A plunger gas lift gas well intelligent well opening control device

Abstract

The invention relates to an intelligent well opening control device for a plunger gas lift gas well, which belongs to the field of plunger water drainage and gas production technology. The main purpose is to solve the problem that the number of production wells in the current gas field increases year by year, the workload of manual parameter adjustment management is large, and the actual gas well control management requirements cannot be met; the technical scheme is: the experimental device is mainly composed of a downhole plunger and a wellhead control device, the downhole plunger includes a plunger housing, a connecting line, a pressure sensor, a pressure signal processor and a wireless signal transmitter, and the wellhead control device includes a signal receiver, an automatic control switch, a solar panel and a wellhead valve; the invention is convenient and quick to use, the simulation device is visualized, the test effect is significant, the cost is low, and it is easy to promote.

Description

Technical Field

[0001] The invention relates to an intelligent well opening control device for a plunger gas lift gas well, belonging to the field of plunger water drainage and gas production technology. Background Art

[0002] For gas reservoirs in the middle and late stages of development, the reduction in formation pressure will cause the gas well production to be lower than the critical liquid-carrying flow rate. The gas well itself lacks energy and cannot discharge the formation water out of the wellbore in time, resulting in liquid accumulation in the wellbore. In severe cases, the gas well will be completely crushed. As an important means of drainage and gas production in the middle and late stages of gas wells, the plunger gas lift process has the characteristics of convenient operation, low cost, good adaptability, and high degree of automation. Its principle is to use the energy generated by the expansion of oil and annular air when the gas well is opened to move the plunger, and push the bottom of the well to discharge upward, so as to achieve the purpose of increasing the production of the gas well. In the actual operation of the plunger gas lift drainage and gas production technology, it mainly relies on manual parameter adjustment and management by technicians. With the development of gas fields, the number of wells increases year by year, and the workload of parameter adjustment and management also increases year by year. Existing managers cannot meet the requirements of gas well control and management. Therefore, the research on intelligent plungers is of great significance to the development and application of plunger gas lift technology. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the number of production wells in gas fields is increasing year by year, the workload of manual parameter adjustment management is large, and it cannot meet the actual gas well control management requirements; it provides a convenient and efficient plunger gas lift gas well intelligent well opening control device. The technical solution adopted by the present invention is:

[0004] A plunger gas lift gas well intelligent well opening control device mainly consists of a downhole plunger and a wellhead control device, wherein the downhole plunger consists of a plunger housing (1), a connecting line (2), a pressure sensor (3), a pressure signal processor (4) and a wireless signal transmitter (5), and the wellhead control device consists of a signal receiver (6), an automatic control switch (7), a solar panel (8) and a wellhead valve (9); the device is characterized in that the pressure sensor (3) and the pressure signal processor (4) are connected by a connecting line (2) to transmit a pressure change signal, the pressure signal processor (4) and the wireless signal transmitter (5) are connected by a connecting line to transmit a pressure signal determined by the pressure signal processor (4), the wireless signal receiver (5) receives the wireless signal transmitted by the wireless signal transmitter (5), opens the automatic control switch (7), transmits an electrical signal to the wellhead valve (9), opens the wellhead valve, opens the gas well, and the plunger moves upward, and the solar panel (8) provides the automatic control switch (7) with the required electricity.

[0005] The above-mentioned plunger gas lift gas well intelligent well opening control device is characterized in that the connecting wire (2) is a BVR copper core polyvinyl chloride insulated soft wire with a cross-sectional area of ​​0.5mm 2The maximum operating temperature can reach 70°C. The pressure sensor (3) is an OMEGA high-precision pressure sensor with a response time of less than 1 millisecond. The change in the height of the liquid column above the plunger will cause the strength of the pressure change signal emitted by the pressure sensor (3). The built-in judgment program of the pressure signal processor (4) can judge the strength of the pressure change signal emitted by the pressure sensor (3) after the plunger is lowered into the gas well. When the maximum liquid column height acceptable to the plunger for opening the well is reached, the pressure signal processor (4) can transmit the determined pressure signal to the wireless signal transmitter (5). The solar panel (8) has a specification of 265mm×265mm×25mm, and the material is single crystal silicon. The model is APM18M5w27×27. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a cross-sectional view of the downhole plunger structure of the present invention.

[0007] Figure 2 It is a structural schematic diagram of the wellhead control device of the present invention.

[0008] Figure 3 It is a flow chart of device control of the present invention.

[0009] In the figure: 1. plunger housing, 2. connecting wire, 3. pressure sensor, 4. pressure signal processor, 5. wireless signal transmitter, 6. signal receiver, 7. automatic control switch, 8. solar panel, 9. wellhead valve. DETAILED DESCRIPTION

[0010] The present invention will be further described below in conjunction with the accompanying drawings.

[0011] A plunger gas lift gas well intelligent well opening control device mainly consists of a downhole plunger and a wellhead control device, wherein the downhole plunger consists of a plunger housing (1), a connecting line (2), a pressure sensor (3), a pressure signal processor (4) and a wireless signal transmitter (5), and the wellhead control device consists of a signal receiver (6), an automatic control switch (7), a solar panel (8) and a wellhead valve (9); the device is characterized in that the pressure sensor (3) and the pressure signal processor (4) are connected by a connecting line (2) to transmit a pressure change signal, the pressure signal processor (4) and the wireless signal transmitter (5) are connected by a connecting line to transmit a pressure signal determined by the pressure signal processor (4), the wireless signal receiver (6) receives the wireless signal transmitted by the wireless signal transmitter (5), opens the automatic control switch (7), transmits an electrical signal to the wellhead valve (9), opens the wellhead valve, opens the gas well, and moves the plunger upward, and the solar panel (8) provides the automatic control switch (7) with the required electricity.

[0012] like Figure 1As shown, the connecting wire (2) is a BVR copper core polyvinyl chloride insulated soft wire with a cross-sectional area of ​​0.5mm 2 The maximum operating temperature can reach 70°C. The pressure sensor (3) is an OMEGA high-precision pressure sensor with a response time of less than 1 millisecond. The change in the height of the liquid column above the plunger will cause the strength of the pressure change signal emitted by the pressure sensor (3). The built-in judgment program of the pressure signal processor (4) can judge the strength of the pressure change signal emitted by the pressure sensor (3) after the plunger is lowered into the gas well. When the maximum liquid column height acceptable to the plunger for opening the well is reached, the pressure signal processor (4) can transmit the determined pressure signal to the wireless signal transmitter (5). The solar panel (8) has a specification of 265mm×265mm×25mm, and the material is single crystal silicon. The model is APM18M5w27×27.

[0013] The present invention provides a plunger gas lift gas well intelligent well opening control device, such as Figure 1 The device is a cross-sectional view of the structure of the downhole plunger device. The strength of the signal transmitted by the pressure sensor is determined by the height of the liquid column above the plunger. In a liquid-accumulated gas well, the deeper the plunger is lowered, the greater the height of the liquid column above the plunger will be, and the stronger the pressure signal transmitted by the pressure sensor will be. The liquid-accumulated gas well does not have sufficient energy in the later stage. When the plunger is lowered too deep and then the well is opened, the plunger will not be able to reach the wellhead and effectively discharge the accumulated liquid at the bottom of the well. The pressure signal processor can determine the maximum acceptable liquid column height that the well-opening plunger can reach the wellhead, that is, when the pressure reaches the maximum acceptable pressure that the well-opening plunger can reach the wellhead, it will send a signal to the wireless signal transmitter, and the wireless signal transmitter will then send a signal to the import control device.

[0014] The present invention provides a plunger gas lift gas well intelligent well opening control device, such as Figure 2 The device is a schematic diagram of a wellhead control device. When the signal receiver receives a wireless signal from the plunger downhole, the automatic control switch will open and transmit an electrical signal to the wellhead valve to open the wellhead valve and open the well. The solar control circuit can provide power for the opening of the automatic control switch and the transmission of the electrical signal.

[0015] The present invention provides a plunger gas lift gas well intelligent well opening control device, the control process is as follows: Figure 3As shown. The change in the height of the liquid column above the plunger will cause the strength of the pressure change signal sent by the pressure sensor. The built-in judgment program of the pressure signal processor can judge the strength of the pressure change signal sent by the pressure sensor after the plunger is lowered into the gas well. When the maximum liquid column height acceptable to the plunger is reached, the pressure signal processor can send the determined pressure signal to the wireless signal transmitter, and the wireless signal transmitter will then send a signal to the import control device. When the signal receiver receives the wireless signal sent by the downhole plunger, the automatic control switch will open and transmit an electrical signal to the wellhead valve to open the wellhead valve and open the well.

[0016] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the practical invention should be included in the scope of the claims of the present invention.

Claims

1. A plunger gas lift gas well intelligent well opening control method, which is controlled by a plunger gas lift gas well intelligent well opening control device, the plunger gas lift gas well intelligent well opening control device mainly consists of a downhole plunger and a wellhead control device, the downhole plunger consists of a plunger housing (1), a connecting line (2), a pressure sensor (3), a pressure signal processor (4) and a wireless signal transmitter (5), and the wellhead control device consists of a wireless signal receiver (6), an automatic control switch (7), a solar panel (8) and a wellhead valve (9); characterized in that: The pressure sensor (3) and the pressure signal processor (4) are connected by a connecting line (2) for transmitting a pressure change signal. The pressure signal processor (4) and the wireless signal transmitter (5) are connected by a connecting line for transmitting a pressure signal determined by the pressure signal processor (4). The wireless signal receiver (6) receives the wireless signal transmitted by the wireless signal transmitter (5) to open the automatic control switch (7) and transmits an electrical signal to the wellhead valve (9) to open the wellhead valve, open the gas well, and move the plunger upward. The solar panel (8) provides the required electricity for the automatic control switch (7). The connecting wire (2) is a BVR copper core polyvinyl chloride insulated soft wire with a cross-sectional area of ​​0.5mm 2 The maximum operating temperature reaches 70°C. The pressure sensor (3) is an OMEGA high-precision pressure sensor with a response time of less than 1ms. The strength of the pressure change signal emitted by the pressure sensor (3) can reflect the change in the height of the liquid column above the plunger. The built-in judgment program of the pressure signal processor (4) can judge the strength of the pressure change signal emitted by the pressure sensor (3) after the plunger is lowered into the gas well. When the liquid column height reaches the maximum liquid column height acceptable to the plunger for opening the well, the pressure signal processor (4) can transmit the judged pressure signal to the wireless signal transmitter (5). The solar panel (8) has a specification of 265mm×265mm×25mm, and the material is single crystal silicon. The model is APM18M5w27×27.

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