Wellhead pressure control device
By designing a wellhead pressure control device including main intake pipe, main exhaust pipe and multi-group diverter pipeline, the problems of slow response speed, low control accuracy and poor safety of traditional devices are solved, and higher safety and production efficiency are achieved.
Patent Information
- Application Number
- CN202422349280.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Traditional wellhead pressure control devices have slow response speed, low control accuracy and poor safety, making it difficult to meet the accuracy and flexibility requirements of complex geological conditions and variable mining requirements.
A wellhead pressure control device including the main intake pipe, the main exhaust pipe and a multi-group diverter pipeline is designed. The diverter pipeline is equipped with a safety valve, a flow control valve and a buffer, and is equipped with a pressure relief system and a diversion bucket.
The device can quickly respond and effectively release abnormally raised pressure inside the system, significantly improving the safety of the system, reducing production interruptions and equipment failures caused by pressure fluctuations, and improving production efficiency and output.
Smart Images
Figure CN222962843U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil and gas development, and particularly relates to a wellhead pressure control device. Background Technique
[0002] During the development of oil and gas fields, the control of wellhead pressure is an important link to ensure safe production and efficient operation. Wellhead pressure is usually affected by various factors, such as formation pressure, production rate, sealing performance of wellhead equipment, etc. If the wellhead pressure is too high, it may cause equipment damage, leakage and even safety accidents; while too low pressure may affect oil and gas production and production efficiency. Therefore, designing a set of efficient and reliable wellhead pressure control devices is crucial for the production management of oil and gas fields.
[0003] Traditional wellhead pressure control devices often adopt a single pipeline system, and control the intake and exhaust gas volumes by adjusting the valve opening to achieve pressure stability. However, this method has many deficiencies, such as slow response speed, low control accuracy, poor safety, etc. Especially when facing complex geological conditions and changing production requirements, the single pipeline system is difficult to meet the accuracy and flexibility requirements of wellhead pressure control. Content of the Utility Model
[0004] The utility model aims at the technical problems existing in the prior art, and provides a wellhead pressure control device to solve the problem of poor stability of wellhead oil and gas pressure control.
[0005] The technical solution of the utility model to solve the above technical problems is as follows: a wellhead pressure control device, including a main intake pipeline and a main exhaust pipeline, the main intake pipeline is reserved with an intake port, and the main exhaust pipeline is reserved with an exhaust port; a multi-component flow diversion pipeline is arranged between the main intake pipeline and the main exhaust pipeline; a safety valve and a flow control valve are successively installed on the flow diversion pipeline.
[0006] On the basis of the above technical solution, the utility model can also be improved as follows.
[0007] Further, two groups of safety valves are provided along the intake end and the exhaust end of the flow diversion pipeline.
[0008] Further, the flow control valve includes a first-stage control valve at the front end and a second-stage control valve at the rear end.
[0009] Further, a buffer is also provided on the flow diversion pipeline behind the second-stage control valve, and a buffer chamber communicating with the flow diversion pipeline and having a cross-sectional area larger than that of the flow diversion pipeline is formed in the buffer.
[0010] Furthermore, pressure relief branch pipes are provided on one side of both the main intake pipe and the main exhaust pipe, and pressure relief valves are installed on the pressure relief branch pipes; a main pressure relief pipe is installed between the two pressure relief branch pipes, and a pressure relief port is reserved on the main pressure relief pipe.
[0011] Furthermore, a diversion hopper is provided at the intake port of the main intake pipe, and the inner diameter of the diversion hopper gradually narrows from the inlet to the intake port of the main intake pipe.
[0012] Furthermore, a filter box is further provided at the inlet of the diversion hopper, and a filter net is installed in the filter box.
[0013] Moreover, the wellhead pressure control device provided by the present utility model has at least the following beneficial effects compared with the prior art:
[0014] 1. By providing double safety valves at the intake end and the exhaust end of the shunt pipeline, and configuring a pressure relief system on the main intake pipe and the main exhaust pipe, the device can quickly respond and effectively release the abnormally increased pressure inside the system, thereby significantly improving the safety of the system and preventing equipment damage and safety accidents.
[0015] 2. Through fine flow control and effective pressure management, the device reduces production interruptions and equipment failures caused by pressure fluctuations, thereby improving production efficiency and output. At the same time, it reduces oil and gas leakage and losses caused by pressure problems, improving resource utilization rate and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0017] In the drawings, the list of components represented by each reference numeral is as follows:
[0018] 1. Main intake pipe; 2. Main exhaust pipe; 3. Shunt pipeline; 4. Safety valve; 5. Flow control valve; 6. Buffer; 7. Pressure relief branch pipe; 7.1. Pressure relief valve; 8. Main pressure relief pipe; 9. Diversion hopper; 10. Filter box; 10.1. Filter net. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The principles and features of the present utility model will be described below with reference to the drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.
[0020] It should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" in the terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For those of ordinary skill in the art, the specific meanings of such terms in this patent can be understood according to specific circumstances.
[0021] As shown Figure 1 in the figure, the wellhead pressure control device of the present utility model includes a main intake pipeline 1 and a main exhaust pipeline 2. The main intake pipeline 1 is reserved with an intake port, and the main exhaust pipeline 2 is reserved with an exhaust port; a multi-component flow diversion pipeline 3 is arranged between the main intake pipeline 1 and the main exhaust pipeline 2; a safety valve 4 and a flow control valve 5 are successively installed on the flow diversion pipeline 3.
[0022] As an implementation manner, two groups of safety valves 4 are provided along the intake end and the exhaust end of the flow diversion pipeline 3. One group of safety valves 4 is arranged at each of the intake end and the exhaust end of the flow diversion pipeline 3. This dual protection mechanism greatly improves the safety of the system. When the internal pressure of the system rises abnormally, whether due to excessive intake volume or blocked exhaust, the safety valve can quickly respond and open to release the excess pressure.
[0023] Specifically, the flow control valve 5 includes a primary control valve at the front end and a secondary control valve at the rear end. The primary control valve is used for preliminary adjustment and can roughly adjust the gas flow rate through the flow diversion pipeline as needed. The secondary control valve then makes more refined adjustments on this basis to meet the higher requirements for flow control.
[0024] In addition, a buffer 6 is further provided on the flow diversion pipeline 3 behind the secondary control valve. A buffer chamber communicating with the flow diversion pipeline 3 and having a cross-sectional area larger than that of the flow diversion pipeline 3 is formed inside the buffer 6; the design enables the buffer to act like a "reservoir" to temporarily store and release gas, thereby reducing the impact of gas flow and pressure fluctuations. When the gas enters the buffer through the secondary control valve, due to the larger cross-sectional area of the buffer chamber, the gas flow rate will slow down, and the pressure will also be reduced and stabilized to a certain extent.
[0025] As an implementation manner, pressure relief branch pipes 7 are arranged on one side of both the main intake pipeline 1 and the main exhaust pipeline 2, and a pressure relief valve 7.1 is installed on the pressure relief branch pipe 7; a main pressure relief pipe 8 is installed between the two pressure relief branch pipes 7, and the main pressure relief pipe 8 is reserved with a pressure relief port.
[0026] When the internal pressure of the main intake pipeline 1 rises abnormally, the pressure reaching the preset threshold will trigger the opening of the pressure relief valve 7.1 on the pressure relief branch pipe 7 on this side. In this way, the excess pressure gas can enter the pressure relief branch pipe through this pressure relief valve and be further discharged to the external environment through the pressure relief port of the main pressure relief pipe 8, thereby quickly reducing the pressure in the main intake pipeline.
[0027] Similarly, if the internal pressure of the main exhaust pipeline 2 is too high, its corresponding pressure relief branch pipe 7 and pressure relief valve 7.1 will also be activated to release the excess pressure to the outside.
[0028] The setting of the pressure relief system is an important safety redundancy design in the wellhead pressure control device. Even when the shunt pipeline 3 and the safety valve 4 and flow control valve 5 thereon fail or cannot meet the pressure relief requirements, the pressure relief system can work independently to ensure that the internal pressure of the system will not continue to rise to a dangerous level.
[0029] The pressure relief valve 7.1 can adopt automated mechanisms such as spring loading or hydraulic drive, and can quickly open when the pressure reaches the preset threshold to achieve rapid pressure relief.
[0030] As an implementation method, a diversion hopper 9 is provided at the air inlet of the main intake pipe 1, and the inner diameter of the diversion hopper 9 gradually narrows from the inlet to the air inlet of the main intake pipe 1.
[0031] Specifically, a filter box 10 is further provided at the inlet of the diversion hopper 9, and the filter box 10 is equipped with a filter net 10.1.
[0032] The design of the diversion hopper 9 cleverly utilizes the principle of fluid mechanics, and its inner diameter gradually narrows from the inlet to the air inlet of the main intake pipe 1. The filter net 10.1 can effectively filter out impurities, particulate matters, dust, etc. in the incoming gas, preventing these impurities from entering the subsequent equipment and pipelines, causing blockage or wear; through the filtering effect, the filter box and the filter net can protect key components in the wellhead pressure control device, such as valves, sensors, etc., from being invaded by impurities and extend the service life of the equipment.
[0033] The working principle of the present utility model is as follows:
[0034] I. Overall structure
[0035] This device mainly consists of a main intake pipe 1, a main exhaust pipe 2, and a multi-component shunt pipeline 3 provided between the two. The main intake pipe is responsible for receiving external gas or oil-gas mixture, while the main exhaust pipe is used for discharging the treated gas or oil-gas.
[0036] II. Shunt and control
[0037] Shunt function: The multi-component shunt pipeline provided between the main intake pipe and the main exhaust pipe realizes the shunt treatment of gas. This design helps to evenly distribute the gas flow rate, improve the treatment efficiency, and reduce the pressure fluctuation caused by uneven flow rate.
[0038] Safety valve and flow control valve: On each shunt pipeline, a safety valve 4 and a flow control valve 5 are successively installed. As a safety protection device, the safety valve can automatically open when the pressure exceeds the set value to release the excess pressure and prevent equipment damage or accidents. The flow control valve is used to precisely adjust the gas flow rate passing through the shunt pipeline to meet different production requirements.
[0039] Safety valves: Usually two sets are provided, located at the intake end and the exhaust end of the shunt pipeline respectively, to provide more comprehensive safety protection.
[0040] Flow control valve: It includes a primary control valve at the front end and a secondary control valve at the rear end, and more precise flow regulation is achieved through two-stage control.
[0041] III. Buffering and pressure relief
[0042] Buffer: A buffer 6 is also provided on the shunt pipeline behind the secondary control valve. A buffer chamber is formed inside it, which is connected to the shunt pipeline and has a cross-sectional area larger than that of the shunt pipeline. The main function of the buffer is to slow down the impact of gas flow, reduce pressure fluctuations, and improve the stability and safety of the system.
[0043] Pressure relief system: Pressure relief branches 7 are provided on one side of the main intake pipeline and the main exhaust pipeline, and pressure relief valves 7.1 are installed on them. When the internal pressure of the system exceeds the set value, the pressure relief valve will automatically open, and the excess pressure will be discharged through the pressure relief branch and the main pressure relief pipe 8 to ensure the safe operation of the system.
[0044] IV. Intake optimization
[0045] Flow guide hopper and filter box: A flow guide hopper 9 is provided at the intake port of the main intake pipeline, and its inner diameter gradually narrows from the inlet to the intake port of the main intake pipeline, which helps to guide the gas into the pipeline smoothly and reduce vortex and turbulence phenomena. At the same time, a filter box 10 is provided at the inlet of the flow guide hopper, and a filter screen 10.1 is installed to filter out impurities and particulate matters in the gas, protecting the subsequent equipment and pipelines from wear and blockage.
[0046] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Unless otherwise clearly specified and limited, the terms "install", "connect", "couple" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0047] Although the preferred embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic inventive concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications that fall within the scope of the present utility model.
[0048] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.
Claims
1. A wellhead pressure control device, characterized in that: The invention comprises a main air intake pipeline (1) and a main exhaust pipeline (2), wherein the main air intake pipeline (1) is provided with an air intake port, and the main exhaust pipeline (2) is provided with an exhaust port; a plurality of groups of flow distribution pipelines (3) are arranged between the main air intake pipeline (1) and the main exhaust pipeline (2); and a safety valve (4) and a flow control valve (5) are arranged in sequence on the flow distribution pipeline (3).
2. The wellhead pressure control device according to claim 1, characterized in that: The safety valve (4) is provided with two groups along the air inlet end and the air outlet end of the diversion pipeline (3).
3. The wellhead pressure control device according to claim 2, characterized in that: The flow control valve (5) comprises a primary control valve at the front end and a secondary control valve at the rear end.
4. The wellhead pressure control device according to claim 3, characterized in that: The diverter pipeline (3) is also provided with a buffer (6) located after the secondary control valve, and a buffer chamber is formed in the buffer (6) which is in communication with the diverter pipeline (3) and has a cross-sectional area larger than the cross-sectional area of the diverter pipeline (3).
5. The wellhead pressure control device according to claim 1, characterized in that: A pressure relief branch pipe (7) is provided on one side of the main air intake pipe (1) and the main exhaust pipe (2), and a pressure relief valve (7.1) is installed on the pressure relief branch pipe (7); a main pressure relief pipe (8) is installed between the two pressure relief branch pipes (7), and a pressure relief port is reserved in the main pressure relief pipe (8).
6. The wellhead pressure control device according to claim 1, characterized in that: A flow guide scoop (9) is arranged at the air inlet of the main air inlet pipeline (1), and the inner diameter of the flow guide scoop (9) gradually narrows along the inlet toward the air inlet of the main air inlet pipeline (1).
7. The wellhead pressure control device according to claim 6, characterized in that: A filter box (10) is also provided at the inlet of the guide hopper (9), and the filter box (10) is equipped with a filter screen (10.1).