Petroleum clean high-low pressure water injection automatic pressure regulating system

Abstract

The utility model provides a petroleum clean high-low pressure water injection automatic pressure regulating system which comprises a skid-mounted device, a control unit arranged on the skid-mounted device, and a high-pressure water inlet valve, a water inlet monitoring unit, a frequency conversion pressurizing unit, a water outlet monitoring unit and a high-pressure water outlet valve which are sequentially connected in series through a high-pressure pipeline, the water inlet monitoring unit, the water outlet monitoring unit and the frequency conversion pressurizing unit are electrically connected with the control unit, the water inlet end of the high-pressure water inlet valve is connected with a water outlet pipe of a system pipeline through a high-pressure pipeline, and the water outlet end of the high-pressure water outlet valve is connected with a water inlet pipe of a single-well water inlet pipeline through a high-pressure pipeline. The variable-frequency pressurizing unit comprises a pressurizing water inlet high-pressure valve, a pressurizing water outlet high-pressure valve and a high-pressure variable-frequency pressurizing pump, the pressurizing water inlet high-pressure valve is connected with the water inlet monitoring unit and the water inlet end of the high-pressure variable-frequency pressurizing pump through a high-pressure pipeline, and the pressurizing water outlet high-pressure valve is connected with the water outlet end of the high-pressure variable-frequency pressurizing pump and the water outlet monitoring unit through a high-pressure pipeline; and the high-voltage variable-frequency booster pump is electrically connected with the control unit.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of oil exploitation relates to a kind of petroleum water injection automation system, especially a kind of petroleum net high-low pressure water injection automatic pressure regulating system. BACKGROUND

[0002] The injection pressure of the existing overall oil production system is mainly based on the pressure of joint station and intermediate transmission pump house, when the injection pressure of local single well needs to be regulated, oil production technicians need to manually adjust the corresponding valve of joint station or intermediate transmission pump house to regulate the pressure of single well. This regulation mode not only increases the workload of existing technicians and the input of labor cost in operation and maintenance process, but also has the problems of poor flexibility, pressure regulating delay, and influence on oil production efficiency and oil production after pressure regulating. Therefore, it is necessary to provide a water injection system that can timely and automatically adjust the pressure of single well. SUMMARY

[0003] The utility model aims at providing a kind of petroleum net high-low pressure water injection automatic pressure regulating system to solve the technical problems of large workload of oil production technicians, poor flexibility, pressure regulating delay, influence on normal oil production efficiency and oil production in the prior art.

[0004] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows:

[0005] A kind of petroleum net high-low pressure water injection automatic pressure regulating system, which comprises a pry, a control unit arranged on the pry, and a high-pressure inlet valve, a water inlet monitoring unit, a frequency conversion booster unit, a water outlet monitoring unit and a high-pressure outlet valve connected in series through a high-pressure pipeline, the water inlet monitoring unit, the water outlet monitoring unit and the frequency conversion booster unit are electrically connected with the control unit, the water inlet end of the high-pressure inlet valve is connected with the water outlet pipe of system pipeline through a high-pressure pipeline, and the water outlet end of the high-pressure outlet valve is connected with the water inlet pipe of single well water inlet pipeline through a high-pressure pipeline.

[0006] The frequency conversion booster unit comprises a booster inlet high-pressure valve, a booster outlet high-pressure valve and a high-pressure frequency conversion booster pump, the booster inlet high-pressure valve is connected with the water inlet end of the water inlet monitoring unit and the high-pressure frequency conversion booster pump through a high-pressure pipeline, the booster outlet high-pressure valve is connected with the water outlet end of the high-pressure frequency conversion booster pump and the water outlet monitoring unit through a high-pressure pipeline, and the high-pressure frequency conversion booster pump is electrically connected with the control unit.

[0007] The water inlet monitoring unit comprises a pressure gauge A, and the pressure gauge A is electrically connected with the control unit.

[0008] The water outlet monitoring unit comprises a pressure gauge B, a pressure transmitter and a remote flowmeter connected in series through a high-pressure pipeline and electrically connected with the control unit.

[0009] The high-pressure filter is connected in series between the high-pressure inlet water pressure valve and the pressure gauge A.

[0010] The bypass unit is connected in parallel with the variable frequency supercharging unit through a tee joint, and the bypass unit comprises a bypass pipe and a communication high-pressure valve connected in parallel with the variable frequency supercharging unit through the bypass pipe.

[0011] The emptying unit comprises an emptying tee joint and an emptying high-pressure valve, the emptying tee joint is arranged at the water outlet end of the high-pressure variable frequency supercharging pump, the emptying high-pressure valve is arranged at the positive end of the emptying tee joint, and the high-pressure water outlet valve is arranged at the straight end of the emptying tee joint.

[0012] The control unit comprises a PLC controller and a remote communication module, the water inlet monitoring unit, the water outlet monitoring unit and the variable frequency supercharging unit are electrically connected with the PLC controller, and the remote communication module is in communication connection with the PLC controller.

[0013] The high-pressure variable frequency supercharging pump is a reciprocating high-pressure variable frequency supercharging pump.

[0014] The remote flow meter is a turbine flow meter.

[0015] The petroleum high-low pressure water injection automatic pressure regulating system is connected in series at the water inlet end of a single well pipeline requiring local pressure regulation, the control unit with the PLC controller is arranged, the water inlet monitoring unit, the variable frequency supercharging unit and the water outlet monitoring unit are arranged on the high-pressure pipeline, the program and the parameters are input into the PLC controller, the water inlet monitoring unit and the water outlet monitoring unit are used for monitoring the water inlet end pressure, the water outlet end pressure and the water outlet end medium, the signals are sent to the PLC controller in time, the PLC controller controls the variable frequency supercharging unit to flexibly adjust the pressure regulating coefficient after program calculation, so that the water outlet end can continuously supply water and provide required water supply pressure, and the single well water supply pressure in the whole oil production system can be flexibly and accurately automatically adjusted in time, the workload of the oil production staff is reduced, and the problem that the oil production efficiency and the oil production capacity are affected due to untimely water pressure regulation is avoided.

[0016] The technical scheme can effectively overcome the defects and deficiencies in the prior art, and is suitable for popularization and application in the water injection system of oil exploitation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a simplified structure diagram of the utility model.

[0018] Marked in the figure: 1, pry, 2, control unit, 3, high pressure pipeline, 4, high pressure water valve, 5, high pressure filter, 6, pressure gauge A, 7, booster water high pressure valve, 8, high pressure variable frequency booster pump, 9, booster water high pressure valve, 10, pressure gauge B, 11, pressure transmitter, 12, remote flowmeter, 13, high pressure water valve, 14, bypass pipe, 15, connecting high pressure valve, 16, empty high pressure valve. DETAILED DESCRIPTION

[0019] In order to better understand the purpose, structure and function of the utility model, the utility model will be described in further detail below in combination with the drawings.

[0020] As Figure 1 shown, the utility model provides a kind of petroleum high-low pressure water injection automatic pressure regulating system, for accessing single well water inlet pipeline adjustment single well water injection pressure, it includes pry 1, control unit 2 being arranged on pry 1, and high pressure water valve 4, water inlet monitoring unit, frequency conversion booster unit, water outlet monitoring unit and high pressure water valve 13 being connected in turn by high pressure pipeline 3.It is included PLC controller in the embodiment of control unit 2, water inlet monitoring unit, water outlet monitoring unit and frequency conversion booster unit are electrically connected with the PLC controller of the control unit 2, the monitoring signal of water inlet end and water outlet end is sent to the PLC controller of control unit 2, and the PLC controller controls frequency conversion booster unit to adjust booster coefficient after the analysis and calculation of received monitoring signal by internal program, to adjust single well water pressure in time, i.e.

[0021] And in order to access system into single well water inlet pipeline, in the embodiment, the original system pipeline needs to be disconnected, the front end of disconnected pipeline is connected with pry 1 import pipeline, i.e.

[0022] In order to realize single well flexible pressure regulating, the frequency conversion booster unit in the embodiment includes booster water high pressure valve 7, booster water high pressure valve 9 and high pressure variable frequency booster pump 8, wherein, in order to facilitate maintenance to high pressure variable frequency booster pump 8, booster water high pressure valve 7 in the embodiment is connected with the water inlet end of high pressure variable frequency booster pump 8 by high pressure pipeline 3, booster water high pressure valve 9 is connected with the water outlet end of high pressure variable frequency booster pump 8 and water outlet monitoring unit by high pressure pipeline 3, and high pressure variable frequency booster pump 8 is electrically connected with the output end of PLC controller of control unit 2, preferably, high pressure variable frequency booster pump 8 is reciprocating high pressure variable frequency booster pump in the embodiment.

[0023] Further, the water inlet monitoring unit comprises a pressure gauge A6 electrically connected with the control unit 2, for monitoring the pressure of the water inlet end of the system, and inputting the low pressure threshold value, high pressure threshold value and instantaneous flow threshold value of the water inlet end and water outlet end of the high-pressure variable frequency booster pump 8 into the PLC controller, when the pressure of the water inlet end is lower than the low pressure threshold value of the water inlet end of the high-pressure variable frequency booster pump 8, or higher than the high pressure threshold value of the water inlet end of the high-pressure variable frequency booster pump 8, the PLC controller controls the high-pressure variable frequency booster pump 8 to stop, and the staff carries out maintenance on the pry water inlet end and the equipment before the pry end.

[0024] Further, the water outlet monitoring unit comprises a pressure gauge B10, a pressure transmitter 11 and a remote flowmeter 12 connected in sequence through the high-pressure pipeline 3, and the three are electrically connected with the control unit 2, wherein the pressure gauge B10 and the pressure transmitter 11 are respectively used for monitoring the pressure of the water outlet end of the system, and sending signals to the signal receiving end of the PLC controller; the remote flowmeter 12 is a turbine flowmeter, used for monitoring the instantaneous flow of the water outlet end, and sending signals to the PLC controller, when the water outlet pressure of the water outlet end is higher than the set water outlet end high pressure threshold value, or the instantaneous flow exceeds the set water outlet end instantaneous flow, the PLC controller controls the high-pressure variable frequency booster pump 8 to stop, and the staff carries out maintenance on the pry pipeline and the variable frequency high-pressure booster pump 8, when the water inlet end pressure is normal and the water outlet end pressure is lower than the low pressure threshold value of the water outlet end or the instantaneous flow is lower than the instantaneous flow threshold value, the PLC controller controls the high-pressure variable frequency booster pump 8 to frequency boost.

[0025] In addition, in order to avoid impurities entering the high-pressure variable frequency booster pump 8, in the embodiment, a high-pressure filter 5 is connected in series on the high-pressure pipeline 3 between the booster water inlet high-pressure valve 7 and the pressure gauge A6.

[0026] In order to facilitate maintenance of the system, or cleaning of the high-pressure filter 5, in the embodiment, an emptying unit is further provided on the high-pressure variable frequency booster pump 8, the emptying unit comprises an emptying tee and an emptying high-pressure valve 16, the emptying tee is arranged at the water outlet end of the high-pressure variable frequency booster pump 8, the emptying high-pressure valve 16 is arranged at the positive end of the emptying tee, and the booster water outlet high-pressure valve 9 is arranged at the straight end of the emptying tee.

[0027] In order to facilitate maintenance and repair of the high-pressure variable frequency booster pump 8, in the embodiment, a bypass unit is further provided on the system pipeline, the bypass unit is connected in parallel with the variable frequency boosting unit through a tee, and comprises a bypass pipe 14 and a communication high-pressure valve 15, the communication high-pressure valve 15 is connected in parallel with the variable frequency boosting unit through the bypass pipe 14.

[0028] During normal operation of the device, the connecting high-pressure valve and the emptying high-pressure valve 16 are in a closed state; when it is necessary to clean or maintain the system, or to clean the high-pressure filter 5, it is necessary to first close the high-pressure water inlet valve 4 and the high-pressure water outlet valve 13, and then open the emptying high-pressure valve 16 to release pressure; after the pressure is released, the system is maintained or the high-pressure filter 5 is cleaned; when it is necessary to maintain and repair the high-pressure variable frequency booster pump 8, first close the booster water inlet high-pressure valve 7 and the booster water outlet high-pressure valve 9, and then open the connecting high-pressure valve 15, and then slowly open the emptying high-pressure valve 16; after the emptying high-pressure valve 16 is released, the high-pressure variable frequency booster pump 8 is maintained and repaired.

[0029] On this basis, the control unit 2 in the embodiment is further provided with a remote communication module for communication connection with a computer, a mobile phone and other remote data receiving ends, and the computer, the mobile phone and other remote data receiving ends are communicated and connected with the PLC controller by using the remote communication module, so that workers can know various data information of the system in real time through the computer or the mobile phone, and the control parameters of the PLC controller can be changed and adjusted through the mobile phone and the computer, which is convenient and fast, not only further reduces the workload of the oil extraction workers, but also further improves the immediacy and flexibility of the single well water pressure control, thereby further ensuring the single well oil extraction efficiency.

[0030] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model.In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model.Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. An automatic pressure regulating system for oil net high and low pressure water injection, characterized by: It comprises a skid (1), a control unit (2) arranged on the skid (1), and a high-pressure water inlet valve (4), a water inlet monitoring unit, a frequency conversion and boosting unit, a water outlet monitoring unit and a high-pressure water outlet valve (13) which are sequentially connected in series via a high-pressure pipeline (3); the water inlet monitoring unit, the water outlet monitoring unit and the frequency conversion and boosting unit are respectively electrically connected to the control unit (2); the water inlet end of the high-pressure water inlet valve (4) is connected to the water outlet pipe of the system pipeline via the high-pressure pipeline (3); and the water outlet end of the high-pressure water outlet valve (13) is connected to the water inlet pipe of the single well water inlet pipeline via the high-pressure pipeline (3); The variable frequency boosting unit comprises a boosting water inlet high-pressure valve (7), a boosting water outlet high-pressure valve (9) and a high-pressure variable frequency boosting pump (8); the boosting water inlet high-pressure valve (7) is connected to the water inlet monitoring unit and the water inlet end of the high-pressure variable frequency boosting pump (8) via a high-pressure pipeline (3); the boosting water outlet high-pressure valve (9) is connected to the water outlet end of the high-pressure variable frequency boosting pump (8) and the water outlet monitoring unit via a high-pressure pipeline (3); and the high-pressure variable frequency boosting pump (8) is electrically connected to the control unit (2).

2. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 1 is characterized in that: The water inlet monitoring unit comprises a pressure gauge A (6), and the pressure gauge A (6) is electrically connected to the control unit (2).

3. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 1 is characterized in that: The water outlet monitoring unit comprises a pressure gauge B (10), a pressure transmitter (11) and a remote flow meter (12), which are connected in sequence through a high-pressure pipeline (3) and electrically connected to the control unit (2).

4. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 2 is characterized in that: A high-pressure filter (5) is also connected in series between the boost water inlet high-pressure valve (7) and the pressure gauge A (6) via a high-pressure pipeline (3).

5. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 1 is characterized in that: It also includes a bypass unit, which is connected in parallel with the variable frequency boost unit via a three-way connection. The bypass unit includes a bypass pipe (14) and a connecting high-pressure valve (15). The connecting high-pressure valve (15) is connected in parallel with the variable frequency boost unit via the bypass pipe (14).

6. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 1, characterized in that: It also includes an emptying unit, which includes an emptying tee and an emptying high-pressure valve (16). The emptying tee is arranged at the water outlet end of the high-pressure variable frequency booster pump (8), the emptying high-pressure valve (16) is arranged at the positive end of the emptying tee, and the boosting water outlet high-pressure valve (9) is arranged at the straight end of the emptying tee.

7. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 1, characterized in that: The control unit (2) comprises a PLC controller and a remote communication module; the water inlet monitoring unit, the water outlet monitoring unit and the variable frequency boost unit are electrically connected to the PLC controller respectively; and the remote communication module is in communication connection with the PLC controller.

8. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 1 is characterized in that: The high-pressure variable-frequency booster pump (8) is a reciprocating high-pressure variable-frequency booster pump.

9. The automatic pressure regulating system for oil net high and low pressure water injection according to claim 3, characterized in that: The remote flow meter (12) is a turbine flow meter.

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