abandoned wells need to be at a position 4 m below the mud surface, and wellhead dredging is required to provide sufficient operation space for the wellhead connection of the mudline hanger. It is difficult to excavate a certain volume of operation space at a position 4 m below the mud surface. Currently, common operation methods include: direct underwater mechanical excavation, hydraulic jet flushing with air lift, hydraulic jet flushing and mud discharging, etc. Among them, hydraulic jet flushing is the main method.

[0003] Currently, underwater wellhead dredging is usually carried out by artificial means or dredging vessels, etc. The larger the range of the wellhead that needs to be broken through the soil, the more expensive the supporting ship machinery costs such as professional dredging vessels, and the higher the operation cost. On the other hand, after the dredging vessel construction is completed, local dredging needs to be carried out manually. Since there are no protective measures around the soil body, there are risks such as sediment back-silting and pit collapse, resulting in problems such as personal injuries. Therefore, a fixed-point jet flushing device for an operation cabin for solving the above problems is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fixed-point jet flushing device for an operation cabin, which solves the technical problems that the existing underwater wellhead dredging equipment has high operation cost, and after the dredging vessel construction is completed, local dredging needs to be carried out manually, and there are risks such as sediment back-silting and pit collapse, resulting in personal injuries.

[0005] To achieve the above purpose, the utility model provides a fixed-point jet flushing device for an operation cabin, including:

[0006] An operation cabin;

[0007] A jet flushing frame, which is connected to the inner wall of the operation cabin through adjusting bolts. A plurality of combined nozzles are arranged on the jet flushing frame. The plurality of combined nozzles are respectively connected to jet flushing pipelines, and the jet flushing pipelines are used to input jet flushing liquid to the combined nozzles;

[0008] Dredging pumps, a plurality of the dredging pumps are arranged on the jet flushing frame, and the plurality of dredging pumps are respectively connected to mud discharging pipelines, and the mud discharging pipelines are used to discharge the sediment sucked by the dredging pumps.

[0009] Preferably, the combined nozzle includes: a nozzle passage, the first end of the nozzle passage is threadedly connected to the jet flushing pipeline, and a plurality of nozzles are arranged in an array at the second end of the nozzle passage.

[0010] Preferably, the included angle between the axis of the nozzle and the axis of the nozzle passage is between 10° and 30°, and the axis of one of the nozzles coincides with one of the radial cross-sections of the jetting frame.

[0011] Preferably, the jetting frame includes: a lower ring, the top of the lower ring is connected with a plurality of vertical struts, and the upper ends of the plurality of vertical struts are connected with an upper ring.

[0012] Preferably, an inner ring is coaxially arranged inside the lower ring, the lower ring is connected with the inner ring through a connecting rod, and the dredging pump and the combined nozzle are alternately installed on the inner ring.

[0013] Preferably, the inner ring is arranged directly above the wellhead, and the diameter of the inner ring is greater than the maximum projected size of the wellhead and a working space is reserved.

[0014] Preferably, the operation cabin is coaxially arranged with the jetting frame, and the distance between the inner side wall of the operation cabin and the outer side wall of the jetting frame is between 5 mm and 20 mm.

[0015] Preferably, a suction nozzle is provided on the dredging pump, a fixing plate is provided at the first end of the suction nozzle, the fixing plate is connected with the jetting frame, and the second end of the suction nozzle is integrally conical.

[0016] Compared with the above-mentioned background art, an operation cabin fixed-point jetting device provided by the present invention has the following beneficial effects: after the operation cabin and the jetting frame are placed in the operation seabed area, the jetting liquid is input into the combined nozzle through the jetting pipeline and is ejected at a high speed through the combined nozzle, directly jetting and dispersing the silt at the operation seabed area position, replacing the traditional way of breaking soil by a dredger, effectively reducing the operation cost and improving the silt jetting efficiency. On the other hand, the dredging pump sucks in the sediment and discharges the sucked sediment out of the operation seabed area through the sludge discharge pipeline, and there is no need for manual local dredging. Moreover, the jetting frame assists in supporting the soil body at the wellhead position to prevent risks such as sediment back-silting and collapse pits, effectively improving the safety during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0018] Figure 1 It is an assembly schematic diagram of the jetting device provided by the embodiment of the present invention;

[0019] Figure 2The bottom view of the jetting device provided by the embodiment of the present utility model;

[0020] Figure 3 The schematic cross-sectional view of the operation cabin provided by the embodiment of the present utility model;

[0021] Figure 4 The three-dimensional structure diagram of the jetting frame provided by the embodiment of the present utility model;

[0022] Figure 5 The plan view of the jetting device provided by the embodiment of the present utility model;

[0023] Figure 6 The three-dimensional structure diagram of the combined nozzle provided by the embodiment of the present utility model;

[0024] Figure 7 The schematic cross-sectional view of the combined nozzle provided by the embodiment of the present utility model;

[0025] Figure 8 The three-dimensional structure diagram of the suction nozzle provided by the embodiment of the present utility model.

[0026] Specifically, 1 - operation cabin; 2 - jetting frame; 201 - upper ring; 202 - lower ring; 203 - inner ring; 204 - vertical strut; 205 - connecting rod; 206 - diagonal brace; 3 - adjusting bolt; 4 - combined nozzle; 401 - connecting thread; 402 - nozzle passage; 403 - nozzle; 404 - nozzle mounting seat; 405 - stepped groove; 5 - dredging pump; 6 - tray; 7 - jetting pipeline; 8 - mud discharging pipeline; 9 - suction nozzle. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In order to enable those skilled in the art in this technical field to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0029] As Figure 1 and Figure 3 shown, to achieve the above object, the present utility model provides a fixed-point jetting device for an operation cabin 1, including: an operation cabin 1 and a jetting frame 2 arranged in the operation cabin 1.

[0030] Among them, the operation cabin 1 is generally barrel-shaped. Preferably, the operation cabin 1 is assembled by welding, mainly providing an installation space for the jet flushing frame 2. The jet flushing frame 2 is arranged on the top surface of the operation cabin 1, and the jet flushing frame 2 is connected to the inner wall of the operation cabin 1 through adjustment bolts 3. It should be noted that the jet flushing frame 2 is generally column-shaped. When the operation cabin 1 is placed in the operation seabed area, the jet flushing frame 2 is located directly above the wellhead, and the soil at the wellhead position is assisted to support through the jet flushing frame 2, preventing risks such as sediment back-silting and collapse pits, and effectively improving the safety during operation.

[0031] As Figure 2 shown, several combined nozzles 4 are provided on the jet flushing frame 2. The several combined nozzles 4 are respectively connected to the jet flushing pipelines 7. The jet flushing pipelines 7 are used to input jet flushing liquid into the combined nozzles 4. Among them, seawater can be used as the jet flushing liquid, which can be taken and used at any time. The jet flushing liquid is sprayed out at high speed through the combined nozzles 4 to flush the silt in the operation seabed area, quickly dispersing the silt at the wellhead position. Compared with the traditional way of breaking soil by a dredger, the operation cost is effectively reduced, and the silt flushing is more efficient.

[0032] Several trays 6 are provided on the jet flushing frame 2. A dredging pump 5 is installed on each tray 6. The dredging pump 5 sucks the silt that has been dispersed by the combined nozzles 4. The dredging pump 5 is connected to the mud discharge pipeline 8. The dredging pump 5 discharges the sucked sediment through the mud discharge pipeline 8 from the operation seabed area, eliminating the need for manual local dredging and preventing the risk of sediment back-silting, making the operation safer.

[0033] During use, the jet flushing frame 2 is installed in the operation cabin 1, and the distance between the combined nozzles 4 and the bottom surface of the operation cabin 1 is adjusted; the dredging pump 5 and the combined nozzles 4 are alternately installed on the jet flushing frame 2. The combined nozzles 4 are connected to the jet flushing pipelines 7, and the dredging pump 5 is connected to the mud discharge pipeline 8. Both the jet flushing pipelines 7 and the mud discharge pipeline 8 are connected to the mother ship; the mother ship lowers the operation cabin 1 to the operation seabed area through the lifting device, and the soil at the wellhead position is assisted to support through the jet flushing frame 2 to prevent the risk of collapse pits. The jet flushing liquid is input into the combined nozzles 4 through the jet flushing pipelines 7 and is sprayed out at high speed through the combined nozzles 4 to disperse the silt at the wellhead position. Compared with the traditional way of breaking soil by a dredger, the operation cost is effectively reduced, and the silt flushing efficiency is improved. The dredging pump 5 sucks in the sediment and discharges the sucked sediment through the mud discharge pipeline 8 from the operation seabed area. The whole process does not require manual local dredging and other related operations. Even if risks such as sediment back-silting and collapse pits occur, it will not cause harm to the staff. The staff has no related operation risks, and the mother ship is slowly lowered through the lifting device until the entire operation seabed area is flushed.

[0034] As Figure 6 and Figure 7As shown in the figure, the combined nozzle 4 includes: a nozzle passage 402, the upper end of the nozzle passage 402 is provided with a connecting thread, the nozzle passage 402 is connected to the jetting pipeline 7 through the connecting thread 401, and the jetting pipeline 7 conveys jetting liquid into the nozzle passage 402. A number of nozzles 403 are arranged in an array at the lower end of the nozzle passage 402. Specifically, three nozzles 403 are equiangularly arranged at the lower end of each nozzle passage 402. The jetting liquid is conveyed to each nozzle 403 through the nozzle passage 402, and the jetting liquid is directed and ejected at high speed through the nozzles 403 to complete the jetting and dispersing of the silt. In addition, a nozzle mounting seat 404 is provided on the outer peripheral side of the upper end of the nozzle 403, and the combined nozzle 4 is fixed on the jetting frame 2 through the nozzle mounting seat 404.

[0035] In addition, a stepped groove 405 is provided at the upper end of the nozzle passage 402, and a sealing ring is provided at the position of the stepped groove 405. The setting of the sealing ring can tightly connect the combined nozzle 4 and the jetting pipeline 7 to avoid problems such as water leakage at the connection between the combined nozzle 4 and the jetting pipeline 7.

[0036] It should be noted that the angle between the axis of the nozzle 403 and the axis of the nozzle passage 402 is between 10 - 30°, that is, the nozzle 403 does not point vertically to the bottom surface of the jetting frame 2. Preferably, the angle between the axis of the nozzle 403 and the axis of the nozzle passage 402 is 22.5°, which can maximize the jetting area covered by the three nozzles 403, and at the same time can ensure the impact effect of the jetting liquid on the silt after being ejected from the nozzle 403.

[0037] Furthermore, the axis of one of the nozzles 403 coincides with one of the radius cross-sections of the jetting frame 2. Specifically, one of the nozzles 403 in each combined nozzle 4 jets the jetting liquid towards the outside of the working seabed area. The coverage areas of the jetting liquid ejected by the other two nozzles 403 are respectively as connected as possible with the coverage areas of the jetting liquid ejected by the nozzles 403 in the adjacent combined nozzles 4, so as to ensure that the nozzles 403 can achieve the optimal coverage area for jetting the silt in the working seabed area, and effectively improve the jetting efficiency of each combined nozzle 4 for the silt in the working seabed area.

[0038] As Figure 4 and Figure 5As shown in the figure, the flushing frame 2 includes: a lower ring 202, several vertical supports 204 are connected to the top of the lower ring 202, and the upper ends of several vertical supports 204 are connected to an upper ring 201. Specifically, the upper ring 201 and the lower ring 202 are connected by four vertical supports 204 to assemble the flushing frame 2 into a columnar structure. In addition, an inner ring 203 is coaxially arranged inside the lower ring 202, and the lower ring 202 is connected to the inner ring 203 by a connecting rod 205. Among them, the upper ring 201 and the inner ring 203 are further connected by a diagonal brace 206. The combination of the diagonal brace 206, the vertical support 204 and the connecting rod 205 forms a stable triangular structure, which can improve the stability of the overall flushing frame 2, enable the flushing frame 2 to have sufficient structural strength during operation, and further ensure the stability of the combined nozzle 4 and the dredging pump 5 during operation.

[0039] In an embodiment of the present invention, the dredging pump 5 and the combined nozzle 4 are alternately installed on the inner ring 203, and the combined nozzle 4 and the dredging pump 5 are alternately and evenly distributed. Each combined nozzle 4 is adjacent to two dredging pumps 5, and the distance between each adjacent combined nozzle 4 and dredging pump 5 is equal, and the distance between two adjacent combined nozzles 4 is equal to the distance between two adjacent dredging pumps 5, so as to ensure that the operation seabed area can be evenly flushed by each combined nozzle 4 and further improve the silt flushing efficiency of each combined nozzle 4 on the operation seabed area.

[0040] In addition, the number of dredging pumps 5 and combined nozzles 4 is selected and arranged according to the size of the wellhead, so as to ensure that each combined nozzle 4 can flush as much silt as possible in each part of the operation seabed area and improve the silt flushing efficiency of the operation seabed area.

[0041] As Figure 8 shown, a suction nozzle 9 is provided on the dredging pump 5. The upper end of the suction nozzle 9 is threadedly connected to the dredging pump 5. A fixing plate is provided on the outer side wall of the upper end portion of the suction nozzle 9. The fixing plate is connected to the flushing frame 2 for assisting in fixing the suction nozzle 9. The lower end of the suction nozzle 9 is integrally conical to increase the suction area of the suction nozzle 9 and further improve the efficiency of the dredging pump 5 in sucking sediment.

[0042] It should be noted that the inner ring 203 is arranged directly above the wellhead, and the diameter of the inner ring 203 is larger than the maximum projected size of the wellhead, so as to ensure that the combined nozzle 4 and the dredging pump 5 can flush and suck the silt directly above the wellhead and near the wellhead clean, reserve a certain operation space for the wellhead connection, and ensure the smooth progress of the wellhead connection.

[0043] In an embodiment of the present utility model, a plurality of first lifting rings are arranged in an array on the top surface of the upper ring 201. The first lifting rings are used to connect a lifting device, and the lifting device is arranged on a mother ship. The entire jet flushing frame 2 is hoisted into the operation cabin 1 by connecting the first lifting rings through the lifting device on the mother ship. In addition, a plurality of second lifting rings are arranged in an array on the outer peripheral side surface of the upper end portion of the operation cabin 1. The second lifting rings are used to connect the lifting device. After the jet flushing frame 2 is hoisted into the operation cabin 1 and stably installed, the operation cabin 1 together with the jet flushing frame 2 is hoisted to the operation seabed area by connecting the second lifting rings through the lifting device, completing the fixed-point placement of the operation cabin 1.

[0044] It should be noted that the operation cabin 1 and the jet flushing frame 2 are coaxially arranged, and the distance between the inner side wall of the operation cabin 1 and the outer side wall of the jet flushing frame 2 is between 5 - 20 mm, that is, a certain assembly space is reserved between the operation cabin 1 and the jet flushing frame 2 to prevent the jet flushing frame 2 from being stuck in the operation cabin 1 and not affecting the later disassembly, repair and replacement. Preferably, the distance between the inner side wall of the operation cabin 1 and the outer side wall of the jet flushing frame 2 is 10 mm. Specifically, when adjusting the bolt 3 to connect the operation cabin 1 and the jet flushing frame 2, the position of the jet flushing frame 2 relative to the operation cabin 1 is flexibly adjusted and locked by screwing the adjusting bolt 3.

[0045] When the present utility model is in use, the mother ship stays near the operation seabed area. The jet flushing frame 2 is installed in the operation cabin 1, and the distance between the combined nozzle 4 and the bottom surface of the operation cabin 1 is adjusted to 10 mm. According to the jet flushing pressure and jet flushing speed, the distance between the combined nozzle 4 and the bottom surface of the operation cabin 1 is determined. The dredge pump 5 and the combined nozzle 4 are alternately installed on the jet flushing frame 2. The combined nozzle 4 is connected to the jet flushing pipeline 7, and the dredge pump 5 is connected to the mud discharge pipeline 8. Both the jet flushing pipeline 7 and the mud discharge pipeline 8 are connected to the mother ship. The mother ship lowers the operation cabin 1 to the operation seabed area through the lifting device. The jet flushing liquid is input into the combined nozzle 4 through the jet flushing pipeline 7 and the combined nozzle 4 sprays the jet flushing liquid at a high speed, spraying and dispersing the silt at the operation seabed area. At the same time, the dredge pump 5 is started. The dredge pump 5 sucks in the sediment and discharges the sucked sediment out of the operation seabed area through the mud discharge pipeline 8. The mother ship slowly lowers the operation cabin 1 through the lifting device until the entire operation seabed area is jet flushed, the sediment near the wellhead is cleaned up, the wellhead is reconnected, and the operation cabin 1 is lifted until it leaves the operation seabed area through the lifting device.

[0046] It should be noted that the distance between the combined nozzle 4 and the bottom surface of the operation cabin 1, that is, the jet impact target distance. The setting of the jet impact target distance can generate the maximum impact force and impact area on the silt by the jet liquid ejected from the nozzle 403. According to the jet impact pressure and jet impact speed, the jet impact target distance is determined through simulation analysis and calculation. Before the operation cabin 1 is hoisted to the operation seabed area, the installation height of the combined nozzle 4 relative to the bottom surface of the operation cabin 1 is determined, effectively improving the construction efficiency.

[0047] In summary, the jet liquid is input into the combined nozzle 4 through the jet pipeline 7 and ejected at high speed through the combined nozzle 4, directly jetting and dispersing the silt at the operation seabed area. At the same time, the dredging pump 5 sucks in the sediment and discharges the sucked sediment out of the operation seabed area through the sediment discharge pipeline 8. There is no need for manual local dredging, effectively reducing the operation cost and improving the silt jetting efficiency. Moreover, there is no need to worry about risks such as sediment back-silting and pit collapse, effectively improving the safety during operation.

[0048] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A fixed-point spraying device for an operating cabin, characterized in that: include: Operation cabin; A spray frame is connected to the inner wall of the working cabin by adjusting bolts, and a plurality of combined nozzles are arranged on the spray frame, and the plurality of combined nozzles are respectively connected to spray pipelines, and the spray pipelines are used to input spray liquid to the combined nozzles; A dredging pump, wherein a plurality of the dredging pumps are arranged on the spray frame, and the plurality of the dredging pumps are respectively connected to a mud discharge pipeline, and the mud discharge pipeline is used to discharge the mud and sand sucked by the dredging pump.

2. A fixed-point spraying device for an operation cabin according to claim 1, characterized in that: The combined nozzle comprises: a nozzle passage, a first end of which is threadedly connected to the spray pipeline, and a second end of which is arrayed with a plurality of nozzles.

3. A fixed-point spraying device for an operation cabin according to claim 2, characterized in that: The angle between the axis of the nozzle and the axis of the nozzle passage is between 10-30°, and the axis of one of the nozzles coincides with one of the radial sections of the spray frame.

4. A fixed-point spraying device for an operation cabin according to any one of claims 1 to 3, characterized in that: The spray frame comprises a lower ring, the top of which is connected to a plurality of vertical supports, and the upper ends of the plurality of vertical supports are connected to the upper ring.

5. A fixed-point spraying device for an operation cabin according to claim 4, characterized in that: An inner ring is coaxially arranged on the inner side of the lower ring, the lower ring is connected to the inner ring via a connecting rod, and the dredging pump and the combined nozzle are staggeredly installed on the inner ring.

6. A fixed-point spraying device for an operation cabin according to claim 5, characterized in that: The inner ring is arranged just above the wellhead, and the diameter of the inner ring is larger than the maximum projection size of the wellhead and reserves working space.

7. A fixed-point spraying device for an operation cabin according to claim 6, characterized in that: The working cabin is coaxially arranged with the spray frame, and the distance between the inner wall of the working cabin and the outer wall of the spray frame is between 5-20 mm.

8. A fixed-point spraying device for an operation cabin according to any one of claims 1 to 3, characterized in that: The dredging pump is provided with a suction nozzle, a first end of the suction nozzle is provided with a fixing plate, the fixing plate is connected to the spray frame, and the second end of the suction nozzle is in a cone shape as a whole.

Images