Prefabricated wellhead equipment protection device

Abstract

The utility model provides a prefabricated wellhead equipment protection device, and belongs to the field of wellhead equipment. The prefabricated wellhead equipment protection device comprises two prefabricated bodies used for being arranged in a wellhead foundation pit, each prefabricated body is of a box structure with an opening in one side, each prefabricated body comprises a top plate, a bottom plate and a side plate, and the opening ends of the two prefabricated bodies are used for being in butt joint to form a cover body covering wellhead equipment to be monitored. The top plates and the bottom plates of the two prefabricated bodies are provided with receding openings used for receding the well mouth flow during butt joint correspondingly, the top plate of at least one prefabricated body is provided with an entrance and exit for personnel to enter and exit the prefabricated body, and the entrance and exit position is provided with a ladder extending towards the bottom plate. The two prefabricated bodies can be manufactured in advance, directly placed in a foundation pit during installation and smoothly butted by means of the receding opening, and equipment can be monitored through the access opening and a ladder entering and exiting cover body during use, so that the construction period is greatly shortened, an injection and production well can be quickly put into production, and the influence on production is reduced.

Description

Technical Field

[0001] The utility model relates to a prefabricated wellhead equipment protection device, belonging to the field of wellhead equipment. Background Technique

[0002] In oil and gas production, usually only the necessary process gates for ensuring operation are set above the ground at the injection-production wellhead, and the rest of the processes are located below the ground and filled with earth and stone. However, as the development years of the oilfield increase, the well conditions of the injection-production wells gradually deteriorate over time. To ensure safe production, it is necessary to detect the change conditions of equipment such as production casing, technical casing, and surface casing. Especially in the construction of gas storage reservoirs, the relevant equipment of the injection-production wellhead needs to be monitored regularly. The method of earth and stone backfilling will not only be unfavorable for daily observation and monitoring, resulting in the inability to timely discover potential problems and causing safety and environmental protection accidents, but also when sudden situations occur and treatment is required, it will face problems such as unclear specific underground conditions, high risk of earthwork operations, and the extension of the treatment construction period due to the excavation of earth and stone.

[0003] Currently, during the construction of gas storage reservoirs, to facilitate later observation and operation, when the production well is completed, a foundation pit is dug in the wellhead area to expose the wellhead processes that need to be monitored and operated, and then reinforced concrete is set around the foundation pit to establish an operation space, so as to be able to observe, monitor, and operate the relevant equipment at any time and conveniently, and at the same time provide an operation space for maintenance. However, when establishing the operation space through concrete, it is necessary to establish a steel bar framework on-site and then pour concrete. At this time, it is necessary to wait for the concrete structure to solidify before it can be used, resulting in a long construction period for the protection device, and during the construction process, the injection-production well cannot be normally produced and used, so that the injection-production well cannot be put into production for a long time, resulting in a greater impact on production. Content of the Utility Model

[0004] The purpose of the utility model is to provide a prefabricated wellhead equipment protection device to solve the problem that when the existing foundation pit uses concrete to build the protection device, the long construction period causes the injection-production well to be unable to be put into production for a long time, resulting in a greater impact on production.

[0005] To achieve the above purpose, the prefabricated wellhead equipment protection device in the utility model adopts the following technical solutions:

[0006] A prefabricated wellhead equipment protection device includes two prefabricated bodies arranged in a wellhead foundation pit. Both prefabricated bodies are box structures with openings on only one side, and each of the two prefabricated bodies includes a top plate, a bottom plate, and side plates. The open ends of the two prefabricated bodies are used for butt joint connection to form a cover body that covers the wellhead equipment to be monitored. Avoidance openings for avoiding the wellhead process during butt joint are respectively provided on the top plates and bottom plates of the two prefabricated bodies. An inlet and outlet for personnel to enter and exit the prefabricated body are provided on the top plate of at least one prefabricated body, and a ladder extending towards the bottom plate is arranged at the position of the inlet and outlet.

[0007] The beneficial effects of the above technical solution are as follows: The utility model belongs to a pioneering invention. The prefabricated wellhead equipment protection device includes two prefabricated bodies arranged in a wellhead foundation pit. Both prefabricated bodies are box structures with openings on only one side, and each of the two prefabricated bodies includes a top plate, a bottom plate, and side plates. The open ends of the two prefabricated bodies can be butt-jointed together, so that the two prefabricated bodies form a cover body that covers the wellhead equipment to be monitored. Avoidance openings for avoiding the wellhead process during butt joint are respectively provided on the top plates and bottom plates of the two prefabricated bodies to ensure that when installing, the two prefabricated bodies can avoid the wellhead process and be butt-jointed smoothly, avoiding affecting the wellhead process. An inlet and outlet for personnel to enter and exit the prefabricated body are provided on the top plate of at least one prefabricated body, and a ladder extending towards the bottom plate is arranged at the position of the inlet and outlet. When it is necessary to monitor and operate the equipment to be monitored in the cover, personnel can enter the cover body through the inlet and outlet and the ladder, and come out through the ladder from the inlet and outlet after completing the detection and operation. The two prefabricated bodies can be pre-produced. When installing and using, the two prefabricated bodies can be directly placed into the foundation pit, and can smoothly avoid the wellhead process and be butt-jointed to form a cover body by means of the avoidance openings. Therefore, the construction time is greatly shortened, the injection-production well can be quickly put back into production, and the impact on production is effectively reduced.

[0008] Further, the top plate of at least one prefabricated body is a grid plate to enable the space inside the cover body to communicate with the outside.

[0009] Further, a sump is arranged on the bottom plate of at least one prefabricated body, and a drain pipe penetrating the top plate is fixed on the top plate. The bottom end of the drain pipe extends into the sump, and the top end of the drain pipe is located above the top plate.

[0010] Further, a pipe joint for connecting a drainage pump is installed at the top end of the drain pipe.

[0011] Further, a flap door is installed at the position of the inlet and outlet. The flap door has a closed state of covering the inlet and outlet and an open state of allowing personnel to enter and exit the prefabricated body after being opened.

[0012] Further, a standing platform for personnel to stand on is arranged in at least one prefabricated body, and the top surface of the standing platform is higher than the bottom plate of the prefabricated body.

[0013] Furthermore, at least two standing platforms are provided, and the top surfaces of the standing platforms are arranged in sequence from high to low.

[0014] Furthermore, the standing platform is a folding operation platform installed on the side plate of the prefabricated body. The folding operation platform has an unfolded state for personnel to stand when unfolded and a folded state arranged closely against the side plate after folding.

[0015] Furthermore, both prefabricated bodies are rectangular box structures, and each of the side plates of the two prefabricated bodies has three, and the three side plates are vertically connected in sequence.

[0016] Furthermore, the volumes of the two prefabricated bodies are equal. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of an embodiment of the prefabricated wellhead equipment protection device of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the first prefabricated body in the embodiment of the prefabricated wellhead equipment protection device of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the second prefabricated body in the embodiment of the prefabricated wellhead equipment protection device of the present utility model.

[0020] In the figure: 1. First prefabricated body; 11. First top plate; 12. First bottom plate; 13. First front side plate; 14. First left side plate; 15. First right side plate; 2. Second prefabricated body; 21. Second top plate; 22. Second bottom plate; 23. Second left side plate; 24. Second right side plate; 25. Second rear side plate; 3. Avoidance opening; 31. Wellhead process; 4. Inlet and outlet; 5. Steel frame ladder; 6. Sump; 7. Drain pipe; 8. Pipe joint; 9. Flap; 10. Folding operation platform. Detailed Description of the Embodiment

[0021] The features and performances of the present utility model will be further described in detail below in combination with the embodiments.

[0022] In view of the technical problems existing in the prior art, the basic technical concept of the present utility model is as follows: The prefabricated wellhead equipment protection device includes two prefabricated bodies arranged in the wellhead foundation pit. Both prefabricated bodies are box structures with openings on only one side, and both prefabricated bodies include a top plate, a bottom plate, and side plates. The open ends of the two prefabricated bodies can be butt-jointed together to form a cover body that covers the equipment to be monitored at the wellhead. Avoidance openings for avoiding the wellhead process are respectively provided on the top plates and bottom plates of the two prefabricated bodies to ensure that when installing, the two prefabricated bodies can avoid the wellhead process and be smoothly butt-jointed. An inlet and outlet for personnel to enter and exit the prefabricated body are provided on the top plate of at least one prefabricated body, and a ladder extending towards the bottom plate is arranged at the position of the inlet and outlet. When it is necessary to monitor and operate the equipment to be monitored inside the cover, personnel can enter the cover body through the inlet and outlet and the ladder, and after completing the detection and operation, come out through the ladder from the inlet and outlet. Thus, the two prefabricated bodies can be prefabricated in advance. During installation, the two prefabricated bodies are directly placed into the foundation pit and smoothly butt-jointed with the help of the avoidance openings to form a cover body, avoiding interference with the wellhead process, and covering the equipment to be monitored at the wellhead inside the cover body. During use, personnel can enter and exit the cover body through the inlet and outlet and the ladder to realize the detection and operation of relevant equipment. Therefore, the construction period can be greatly shortened, the injection-production well can be quickly restored to production use, and the impact on production is reduced.

[0023] An embodiment of the prefabricated wellhead equipment protection device in the present utility model:

[0024] As Figure 1 shown, the prefabricated wellhead equipment protection device includes two prefabricated bodies, namely the first prefabricated body 1 and the second prefabricated body 2. The first prefabricated body 1 and the second prefabricated body 2 are arranged front and back in the wellhead foundation pit. In this embodiment, the volumes of the two prefabricated bodies are equal, which is convenient for production. The first prefabricated body 1 and the second prefabricated body 2 are both box structures with openings on only one side. During use, the open ends of the two prefabricated bodies are butt-jointed, so that the first prefabricated body 1 and the second prefabricated body 2 form a cover body that covers the equipment to be monitored at the wellhead. The butt-jointed part can be fixed by welding or bolts and other fixing methods to combine the two prefabricated bodies into a complete protection device. Thus, the first prefabricated body 1 and the second prefabricated body 2 can be prefabricated in advance before use. During use, the first prefabricated body 1 and the second prefabricated body 2 can be directly installed in the foundation pit to form a protection device and establish an operation space. The structure is simple, the installation is convenient, the time is saved, and thus the impact on production is reduced.

[0025] As Figures 1 - 3 shown, both the first prefabricated body 1 and the second prefabricated body 2 include a top plate, a bottom plate, and side plates. In this embodiment, as Figures 1 - 3As shown, both prefabricated bodies are rectangular box structures, and each of the side plates of the two prefabricated bodies has three, and the three side plates are vertically connected in sequence. The first prefabricated body 1 includes a first top plate 11, a first bottom plate 12, a first front side plate 13, a first left side plate 14, and a first right side plate 15. The second prefabricated body 2 includes a second top plate 21, a second bottom plate 22, a second left side plate 23, a second right side plate 24, and a second rear side plate 25.

[0026] The top plate of at least one of the first prefabricated body 1 and the second prefabricated body 2 is a grid plate, so that the space inside the enclosure is communicated with the outside world, and it plays a role in ventilation, avoiding the formation of an airtight space around the equipment to be monitored, and reducing potential safety hazards caused by gas accumulation. In this embodiment, both the first top plate 11 and the second top plate 21 are grid plates. Both the first top plate 11 and the second top plate 21 are flush with the ground, providing an operating platform for personnel to operate the relevant wellhead processes on the ground. The first top plate 11, the second top plate 21, the first bottom plate 12, and the second bottom plate 22 are respectively provided with avoidance openings 3 for avoiding the wellhead process 31 during docking, so as to ensure that the first prefabricated body 1 and the second prefabricated body 2 can be smoothly docked and connected. As Figure 1 shown, only part of the wellhead process 31 is shown in the figure, and the remaining wellhead processes 31 to be monitored and operated not shown in the figure are located inside the first prefabricated body 1 and the second prefabricated body 2.

[0027] A sump is provided on the bottom plate of at least one of the first prefabricated body 1 and the second prefabricated body 2, and a drain pipe penetrating through the top plate is fixed on the top plate. The bottom end of the drain pipe extends into the sump, and the top end of the drain pipe is located above the top plate. In this embodiment, as Figure 1 and Figure 2 shown, only the first prefabricated body 1 is provided with a corresponding sump 6 and a drain pipe 7. The sump 6 is arranged at a corner of the first bottom plate 12 close to the first left side plate 14 and the first front side plate 13 for collecting water inside the protection device. A pipe joint 8 for connecting a drainage pump is installed at the top end of the drain pipe 7, which can connect the drain pipe 7 with the suction port of the drainage pump. When there is water accumulation inside the protection device due to rainfall or ground seepage, etc., the water body can converge in the sump 6, and the water can be pumped out by the drainage pump, reducing the influence of corrosion factors on the wellhead process.

[0028] A standing platform for personnel to stand is provided inside at least one of the first prefabricated body 1 and the second prefabricated body 2, and the top surface of the standing platform is higher than the bottom plate of the prefabricated body. As Figure 2As shown, in this embodiment, only a standing platform is provided inside the first prefabricated body 1. The top surface of the standing platform is higher than the first bottom plate 12, enabling the operator to stand on the standing platform to operate and monitor the equipment at a high position. At least two standing platforms are provided, and the top surfaces of the standing platforms are arranged in order from high to low. In this embodiment, two standing platforms are provided, and both standing platforms are set as folding operation platforms 10 and are both installed on the first front side plate 13, and the structures of the two folding operation platforms 10 are the same.

[0029] The front sides of the two folding operation platforms 10 are both hinged at appropriate heights on the first front side plate 13, and folding support feet are provided on the rear sides. The folding support feet of the folding operation platforms 10 are arranged on the first front side plate 13 to ensure the level and stability of the two folding operation platforms 10. The heights of the two folding operation platforms 10 are different to ensure that all equipment to be monitored can be monitored. The folding operation platform 10 has an unfolded state for personnel to stand on when unfolded and a folded state where it is arranged close to the first front side plate 13 after folding. During use, the required folding operation platform 10 can be unfolded, and at this time, personnel can stand on the folding operation platform 10. After use, the folding operation platform 10 can be folded to be close to the first front side plate 13, saving space and not affecting other operations.

[0030] An inlet and outlet for personnel to enter and exit the prefabricated body is provided on the top plate of at least one of the first prefabricated body 1 and the second prefabricated body 2. In this embodiment, as Figure 3 shown, only an inlet and outlet 4 is provided on the top plate of the second prefabricated body 2. A trap door 9 is installed at the position of the inlet and outlet 4. The trap door 9 is hinged to the second top plate 21 through a hinge and can be flipped 180° to ensure that personnel can enter the protection device smoothly. During use, the trap door 9 can be opened to be in an open state. After use, the trap door 9 can cover the inlet and outlet 4 to be in a closed state. A ladder extending towards the second bottom plate 22 is provided at the inlet and outlet 4. In this embodiment, the ladder is set as a steel frame ladder 5. In other embodiments, it can also be set as a staircase, a telescopic ladder, etc. During use, personnel can open the trap door 9 and enter the protection device along the steel frame ladder 5 at the inlet and outlet 4, and climb out of the protection device along the steel frame ladder 5 after completing the operation.

[0031] The installation and use process of the prefabricated wellhead equipment protection device in the present utility model is as follows: After digging a foundation pit, the prefabricated first precast body 1 and second precast body 2 made in advance are successively placed into the foundation pit. The foundation pit needs to be a bit larger so that there is enough space between the open ends of the first precast body 1 and the second precast body 2 to avoid the wellhead process 31. Then, the first precast body 1 and the second precast body 2 are butt-jointed and connected to form a cover body, and the equipment to be monitored is covered inside the cover body. Finally, the space between the outside of the cover body and the wellhead foundation pit is backfilled to complete the installation of the protection device. When it is necessary to detect and operate the relevant equipment inside the cover body, the personnel can flip the flap 9 to open the inlet and outlet 4, enter the cover body by means of the steel frame ladder 5, then unfold the two folding operation platforms 10 to detect and operate the equipment at different heights. After completion, fold up the two folding operation platforms 10 and hang them on the first front side plate 13. Subsequently, go out through the steel frame ladder 5, and finally close the flap 9 to complete the detection and operation.

[0032] In other embodiments, the volumes of the two precast bodies may not be the same. It is possible to make the volume of the first precast body larger than that of the second precast body, and of course, it is also possible to make the volume of the second precast body larger than that of the first precast body.

[0033] In other embodiments, when setting the structures of the two precast bodies, the side plates of the two precast bodies can both be set to one. At this time, the side plates of the two precast bodies are both arc-shaped plates, each precast body is in a semi-cylindrical shape, the top plate and bottom plate of each precast body are semi-circular plates, and a hollow cylindrical structure is formed after the two precast bodies are butt-jointed and connected.

[0034] In other embodiments, the standing platform can be set as a flat plate and fixedly connected to the side plate for personnel to stand on. At this time, the flat plate cannot be folded.

[0035] In other embodiments, when setting the number of standing platforms, the standing platform can be set to a number greater than two, such as three, four, etc.; in other embodiments, the standing platform can also be set to one.

[0036] In other embodiments, when setting the standing platform, a standing platform can be set in both of the two precast bodies, and the top surface of the standing platform is respectively higher than the bottom plate of the corresponding precast body; it is also possible to set a standing platform only in the second precast body, and the top surface of the standing platform is higher than the bottom plate of the second precast body.

[0037] In other embodiments, when setting the position of the standing platform, the standing platform can be fixed on the bottom plate of the precast body. At this time, the standing platform is a box structure, and the number of standing platforms can be set to at least two, such as two, three, four, etc., and the standing platforms are arranged in order from high to low; in other embodiments, the standing platform can also be set to only one.

[0038] In other embodiments, the standing platform may not be provided. In this case, the height of the device to be monitored is relatively low, and personnel can detect and operate relevant devices without the aid of a standing platform.

[0039] In other embodiments, the trap door may not be provided. In this case, the inlet and outlet positions of the precast body are directly open.

[0040] In other embodiments, the pipe joint may not be installed at the top end of the drain pipe. In this case, according to the actual usage situation, the user needs to configure the pipe joint by themselves to connect the drain pipe to the drain pump; in other embodiments, the pipe joint may also not be provided. In this case, the drain pipe can be welded to the inlet end of the drain pump, or the drain pipe can be connected to the drain pump through a flange structure, screw thread, etc.

[0041] In other embodiments, when setting the sump, sump pits can be provided on the bottom plates of both precast bodies, and corresponding drain pipes penetrating through the top plates are fixed on the top plates of both precast bodies. The bottom ends of the drain pipes extend into the corresponding sump pits, and the top ends of the drain pipes are respectively located above the corresponding top plates; alternatively, a sump pit can be provided only on the bottom plate of the second precast body, and the drain pipe can be provided accordingly.

[0042] In other embodiments, when setting the top plate of the precast body, only the top plate of the first precast body or the second precast body can be set as a grid plate; alternatively, the top plates of both precast bodies can not be set as grid plates but be solid plates. In this case, ventilation holes can be provided on the top plate of one or both precast bodies to communicate the space inside the cover with the outside.

[0043] In other embodiments, when setting the inlet and outlet, inlets and outlets can be provided on the top plates of both precast bodies, and ladders extending towards the bottom plates of the corresponding precast bodies are respectively provided at the two inlet and outlet positions; alternatively, an inlet and outlet can be provided only on the top plate of the first precast body, and a ladder extending towards the bottom plate of the first precast body is provided at the inlet and outlet position.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions described in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A prefabricated wellhead equipment protection device, characterized in that, It includes two prefabricated bodies for being arranged in a wellhead foundation pit. Both of the two prefabricated bodies are box structures with openings only on one side, and both include a top plate, a bottom plate and side plates. The open ends of the two prefabricated bodies are used for butt-joint connection to form a cover body for covering the wellhead equipment to be monitored. Avoidance openings for avoiding the wellhead process during butt-joint are respectively provided on the top plates and bottom plates of the two prefabricated bodies. An inlet and outlet for personnel to enter and exit the prefabricated body is provided on the top plate of at least one prefabricated body, and a ladder extending towards the bottom plate is arranged at the position of the inlet and outlet.

2. The prefabricated wellhead equipment protection device according to claim 1, characterized in that, The top plates of at least one prefabricated body are all grid plates to enable the space inside the cover body to communicate with the outside.

3. The prefabricated wellhead equipment protection device according to claim 2, wherein, A sump is arranged on the bottom plate of at least one prefabricated body, and a drain pipe penetrating through the top plate is fixed on the top plate. The bottom end of the drain pipe extends into the sump, and the top end of the drain pipe is located above the top plate.

4. The prefabricated wellhead equipment protection device according to claim 3, characterized in that, A pipe joint for connecting a drainage pump is installed at the top end of the drain pipe.

5. The prefabricated wellhead equipment protection device according to any one of claims 1-4, characterized in that, A flap is installed at the position of the inlet and outlet. The flap has a closed state of covering the inlet and outlet and an open state for personnel to enter and exit the prefabricated body after being opened.

6. The prefabricated wellhead equipment protection device according to any one of claims 1-4, characterized in that, At least one standing platform for personnel to stand on is arranged inside the prefabricated body, and the top surface of the standing platform is higher than the bottom plate of the prefabricated body.

7. The prefabricated wellhead equipment protection device according to claim 6, characterized in that, There are at least two standing platforms, and the top surfaces of the standing platforms are arranged in order from high to low.

8. The prefabricated wellhead equipment protection device according to claim 6, characterized in that, The standing platform is a folding operation table installed on the side plate of the prefabricated body. The folding operation table has an unfolded state for personnel to stand on when unfolded and a folded state of being arranged closely against the side plate after being folded.

9. The prefabricated wellhead equipment protection device according to any one of claims 1-3, characterized in that, Both of the two prefabricated bodies are rectangular box structures, and each of the side plates of the two prefabricated bodies has three, and the three side plates are vertically connected in sequence.

10. The prefabricated wellhead equipment protection device according to any one of claims 1-3, characterized in that, The volumes of the two prefabricated bodies are equal.

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