Built-in gas lift valve
By designing a built-in gas lift valve, the problem that the existing external gas lift valve cannot be tied to the outer wall of the oil pipe and cannot be centered, achieving high-quality work and long service life, with significant economic benefits.
Patent Information
- Application Number
- CN202421434890.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing air lift valve is external, and cannot bind cables to the outer wall of the oil pipe, and the pipe body cannot be centered, resulting in a decrease in working quality and short service life.
A built-in air lift valve is designed. The air lift valve is installed inside the pipe body and is designed through the internal communication groove and the lateral communication hole to ensure that the fluid can only enter the air lift valve through the internal communication groove to avoid flow out.
The built-in installation of the air lift valve is realized, allowing cables to be tied to the outer wall of the oil pipe, and the pipe body works in the center, improving the working quality and service life, and having significant economic benefits.
Smart Images
Figure CN222991508U_ABST
Abstract
Description
Technical Field
[0001] The utility model is a device for oil production technology, which is an internal gas lift valve. Background Technique
[0002] The gas lift oil production technology has a history of more than one hundred years. In the main foreign oil-producing countries, gas lift oil production accounts for 15% of artificial lift oil production, and the liquid production volume of gas lift oil production accounts for 30% of the total mechanical production, ranking as the second largest artificial lift method. In China's Zhongyuan, Tarim, Tuha, Daqing, Liaohe, Sichuan, and the eastern South China Sea oil and gas fields, the gas lift oil production method has been successively adopted, and a certain scale of gas lift oil production has been initially formed.
[0003] Gas lift oil production is a mechanical oil production method that injects high-pressure gas from the ground into the well through the casing of the oil well, enters the tubing through the gas lift valve installed on the pipe string, and mixes with the well fluid in the tubing, reducing the density of the gas-liquid mixture in the tubing, thereby reducing the bottom-hole flowing pressure. Since gas lift can greatly reduce the bottom-hole flowing pressure, gas lift can also be used for acidizing, perforating, plugging removal and other process measure wells to quickly discharge waste liquid and prevent secondary pollution caused by waste liquid. Using it for acidizing, perforating, plugging removal and other process measure wells to quickly discharge waste liquid is called "hollowing out" on site.
[0004] In order to reduce the gas pressure during gas lift, multiple-stage gas lift valves need to be installed in the gas lift production tubing string. The gas pressure first opens the first-stage gas lift valve (starting pressure), reduces the pressure in the tubing above the first-stage gas lift valve, and then automatically opens the second-stage gas lift valve to reduce the pressure in the tubing above the second-stage gas lift valve until gas lift reaches the lowest-stage gas lift valve.
[0005] Existing gas lift valves are all external type, and their core components are installed on the outer wall of the pipe body. The problems are that, on the one hand, it cannot be used in combination with the process technology that requires bundling cables on the outer wall of the tubing, resulting in the inability to use process technologies such as water finding and testing; on the other hand, its pipe body cannot be in the central position of the oil well, causing some components on the pipe string to work eccentrically, affecting the working quality and reducing the service life. Summary of the Invention
[0006] The purpose of the utility model is to design an internal gas lift valve, which does not affect bundling cables externally, ensures that the pipe body can be in the central position in the oil well, and overcomes the problems existing in the existing gas lift pipe string.
[0007] The object of the present utility model is achieved as follows: It includes a pipe body and a gas lift valve. The gas lift valve has an internal communication groove. An over-flow channel and an installation hole are arranged inside the pipe body. The over-flow channel vertically penetrates through the pipe body, and the installation hole vertically penetrates through the pipe body. A lateral communication hole is arranged on the pipe body, and the lateral communication hole communicates with the installation hole. The gas lift valve is installed in the installation hole. After the gas lift valve is installed in the installation hole, both ends of the installation hole are blocked and sealed, so that the fluid flowing into the installation hole through the lateral communication hole can only enter the gas lift valve through the internal communication groove and cannot flow out through both ends of the installation hole.
[0008] The external thread of the gas lift valve is connected to the internal thread at the lower part of the installation hole, and the connection point is below the lateral communication hole.
[0009] An upper sealing ring is installed on the outer wall of the gas lift valve. The upper sealing ring is above the internal communication groove and the lateral communication hole, and the upper sealing ring seals the gap between the gas lift valve and the upper section of the installation hole.
[0010] A lower sealing ring is installed on the outer wall of the gas lift valve. The lower sealing ring is below the internal communication groove and the lateral communication hole, and the lower sealing ring seals the gap between the gas lift valve and the lower section of the installation hole.
[0011] The beneficial effect of the present utility model is that the gas lift valve is installed inside the pipe body, making the outside of the pipe body the same as that of an ordinary oil pipe. Cables can be bundled on the outer wall, and the pipe string will not be eccentric and is in a centered position. Therefore, the present utility model overcomes the problems existing in the prior art, can be used in conjunction with the process technology that requires bundling cables on the outer wall of the oil pipe. The pipe string works in a centered state, can ensure the working quality of the components on the pipe string, has a long service life, and has significant economic benefits. Description of the Drawings
[0012] Figure 1 It is a structural diagram of the present utility model. Detailed Description of the Specific Embodiment
[0013] The following will describe in detail the embodiments of the present utility model in conjunction with the attached Figure 1 Drawings.
[0014] By Figure 1It can be seen that the embodiments of the present utility model include a pipe body 1 and a gas lift valve 2. There is an internal communication groove 2-2 on the gas lift valve 2. An overcurrent channel 1-1 and a mounting hole 1-2 are arranged in the pipe body 1. The overcurrent channel 1-1 vertically penetrates the pipe body 1, and the mounting hole 1-2 vertically penetrates the pipe body 1. A lateral communication hole 1-3 is arranged on the pipe body 1, and the lateral communication hole 1-3 communicates with the mounting hole 1-2. The gas lift valve 2 is installed in the mounting hole 1-2. After the gas lift valve 2 is installed in the mounting hole 1-2, both ends of the mounting hole 1-2 are blocked and sealed, so that the fluid flowing into the mounting hole 1-2 through the lateral communication hole 1-3 can only enter the gas lift valve 2 through the internal communication groove 2-2 and cannot flow out through both ends of the mounting hole 1-2.
[0015] Preferably, the external thread of the gas lift valve 2 is connected to the internal thread at the lower part of the mounting hole 1-2, and the connection point is below the lateral communication hole 1-3, so that the gas lift valve 2 is fixedly installed in the mounting hole 1-2.
[0016] Preferably, a sealing ring 2-1 is installed on the outer wall of the gas lift valve 2. The upper sealing ring 2-1 is above the internal communication groove 2-2 and the lateral communication hole 1-3. The upper sealing ring 2-1 seals the gap between the gas lift valve 2 and the upper section of the mounting hole 1-2, so that the fluid flowing into the mounting hole 1-2 cannot flow out from its upper end.
[0017] Preferably, a lower sealing ring 2-3 is installed on the outer wall of the gas lift valve 2. The lower sealing ring 2-3 is below the internal communication groove 2-2 and the lateral communication hole 1-3. The lower sealing ring 2-3 seals the gap between the gas lift valve 2 and the lower section of the mounting hole 1-2, so that the fluid flowing into the mounting hole 1-2 cannot flow out from its lower end.
[0018] If the method of keeping the connection between the external thread of the gas lift valve 2 and the internal thread at the lower part of the mounting hole 1-2 sealed is adopted, the lower sealing ring 2-3 can be not installed.
[0019] Install several of the present utility models on the gas lift string (the installation quantity, position and spacing are determined by the well conditions), and cables can be bundled outside the string. When gas lift is needed, gas is injected into the casing, and the gas pressure is transmitted into the gas lift valve 2 through the lateral communication hole 1-3 and the internal communication groove 2-2, so that the gas lift valve 2 is opened and flows downward into the string for gas lift operation.
[0020] In the present utility model, if other methods are adopted to seal both ends of the mounting hole 1-2, it is also within the protection scope of the present utility model.
[0021] The installation hole 1-2 has an enlarged diameter section, so that the internal communication groove 2-2 is fully communicated with the lateral communication hole 1-3. The enlarged diameter section is located below the upper sealing ring 2-1 and above the lower sealing ring 2-3.
Claims
1. A built-in gas lift valve, comprising a pipe body (1) and a gas lift valve (2), wherein the gas lift valve (2) has an internal connecting groove (2-2), wherein: A flow passage (1-1) and a mounting hole (1-2) are arranged in the pipe body (1). The flow passage (1-1) vertically penetrates the pipe body (1). The mounting hole (1-2) vertically penetrates the pipe body (1). A lateral connecting hole (1-3) is arranged on the pipe body (1). The lateral connecting hole (1-3) communicates with the mounting hole (1-2). The gas lift valve (2) is installed in the mounting hole (1-2). After the gas lift valve (2) is installed in the mounting hole (1-2), both ends of the mounting hole (1-2) are blocked and sealed, so that the fluid flowing into the mounting hole (1-2) through the lateral connecting hole (1-3) can only enter the gas lift valve (2) through the internal connecting groove (2-2) and cannot flow out through the two ends of the mounting hole (1-2).
2. A built-in gas lift valve according to claim 1, characterized in that: The external thread of the gas lift valve (2) is connected to the internal thread at the lower part of the mounting hole (1-2), and the connection point is below the lateral connecting hole (1-3).
3. The built-in gas lift valve according to claim 1, characterized in that: An upper sealing ring (2-1) is installed on the outer wall of the gas lift valve (2). The upper sealing ring (2-1) is located above the internal connecting groove (2-2) and the lateral connecting hole (1-3). The upper sealing ring (2-1) seals the gap between the gas lift valve (2) and the upper section of the mounting hole (1-2).
4. The built-in gas lift valve according to claim 1, characterized in that: A lower sealing ring (2-3) is installed on the outer wall of the gas lift valve (2), and the lower sealing ring (2-3) is located below the internal connecting groove (2-2) and the lateral connecting hole (1-3). The lower sealing ring (2-3) seals the gap between the gas lift valve (2) and the lower section of the installation hole (1-2).