A double-layer station entry integrated device and method for the upper and lower Guhe mining station of a gas field

Abstract

The present invention belongs to the technical field of gas field equipment, and specifically provides a double-layer integrated station entry device and method for the upper and lower Guhe mining stations in a gas field, including a high-pressure station entry device and a medium-pressure station entry device. The high-pressure station entry device is connected to the lower layer of the medium-pressure station entry device, which solves the problem in the prior art that a gas gathering station in a mountainous area cannot accommodate four station entry areas at the same time due to terrain limitations; the second purpose is to overcome the problem in the prior art that it is unable to meet the functions of emergency shutoff, pressure detection, manual venting of high-pressure incoming gas, manual shutoff of medium-pressure incoming gas, and automatic venting of overpressure. The present invention has a combination device with functions such as high-pressure station emergency shutoff, remote monitoring and alarm of station pressure, interlocking control of station pressure and emergency shutoff valve, manual venting, manual shutoff of medium-pressure incoming gas, remote monitoring and alarm of pressure, and automatic venting of overpressure, so as to reduce land occupation, shorten construction period, reduce staff and increase efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of gas field equipment, and in particular relates to a double-layer station entry integrated device and method for a gas field upper and lower Guhe mining station. Background Art

[0002] The Changqing gas field's Shanggu and Xiagu combined production test blocks receive gas from Shanggu medium-pressure gas wells, Shanggu high-pressure gas wells, Xiagu medium-pressure gas wells, and Xiagu high-pressure gas wells at the same time. The four types of gas need to enter the gas gathering station's entry area separately, and then undergo normal temperature separation or heating throttling separation processes. Due to terrain restrictions, the mountain gas gathering station cannot accommodate four entry areas at the same time.

[0003] In order to save station land, it is necessary to develop a new integrated device, which can be used to combine the medium / high pressure inlet areas at the gas gathering station, and meet the functions of emergency shutoff, pressure detection, manual venting of high-pressure gas, manual shutoff of medium-pressure gas, and automatic venting of overpressure. Summary of the invention

[0004] The present invention provides a double-layer integrated station entry device and method for the upper and lower Guhe mining stations in a gas field. The first purpose is to overcome the problem in the prior art that a gas gathering station in a mountainous area cannot accommodate four station entry areas at the same time due to terrain limitations; the second purpose is to overcome the problem that the prior art cannot meet the functions of emergency shutoff, pressure detection, manual venting of high-pressure gas, manual shutoff of medium-pressure gas, and automatic venting of overpressure.

[0005] To this end, the present invention provides a double-layer station entry integrated device for the upper and lower Guhe mining stations of the gas field, including a high-pressure station entry device and a medium-pressure station entry device, and the high-pressure station entry device is connected to the lower layer of the medium-pressure station entry device.

[0006] The high-pressure station entry device includes multiple high-pressure gas production units, which are arranged in parallel. Each high-pressure gas production unit includes a pressure gauge, a pneumatic emergency shut-off valve, a pressure transmitter and a manual shut-off valve. The pressure gauge, pneumatic emergency shut-off valve, pressure transmitter and manual shut-off valve are connected in sequence through pipelines.

[0007] Each high-pressure gas production unit also includes a vent pipeline and a vent ball valve, and the high-pressure station entry device also includes a throttle valve. The pipeline before the pressure gauge of each high-pressure gas production unit is connected to the vent ball valve through a vent pipeline, and multiple vent ball valves are connected to the throttle valve.

[0008] The pneumatic emergency shut-off valve is provided with a remote switch and an overpressure automatic shut-off switch.

[0009] The pressure transmitter is interlocked with the pneumatic emergency shut-off valve, and the pressure transmitter is provided with high and low pressure alarm devices.

[0010] The medium-pressure station entry device includes multiple medium-pressure gas production units, each of which includes a pressure detection gauge and a cut-off valve, and the pressure detection gauge and the cut-off valve are connected in sequence through pipelines.

[0011] Each medium-pressure gas production unit also includes an overpressure automatic venting pipeline and a venting gate valve, and the medium-pressure station entry device also includes a safety valve. The pipeline in front of the pressure detection gauge of each medium-pressure gas production unit is connected to the venting gate valve through an overpressure automatic venting pipeline, and the venting gate valves are connected to the safety valve.

[0012] The medium-pressure station entry device also includes a gas production pressure transmitter, which is connected to the pipeline between the vent valve and the pressure detection gauge of one medium-pressure gas production unit.

[0013] The upper and lower layers of the high-voltage station entry device and the medium-voltage station entry device are divided by a steel structure ladder platform.

[0014] A double-layer inlet integration method for the upper and lower Guhe production stations of a gas field, the specific steps of which are: the natural gas entering each high-pressure gas production unit in the high-pressure inlet device enters the pneumatic emergency shut-off valve after being detected by a pressure gauge, then enters the manual shut-off valve after being detected by a pressure transmitter, and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through a venting pipeline and a venting ball valve;

[0015] The natural gas entering each medium-pressure gas production unit in the medium-pressure inlet device enters the cut-off valve after being tested by the pressure detection gauge, and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through the overpressure automatic vent pipeline and vent gate valve.

[0016] Beneficial effects of the present invention: the double-layer station entry integrated device of the upper and lower Guhe mining station of the gas field provided by the present invention comprises a high-pressure station entry device and a medium-pressure station entry device, and the high-pressure station entry device is connected to the lower layer of the medium-pressure station entry device; a double-layer station entry integrated method of the upper and lower Guhe mining station of the gas field, the specific steps are: the natural gas entering each high-pressure gas production unit in the high-pressure station entry device enters the pneumatic emergency shut-off valve after being detected by the pressure gauge, then enters the manual shut-off valve after being detected by the pressure transmitter, and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through the venting pipeline and the venting ball valve; the natural gas pressure is detected by the pressure gauge, and the venting pipeline and the venting ball valve realize the venting of the high-pressure gas, the pneumatic emergency shut-off valve is provided with a remote switch and an overpressure automatic shut-off switch, so as to realize the functions of remote monitoring of the high-pressure gas and emergency cut-off when overpressure (exceeding the set pressure), the pressure transmitter is interlocked with the pneumatic emergency shut-off valve, and the pressure transmitter is provided with high and low pressure alarm functions to realize the high-pressure gas alarm function;

[0017] The natural gas entering each medium-pressure gas production unit in the medium-pressure station inlet device enters the cut-off valve after being detected by the pressure detection gauge, and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through the overpressure automatic venting pipeline and the venting gate valve; the pressure detection gauge realizes the medium-pressure gas incoming detection function, the overpressure automatic venting pipeline and the venting gate valve realize the overpressure automatic venting function of the medium-pressure gas incoming, and the cut-off valve realizes the medium-pressure gas incoming cut-off function;

[0018] The present invention relates to a novel integrated device for emergency shutoff, pressure detection, manual venting of high-pressure gas from upstream gas wells in a gas gathering station, manual shutoff of medium-pressure gas, pressure detection, and automatic venting over overpressure; the device is a combination device with functions such as emergency shutoff of high-pressure gas entering the station, remote monitoring and alarm of the station pressure, interlocking control of the station pressure and the emergency shutoff valve, manual venting, manual shutoff of medium-pressure gas, remote monitoring and alarm of pressure, and automatic venting over over pressure, so as to reduce land occupation, shorten construction period, reduce staff and increase efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the high-voltage station entry device;

[0021] Figure 2 It is a structural diagram of the medium voltage station entry device.

[0022] Explanation of the accompanying symbols: 1. Pressure gauge; 2. Pneumatic emergency shut-off valve; 3. Pressure transmitter; 4. Manual shut-off valve; 5. Vent ball valve; 6. Throttle valve; 7. Pressure test gauge; 8. Shut-off valve; 9. Vent gate valve; 10. Safety valve; 11. Gas production pressure transmitter. DETAILED DESCRIPTION

[0023] Embodiment 1:

[0024] A double-layer integrated station entry device for the upper and lower Guhe mining stations of a gas field includes a high-pressure station entry device and a medium-pressure station entry device, and the high-pressure station entry device is connected to the lower layer of the medium-pressure station entry device. The high-pressure pressure of the high-pressure station entry device is 10-25MPa, and the medium-pressure pressure of the medium-pressure station entry device is below 10MPa. The present invention is a combination device of a high-pressure station entry device and a medium-pressure station entry device, so as to reduce the land occupation, shorten the construction period, reduce the staff and increase the efficiency.

[0025] Embodiment 2:

[0026] like Figure 1As shown, on the basis of Example 1, the high-pressure station entry device includes multiple high-pressure gas collection units, which are arranged in parallel, and each high-pressure gas collection unit includes a pressure gauge 1, a pneumatic emergency shut-off valve 2, a pressure transmitter 3 and a manual shut-off valve 4, and the pressure gauge 1, the pneumatic emergency shut-off valve 2, the pressure transmitter 3 and the manual shut-off valve 4 are connected in sequence through pipelines. The natural gas pressure is detected by the pressure gauge 1, the pneumatic emergency shut-off valve 2 realizes the emergency automatic shut-off of the high-pressure gas, and the automation degree is high. The manual shut-off valve 4 realizes the manual shut-off of the high-pressure gas, and the adaptability is strong.

[0027] Embodiment 3:

[0028] On the basis of Example 2, each high-pressure gas production unit further includes a venting pipeline and a venting ball valve 5, and the high-pressure station entry device further includes a throttle valve 6. The pipeline before the pressure gauge 1 of each high-pressure gas production unit is connected to the venting ball valve 5 through a venting pipeline, and multiple venting ball valves 5 are connected to the throttle valve 6. The throttle valve 6 is an angle throttle valve, which has a simple structure, is easy to manufacture and maintain, has a small working stroke, a short opening and closing time, good sealing, small friction between sealing surfaces, and a long service life. The venting pipeline and the venting ball valve 5 realize the venting of high-pressure incoming gas, protect the pipeline and equipment, and improve the safety of the equipment and the operation process.

[0029] Embodiment 4:

[0030] On the basis of Example 3, the pneumatic emergency shut-off valve 2 is provided with a remote switch and an overpressure automatic shut-off switch, so as to realize the functions of remote monitoring of high-pressure incoming gas and emergency shut-off when the set pressure is exceeded, with high automation and strong operability.

[0031] The pressure transmitter 3 is interlocked with the pneumatic emergency shut-off valve 2, and the pressure transmitter 3 is provided with a high and low pressure alarm device. The high and low pressure alarm device realizes the high and low pressure gas alarm function, improves safety, and the high and low pressure alarm device is an existing alarm device.

[0032] Embodiment 5:

[0033] like Figure 2 As shown, on the basis of Example 4, the medium-pressure station entry device includes multiple medium-pressure gas collection units, each of which includes a pressure detection gauge 7 and a cut-off valve 8, which are connected in sequence through pipelines. The pressure detection gauge 7 realizes the medium-pressure gas incoming detection function; the cut-off valve 8 realizes the medium-pressure gas incoming cut-off function.

[0034] Embodiment 6:

[0035] On the basis of Example 5, each medium-pressure gas production unit further includes an overpressure automatic venting pipeline and a venting gate valve 9, and the medium-pressure station entry device further includes a safety valve 10. The pipeline in front of the pressure detection gauge 7 of each medium-pressure gas production unit is connected to the venting gate valve 9 through an overpressure automatic venting pipeline, and the venting gate valves 9 of each line are connected to the safety valve 10. The overpressure automatic venting pipeline and the venting gate valve 9 realize the automatic venting function when the medium-pressure incoming gas is overpressure (exceeding the set pressure).

[0036] Embodiment 7:

[0037] On the basis of Example 6, the medium-pressure station entry device further includes a gas production pressure transmitter 11, which is connected to the pipeline between the vent gate valve 9 of the medium-pressure gas production unit and the pressure detection gauge 7. The gas production pressure transmitter 11 converts the pressure signal into an electrical signal for uploading, detects the incoming gas pressure of the gas production main and uploads it, has a high degree of intelligence and improves the measurement accuracy.

[0038] Embodiment 8:

[0039] On the basis of Example 7, the upper and lower layers of the high-voltage station entry device and the medium-voltage station entry device are divided by a steel structure ladder platform. The steel structure platform has escalators and steps for operators in the station to go up and down, is easy to install and disassemble, has a simple and stable structure, maximizes the use of space, reduces floor space, and reduces production costs.

[0040] Embodiment 9:

[0041] On the basis of Example 8, a double-layer station integration method for the upper and lower Guhe mining stations of a gas field is provided, wherein the specific steps are as follows:

[0042] The natural gas entering each high-pressure gas production unit in the high-pressure station inlet device enters the pneumatic emergency shut-off valve 2 after being detected by the pressure gauge 1, and then enters the manual shut-off valve 4 after being detected by the pressure transmitter 3, and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through the venting pipeline and the venting ball valve 5; the design pressure of the venting pipeline is 25MPa;

[0043] The natural gas entering each medium-pressure gas production unit in the medium-pressure station entry device enters the cut-off valve 8 after being detected by the pressure detection gauge 7, and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through the overpressure automatic venting pipeline and the venting gate valve 9; the pipeline design pressure of the overpressure automatic venting pipeline is 10MPa; both the high-pressure station entry device and the medium-pressure station entry device can be equipped with corresponding non-sulfur-resistant or sulfur-resistant valves and pipes according to the hydrogen sulfide content of the incoming gas.

[0044] The present invention is a novel integrated device used in a gas gathering station for emergency shutoff, pressure detection, manual venting of high-pressure gas from upstream gas wells, as well as manual shutoff, pressure detection, and automatic venting of medium-pressure gas, thereby reducing land occupation, shortening construction period, and increasing efficiency with reduced staff.

[0045] In the description of the present invention, it should be understood that if a term indicates an orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0046] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A double-layer station entry integrated device for the upper and lower Guhe mining stations of a gas field, characterized by: It comprises a high-pressure station entry device and a medium-pressure station entry device, wherein the high-pressure station entry device is connected to the lower layer of the medium-pressure station entry device; the high-pressure station entry device comprises a plurality of high-pressure gas collection units, which are arranged in parallel, each of which comprises a pressure gauge (1), a pneumatic emergency shut-off valve (2), a pressure transmitter (3) and a manual shut-off valve (4), and the pressure gauge (1), the pneumatic emergency shut-off valve (2), the pressure transmitter (3) and the manual shut-off valve (4) are connected in sequence through pipelines; each of the high-pressure gas collection units also comprises a venting pipeline and a venting ball valve (5), and the high-pressure station entry device also comprises a throttle valve (6), and the pipeline before the pressure gauge (1) of each high-pressure gas collection unit is connected to the venting ball valve (5) through a venting pipeline, and the plurality of venting ball valves (5) are connected to the throttle valve (6); The medium-pressure station entry device comprises a plurality of medium-pressure gas collection units, each of which comprises a pressure detection gauge (7) and a shut-off valve (8), and the pressure detection gauge (7) and the shut-off valve (8) are connected in sequence through pipelines; each of the medium-pressure gas collection units also comprises an overpressure automatic venting pipeline and a venting gate valve (9), and the medium-pressure station entry device also comprises a safety valve (10), and the pipeline in front of the pressure detection gauge (7) of each medium-pressure gas collection unit is connected to the venting gate valve (9) through an overpressure automatic venting pipeline, and the venting gate valves (9) of each route are connected to the safety valve (10).

2. The double-layer station entry integrated device for the upper and lower Guhe mining station of the gas field as claimed in claim 1 is characterized by: The pneumatic emergency shut-off valve (2) is provided with a remote switch and an overpressure automatic shut-off switch.

3. The double-layer station entry integrated device for the upper and lower Guhe mining station of the gas field as claimed in claim 2 is characterized by: The pressure transmitter (3) is interlocked with the pneumatic emergency shut-off valve (2), and the pressure transmitter (3) is provided with high and low pressure alarm devices.

4. The double-layer station entry integrated device for the upper and lower Guhe mining station of the gas field as claimed in claim 3 is characterized by: The medium-pressure station entry device also includes a gas production pressure transmitter (11), which is connected to a pipeline between a venting gate valve (9) and a pressure detection gauge (7) of a medium-pressure gas production unit.

5. The double-layer station entry integrated device for the upper and lower Guhe mining station of the gas field as claimed in claim 4 is characterized by: The upper and lower layers of the high-voltage station entry device and the medium-voltage station entry device are divided by a steel structure ladder platform.

6. The double-layer station entry integrated device for the upper and lower Guhe mining station of the gas field as claimed in claim 1 is characterized by: The throttle valve (6) is an angle throttle valve.

7. An integration method for the double-layer station entry integrated device of the upper and lower Guhe mining station of the gas field according to claim 5, characterized in that: The specific steps are: The natural gas entering each high-pressure gas collection unit in the high-pressure inlet station device enters the pneumatic emergency shut-off valve (2) after being detected by the pressure gauge (1), then enters the manual shut-off valve (4) after being detected by the pressure transmitter (3), and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through the venting pipeline and the venting ball valve (5); The natural gas entering each medium-pressure gas production unit in the medium-pressure station inlet device enters the cut-off valve (8) after being detected by the pressure detection gauge (7), and finally enters other process systems of the gas gathering station; when the natural gas pressure is higher than the set value, the natural gas is vented to normal pressure through the overpressure automatic venting pipeline and the venting gate valve (9).

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