Pilot pressure equalizing drag reducing commutator

Abstract

The utility model discloses a pilot pressure equalization drag reduction reversing device, including liquid drive jar A and liquid drive jar B, and the upper end entrance of liquid drive jar A and liquid drive jar B is linked together through no. 1 power liquid pipeline, and the lower end entrance of liquid drive jar A and liquid drive jar B is linked together through no. 2 power liquid pipeline, and no. 1 power liquid pipeline and no. 2 power liquid pipeline are linked together through power pump, the top entrance between liquid drive jar A and liquid drive jar B is linked together through pressure equalization pipeline, is equipped with intelligent pressure equalization valve on pressure equalization pipeline, relate to oil and gas field well station oil and gas delivery technical field, and through the pilot pressure equalization valve of preposition instruction is started before the reversing valve starts and opens, the high pressure gas of high pressure tank top compression clearance is guided into low pressure jar, realizes the automatic closing of pressure equalization between double jar, then starts the reversing operation again, the pressure difference of reversing valve door shutter before and after is reduced greatly at this moment, and the reversing torque reduces, can realize the smooth operation, reduces the failure rate, can also improve the device working pressure difference greatly.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas transportation technology in oil and gas field well stations, specifically a pilot pressure equalization drag reduction and reversing device. Background Technology

[0002] Oil and gas transportation at oil and gas field well stations is the process of transporting oil and gas resources such as crude oil, formation water, and natural gas from underground wells to storage or processing sites via pipelines. Oil and gas pipeline transportation is an efficient mode of transport, reducing losses during the process and ensuring the safe and stable supply of oil and gas resources. Oil and gas pipelines are typically made of steel pipes or other pressure-resistant materials, possessing high strength and corrosion resistance. During pipeline transportation, natural formation energy is utilized for self-flowing or mechanical extraction to draw oil and gas resources from underground wells. After surface gas-liquid separation, the extracted gas is pressurized by pumps and compressors and then transported to the oil and gas field terminal processing station. Currently, the main extracted materials from oil fields include oil, natural gas, water, and multiphase flows mixed with silt and other substances. These multiphase mixtures must be transported to gas-liquid separators to separate the components before being pumped or compressed for further transportation.

[0003] However, during the separation of multiphase mixtures, the gas carries some liquid molecules into the compressor. The accumulation of these liquid molecules can easily cause liquid slugging and damage to the compressor. Furthermore, due to the incompressibility of liquids, they occupy space, preventing the compressor from operating efficiently and leading to reduced compressor efficiency. Chinese patent "CN114278863A" proposes a multiphase flow conveying device, including a first tank; a second tank; a reversing mechanism connected to the first and second tanks, used to drive the liquid in the first and second tanks to reciprocate, causing the first and second tanks to alternately form a vacuum suction chamber and / or a compression discharge chamber, thereby achieving continuous mixing and conveying of liquids, gases, or gas-liquid mixtures; and an output mechanism, including a first pipeline for conveying gas, a second pipeline for conveying liquid, and a control valve for controlling the opening and closing of the first and second pipelines. The system uses a reversing mechanism to drive the liquid in the first and second tanks to circulate back and forth, causing the first and second tanks to alternately form a vacuum suction chamber and / or a compression discharge chamber. The tank in the compression discharge chamber first discharges gas into the first pipeline, and when it is full of liquid, it overflows into the second pipeline, achieving multiphase flow separation and transportation. However, when the pressure difference between liquid-driven tank A and liquid-driven tank B increases, the reversing valve generates a huge load under the action of the pressure difference, increasing the reversing torque, requiring an auxiliary mechanism, increasing manufacturing costs, increasing the frequency of failures, reducing the operating rate, limiting the improvement of the device's working pressure difference capability, and reducing the reliability of the device operation. Utility Model Content

[0004] The purpose of this invention is to provide a pilot pressure equalization drag reduction commutation device to solve the problems mentioned in the background art.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A pilot pressure equalization drag reduction reversing device includes a liquid-driven tank A and a liquid-driven tank B. The upper inlets of the liquid-driven tank A and the liquid-driven tank B are connected by a first power fluid pipeline, and the lower inlets of the liquid-driven tank A and the liquid-driven tank B are connected by a second power fluid pipeline. The first power fluid pipeline and the second power fluid pipeline are connected by a power pump.

[0007] The top inlets of the liquid-driven tank A and the liquid-driven tank B are connected by a pressure equalization pipeline, which is equipped with an intelligent pressure equalization valve.

[0008] Preferably, the first power fluid pipeline is equipped with a first valve at the end near the liquid drive tank A, the second power fluid pipeline is equipped with a second valve at the end near the liquid drive tank A, the first power fluid pipeline is equipped with a third valve at the end near the liquid drive tank B, and the second power fluid pipeline is equipped with a fourth valve at the end near the liquid drive tank B.

[0009] Preferably, the pressure equalization pipeline is equipped with valve No. 5 at the end near the liquid-driven tank A, and valve No. 6 at the end near the liquid-driven tank B.

[0010] Preferably, the top inlets of both liquid-driven tank A and liquid-driven tank B are connected to the medium input pipeline, and the top outlets of both liquid-driven tank A and liquid-driven tank B are connected to the medium output pipeline.

[0011] Preferably, the top inlet of the liquid-driven tank A is connected to the medium input pipeline via a No. 1 check valve, and the top outlet of the liquid-driven tank A is connected to the medium output pipeline via a No. 2 check valve.

[0012] Preferably, the top inlet of the liquid-driven tank B is connected to the medium input pipeline via a No. 3 check valve, and the top outlet of the liquid-driven tank B is connected to the medium output pipeline via a No. 4 check valve.

[0013] Preferably, the power pump, valve No. 1, valve No. 2, valve No. 3, valve No. 4, intelligent pressure equalization valve, valve No. 5, valve No. 6, check valve No. 1, check valve No. 2, check valve No. 3, and check valve No. 4 are all controlled by a reversing control system.

[0014] Preferably, it also includes an assist system, which is pneumatically or hydraulically driven, to provide driving assistance to the directional valve.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] In this invention, a pilot pressure equalization valve is opened before the reversing valve is activated by a preset command. This instantly introduces high-pressure gas from the compression clearance at the top of the high-pressure tank into the low-pressure tank, achieving pressure equalization between the two tanks before automatically closing. Then, the reversing operation is initiated. At this time, the pressure difference across the reversing valve gate is significantly reduced, and the reversing torque is decreased. This not only ensures smooth operation and reduces the failure rate but also significantly improves the device's operating pressure differential. Through technological advancements, the reversing torque is reduced, the device's operating pressure differential is increased, the auxiliary system is simplified, manufacturing costs are reduced, maintenance frequency is reduced, the device's operating rate is increased, and the user experience of the device in the market is significantly improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] In the diagram: 1. Power pump; 2. Valve No. 1; 3. Valve No. 2; 4. Valve No. 3; 5. Valve No. 4; 6. Intelligent pressure equalizing valve; 61. Valve No. 5; 62. Valve No. 6; 7. Pressure equalizing pipeline; 8. Check valve No. 1; 9. Check valve No. 2; 10. Check valve No. 3; 11. Check valve No. 4; 01. Medium input pipeline; 02. Medium output pipeline; 03. Power hydraulic pipeline No. 1; 04. Power hydraulic pipeline No. 2; 05. Reversing control system; 06. Power assist system. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below.

[0020] The "range" disclosed in this utility model is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10–50 is listed for a specific parameter, it is also expected that ranges of 10–40 and 20–50 are also included. Furthermore, if the minimum range values ​​are listed as 1 and 2, and the maximum range values ​​are listed as 3, 4, and 5, then the following ranges are all expected: 1–3, 1–4, 1–5, 2–3, 2–4, and 2–5. In this application, unless otherwise stated, the numerical range "a–b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0–5" means that all real numbers between "0–5" have been listed herein; "0–5" is merely a shortened representation of these numerical combinations.

[0021] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0022] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0023] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0024] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0025] Unless otherwise specified, the reaction will proceed under normal temperature and pressure conditions.

[0026] Unless otherwise specified, all parts or percentages are by weight or by weight percentage.

[0027] In this invention, all the substances used are known substances that can be purchased or synthesized by known methods.

[0028] In this invention, all the devices or equipment used are conventional devices or equipment known in the art and are readily available.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0030] Example:

[0031] A pilot pressure equalization drag reduction commutation device, such as Figure 1 As shown, it includes a liquid-driven tank A and a liquid-driven tank B. The upper inlets of liquid-driven tank A and liquid-driven tank B are connected by a No. 1 power liquid pipeline 03, and the lower inlets of liquid-driven tank A and liquid-driven tank B are connected by a No. 2 power liquid pipeline 04. The No. 1 power liquid pipeline 03 and the No. 2 power liquid pipeline 04 are connected by a power pump 1.

[0032] The top inlets of liquid-driven tank A and liquid-driven tank B are connected by a pressure equalization pipeline 7, which is equipped with an intelligent pressure equalization valve 6.

[0033] In one possible implementation, valve 2 is provided at the end of power fluid line 03 near the liquid drive tank A, valve 3 is provided at the end of power fluid line 04 near the liquid drive tank A, valve 4 is provided at the end of power fluid line 03 near the liquid drive tank B, and valve 5 is provided at the end of power fluid line 04 near the liquid drive tank B.

[0034] In one possible implementation, the pressure equalization line 7 is equipped with valve 61 at the end near the liquid-driven tank A, and valve 62 at the end near the liquid-driven tank B.

[0035] In one possible implementation, the top inlets of both liquid-driven tank A and liquid-driven tank B are connected to the medium input line 01, and the top outlets of both liquid-driven tank A and liquid-driven tank B are connected to the medium output line 02.

[0036] In one possible implementation, the top inlet of the liquid-driven tank A is connected to the medium input pipeline 01 via a first check valve 8, and the top outlet of the liquid-driven tank A is connected to the medium output pipeline 02 via a second check valve 9.

[0037] In one possible implementation, the top inlet of the liquid-driven tank B is connected to the medium input pipeline 01 via a check valve 10, and the top outlet of the liquid-driven tank B is connected to the medium output pipeline 02 via a check valve 11.

[0038] In one possible implementation, the power pump 1, valve 2, valve 3, valve 4, valve 5, intelligent pressure equalization valve 6, valve 61, valve 62, check valve 8, check valve 9, check valve 10, and check valve 11 are all controlled by the reversing control system 05.

[0039] In one possible implementation, an assist system 06, which is pneumatically or hydraulically driven, is also included to provide drive assistance to the directional valve.

[0040] In one possible implementation, the existing centrifugal valve group switching and reversing device achieves device reversal through valve switching. Specifically, after the power pump starts, valves 3 and 5 are opened, while valves 2 and 4 are closed. The power fluid in tank A is pressurized by pump 1 and pumped into liquid drive tank B. The continuously flowing drive fluid compresses and performs work as the liquid level in liquid drive tank B rises. When the liquid level in liquid drive tank A reaches a set position, the valves are switched again, opening valves 2 and 4 and closing valves 3 and 5. The power fluid in tank B is pressurized by pump 1 and pumped into liquid drive tank A, where the continuously flowing drive fluid compresses and performs work as the liquid level rises. When the liquid level in liquid drive tank B reaches a set position, the valves are switched again. This cycle repeats to achieve pressurized delivery. The main problems are: when the pressure difference between liquid drive tank A and liquid drive tank B increases, the reversing valve generates a huge load under the action of the pressure difference, which increases the reversing torque, requires the addition of an auxiliary mechanism, and increases the manufacturing cost; it increases the frequency of failures and reduces the operating rate; it restricts the improvement of the unit's working pressure difference capability; and it reduces the reliability of the unit's operation.

[0041] The pressure equalization pipeline 7 is connected to the highest point before the one-way valve at the top outlet of liquid-driven tank A and liquid-driven tank B. Before switching, the pilot pressure equalization valve 6 is opened before the switching valve is started by a preset command, so that the high-pressure gas in the compression clearance at the top of the high-pressure tank is instantly introduced into the low-pressure tank. After achieving pressure equalization between the two tanks, it is automatically closed, and then the switching operation is started. At this time, the pressure difference before and after the gate of the switching valve is greatly reduced, and the switching torque is reduced. This not only achieves smooth operation and reduces the failure rate, but also greatly increases the working pressure difference of the unit.

[0042] By adopting the above technical solution:

[0043] The centrifugal dual-chamber mixing device, which uses mechanical switching of the reversing mode through process valve groups, reduces reversing torque, increases the device's operating pressure differential, simplifies the auxiliary system, reduces manufacturing costs, reduces maintenance frequency, increases device uptime, and significantly improves the user experience of the device in the market.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pilot pressure equalization drag reduction commutation device, characterized in that: It includes a liquid-driven tank A and a liquid-driven tank B. The upper inlets of liquid-driven tank A and liquid-driven tank B are connected by a No. 1 power liquid pipeline (03). The lower inlets of liquid-driven tank A and liquid-driven tank B are connected by a No. 2 power liquid pipeline (04). The No. 1 power liquid pipeline (03) and the No. 2 power liquid pipeline (04) are connected by a power pump (1). The top inlets of the liquid-driven tank A and the liquid-driven tank B are connected by a pressure equalization pipeline (7), and the pressure equalization pipeline (7) is equipped with an intelligent pressure equalization valve (6).

2. The pilot pressure equalization drag reduction commutation device as described in claim 1, characterized in that: The first power fluid pipeline (03) is equipped with a first valve (2) at the end near the liquid drive tank A, the second power fluid pipeline (04) is equipped with a second valve (3) at the end near the liquid drive tank A, the first power fluid pipeline (03) is equipped with a third valve (4) at the end near the liquid drive tank B, and the second power fluid pipeline (04) is equipped with a fourth valve (5) at the end near the liquid drive tank B.

3. The pilot pressure equalization drag reduction commutation device as described in claim 1, characterized in that: The pressure equalization pipeline (7) is equipped with valve No. 5 (61) at the end near the liquid-driven tank A, and valve No. 6 (62) is equipped at the end near the liquid-driven tank B.

4. The pilot pressure equalization drag reduction commutation device as described in claim 1, characterized in that: The top inlets of both liquid-driven tank A and liquid-driven tank B are connected to the medium input pipeline (01), and the top outlets of both liquid-driven tank A and liquid-driven tank B are connected to the medium output pipeline (02).

5. The pilot pressure equalization drag reduction commutation device as described in claim 4, characterized in that: The top inlet of the liquid-driven tank A is connected to the medium input pipeline (01) via a first check valve (8), and the top outlet of the liquid-driven tank A is connected to the medium output pipeline (02) via a second check valve (9).

6. The pilot pressure equalization drag reduction commutation device as described in claim 4, characterized in that: The top inlet of the liquid-driven tank B is connected to the medium input pipeline (01) via a check valve No. 3 (10), and the top outlet of the liquid-driven tank B is connected to the medium output pipeline (02) via a check valve No. 4 (11).

7. The pilot pressure equalization drag reduction commutation device as described in claim 4, characterized in that: The power pump (1), valve 1 (2), valve 2 (3), valve 3 (4), valve 4 (5), intelligent pressure equalization valve (6), valve 5 (61), valve 6 (62), check valve 1 (8), check valve 2 (9), check valve 3 (10), and check valve 4 (11) are all controlled by the reversing control system (05).

8. The pilot pressure equalization drag reduction commutation device as described in claim 4, characterized in that: It also includes an assist system (06), which is pneumatically or hydraulically driven to provide drive assistance for the directional valve.

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