CN108678729B - Automatic monitoring device and method for accumulated liquid level of high-pressure gas well shaft - Google Patents
Automatic monitoring device and method for accumulated liquid level of high-pressure gas well shaft Download PDFInfo
- Publication number
- CN108678729B CN108678729B CN201810836603.3A CN201810836603A CN108678729B CN 108678729 B CN108678729 B CN 108678729B CN 201810836603 A CN201810836603 A CN 201810836603A CN 108678729 B CN108678729 B CN 108678729B
- Authority
- CN
- China
- Prior art keywords
- pressure
- gas
- explosion
- balance
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
- E21B47/047—Liquid level
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
Abstract
The invention discloses an automatic monitoring device and method for the accumulated liquid level of a high-pressure gas well shaft, wherein the device comprises an explosion-proof monitoring executing mechanism arranged at the mouth of the high-pressure gas well shaft and a tail gas discharging mechanism connected with the explosion-proof monitoring executing mechanism and used for discharging tail gas to a production pipeline; the method comprises the following steps: 1. installing an automatic monitoring device; 2. balancing air inlet of the air bin; 3. the generation of airflow explosion and the recovery of tail gas; 4. monitoring the accumulated liquid level of a high-pressure gas well shaft; 5. the third step to the fourth step are repeated for a plurality of times, so that the liquid level of the high-pressure gas well shaft can be monitored for a plurality of times; 6. decompression and disassembly of the explosion-proof monitoring executing mechanism. The invention can continuously and automatically monitor the accumulated liquid level of the shaft without personnel intervention in the natural gas well in real time under the high-pressure corrosive gas-containing environment, greatly reduces the operation cost and improves the operation efficiency and the safety.
Description
Technical Field
The invention belongs to the technical field of high-pressure gas well shaft accumulated liquid level monitoring, and particularly relates to an automatic high-pressure gas well shaft accumulated liquid level monitoring device and method.
Background
The liquid level of the well is the liquid column surface formed by the seepage of free water, hydrocarbon condensate and gas in the stratum into the well during normal production of the well, the liquid level of the well is generally represented by the depth from the well mouth to the liquid level, the value of the liquid level directly reflects the quantity of liquid in the well, in the process of exploiting the well, excessive liquid accumulation, increased bottom hole pressure, reduced yield of the well, serious accidents such as flooding and blowout of the well can be caused, in the working of the well, real-time monitoring and liquid accumulation control operation must be carried out on the liquid accumulation of the well to keep the liquid accumulation of the well at a reasonable height, therefore, the liquid level of the well is an important index for reflecting the gas supply capacity of the stratum, is an indispensable parameter for the production field management of the natural gas well, and has important significance in the production of the natural gas.
In gas well development, a portable manual shaft accumulated liquid level testing device is generally used for testing the shaft accumulated liquid level, and when the testing device is used for testing, personnel is required to intervene to test and analyze, so that the testing efficiency is low, the testing cost is high, real-time monitoring is not realized, and the production control is extremely unfavorable; at present, a few areas are introduced into foreign remote monitoring and testing devices to perform liquid level testing, but the liquid level testing is limited to testing in a low-pressure gas well, and the testing cannot be performed for a high-pressure gas well with the pressure exceeding 30 MPa.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft, which has novel and reasonable design, can continuously and automatically monitor the accumulated liquid level of the well shaft without human intervention on the natural gas well under the environment of high pressure and corrosive gas, greatly reduces the operation cost, improves the operation efficiency and the safety, and is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the following technical scheme: the device comprises an explosion-proof monitoring executing mechanism arranged at the wellhead of the high-pressure gas well and a tail gas discharging mechanism connected with the explosion-proof monitoring executing mechanism and used for discharging tail gas to a production pipeline; the anti-explosion monitoring executing mechanism comprises an anti-explosion shell, a balance air bin and a circuit control box, wherein the balance air bin and the circuit control box are arranged in the anti-explosion shell, a high-pressure electromagnetic valve is arranged at the air inlet end of the balance air bin, a pressure limiting valve is arranged at the air outlet end of the balance air bin, a wellhead connecting cylinder penetrates through the anti-explosion shell and is divided into two paths, one path is communicated with the high-pressure electromagnetic valve, and the other path is communicated with the pressure limiting valve through a pressure limiting valve back pressure pipe; the well mouth connecting cylinder is internally provided with an acoustic wave collector, the pressure limiting valve comprises a valve body and a cylinder arranged in the valve body, one end of the cylinder is provided with a back pressure channel, the other end of the cylinder is provided with an air inlet channel, the cross section area of the air inlet channel is smaller than that of the cylinder, the cross section area of the air inlet channel is larger than that of the back pressure channel, the pressure limiting valve piston penetrates through the cylinder and stretches into the back pressure channel, the back pressure channel is internally provided with a pressure limiting valve back pressure piston, the pressure limiting valve back pressure piston is connected with the pressure limiting valve piston through a spring, one end of the back pressure channel, far away from the cylinder, is provided with a back pressure through hole, the cross section area of the back pressure through hole is smaller than that of the back pressure channel, the side wall of the cylinder is provided with an air outlet channel, a pressure limiting valve back pressure pipe is communicated with the back pressure through hole, and the air outlet end of the balance air bin is communicated with the air inlet channel;
the tail gas discharge mechanism comprises a tail gas connecting pipe which is communicated with the gas outlet channel and the production pipeline, a tail gas discharge valve is arranged at one end, close to the gas outlet channel, of the tail gas connecting pipe, and a tail gas pressure reducing valve is arranged at one end, close to the production pipeline, of the tail gas connecting pipe;
the wellhead connecting cylinder is provided with a first pressure sensor, the balance air bin is provided with a second pressure sensor, the circuit control box is internally provided with a microcontroller and a communication module connected with the microcontroller, and the first pressure sensor, the second pressure sensor, the sound wave collector and the high-pressure electromagnetic valve are all connected with the microcontroller.
The automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft is characterized in that: the tail gas exhaust valve is a one-way valve.
The automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft is characterized in that: the sound wave collector is a microphone.
The automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft is characterized in that: the explosion-proof shell is provided with a power interface and a communication interface, the output end of the solar power generation module supplies power to the circuit control box through the power interface, and the external computer is connected with the communication module through the communication interface.
The automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft is characterized in that: the wellhead connection cylinder is fixedly connected with a second flange plate of the wellhead of the high-pressure gas well through a first flange plate, and the first flange plate is sealed with the second flange plate through a sealing ring.
The automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft is characterized in that: and a third pressure sensor is arranged on the end face of the pressure limiting valve back pressure piston facing the spring or the end face of the pressure limiting valve piston facing the spring.
Meanwhile, the invention also discloses a method which has simple steps and reasonable design and can monitor the accumulated liquid level of the shaft of the high-pressure gas well, and is characterized by comprising the following steps:
step one, installing an automatic monitoring device, wherein the process is as follows:
step 101, mounting an explosion-proof monitoring executing mechanism: the method comprises the steps of installing a first flange plate on the end face of a wellhead connecting cylinder, fixedly connecting the wellhead connecting cylinder with a second flange plate of a high-pressure gas well cylinder through the first flange plate, sealing the first flange plate with the second flange plate through a sealing ring, communicating one end of a tail gas connecting pipe with a gas outlet channel, communicating the other end of the tail gas connecting pipe with a production pipeline, installing a tail gas discharge valve on one end, close to the gas outlet channel, of the tail gas connecting pipe, and installing a tail gas pressure reducing valve on one end, close to the production pipeline, of the tail gas connecting pipe;
step 102, communication of an explosion-proof monitoring executing mechanism: a communication interface is arranged on the explosion-proof shell, and an external computer is connected with the communication module through the communication interface;
step 103, power supply of an explosion-proof monitoring executing mechanism: a power interface is arranged on the explosion-proof shell, a solar power generation module is used for supplying power to the explosion-proof monitoring executing mechanism, the output end of the solar power generation module is connected with the power interface, and a power supply is provided for the circuit control box;
step two, balancing air inlet of an air bin, wherein the process is as follows:
step 201, opening a high-pressure ball valve arranged at the wellhead of the high-pressure gas well, and simultaneously opening a high-pressure electromagnetic valve to convey high-pressure gas in the high-pressure gas well to a wellhead connecting cylinder and then to a balance gas bin;
step 202, collecting the stress state of the spring in real time by using a third pressure sensor arranged on the end face of the back pressure piston of the pressure limiting valve facing the spring or the end face of the pressure limiting valve piston facing the spring, and when the data collected by the third pressure sensor is zero, collecting the stress state of the spring according to a formula
Acquiring the pressure P of gas in a balance gas bin 2 The unit is MPa, the high-pressure electromagnetic valve is closed, and the balance gas bin finishes gas inlet, wherein P 1 Is the pressure of gas in the wellhead connecting cylinder and P 1 >P 2 The unit is MPa, S 1 The unit of the cross section area of the back pressure piston of the pressure limiting valve is m 2 ，S 2 Is the end surface cross section area of the pressure limiting valve piston far away from one end of the spring and S 2 >S 1 In m 2 ；
Step three, generating airflow explosion and recovering tail gas: the microcontroller controls the high-pressure electromagnetic valve to be opened, high-pressure gas in the wellhead connecting cylinder is instantaneously released into the balance gas bin, the high-pressure electromagnetic valve is closed, and as the pressure in the balance gas bin is lower than the pressure in the wellhead connecting cylinder, the air pressure difference forms instantaneous air flow blasting at the moment to generate sound waves, the sound waves propagate deep in a shaft, meanwhile, the high-pressure gas released into the balance gas bin extrudes the pressure limiting valve piston, the pressure limiting valve piston extrudes a spring to compress, the high-pressure gas released into the balance gas bin is discharged from the gas outlet channel to the tail gas connecting pipe through the cylinder, and the high-pressure gas is decompressed through the tail gas decompressing valve and then is recovered into a production pipeline;
step four, monitoring the accumulated liquid level of the high-pressure gas well shaft: the sound wave collector receives reflected waves reflected by the liquid level of the well bore and transmits the received data to the microcontroller, and the microcontroller calculates the depth of the liquid level of the well bore by utilizing the time difference;
step five, repeating the steps three to four for a plurality of times, so that the accumulated liquid level of the high-pressure gas well shaft can be monitored for a plurality of times;
step six, pressure relief and disassembly of the explosion-proof monitoring executing mechanism: the method comprises the steps of presetting a safety pressure threshold of a first pressure sensor and a second pressure sensor, closing a high-pressure ball valve at the wellhead of a high-pressure gas well, detaching a tail gas connecting pipe from an air outlet channel, opening the high-pressure electromagnetic valve, discharging high-pressure gas in a wellhead connecting cylinder and a balance gas cabin from the air outlet channel, collecting the pressure in the wellhead connecting cylinder in real time by using the first pressure sensor arranged on the wellhead connecting cylinder, collecting the pressure in the balance gas cabin in real time by using the second pressure sensor arranged on the balance gas cabin, and realizing the pressure relief of the wellhead connecting cylinder and the balance gas cabin when the pressure data collected by the first pressure sensor and the second pressure sensor is not more than the safety pressure threshold, thereby realizing the pressure relief of an explosion-proof monitoring executing mechanism; the explosion proof monitoring actuator is then removed from the high pressure gas well wellhead.
Compared with the prior art, the invention has the following advantages:
1. according to the automatic monitoring device, the balance gas bin and the wellhead connecting cylinder are connected through the high-pressure electromagnetic valve, the pressure in the balance gas bin is regulated to be smaller than the pressure in the wellhead connecting cylinder through the pressure limiting valve, the gases with different high pressures are blasted by utilizing the air pressure difference to form instant airflow by opening and closing the high-pressure electromagnetic valve, sound waves are generated, the high-pressure air sources in the balance gas bin and the wellhead connecting cylinder are all from a high-pressure air well, continuous and automatic monitoring of the accumulated liquid level of a shaft without human intervention can be realized, and the automatic monitoring device is convenient to popularize and use.
2. The pressure limiting valve adopted by the automatic monitoring device is connected with the pressure limiting valve back pressure piston and the pressure limiting valve piston by using the springs, wherein the pressure limiting valve piston is communicated with the balance air bin, the pressure limiting valve back pressure piston is communicated with the wellhead connecting cylinder, the contact end surface area of the pressure limiting valve piston and the balance air bin is larger than the contact end surface area of the pressure limiting valve back pressure piston and the wellhead connecting cylinder in actual manufacture, when the spring is stressed and balanced, the air pressure in the balance air bin is smaller than the air pressure in the wellhead connecting cylinder according to stress analysis, so that reliable air pressure difference is provided for instant air blasting, and the automatic monitoring device is reliable and stable and has good use effect; in addition, when the instantaneous air blasting occurs, high-pressure air in the balance air bin can be discharged through the air outlet channel of the pressure limiting valve, so that the automatic balance air blasting device is safe and reliable, and is convenient for continuously monitoring the accumulated liquid level of the shaft.
3. According to the automatic monitoring device, the tail gas emission mechanism is arranged to enable high-pressure tail gas generated by multiple blasting to be transmitted to the production pipeline for continuous use after being decompressed, so that energy conservation and emission reduction are achieved, and pollution to the environment is avoided.
4. The method has the advantages that the steps are simple, the high-pressure gas well is utilized to provide a high-pressure gas source for the balance gas bin and the wellhead connecting cylinder, continuous and automatic monitoring of the accumulated liquid level of the shaft without human intervention is met, the pressure in the balance gas bin is ensured to be smaller than the pressure in the wellhead connecting cylinder by utilizing the stress balance of the spring, the high-pressure solenoid valve is controlled to be rapidly opened and closed, multiple blasting is realized, a plurality of pieces of accumulated liquid level monitoring data of the shaft are obtained, redundant high-pressure gas in the balance gas bin after each blasting is discharged into the tail gas connecting pipe through the pressure limiting valve, the high-pressure gas is recycled into the production pipeline for continuous use after being depressurized through the tail gas depressurization valve, the energy is saved and the emission is reduced, the pressure in the wellhead connecting cylinder can be detected by the first pressure sensor, the pressure in the balance gas bin can be detected by the second pressure sensor, the explosion-proof monitoring executing mechanism is prevented from being dismounted under pressure, the personal safety of operators is ensured, and the popularization and the use is convenient.
In conclusion, the invention has novel and reasonable design, can continuously and automatically monitor the accumulated liquid level of the shaft without human intervention on the natural gas well under the high-pressure corrosive gas-containing environment, greatly reduces the operation cost, improves the operation efficiency and the safety, and is convenient to popularize and use.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic structural connection diagram of an automatic monitoring device adopted by the invention.
Fig. 2 is a schematic structural diagram of a pressure limiting valve in an automatic monitoring device according to the present invention.
Fig. 3 is a flow chart of the method of the present invention.
Reference numerals illustrate:
1-a tail gas exhaust valve; 2-a tail gas connecting pipe; 3-a tail gas pressure reducing valve;
4-a production line; 15-a first pressure sensor; 16-a pressure limiting valve back pressure pipe;
17-a pressure limiting valve; 17-1-backpressure through holes; 17-2-an air intake passage;
17-3-outlet channels; 17-4, a back pressure piston of a pressure limiting valve;
17-5-springs; 17-6, a pressure limiting valve piston; 17-7, valve body;
17-8-cylinder; 17-9-backpressure channel; 18-an acoustic wave collector;
19-a second pressure sensor; 20-balancing the gas bin; 21-high pressure solenoid valve;
22-a wellhead connection cartridge; 23-a sealing ring; 28-a circuit control box;
29-a power interface; 30-a communication interface; 31-explosion-proof shell.
Detailed Description
As shown in fig. 1 and 2, the automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft comprises an explosion-proof monitoring executing mechanism arranged at the well head of the high-pressure gas well and a tail gas discharging mechanism connected with the explosion-proof monitoring executing mechanism and used for discharging tail gas to a production pipeline 4; the explosion-proof monitoring executing mechanism comprises an explosion-proof shell 31, a balance air bin 20 and a circuit control box 28, wherein the balance air bin 20 and the circuit control box 28 are arranged in the explosion-proof shell 31, a high-pressure electromagnetic valve 21 is arranged at the air inlet end of the balance air bin 20, a pressure limiting valve 17 is arranged at the air outlet end of the balance air bin 20, a wellhead connecting cylinder 22 penetrates through the explosion-proof shell 31 and is divided into two paths, one path is communicated with the high-pressure electromagnetic valve 21, and the other path is communicated with the pressure limiting valve 17 through a pressure limiting valve back pressure pipe 16; the acoustic wave collector 18 is arranged in the wellhead connection cylinder 22, the pressure limiting valve 17 comprises a valve body 17-7 and a cylinder 17-8 arranged in the valve body 17-7, a back pressure channel 17-9 is formed at one end of the cylinder 17-8, an air inlet channel 17-2 is formed at the other end of the cylinder 17-8, the cross section area of the air inlet channel 17-2 is smaller than that of the cylinder 17-8, the cross section area of the air inlet channel 17-2 is larger than that of the back pressure channel 17-9, the pressure limiting valve piston 17-6 penetrates through the cylinder 17-8 and stretches into the back pressure channel 17-9, a pressure limiting valve back pressure piston 17-4 is arranged in the back pressure channel 17-9 and is connected with the pressure limiting valve piston 17-6 through a spring 17-5, a back pressure through hole 17-1 is formed at one end of the back pressure channel 17-9 far away from the cylinder 17-8, the cross section area of the back pressure through hole 17-1 is smaller than that of the back pressure channel 17-9, an air outlet channel 17-3 is formed in the side wall of the cylinder 17-8, the pressure limiting valve back pressure pipe 16 is communicated with the back pressure through hole 17-1, and the air outlet end 20 is communicated with the air inlet channel 17-2;
the tail gas discharging mechanism comprises a tail gas connecting pipe 2 which is communicated with the gas outlet channel 17-3 and the production pipeline 4, a tail gas discharging valve 1 is arranged at one end, close to the gas outlet channel 17-3, of the tail gas connecting pipe 2, and a tail gas reducing valve 3 is arranged at one end, close to the production pipeline 4, of the tail gas connecting pipe 2;
the wellhead connection cylinder 22 is provided with a first pressure sensor 15, the balance gas bin 20 is provided with a second pressure sensor 19, the circuit control box 28 is internally provided with a microcontroller and a communication module connected with the microcontroller, and the first pressure sensor 15, the second pressure sensor 19, the sound wave collector 18 and the high-pressure electromagnetic valve 21 are all connected with the microcontroller.
The purpose of the high-pressure electromagnetic valve 21 is to connect the balance gas bin 20 and the wellhead connecting tube 22, the purpose of the pressure limiting valve 17 is to adjust the gas pressure in the balance gas bin 20 to be smaller than the gas pressure in the wellhead connecting tube 22, the gas with different pressures is made by opening and closing the high-pressure electromagnetic valve 21, the instant airflow explosion is formed by utilizing the gas pressure difference to generate sound waves, and the high-pressure gas sources in the balance gas bin 20 and the wellhead connecting tube 22 are all from the high-pressure gas well, so that continuous and automatic monitoring of the wellbore accumulated liquid level without human intervention can be realized; the wellhead connection cylinder 22 passes through the explosion-proof shell 31 to be divided into two paths, one path is communicated with the high-pressure electromagnetic valve 21 so as to conveniently convey high-pressure gas into the balance gas bin 20, the other path is communicated with the pressure limiting valve 17 through the pressure limiting valve back pressure pipe 16 so that the high-pressure gas in the wellhead connection cylinder 22 extrudes the pressure limiting valve back pressure piston 17-4, the spring 17-5 is in a compressed state, when the wellhead connection cylinder 22 conveys the high-pressure gas into the balance gas bin 20, the pressure limiting valve piston 17-6 extrudes the spring 17-5 so that the spring 17-5 gradually recovers deformation, the purpose that the pressure limiting valve piston 17-6 in the pressure limiting valve 17 stretches into the back pressure channel 17-9 through the cylinder 17-8 is to avoid that the pressure limiting valve back pressure piston 17-4 extrudes the spring 17-5 and then enters the cylinder 17-8, the high-pressure gas in the wellhead connection cylinder 22 flows out of the gas outlet channel 17-3, the cross section area of the gas inlet channel 17-2 is smaller than the cross section area of the gas cylinder 17-8 to limit the pressure limiting valve piston 17-6, a back pressure through hole 17-1 is formed in one end of the back pressure channel 17-9 far away from the gas cylinder 17-8, the cross section area of the back pressure through hole 17-1 is smaller than the cross section area of the back pressure channel 17-9 to limit the pressure limiting valve back pressure piston 17-4, the cross section area of the gas inlet channel 17-2 is larger than the cross section area of the back pressure channel 17-9 to ensure that the gas pressure in the balance gas bin 20 is smaller than the gas pressure in the wellhead connection cylinder 22 when the spring is stressed and balanced, so that reliable gas pressure difference is provided for instant gas flow explosion, and the back pressure is reliable and stable, and good use effect are achieved; in addition, when instantaneous air blasting occurs, high-pressure air in the balance air bin 20 can be discharged through the air outlet channel 17-3 of the pressure limiting valve 17, so that the method is safe and reliable and is convenient for continuously monitoring the accumulated liquid level of the shaft.
The purpose of setting up tail gas emission mechanism is in order to carry out the continuous use in carrying the production pipeline 4 to the high-pressure tail gas that produces through the decompression with many times blasting, and energy saving and emission reduction does not produce the pollution to the environment, in this embodiment, tail gas discharge valve 1 is the check valve, makes in the balanced gas storehouse 20 gas can release production pipeline 4 fast, recycle, and the gas in the production pipeline 4 then is blocked, can not reverse entering in the balanced gas storehouse 20 through tail gas discharge valve 1 makes the pressure in the balanced gas storehouse 20 rise, avoids monitoring devices unable to test.
In this embodiment, the acoustic wave harvester 18 is a microphone.
In this embodiment, the explosion-proof housing 31 is provided with a power interface 29 and a communication interface 30, the output end of the solar power generation module supplies power to the circuit control box 28 through the power interface 29, and the external computer is connected with the communication module through the communication interface 30.
During actual use, because the high-pressure gas well is usually in the field, the cost is high when the commercial power is arranged or the battery is adopted for power supply, the maintenance is not facilitated, the solar energy is a clean energy source, the solar energy power generation system is suitable for the field environment, the solar energy power generation module is used for supplying power to the explosion-proof monitoring executing mechanism, the system is clean and pollution-free, and the system can be used for a long time and has a good effect.
In this embodiment, the wellhead connection sleeve 22 is fixedly connected to the second flange of the wellhead of the high-pressure gas well through a first flange, and the first flange and the second flange are sealed by a sealing ring 23.
In this embodiment, a third pressure sensor is mounted on the end face of the pressure limiting valve back pressure piston 17-4 facing the spring 17-5 or on the end face of the pressure limiting valve piston 17-6 facing the spring 17-5.
It should be noted that, the purpose of installing the third pressure sensor on the end face of the pressure limiting valve back pressure piston 17-4 facing the spring 17-5 or the end face of the pressure limiting valve piston 17-6 facing the spring 17-5 is to collect the stress of the spring 17-5, when the stress of the spring 17-5 is balanced, the pressure in the balanced gas chamber 20 can be obtained through a stress balance formula, wherein the wellhead connection cylinder 22 is communicated with the high-pressure gas well, so that the pressure in the wellhead connection cylinder 22 is equal to the pressure in the high-pressure gas well, and the pressure in the high-pressure gas well can be obtained through early detection, so that the pressure in the wellhead connection cylinder 22 is a known quantity.
The automatic monitoring method for the accumulated liquid level of the high-pressure gas well shaft shown in fig. 3 comprises the following steps:
step one, installing an automatic monitoring device, wherein the process is as follows:
step 101, mounting an explosion-proof monitoring executing mechanism: a first flange plate is arranged on the end face of a wellhead connecting cylinder 22, the wellhead connecting cylinder 22 is fixedly connected with a second flange plate of the high-pressure gas wellhead through the first flange plate, a seal ring 23 is arranged between the first flange plate and the second flange plate, one end of a tail gas connecting pipe 2 is communicated with a gas outlet channel 17-3, the other end of the tail gas connecting pipe 2 is communicated with a production pipeline 4, a tail gas discharge valve 1 is arranged at one end, close to the gas outlet channel 17-3, of the tail gas connecting pipe 2, and a tail gas pressure reducing valve 3 is arranged at one end, close to the production pipeline 4, of the tail gas connecting pipe 2;
step 102, communication of an explosion-proof monitoring executing mechanism: a communication interface 30 is arranged on the explosion-proof shell 31, and an external computer is connected with the communication module through the communication interface 30;
step 103, power supply of an explosion-proof monitoring executing mechanism: a power interface 29 is arranged on the explosion-proof shell 31, a solar power generation module is used for supplying power to the explosion-proof monitoring executing mechanism, the output end of the solar power generation module is connected with the power interface 29, and a power supply is provided for the circuit control box 28;
step two, balancing air inlet of an air bin, wherein the process is as follows:
step 201, opening a high-pressure ball valve installed at the wellhead of the high-pressure gas well, and simultaneously opening a high-pressure electromagnetic valve 21 to convey high-pressure gas in the high-pressure gas well to a wellhead connection cylinder 22 and then to a balance gas bin 20;
step 202, collecting the stress state of the spring 17-5 in real time by using a third pressure sensor arranged on the end surface of the back pressure piston 17-4 of the pressure limiting valve facing the spring 17-5 or the end surface of the piston 17-6 of the pressure limiting valve facing the spring 17-5, and when the data collected by the third pressure sensor is zero, according to the formula
Acquiring the pressure P of the gas in the balance gas chamber 20 2 The unit is MPa, the high-pressure electromagnetic valve 21 is closed, the balance air bin 20 finishes air intake, wherein P 1 Is the gas pressure in the wellhead connection cylinder 22 and P 1 >P 2 The unit is MPa, S 1 The cross-sectional area of the back pressure piston 17-4 of the pressure limiting valve is expressed as m 2 ，S 2 Is the end surface cross section area of the pressure limiting valve piston 17-6 far away from the end of the spring 17-5 and S 2 >S 1 In m 2 ；
Step three, generating airflow explosion and recovering tail gas: the microcontroller controls the high-pressure electromagnetic valve 21 to be opened, high-pressure gas in the wellhead connecting cylinder 22 is instantaneously released into the balance gas bin 20, the high-pressure electromagnetic valve 21 is closed, and as the pressure in the balance gas bin 20 is lower than the pressure in the wellhead connecting cylinder 22, the air pressure difference forms instantaneous air flow explosion at the moment to generate sound waves, the sound waves propagate deep in a shaft, meanwhile, the high-pressure gas released into the balance gas bin 20 extrudes the pressure limiting valve piston 17-6, the pressure limiting valve piston 17-6 extrudes the spring 17-5 to compress, the high-pressure gas released into the balance gas bin 20 is discharged from the air outlet channel 17-3 to the tail gas connecting pipe 2 through the air cylinder 17-8, and the high-pressure gas is recycled into the production pipeline 4 after being decompressed by the tail gas decompression valve 3;
step four, monitoring the accumulated liquid level of the high-pressure gas well shaft: the sound wave collector 18 receives reflected waves reflected by the liquid level of the well bore and transmits the received data to the microcontroller, and the microcontroller calculates the depth of the liquid level of the well bore by utilizing the time difference;
step five, repeating the steps three to four for a plurality of times, so that the accumulated liquid level of the high-pressure gas well shaft can be monitored for a plurality of times;
step six, pressure relief and disassembly of the explosion-proof monitoring executing mechanism: the method comprises the steps of presetting a safety pressure threshold of a first pressure sensor 15 and a second pressure sensor 19, closing a high-pressure ball valve at the wellhead of a high-pressure gas well, detaching a tail gas connecting pipe 2 from an air outlet channel 17-3, opening a high-pressure electromagnetic valve 21, discharging high-pressure gas in a wellhead connecting cylinder 22 and a balance gas bin 20 from the air outlet channel 17-3, collecting the pressure in the wellhead connecting cylinder 22 in real time by using the first pressure sensor 15 arranged on the wellhead connecting cylinder 22, collecting the pressure in the balance gas bin 20 in real time by using the second pressure sensor 19 arranged on the balance gas bin 20, and realizing the pressure relief of the wellhead connecting cylinder 22 and the balance gas bin 20 when the pressure data collected by the first pressure sensor 15 and the second pressure sensor 19 are not more than the safety pressure threshold, thereby realizing the pressure relief of an explosion-proof monitoring executing mechanism; the explosion proof monitoring actuator is then removed from the high pressure gas well wellhead.
When the automatic monitoring device is used, a high-pressure gas well is used for providing a high-pressure gas source for the balance gas bin 20 and the wellhead connecting cylinder 22, continuous automatic monitoring of the accumulated liquid level of a shaft without human intervention is met, the pressure balance of the spring 17-5 is used for guaranteeing that the pressure in the balance gas bin 20 is smaller than the pressure in the wellhead connecting cylinder 22, the high-pressure solenoid valve 21 is controlled to be rapidly opened and closed, multiple blasting is realized, a plurality of pieces of accumulated liquid level monitoring data of the shaft are obtained, redundant high-pressure gas in the balance gas bin after each blasting is discharged into the tail gas connecting pipe 2 through the pressure limiting valve 17, the high-pressure gas is recovered into the production pipeline 4 for continuous use after being depressurized by the tail gas depressurizing valve 3, the energy is saved, the emission is reduced, the pressure in the wellhead connecting cylinder 22 can be detected by the first pressure sensor 15, the pressure in the balance gas bin 20 can be detected by the second pressure sensor 19, the explosion-proof monitoring executing mechanism is prevented from being dismounted under the pressure, the personal safety of operators is guaranteed, the continuous and automatic monitoring of the accumulated liquid level of the shaft without human intervention is realized under the high-pressure and corrosive gas environment, the operation cost is greatly reduced, and the operation efficiency and the safety is improved.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (6)
1. The method for automatically monitoring the accumulated liquid level of the high-pressure gas well shaft by utilizing the automatic high-pressure gas well shaft accumulated liquid level monitoring device is characterized by comprising the following steps of: the automatic monitoring device for the accumulated liquid level of the high-pressure gas well shaft comprises an explosion-proof monitoring executing mechanism arranged at the well head of the high-pressure gas well and a tail gas discharging mechanism connected with the explosion-proof monitoring executing mechanism and used for discharging tail gas to a production pipeline (4); the anti-explosion monitoring executing mechanism comprises an anti-explosion shell (31), and a balance air bin (20) and a circuit control box (28) which are arranged in the anti-explosion shell (31), wherein a high-pressure electromagnetic valve (21) is arranged at the air inlet end of the balance air bin (20), a pressure limiting valve (17) is arranged at the air outlet end of the balance air bin (20), a wellhead connecting cylinder (22) penetrates through the anti-explosion shell (31) to divide the anti-explosion shell into two paths, one path is communicated with the high-pressure electromagnetic valve (21), and the other path is communicated with the pressure limiting valve (17) through a pressure limiting valve back pressure pipe (16); an acoustic wave collector (18) is arranged in a wellhead connecting cylinder (22), a pressure limiting valve (17) comprises a valve body (17-7) and a cylinder (17-8) arranged in the valve body (17-7), a back pressure channel (17-9) is formed at one end of the cylinder (17-8), an air inlet channel (17-2) is formed at the other end of the cylinder (17-8), the cross section area of the air inlet channel (17-2) is smaller than the cross section area of the cylinder (17-8), the cross section area of the air inlet channel (17-2) is larger than the cross section area of a back pressure channel (17-9), a pressure limiting valve piston (17-6) penetrates through the cylinder (17-8) to extend into the back pressure channel (17-9), a pressure limiting valve back pressure piston (17-4) is arranged in the back pressure channel (17-9), the pressure limiting valve back pressure piston (17-4) is connected with the pressure limiting valve piston (17-6) through a spring (17-5), a back pressure through hole (17-1) is formed at one end of the back pressure channel (17-9) far away from the cylinder (17-8), the cross section area of the back pressure channel (17-1) is smaller than the back pressure channel (17-9) of the back pressure channel (17-8), the back pressure cross section area of the back pressure channel (17-3) is formed on the back pressure channel (17-3), the back pressure pipe (16) of the pressure limiting valve is communicated with the back pressure through hole (17-1), and the air outlet end of the balance air bin (20) is communicated with the air inlet channel (17-2);
the tail gas emission mechanism comprises a tail gas connecting pipe (2) communicated with the gas outlet channel (17-3) and the production pipeline (4), a tail gas discharge valve (1) is arranged at one end, close to the gas outlet channel (17-3), of the tail gas connecting pipe (2), and a tail gas pressure reducing valve (3) is arranged at one end, close to the production pipeline (4), of the tail gas connecting pipe (2);
a first pressure sensor (15) is arranged on the wellhead connecting cylinder (22), a second pressure sensor (19) is arranged on the balance gas bin (20), a microcontroller and a communication module connected with the microcontroller are arranged in the circuit control box (28), and the first pressure sensor (15), the second pressure sensor (19), the sound wave collector (18) and the high-pressure electromagnetic valve (21) are all connected with the microcontroller;
the method comprises the following steps:
step one, installing an automatic monitoring device, wherein the process is as follows:
step 101, mounting an explosion-proof monitoring executing mechanism: a first flange plate is arranged on the end face of a wellhead connecting cylinder (22), the wellhead connecting cylinder (22) is fixedly connected with a second flange plate of the wellhead of the high-pressure gas well through the first flange plate, a seal ring (23) is arranged between the first flange plate and the second flange plate, one end of a tail gas connecting pipe (2) is communicated with a gas outlet channel (17-3), the other end of the tail gas connecting pipe (2) is communicated with a production pipeline (4), a tail gas discharge valve (1) is arranged at one end, close to the gas outlet channel (17-3), of the tail gas connecting pipe (2), and a tail gas pressure reducing valve (3) is arranged at one end, close to the production pipeline (4), of the tail gas connecting pipe (2);
step 102, communication of an explosion-proof monitoring executing mechanism: a communication interface (30) is arranged on the explosion-proof shell (31), and an external computer is connected with the communication module through the communication interface (30);
step 103, power supply of an explosion-proof monitoring executing mechanism: a power interface (29) is arranged on the explosion-proof shell (31), a solar power generation module is used for supplying power to the explosion-proof monitoring executing mechanism, the output end of the solar power generation module is connected with the power interface (29), and a power supply is provided for the circuit control box (28);
step two, balancing air inlet of an air bin, wherein the process is as follows:
step 201, opening a high-pressure ball valve arranged at the wellhead of the high-pressure gas well, simultaneously opening a high-pressure electromagnetic valve (21), and conveying high-pressure gas in the high-pressure gas well to a wellhead connecting cylinder (22) and then to a balance gas bin (20);
step 202, collecting the stress state of the spring (17-5) in real time by using a third pressure sensor arranged on the end face of the back pressure piston (17-4) of the pressure limiting valve facing the spring (17-5) or the end face of the pressure limiting valve piston (17-6) facing the spring (17-5), and when the data collected by the third pressure sensor is zero, collecting the stress state according to the formula
Acquiring the pressure P of the gas in the balance gas bin (20) 2 The unit is MPa, a high-pressure electromagnetic valve (21) is closed, and the balance air bin (20) finishes air intake, wherein P 1 Is the pressure of gas in the wellhead connection cylinder (22) and P 1 ＞P 2 The unit is MPa, S 1 The cross-sectional area of the back pressure piston (17-4) of the pressure limiting valve is expressed as m 2 ，S 2 Is the end surface cross section area of one end of the pressure limiting valve piston (17-6) far away from the spring (17-5) and S 2 ＞S 1 In m 2 ；
Step three, generating airflow explosion and recovering tail gas: the microcontroller controls the high-pressure electromagnetic valve (21) to be opened, the high-pressure gas in the wellhead connecting cylinder (22) is instantaneously released into the balance gas bin (20), the high-pressure electromagnetic valve (21) is closed, the air pressure difference forms instantaneous air current explosion at the moment because the air pressure in the balance gas bin (20) is lower than the air pressure in the wellhead connecting cylinder (22), sound waves are generated and propagate to the deep of a shaft, meanwhile, the high-pressure gas released into the balance gas bin (20) presses the pressure limiting valve piston (17-6), the pressure limiting valve piston (17-6) presses the spring (17-5) to compress, the high-pressure gas released into the balance gas bin (20) is discharged from the air outlet channel (17-3) to the tail gas connecting pipe (2) through the air cylinder (17-8), and the high-pressure gas is decompressed through the tail gas pressure reducing valve (3) and then is recycled into the production pipeline (4);
step four, monitoring the accumulated liquid level of the high-pressure gas well shaft: the sound wave collector (18) receives reflected waves reflected by the liquid level of the well bore, transmits the received data to the microcontroller, and the microcontroller calculates the depth of the liquid level of the well bore by utilizing the time difference;
step five, repeating the steps three to four for a plurality of times, so that the accumulated liquid level of the high-pressure gas well shaft can be monitored for a plurality of times;
step six, pressure relief and disassembly of the explosion-proof monitoring executing mechanism: a safety pressure threshold value of a first pressure sensor (15) and a second pressure sensor (19) is preset, a high-pressure ball valve at the high-pressure gas well barrel opening is closed, a tail gas connecting pipe (2) is detached from an air outlet channel (17-3), a high-pressure electromagnetic valve (21) is opened, high-pressure gas in a well mouth connecting barrel (22) and a balance gas cabin (20) is discharged from the air outlet channel (17-3), the pressure in the well mouth connecting barrel (22) is collected in real time by using the first pressure sensor (15) arranged on the well mouth connecting barrel (22), meanwhile, the pressure in the balance gas cabin (20) is collected in real time by using the second pressure sensor (19) arranged on the balance gas cabin (20), and when pressure data collected by the first pressure sensor (15) and the second pressure sensor (19) are not more than the safety pressure threshold value, pressure relief of the well mouth connecting barrel (22) and the balance gas cabin (20) is realized, and pressure relief of an explosion-proof monitoring executing mechanism is further realized; the explosion proof monitoring actuator is then removed from the high pressure gas well wellhead.
2. The method for automatically monitoring the fluid level of a wellbore in a high pressure gas well of claim 1, wherein: the tail gas exhaust valve (1) is a one-way valve.
3. The method for automatically monitoring the fluid level of a wellbore in a high pressure gas well of claim 1, wherein: the sound wave collector (18) is a microphone.
4. The method for automatically monitoring the fluid level of a wellbore in a high pressure gas well of claim 1, wherein: a power interface (29) and a communication interface (30) are arranged on the explosion-proof shell (31), the output end of the solar power generation module supplies power for the circuit control box (28) through the power interface (29), and an external computer is connected with the communication module through the communication interface (30).
5. The method for automatically monitoring the fluid level of a wellbore in a high pressure gas well of claim 1, wherein: the wellhead connection cylinder (22) is fixedly connected with a second flange plate of the wellhead of the high-pressure gas well through a first flange plate, and the first flange plate and the second flange plate are sealed through a sealing ring (23).
6. The method for automatically monitoring the fluid level of a wellbore in a high pressure gas well of claim 1, wherein: a third pressure sensor is arranged on the end face of the pressure limiting valve back pressure piston (17-4) facing the spring (17-5) or on the end face of the pressure limiting valve piston (17-6) facing the spring (17-5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810836603.3A CN108678729B (en) | 2018-07-26 | 2018-07-26 | Automatic monitoring device and method for accumulated liquid level of high-pressure gas well shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810836603.3A CN108678729B (en) | 2018-07-26 | 2018-07-26 | Automatic monitoring device and method for accumulated liquid level of high-pressure gas well shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108678729A CN108678729A (en) | 2018-10-19 |
| CN108678729B true CN108678729B (en) | 2023-07-04 |
Family
ID=63815721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810836603.3A Active CN108678729B (en) | 2018-07-26 | 2018-07-26 | Automatic monitoring device and method for accumulated liquid level of high-pressure gas well shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108678729B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617056B (en) * | 2019-11-07 | 2024-03-26 | 贵州航天凯山石油仪器有限公司 | Firing method and device for testing liquid level of high-pressure oil-gas well |
| CN111577253B (en) * | 2020-05-25 | 2023-05-12 | 陈明 | Safe and environment-friendly unconventional gas well effusion testing device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840181A (en) * | 2016-03-30 | 2016-08-10 | 中国石油天然气股份有限公司 | High pressure gas well liquid level automatic monitor |
| CN205977201U (en) * | 2016-07-18 | 2017-02-22 | 西安思坦仪器股份有限公司 | Natural gas well is from dynamic fluid level tester |
| CN106768157A (en) * | 2016-12-27 | 2017-05-31 | 中国石油天然气集团公司 | A kind of pressure acquisition device, hydrodynamic gauge and method |
| CN106837306A (en) * | 2017-04-14 | 2017-06-13 | 西安海联石化科技有限公司 | Integrated oil well performance liquid surface measuring device and method |
| CN107218030A (en) * | 2017-07-20 | 2017-09-29 | 荆州市明德科技有限公司 | A kind of adaptive underground hydrodynamic face real-time monitoring device |
-
2018
- 2018-07-26 CN CN201810836603.3A patent/CN108678729B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840181A (en) * | 2016-03-30 | 2016-08-10 | 中国石油天然气股份有限公司 | High pressure gas well liquid level automatic monitor |
| CN205977201U (en) * | 2016-07-18 | 2017-02-22 | 西安思坦仪器股份有限公司 | Natural gas well is from dynamic fluid level tester |
| CN106768157A (en) * | 2016-12-27 | 2017-05-31 | 中国石油天然气集团公司 | A kind of pressure acquisition device, hydrodynamic gauge and method |
| CN106837306A (en) * | 2017-04-14 | 2017-06-13 | 西安海联石化科技有限公司 | Integrated oil well performance liquid surface measuring device and method |
| CN107218030A (en) * | 2017-07-20 | 2017-09-29 | 荆州市明德科技有限公司 | A kind of adaptive underground hydrodynamic face real-time monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108678729A (en) | 2018-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201874559U (en) | Automatic liquid-level monitor for infrasonic-wave non-pressure oil well | |
| CN108678729B (en) | Automatic monitoring device and method for accumulated liquid level of high-pressure gas well shaft | |
| CN204782942U (en) | Screw compression formula oil field gas recovery unit | |
| CN101672748A (en) | 400MPa super-high pressure fatigue test device and test method | |
| CN103717916A (en) | Condensate drain for pressurized gas system | |
| CN208564538U (en) | High-pressure gas well wellbore effusion face automated watch-keeping facility | |
| CN102345592B (en) | Automatic pressing pump test device | |
| CN202215233U (en) | Liquid level automatic monitoring device for low pressure oil wells | |
| CN102477863A (en) | Device for monitoring liquid level of CBM (coal-bed methane) unconfined well | |
| CN107218030A (en) | A kind of adaptive underground hydrodynamic face real-time monitoring device | |
| CN102261242A (en) | Automatic low-pressure oil well liquid level monitoring device | |
| CN202832456U (en) | Pressure reduction and yield increase device for natural gas well mouth | |
| CN202152914U (en) | Natural gas recovery device for oil well | |
| CN210037098U (en) | Liquid-driven oil casing gas-tight seal detection device | |
| CN201678642U (en) | Graded pressure charging and discharging device for pressing gasification furnace coal lock | |
| CN210440012U (en) | Continuous gas production supercharger | |
| CN204165838U (en) | A kind of hydraulic pressure demolition device | |
| CN201924917U (en) | Liquid level measuring device of coalbed gas non-pressure well | |
| CN111042775B (en) | Device for increasing yield of ultrasonic waves and performing atomization extraction under coal-bed gas well | |
| CN211201925U (en) | Sewage discharging device for low-pressure liquid in natural gas inlet-gas separator | |
| CN203803248U (en) | Filter sweeping device of gas pressure regulating station | |
| CN210141986U (en) | Portable transformer pressure relief valve field calibration system | |
| CN101781580A (en) | Grading pressurization and depressurization method of pressure gasification furnace coal lock | |
| CN106190330A (en) | The fine coal pressure-flow system of a kind of coal-fired gasification air flow bed and method | |
| CN208118194U (en) | A kind of ultra-high pressure water fluid jet power device for waste tire processing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |