阅读说明：本技术 一种快速可装配式天然气井口采气装置 (But quick assembled natural gas well head gas production device ) 是由 严海超 孙丹 张轲 于 2021-09-03 设计创作，主要内容包括：一种快速可装配式天然气井口采气装置,属于天然气采气装置领域,其特征在于：包括采气管线、排液管线、排液罐和PLC控制器；所述采气管线、排液管线、排液罐和PLC控制器设置于同一撬块上；天然气自采气树流入本装置,经过角式智能调节阀、紧急切断阀流入排液罐,其中液相物质储存在排液罐中,天然气从排液罐上口流出,经过过滤器和天然气流量计后流出汇入去集气站总管线。注醇流程经过手动球阀、天然气出口手动截止阀、注醇出口截止阀流入采气树注醇口；本发明所述快速可装配式天然气井口采气装置功耗低,运行安全可靠,简便施工,大大提高了天然气井口安装调试的效率,实用性更强,适于推广使用。(The utility model provides a but quick assembled natural gas well head gas production device, belongs to natural gas production device field, its characterized in that: comprises a gas production pipeline, a liquid discharge tank and a PLC controller; the gas production pipeline, the liquid discharge tank and the PLC are arranged on the same skid block; natural gas flows into this device from gas production tree, through angle formula intelligent regulation valve, quick action emergency valve inflow fluid-discharge tank, and wherein liquid phase material stores in the fluid-discharge tank, and the natural gas flows out from the fluid-discharge tank upper shed, flows out after filter and natural gas flowmeter and converges and goes the gas collecting station main line. The alcohol injection flow flows into an alcohol injection port of the gas production tree through a manual ball valve, a natural gas outlet manual stop valve and an alcohol injection outlet stop valve; the fast-assembly natural gas wellhead gas production device is low in power consumption, safe and reliable in operation, simple and convenient in construction, capable of greatly improving the installation and debugging efficiency of the natural gas wellhead, strong in practicability and suitable for popularization and use.)

1. The utility model provides a but quick assembled natural gas well head gas production device which characterized in that: comprises a gas production pipeline, a liquid discharge tank and a PLC controller; the gas production pipeline, the liquid discharge tank and the PLC are arranged on the same skid block;

the gas production pipeline comprises a natural gas production interface, an angle type intelligent regulating valve, an emergency cut-off valve and a liquid discharge tank inlet stop valve which are sequentially connected through a pipeline, and a liquid discharge tank natural gas outlet valve, a filter, a differential pressure transmitter, a natural gas flowmeter, a natural gas outlet manual stop valve and a natural gas outlet which are sequentially connected through a pipeline; the drain tank inlet stop valve and the drain tank natural gas outlet valve are communicated with the drain tank;

the liquid discharge pipeline comprises a liquid discharge tank automatic liquid discharge valve, a liquid discharge tank manual liquid discharge stop valve and a liquid discharge tank sewage gas collection station interface which are sequentially connected through pipelines; the automatic drain valve of the drain tank is communicated with the drain tank;

the angle type intelligent regulating valve, the emergency cut-off valve, the filter, the differential pressure transmitter, the natural gas flowmeter and the automatic liquid discharge valve of the liquid discharge tank are all connected with the PLC.

2. The fast assemblable natural gas wellhead gas production device of claim 1, wherein: also comprises an alcohol injection pipeline; the alcohol injection pipeline comprises a methanol self-gas-collecting station interface, an alcohol injection pipeline local pressure gauge, a manual ball valve, an alcohol injection check valve, an alcohol injection outlet stop valve and a gas production tree alcohol injection interface which are sequentially connected through pipelines; the alcohol injection pipeline is arranged on the prying block.

3. A fast-assemblable natural gas wellhead gas production device as claimed in claim 1 or claim 2, in which: an oil pressure in-place pressure meter and an oil pressure remote transmission pressure transmitter are sequentially arranged between the natural gas production interface and the angle type intelligent regulating valve;

a pipe pressure local pressure gauge, a pipe pressure remote transmission pressure transmitter and a temperature transmitter are sequentially arranged between the emergency cut-off valve and the drain tank wellhead stop valve;

a drainage electromagnetic flowmeter is arranged between the automatic drainage valve of the drainage tank and the manual drainage stop valve of the drainage tank;

the oil pressure remote transmission pressure transmitter, the pipe pressure local pressure gauge, the temperature transmitter and the liquid discharge electromagnetic flowmeter are all connected with the PLC.

4. The fast assemblable natural gas wellhead gas production device of claim 3, wherein: also includes a bypass line; one end of the bypass pipeline is communicated with a pipeline between the temperature transmitter and the drain tank wellhead stop valve; the other end of the bypass pipeline is communicated with a filter and a pipeline between a differential pressure transmitter and a natural gas outlet valve of a liquid discharge tank; and control gate valves are arranged at two ends of the bypass pipeline.

5. The fast assemblable natural gas wellhead gas production device of claim 4, wherein: a bypass pipeline flange interface is arranged between the natural gas outlet valve of the liquid discharge tank, the filter and the differential pressure transmitter; the bypass line flange interface is connected with the other end of the bypass line.

6. The fast assemblable natural gas wellhead gas production device of claim 5, wherein: a liquid discharge tank magnetic turning plate liquid level meter is arranged on the liquid discharge tank; and the magnetic turning plate liquid level meter of the liquid discharge tank is connected with the PLC.

7. The fast assemblable natural gas wellhead gas production device of claim 6, wherein: and an output pipeline outlet manual gate valve is arranged between the natural gas outlet and the natural gas outlet manual stop valve.

8. The fast assemblable natural gas wellhead gas production device of claim 7, wherein: the PLC is provided with a gas production tree casing pressure interface and a Modbus TCP/IP port.

9. The fast assemblable natural gas wellhead gas production device of claim 8, wherein: the PLC is connected with the solar power supply.

Technical Field

The invention belongs to the field of natural gas production devices, and particularly relates to a rapid assembly type natural gas wellhead gas production device.

Background

With the continuous development of science and technology and society in recent years, the living and production levels of people are greatly improved, and because natural gas only generates carbon dioxide and water in the combustion process, the generated carbon dioxide is only about 40 percent of the combustion of coal, and no waste residue is generated after combustion, the natural gas has the advantages of good use safety, high heat value and the like compared with energy sources such as coal, petroleum and the like, and is favored by people. The reserves of natural gas in China are huge, and the natural gas is used as a clean energy source and extremely accords with the national energy-saving and environment-friendly concept. However, if the process is improper in the natural gas exploitation process, leakage is easy to cause danger, and natural gas exploitation well sites are scattered and difficult to monitor.

Under the trend of rapid development of the natural gas industry, the current most natural gas field ground gathering and transportation engineering natural gas well mouth construction schemes continue to use various professional fields to carry out equipment installation and debugging, the manpower investment is large, particularly in winter construction, the field construction difficulty is large, the construction quality is not too high, repeated reworking can be caused, the cost investment is increased, and the construction period is delayed.

Disclosure of Invention

The invention aims to solve the problems and provides a rapid assembly type natural gas wellhead gas production device.

The invention relates to a rapid assembly type natural gas wellhead gas production device which comprises a gas production pipeline, a liquid discharge tank and a PLC (programmable logic controller); the gas production pipeline, the liquid discharge tank and the PLC are arranged on the same skid block;

the gas production pipeline comprises a natural gas production interface, an angle type intelligent regulating valve, an emergency cut-off valve and a liquid discharge tank inlet stop valve which are sequentially connected through a pipeline, and a liquid discharge tank natural gas outlet valve, a filter, a differential pressure transmitter, a natural gas flowmeter, a natural gas outlet manual stop valve and a natural gas outlet which are sequentially connected through a pipeline; the drain tank inlet stop valve and the drain tank natural gas outlet valve are communicated with the drain tank;

the liquid discharge pipeline comprises a liquid discharge tank automatic liquid discharge valve, a liquid discharge tank manual liquid discharge stop valve and a liquid discharge tank sewage gas collection station interface which are sequentially connected through pipelines; the automatic drain valve of the drain tank is communicated with the drain tank;

the angle type intelligent regulating valve, the emergency cut-off valve, the filter, the differential pressure transmitter, the natural gas flowmeter and the automatic liquid discharge valve of the liquid discharge tank are all connected with the PLC.

Furthermore, the fast assembly type natural gas wellhead gas production device also comprises an alcohol injection pipeline; the alcohol injection pipeline comprises a methanol self-gas-collecting station interface, an alcohol injection pipeline local pressure gauge, a manual ball valve, an alcohol injection check valve, an alcohol injection outlet stop valve and a gas production tree alcohol injection interface which are sequentially connected through pipelines; the alcohol injection pipeline is arranged on the prying block.

Further, the invention relates to a rapid assembly type natural gas wellhead gas production device, which is characterized in that: an oil pressure in-place pressure meter and an oil pressure remote transmission pressure transmitter are sequentially arranged between the natural gas production interface and the angle type intelligent regulating valve;

a pipe pressure local pressure gauge, a pipe pressure remote transmission pressure transmitter and a temperature transmitter are sequentially arranged between the emergency cut-off valve and the drain tank wellhead stop valve;

a drainage electromagnetic flowmeter is arranged between the automatic drainage valve of the drainage tank and the manual drainage stop valve of the drainage tank;

the oil pressure remote transmission pressure transmitter, the pipe pressure local pressure gauge, the temperature transmitter and the liquid discharge electromagnetic flowmeter are all connected with the PLC.

Furthermore, the rapid assembly type natural gas wellhead gas production device also comprises a bypass pipeline; one end of the bypass pipeline is communicated with a pipeline between the temperature transmitter and the drain tank wellhead stop valve; the other end of the bypass pipeline is communicated with a filter and a pipeline between a differential pressure transmitter and a natural gas outlet valve of a liquid discharge tank; both ends of the bypass pipeline are provided with control gate valves; the bypass pipeline is communicated with the pipelines at two sides of the liquid discharge tank, the normal use of the flow is not influenced when the liquid discharge tank is in fault or in maintenance engineering, and the control gate valves at two ends of the liquid discharge tank control whether the flow of the liquid discharge tank is put into or cut off; the maintenance efficiency is improved.

Further, according to the rapid assembly type natural gas wellhead gas production device, a bypass pipeline flange interface is arranged between the natural gas outlet valve of the liquid discharge tank, the filter and the differential pressure transmitter; the bypass line flange interface is connected with the other end of the bypass line. The bypass pipeline flange connector is arranged to realize quick and convenient connection of the bypass pipeline, and construction efficiency is improved.

Further, according to the rapid assembly type natural gas wellhead gas production device, a liquid discharge tank is provided with a magnetic turning plate liquid level meter; and the magnetic turning plate liquid level meter of the liquid discharge tank is connected with the PLC.

Further, according to the rapid assembly type natural gas wellhead gas production device, an external pipeline outlet manual gate valve is arranged between the natural gas outlet and the natural gas outlet manual stop valve; through setting up export manual gate valve of defeated pipeline, close the gas transmission main line through manual before putting into production.

Further, the rapid assembly type natural gas wellhead gas production device is characterized in that the PLC is provided with a gas production tree casing pressure interface and a Modbus TCP/IP port.

Further, according to the rapid assembly type natural gas wellhead gas production device, the PLC is connected with the solar power supply; the solar power supply can effectively reduce wiring and improve construction efficiency.

According to the rapid assembly type natural gas wellhead gas production device, natural gas flows into the device from a gas production tree, flows into the liquid discharge tank through the angle type intelligent regulating valve and the emergency cut-off valve, wherein liquid phase substances are stored in the liquid discharge tank, and the natural gas flows out from the upper opening of the liquid discharge tank, flows out through the filter and the natural gas flowmeter and then flows into a main pipeline of the gas collection station. The alcohol injection flow flows into an alcohol injection port of the gas production tree through a manual ball valve, a natural gas outlet manual stop valve and an alcohol injection outlet stop valve; the fast-assembly natural gas wellhead gas production device is low in power consumption, safe and reliable in operation, simple and convenient in construction, capable of greatly improving the installation and debugging efficiency of the natural gas wellhead, strong in practicability and suitable for popularization and use.

Drawings

FIG. 1 is a schematic structural diagram of a fast-assembly natural gas wellhead gas production device according to the invention;

FIG. 2 is a schematic structural diagram of a fast-assembly natural gas wellhead gas production device according to the embodiment;

fig. 3 is a schematic diagram illustrating a connection between a PLC controller and a detection device according to this embodiment;

wherein 1-oil pressure local pressure gauge, 2-oil pressure remote transmission pressure transmitter, 3-angle type intelligent regulating valve, 4-emergency cut-off valve, 5-pipe pressure local pressure gauge, 6-pipe pressure remote transmission pressure transmitter, 7-temperature transmitter, 8-liquid discharge tank inlet stop valve, 9-liquid discharge tank magnetic turnover liquid level meter, 10-liquid discharge tank, 11-liquid discharge tank automatic liquid discharge valve, 12-liquid discharge electromagnetic flowmeter, 13-liquid discharge tank natural gas outlet valve, 14-liquid discharge tank manual liquid discharge stop valve, 15-bypass pipeline flange interface, 16-filter and differential pressure transmitter, 17-natural gas flowmeter, 18-alcohol injection pipeline local pressure gauge, 19-manual ball valve, 20-natural gas outlet manual stop valve, 21-alcohol injection check valve, 22-an alcohol injection outlet stop valve, 23-an external pipeline outlet manual gate valve, 24-a prying block and 25-a bypass pipeline.

Detailed Description

The fast-assembling natural gas wellhead gas production device of the invention is described in detail by the attached drawings and the embodiments.

The rapid assembly type natural gas wellhead gas production device disclosed by the embodiment of the disclosure comprises a gas production pipeline, a liquid discharge tank 10 and a PLC (programmable logic controller), as shown in FIGS. 1 and 2; wherein A is from the gas tree gas outlet interface of natural gas production, B is the methanol to the tree of gas production and annotates the alcoholic interface, C is the natural gas and goes to the pipeline interface of gas station, D is the methanol and comes from the gas station interface of gas collection, E is the liquid discharge tank sewage goes to the gas station interface; the gas production pipeline, the liquid discharge tank 10 and the PLC are arranged on the same skid block 24; also comprises an alcohol injection pipeline; the alcohol injection pipeline comprises a methanol self-gas-collecting station interface, an alcohol injection pipeline local pressure gauge 18, a manual ball valve 19, an alcohol injection check valve 21, an alcohol injection outlet stop valve 22 and a gas production tree alcohol injection interface which are sequentially connected through pipelines; the alcohol injection line is disposed on the aforementioned pry block 24. The gas production pipeline comprises a natural gas production interface, an angle type intelligent regulating valve 3, an emergency cut-off valve 4 and a liquid discharge tank inlet stop valve 8 which are sequentially connected through a pipeline, and a liquid discharge tank natural gas outlet valve 13, a filter, a differential pressure transmitter 16, a natural gas flowmeter 17, a natural gas outlet manual stop valve 20 and a natural gas outlet which are sequentially connected through a pipeline; the drain tank inlet stop valve 8 and the drain tank natural gas outlet valve 13 are both communicated with the drain tank 10; the liquid discharge pipeline comprises a liquid discharge tank automatic liquid discharge valve 11, a liquid discharge tank manual liquid discharge stop valve 14 and a liquid discharge tank 10 sewage gas collection station interface which are connected in sequence through pipelines; the automatic drain valve 11 of the drain tank is communicated with the drain tank 10.

In the embodiment of the disclosure, an oil pressure local pressure gauge 1 and an oil pressure remote transmission pressure transmitter 2 are sequentially arranged between the natural gas production interface and the angle type intelligent regulating valve 3; a pipe pressure local pressure gauge 5, a pipe pressure remote transmission pressure transmitter 6 and a temperature transmitter 7 are sequentially arranged between the emergency cut-off valve 4 and the drain tank 10 well head stop valve; a drainage electromagnetic flow meter 12 is arranged between the automatic drainage valve 11 of the drainage tank and the manual drainage stop valve 14 of the drainage tank.

The fast assembling type natural gas wellhead gas production device of the embodiment of the disclosure further comprises a bypass pipeline 25; one end of the bypass pipeline 25 is communicated with a pipeline between the temperature transmitter 7 and the wellhead stop valve of the liquid discharge tank 10; the other end of the bypass pipeline 25 is communicated with a pipeline between the filter and differential pressure transmitter 16 and the natural gas outlet valve 13 of the liquid discharge tank; both ends of the bypass pipeline are provided with control gate valves; the bypass pipeline 25 is communicated with pipelines at two sides of the liquid discharge tank 10, the main function is that the normal use of the flow is not influenced when the liquid discharge tank 10 is in failure or in maintenance engineering, and the control gate valves at two ends of the liquid discharge tank 10 are used for controlling whether the flow of the liquid discharge tank 10 is put into or cut off; the maintenance efficiency is improved. Meanwhile, a bypass pipeline flange interface 15 is arranged between the natural gas outlet valve 13 of the liquid discharge tank and the filter and differential pressure transmitter 16; the bypass line flange connection 15 is connected to the other end of the aforementioned bypass line 25. The bypass pipeline 25 is connected quickly and conveniently by arranging the bypass pipeline flange connector 15, and construction efficiency is improved.

In the embodiment of the disclosure, the angle type intelligent regulating valve 3, the emergency cut-off valve 4, the filter and differential pressure transmitter 16, the natural gas flowmeter 17 and the automatic drain valve 11 of the drain tank are all connected with the PLC controller; the oil pressure remote transmission pressure transmitter 2, the pipe pressure local pressure gauge 5, the temperature transmitter 7 and the liquid discharge electromagnetic flowmeter 12 are all connected with the PLC.

In the embodiment of the present disclosure, a liquid discharge tank magnetic turning plate liquid level meter 9 is arranged on the liquid discharge tank 10; and the liquid level meter 9 of the magnetic turning plate of the liquid discharge tank is connected with the PLC. The PLC is provided with a gas production tree casing pressure interface and a Modbus TCP/IP port; the PLC is connected with the solar power supply. An export manual gate valve 23 of an export pipeline is arranged between the natural gas outlet and the natural gas export manual stop valve 20; before production, the gas transmission main pipeline is closed in a manual mode through the manual gate valve 23 arranged at the outlet of the external transmission pipeline.

The specific models used for the components such as meters and valves in this embodiment are shown in table 1 below.

TABLE 1

In the embodiment of the present disclosure, the PLC is a main device for data acquisition and remote transmission, and as shown in fig. 3, the PLC mainly performs detection including detection of bottom casing pressure of a natural gas production tree, detection of oil pressure of an outlet pipeline of a natural gas well, detection of pressure of a rear pipe of a natural gas shut-off valve, detection of temperature of the outlet pipeline of the natural gas well, detection of liquid level of a liquid discharge tank 10, detection of liquid discharge flow of the liquid discharge tank 10, detection of differential pressure of a filter, detection of opening of a flow regulating valve, detection of state of an emergency shut-off valve 4, and detection of state of the liquid discharge valve; the interlocking control comprises the steps of controlling a wellhead intelligent flow regulating valve, controlling an emergency cut-off valve 4 by a digital output module to achieve the interlocking cut-off function, and controlling the liquid level of a liquid discharge tank 10 by the digital output module to achieve the liquid level interlocking function of the liquid discharge tank 10; meanwhile, the Modbus TCP/IP port in the PLC is transmitted to a far-end Ethernet switch through an armored network cable, so that remote transmission is realized.

The quick assembly type natural gas wellhead gas production device disclosed by the embodiment of the disclosure adopts a skid-mounted structure, so that the structure is compact, and the space is saved; because the skid-mounted device adopts intensive arrangement, arrange compactly, this can great reduction occupation of land to the more natural gas trade that occupies of land. Before the device is arranged, most work is finished in a factory, and field installation only needs to install the prying block 24 at a preset position, connect the inlet and outlet pipelines of the prying block 24 and connect part of the electric instruments, so that the field workload and the installation time can be greatly reduced. Meanwhile, the probability of design errors can be avoided through standardization, the design errors can be found in a factory, and the field construction rework condition can be greatly reduced through advanced equipment and construction environment of the factory.

When the device is assembled, the purchased instruments and valve devices shown in table 1 are tested and used after being qualified. After the skid-mounted complete process equipment is completely installed, the electric instrument is installed and wired to the skid-mounted wiring box, and then the grounding wire and the equipotential bridging work are completed. The field devices are powered by Direct Current (DC) 24V, and then distributed in the PLC, and enough branches are reserved for supplying power to the field bus instrument devices.

When the rapid assembly type natural gas wellhead gas production device in the embodiment of the disclosure is operated, the rapid assembly type natural gas wellhead gas production device operates according to the following control logic:

1. when the pressure behind the wellhead valve is higher than 7.5MPa, alarm information is sent to a downstream user;

2. when the pressure behind the wellhead valve is higher than 7.6MPa, the emergency cut-off valve 4 is cut off in an interlocking manner;

3. when the pressure behind the wellhead valve is lower than 5.0MPa, sending alarm information to a downstream user;

4. when the pressure behind the well head valve is lower than 4.0MPa, the emergency cut-off valve 4 is cut off in an interlocking manner;

5. when the pressure in front of the wellhead valve is higher than 5.0Mpa, the pressure value needs to be adjusted after the regulating valve is set, the pressure behind the automatic control valve is not lower than a certain upper limit value and not lower than a certain lower limit value, and the upper limit value and the lower limit value need to be set by a user according to field process conditions;

6. the liquid discharge valve is opened when the liquid level of the liquid discharge tank 10 is higher than 80% (which can be set by self), and is closed when the liquid level is lower than 20% (which can be set by self);

7. and the gas flowmeter and the liquid discharge flowmeter carry out data transmission through an RS485-Modbus PLC protocol, and transmit the instantaneous flow and the accumulated flow to the PLC.

As described in the above embodiment, the fast-assemblable natural gas wellhead gas production device of the present invention can perform system debugging in a factory according to various situations, complete joint debugging of a system after single-circuit testing, mainly aim at parameters with many interlock conditions and complex control relationships, and have many associations between the parameters, and can perform testing and setting by using a forced and assumed method, so as to perfect the system and better achieve a control target.

Meanwhile, the actual debugging can be carried out on site after the device arrives at the site, and the reliability and the safety of the device need to be paid attention to at the same time; the integrity of a system program is always required to be met in the debugging process, and meanwhile, the fault point is analyzed by combining a specific application scene to solve.