Single-heel connecting method for prefabricated cement pipe of air compression energy storage warehouse

Abstract

The invention relates to an air compression energy storage warehouse prefabricated cement pipe single-heel connecting method which comprises the following specific steps that S1, a plurality of prefabricated cement pipes are conveyed to a pipe body probe hole, and the prefabricated cement pipes are distributed side by side; s2, the multiple prefabricated cement pipes are taken out of the pipe body probe holes in sequence and placed into a well hole; and S3, the multiple prefabricated cement pipes are sequentially connected and communicate with one another. The method aims at solving the problem that a conventional metal sleeve of an existing air compression energy storage warehouse shaft is high in oxygen corrosion rate under high oxygen partial pressure, the technical innovation of materials is considered, the metal sleeve is replaced with the prefabricated cement pipe, and the effects of supporting the well wall, storing injection and production fluid, maintaining temperature and pressure and the like are achieved; the method plays a crucial role in maintaining the normal operation of the system and ensuring the storage efficiency and safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air compression energy storage library drilling engineering, in particular to a prefabricated cement pipe joint method for air compression energy storage library. BACKGROUND

[0002] Air compression energy storage technology is a technology with wide application prospects in the energy field. This technology mainly uses underground spaces with certain sealing and stability, such as salt rock cavities and aquifers, as containers for compressed air. In combination with ground compressors, the technology stores compressed air in the underground to make full use of surplus electricity in the power grid, or sends the compressed air in the underground to a turbine for power generation. The development of this technology not only reduces the demand for fossil fuels and coal, but also makes full use of electricity during the low valley period, while providing supplemental power during the peak period. The dual regulation function of this technology increases the peak shaving capacity of the power grid and the stability of power grid operation.

[0003] However, the high oxygen partial pressure in the air can cause corrosion of conventional metal casings, resulting in the failure of wellbore integrity. In order to ensure the stable operation of the air compression energy storage library, expensive iron-nickel or nickel-based alloys need to be used to meet engineering needs. Research shows that the corrosion resistance of cement pipes is significantly higher than that of conventional metal casings, and the technical requirements can also be met under the premise of reducing the engineering budget. However, the method for connecting prefabricated cement pipes as casings for air compression energy storage libraries is still not mature, and there is an urgent need for a prefabricated cement pipe joint method for air compression energy storage libraries. SUMMARY

[0004] The present application provides a prefabricated cement pipe joint method for air compression energy storage libraries, aiming to solve the problems in the prior art.

[0005] The technical solution of the present application to solve the above technical problems is as follows:

[0006] A prefabricated cement pipe joint method for air compression energy storage libraries, comprising the following specific steps:

[0007] S1: multiple prefabricated cement pipes are sent to the pipe body probe hole, and the multiple prefabricated cement pipes are distributed side by side;

[0008] S2: multiple prefabricated cement pipes are sequentially taken out from the pipe body probe hole and lowered into the wellbore;

[0009] S3: multiple prefabricated cement pipes are sequentially connected and communicated.

[0010] The beneficial effects of the present application are: the present application aims to solve the problem of high oxygen corrosion rate of the conventional metal casing of the existing air compression energy storage wellbore at high oxygen partial pressure, considers the technological innovation of the material, uses prefabricated cement pipes instead of metal casing, plays the effects of supporting the well wall, storing injection and production fluid and maintaining temperature and pressure, and plays a crucial role in maintaining normal operation of the system, ensuring storage efficiency and safety.

[0011] Based on the above technical scheme, the present application can be further improved as follows.

[0012] Further, in S1, a plurality of prefabricated cement pipes are sent to the pipe body probe hole by the transportation system one.

[0013] The beneficial effects of the above further scheme are simple method, high efficiency and saving of manpower and material resources by using the transportation system one to transport a plurality of prefabricated cement pipes.

[0014] Further, when the plurality of prefabricated cement pipes are sent to the pipe body probe hole by the transportation system one, the prefabricated cement pipes need to be rotated by 90°, so that the sockets of the prefabricated cement pipes are upward.

[0015] The beneficial effects of the above further scheme are that the prefabricated cement pipes are rotated by 90° in advance after being sent to the set position, so that the subsequent crane hoists the prefabricated cement pipes, and hoisting is convenient.

[0016] Further, in S2, when the prefabricated cement pipes are damaged, the damaged prefabricated cement pipes are sent to the pipe body disposal hole.

[0017] The beneficial effects of the above further scheme are that when the prefabricated cement pipes are damaged, the damaged prefabricated cement pipes are recycled by the pipe body disposal hole, and recycling is convenient.

[0018] Further, the damaged prefabricated cement pipes sent to the pipe body disposal hole are transported to the set position by the transportation system two.

[0019] The beneficial effects of the above further scheme are that the recycled prefabricated cement pipes are transported to the set position by the transportation system two after being sent to the pipe body disposal hole, and the efficiency is high and recycling is convenient.

[0020] Further, S0 is further included before S1: a plurality of prefabricated cement pipes are transported to the well site and placed horizontally side by side.

[0021] The beneficial effects of the above further scheme are that a plurality of prefabricated cement pipes are transported to the well site in advance and placed horizontally side by side, so as to facilitate subsequent pipe connection operation.

[0022] Further, in S2, the wellhead self-locking crane is used to take out and lower a plurality of prefabricated cement pipes from the pipe body probe hole into the wellbore one by one.

[0023] The advantage of adopting the above-mentioned further solution is that multiple precast cement pipes can be taken out from the pipe body probe hole and lowered into the wellbore in sequence using a wellhead self-locking crane, which is efficient and saves time and effort.

[0024] Furthermore, in step S3, multiple precast cement pipes are lowered into the wellbore, and adjacent precast cement pipes are threaded together.

[0025] The advantage of adopting the above-mentioned further solutions is that the precast cement pipes have a reasonable structural design, which facilitates subsequent pipe connection operations.

[0026] Furthermore, each of the precast cement pipes has a structure that is thicker at the top and thinner at the bottom, with internal threads at the top and external threads at the bottom.

[0027] The advantage of adopting the above-mentioned further solutions is that the precast cement pipes have a reasonable structural design, which facilitates subsequent pipe connection operations.

[0028] Furthermore, each of the precast cement pipes has a structure that is thinner at the top and thicker at the bottom, with external threads at the top and internal threads at the bottom.

[0029] The advantage of adopting the above-mentioned further solutions is that the precast cement pipes have a reasonable structural design, which facilitates subsequent pipe connection operations. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the precast cement pipe in this invention;

[0031] Figure 2 This is a schematic diagram of the transportation system of the precast cement pipe in this invention;

[0032] Figure 3 This is a top view of the drilling rig of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure at the probe hole in the tube body of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the wellhead self-locking crane used for lifting and lowering the pipe body in this invention;

[0035] Figure 6 This is a process diagram of fastening precast cement pipes in this invention;

[0036] Figure 7 This is a schematic diagram of the connection structure of the precast cement pipe in this invention.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1, rig floor; 2, base; 3, platform support; 4, pulley; 4.1, pulley one; 4.2, pulley two; 4.3, pulley three; 4.4, pulley four; 4.5, pulley five; 4.6, pulley six; 5, prefabricated cement pipe; 6, pipe body transportation protection device; 7, strip-shaped underground groove; 8, transportation track; 9, transportation system support pier; 10, pipe body disposal hole; 11, wellbore; 12, pipe body probe hole; 13, pipe body wellhead fixing device; 14, formation; 15, prefabricated leading shoe; 16, wellhead self-locking crane. DETAILED DESCRIPTION

[0039] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0042] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0043] Embodiment 1

[0044] As Figures 1 to 7 shown, the present embodiment provides a prefabricated cement pipe joint single-heel method for air compression energy storage, which comprises the following specific steps:

[0045] S1: multiple prefabricated cement pipes 5 are sent to the pipe body probe hole 12, and multiple prefabricated cement pipes 5 are distributed side by side;

[0046] S2: multiple prefabricated cement pipes 5 are sequentially taken out from the pipe body probe hole 12 and lowered into the wellbore 11;

[0047] S3: multiple prefabricated cement pipes 5 are sequentially connected and communicated.

[0048] The embodiment aims to solve the problem of high oxygen corrosion rate of conventional metal casing of air compression energy storage library wellbore at high oxygen partial pressure, considers the technical innovation of materials, uses prefabricated cement pipes to replace metal casing, plays a crucial role in maintaining normal operation of the system, ensuring storage efficiency and safety, and has the effects of supporting well wall, storing injection and production fluid and maintaining temperature and pressure.

[0049] Embodiment 2

[0050] In the embodiment, in S1, multiple prefabricated cement pipes 5 are sent to the pipe body probe hole 12 by the transportation system one.

[0051] The method is simple, multiple prefabricated cement pipes 5 are transported by the transportation system one, the efficiency is high, and manpower and material resources are saved.

[0052] Embodiment 3

[0053] In the embodiment, when multiple prefabricated cement pipes 5 are sent to the pipe body probe hole 12 by the transportation system one, the prefabricated cement pipes 5 need to be rotated by 90°, so that the sockets of the prefabricated cement pipes 5 are upward.

[0054] After the prefabricated cement pipes 5 are sent to the set position, they are rotated by 90° in advance, so that the subsequent crane can hoist the prefabricated cement pipes 5 conveniently.

[0055] According to the specific implementation of the embodiment, in the air compression energy storage library prefabricated cement pipe connection method, preferably, the transportation system can be installed by digging a strip-shaped underground groove, saving ground space.

[0056] According to the specific implementation of the embodiment, in the air compression energy storage library prefabricated cement pipe connection method, preferably, the transportation track and the pulley can be designed according to the layout of the well site.

[0057] According to the specific implementation of the embodiment, in the air compression energy storage library prefabricated cement pipe connection method, preferably, the prefabricated cement pipes are rotated by 90° when they arrive at the 4.2 pulley, so that their sockets are upward.

[0058] Embodiment 4

[0059] On the basis of the above-mentioned embodiments, in the present embodiment, the S2 further comprises: when the prefabricated cement pipe 5 is damaged, the damaged prefabricated cement pipe 5 is sent to the pipe body disposal hole 10.

[0060] When the prefabricated cement pipe 5 is damaged, the damaged prefabricated cement pipe 5 is recycled by using the pipe body disposal hole 10, which is convenient for recycling.

[0061] Embodiment 5

[0062] On the basis of Embodiment 4, in the present embodiment, the damaged prefabricated cement pipe 5 sent to the pipe body disposal hole 10 is transported to a designated position by the second transportation system.

[0063] The recycled prefabricated cement pipe 5 is transported to a designated position by the second transportation system after being sent to the pipe body disposal hole 10, which is efficient and convenient for recycling.

[0064] According to the specific implementation of the present embodiment, in the prefabricated cement pipe receiving and tracking method of the air compression energy storage library, preferably, due to the brittleness of the prefabricated cement pipe, cracks or partial breakage may occur during transportation, and this part of the prefabricated cement pipe can be directly recycled by the pipe body disposal hole.

[0065] According to the specific implementation of the present embodiment, in the prefabricated cement pipe receiving and tracking method of the air compression energy storage library, preferably, the wellhead self-locking crane should increase the contact area with the side wall of the prefabricated cement pipe as much as possible to reduce the lateral force on the pipe body.

[0066] In the present embodiment, the damaged prefabricated cement pipe 5 is recycled by the second transportation system, and in the S1, the plurality of prefabricated cement pipes 5 are sent to the pipe body probe hole 12 by the first transportation system. The above-mentioned first transportation system and the second transportation system are independent of each other and do not interfere with each other.

[0067] Alternatively, the above-mentioned first transportation system and the second transportation system can also be integrated, that is, the entire transportation system is used to send the plurality of prefabricated cement pipes 5 to the pipe body probe hole 12, and at the same time, the damaged prefabricated cement pipes 5 are recycled.

[0068] Embodiment 6

[0069] On the basis of the above-mentioned embodiments, in the present embodiment, the S1 further comprises S0: a plurality of prefabricated cement pipes 5 are transported to the well site and placed horizontally side by side.

[0070] A plurality of prefabricated cement pipes 5 are transported to the well site and placed horizontally side by side in advance to facilitate subsequent pipe receiving operations.

[0071] According to the specific implementation of the present embodiment, in the prefabricated cement pipe receiving and tracking method of the air compression energy storage library, preferably, the prefabricated cement pipes should be placed horizontally side by side as much as possible to avoid bumping during the process.

[0072] According to the specific embodiment of the present embodiment, in the air compression energy storage library prefabricated cement pipe joint single foot method, preferably, the pipe body transportation protection device mainly plays a protection role in the transportation process of the prefabricated cement pipe, and the shape is not limited.

[0073] Embodiment 7

[0074] On the basis of the above-mentioned embodiments, in the present embodiment, in S2, the wellhead self-locking crane 16 is used to take out and lower a plurality of prefabricated cement pipes 5 from the pipe body probe hole 12 into the wellbore 11.

[0075] The scheme uses the wellhead self-locking crane 16 to take out and lower a plurality of prefabricated cement pipes 5 from the pipe body probe hole 12 into the wellbore 11, which is efficient and saves time and effort.

[0076] Embodiment 8

[0077] On the basis of the above-mentioned embodiments, in the present embodiment, in S3, among the plurality of prefabricated cement pipes 5 lowered into the wellbore 11, two adjacent prefabricated cement pipes 5 are threadedly connected.

[0078] The prefabricated cement pipe 5 is reasonably structured, facilitating subsequent pipe joint operations.

[0079] According to the specific embodiment of the present embodiment, in the air compression energy storage library prefabricated cement pipe joint single foot method, preferably, the wellhead self-locking crane has a make-up function, and the prefabricated cement pipes can be connected by threads.

[0080] According to the specific embodiment of the present embodiment, in the air compression energy storage library prefabricated cement pipe joint single foot method, preferably, when the pipe body wellhead fixing device is released, the make-up connection is ensured to be intact to prevent the casing from falling into the well bottom.

[0081] According to the specific embodiment of the present embodiment, in the air compression energy storage library prefabricated cement pipe joint single foot method, preferably, the threads of the prefabricated cement pipe spigot and the spigot end are connected to the steel structure inside by welding, and the interface is poured in the cement.

[0082] Embodiment 9

[0083] On the basis of embodiment 8, in the present embodiment, each prefabricated cement pipe 5 has a structure of a thick upper end and a thin lower end, an inner thread is arranged at the upper end, and an outer thread is arranged at the lower end.

[0084] In the scheme, the prefabricated cement pipe 5 is reasonably structured, facilitating subsequent pipe joint operations.

[0085] Embodiment 10

[0086] In this embodiment, each of the prefabricated cement pipes 5 has a structure of thin upper end and thick lower end, the upper end is provided with external threads, and the lower end is provided with internal threads.

[0087] In this scheme, the prefabricated cement pipe 5 is reasonably arranged in structure, facilitating subsequent pipe connecting operation.

[0088] The above embodiments 9 and 10 are parallel schemes.

[0089] The specific steps of the present application are as follows:

[0090] Step one: After the prefabricated cement pipes are transported to the well site, they are placed horizontally side by side, and the first prefabricated cement pipe is fixed in the pipe body transportation protection device.

[0091] Step two: The prefabricated cement pipes are transported to the pipe body probe hole under the action of the transportation system.

[0092] Step three: The wellhead self-locking crane lifts the prefabricated cement pipe from the pipe body probe hole and lowers it into the wellbore, and if the pipe body is damaged, it can be transported to the pipe body disposal hole.

[0093] Step four: The prefabricated cement pipes are connected through threads, the wellhead self-locking crane is used for make-up operation to connect the casing, and then the pipe body wellhead fixing device is released to connect the casing.

[0094] The prefabricated cement pipe of the present application is provided with a kind of air compression energy storage library prefabricated cement pipe and is connected with method, now the surface casing of the well is connected with process instruction.The prefabricated cement pipe transported to well site is placed horizontally side by side, and the prefabricated cement pipe fixed in the pipe body transportation protection device is moved to pulley two 4.2 from pulley one 4.1 along track, then is rotated 90 ° and makes the prefabricated cement pipe spout upward, and the spout downward.Waiting for the wellhead self-locking crane to lift it from the pipe body probe hole and lower it into the wellbore casing spout upper portion, if prefabricated cement pipe has damage, it can be recycled by pipe body disposal hole, if there is no damage, it is connected by thread make-up with the prefabricated cement pipe in wellbore.The pipe body wellhead fixing device is released, and the prefabricated cement pipe connected using the wellhead self-locking crane is continued to lower to a certain depth, and the pipe body wellhead fixing device is installed.At the same time, after the prefabricated cement pipe is completely separated from the pipe body transportation protection device, it continues to move along the track, passes through pulley three 4.3, pulley four 4.4, pulley five 4.5 and pulley six 4.6 respectively, and finally returns to pulley 4.1 to prepare the next prefabricated cement pipe to be fixed in the pipe body transportation protection device.

[0095] The derrick is arranged on the stratum 14, and mainly comprises a drilling platform 1, a base 2 and a platform support 3, and a pipe body disposal hole 10, a wellbore 11 and a pipe body probe hole 12 are arranged in parallel on the plane of the drilling platform 1. A wellhead self-locking crane 16 is installed on the top of the derrick, used for hoisting or lowering a prefabricated cement pipe 5 and a prefabricated shoe 15, and the prefabricated shoe 15 enters the well first, and the wellbore 11 is provided with a pipe body wellhead fixing device 13. The prefabricated cement pipe 5 is recovered through the pipe body disposal hole 10 when it is seriously damaged. A pulley two 4.2 is installed in the middle of the pipe body probe hole, and the pulley one 4.1, the pulley two 4.2, the pulley three 4.3, the pulley four 4.4, the pulley five 4.5, the pulley six 4.6, the pipe body transportation protection device 6, the transportation track 8 and the transportation system support pier 9 jointly constitute a pipe body transmission system, i.e. the above-mentioned transportation system, and the pipe body transmission system can be installed in the strip-shaped underground groove 7.

[0096] The application designs a prefabricated cement pipe single-shoulder connecting process method, which is based on the existing single-shoulder connecting technology and is more suitable for the single-shoulder connection of prefabricated cement pipes. The method has less extrusion effect on the side wall of the pipe body during the single-shoulder connection process, and thus has better protection effect.

[0097] The application aims to design an air compression energy storage library prefabricated cement pipe single-shoulder connecting method, and aims to solve the problem of high oxygen corrosion rate of the existing air compression energy storage library wellbore conventional metal casing at high oxygen partial pressure. The technical innovation of the material is considered, and the prefabricated cement pipe is used to replace the metal casing, which plays the effects of supporting the well wall, storing injection and production fluid and maintaining temperature and pressure. It plays a crucial role in maintaining the normal operation of the system, ensuring the storage efficiency and safety. However, there is no single-shoulder connecting process method for prefabricated cement pipes at present. Therefore, the application refers to the single-shoulder connecting method of the metal casing and proposes a prefabricated cement pipe single-shoulder connecting method to meet the engineering requirements.

[0098] It should be noted that all electronic components involved in the application use existing technology, and the above-mentioned components are electrically connected to the controller. The control circuit between the controller and each component is of existing technology.

[0099] It is obvious to those skilled in the art that the application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0100] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of prefabricated cement pipe joint single shoe for air compression energy storage, characterized by, The method comprises the following specific steps: S1: multiple prefabricated cement pipes (5) are sent to the pipe body probe hole (12) to arrange multiple prefabricated cement pipes (5) side by side; S2: multiple prefabricated cement pipes (5) are taken out from the pipe body probe hole (12) and lowered into the wellbore (11) in sequence; S3: multiple prefabricated cement pipes (5) are connected and communicated in sequence.

2. The method for connecting precast cement pipes to an air compressed energy storage silo according to claim 1, characterized in that: In S1, multiple prefabricated cement pipes (5) are sent to the pipe body probe hole (12) by a transportation system one.

3. The method of claim 2, wherein the method further comprises: When multiple prefabricated cement pipes (5) are sent to the pipe body probe hole (12) by the transportation system one, the prefabricated cement pipes (5) need to be rotated by 90°, so that the socket of the prefabricated cement pipe (5) faces upward.

4. The single foot method of air compression energy storage reservoir precast cement pipe jointing according to any one of claims 1-3, characterized in that, In S2, when the prefabricated cement pipe (5) is damaged, the damaged prefabricated cement pipe (5) is sent to the pipe body disposal hole (10).

5. The method of claim 4, wherein the method further comprises: The damaged prefabricated cement pipe (5) in the pipe body disposal hole (10) is transported to a designated position by a transportation system two.

6. The single foot method of air compression energy storage reservoir precast cement pipe jointing according to any one of claims 1-3, characterized in that, Before S1, S0 is further included: multiple prefabricated cement pipes (5) are transported to a well site and arranged horizontally side by side.

7. The single foot prefabricated cementitious air pressure energy storage tank pipe joint method according to any one of claims 1-3, characterized in that: In S2, a wellhead self-locking crane (16) is used to take out multiple prefabricated cement pipes (5) from the pipe body probe hole (12) and lower them into the wellbore (11) in sequence.

8. The single foot prefabricated cementitious air pressure energy storage tank pipe joint method according to any one of claims 1-3, characterized in that: In S3, among multiple prefabricated cement pipes (5) lowered into the wellbore (11), two adjacent prefabricated cement pipes (5) are threadedly connected.

9. The method of claim 8, wherein the method further comprises: Each prefabricated cement pipe (5) has a structure of thick upper end and thin lower end, the upper end is provided with internal threads, and the lower end is provided with external threads.

10. The method of claim 8, wherein the method further comprises: Each prefabricated cement pipe (5) has a structure of thin upper end and thick lower end, the upper end is provided with external threads, and the lower end is provided with internal threads.

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