CN212376650U - Automatic liquid level monitor for drilling and repairing well - Google Patents
Automatic liquid level monitor for drilling and repairing well Download PDFInfo
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- CN212376650U CN212376650U CN202020860810.5U CN202020860810U CN212376650U CN 212376650 U CN212376650 U CN 212376650U CN 202020860810 U CN202020860810 U CN 202020860810U CN 212376650 U CN212376650 U CN 212376650U
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Abstract
The utility model belongs to the electric control equipment field of drilling and workover, especially, relate to an automatic liquid level monitor of drilling and workover, including well head connector, explosion-proof control box, buffer tank and nitrogen cylinder, the buffer tank include jar body and movable mounting piston in jar, the piston has divided into two independent cavities with the buffer tank, the one end of the jar body is equipped with jar intake pipe and jar outlet duct, the other end of the jar body is equipped with the relief valve of outside pressure release of jar and the check valve of admitting air to the jar, jar intake pipe be linked together with the nitrogen cylinder, jar outlet duct be connected with the surge damping valve, be provided with pressure sensor between the two, the surge damping valve is connected with the solenoid valve, the check valve be connected with the air pump. The utility model provides a buffer tank among the automatic liquid level monitor of current drilling and workover can only carry out the pressure buffering, problem that can not steady output, steady atmospheric pressure output has produced the relatively more stable sound wave parameter, is favorable to promoting the accuracy of liquid level test.
Description
Technical Field
The utility model belongs to bore well workover electrical control equipment field, especially, relate to a bore automatic liquid level monitor of well workover.
Background
In the process of drilling and repairing wells in oil fields, a liquid level measuring device is needed to be used for dynamically monitoring the liquid level in the wells, and the monitoring principle is as follows: at present, most of existing sound generators are mechanical generators, an air source with air pressure not less than 2.0MPa is used as a driving air source to enable the sound generator to produce sound, bottled nitrogen is usually selected for selection of the air source, compressed air is not selected as the driving air source, water exists because of high dew point of the compressed air, and the normal action of a valve is influenced because the cylinder is frozen due to the fact that the dew point is too high to process in winter. And the nitrogen has low dew point, is clean and dry, does not influence the valve action in winter, is inert gas and is safer to use in a well site. The pressure of the nitrogen cylinder is usually 12.0MPa, and the pressure can be gradually reduced along with continuous gas supply, so that the output pressure of a gas source in the whole gas supply process is not stable enough, and the sound wave parameters generated by a sound wave generator are not stable enough.
SUMMERY OF THE UTILITY MODEL
For solving the problem in the background art, the utility model provides an automatic liquid level monitor bores and repairs well, the utility model discloses possess characteristics.
The utility model provides a technical scheme is: an automatic liquid level monitor for drilling and workover wells comprises a well head connector, an explosion-proof control box, a buffer tank and a nitrogen cylinder, wherein a sound sensor is arranged on the well head connector, a sound generator and an electromagnetic valve are arranged in the explosion-proof control box, gas in the nitrogen cylinder is guided by a pipeline and then is transmitted to the underground through the buffer tank, the electromagnetic valve, the sound generator and the well head connector in sequence, the outlet end and the inlet end of the sound generator are respectively provided with a pressure sensor, the explosion-proof control box is internally provided with an RTU (remote terminal unit) controller, an industrial personal computer, a WIFI (wireless fidelity) module and a storage battery for supplying power to the automatic liquid level monitor for drilling and workover wells, the WIFI module is connected to the industrial personal computer, an antenna is arranged outside the explosion-proof control box, the antenna is connected to the WIFI module, the buffer tank comprises a tank body and a piston movably arranged in the tank, the buffer tank is divided into two independent chambers by the piston, a tank air inlet pipe and a tank air outlet pipe are arranged at one end of the tank body, a pressure release valve for releasing pressure outside the tank and a one-way valve for introducing air into the tank are arranged at the other end of the tank body, the tank air inlet pipe is communicated with the nitrogen gas cylinder, the tank air outlet pipe is connected with a pressure stabilizing valve, a pressure sensor is arranged between the pressure release valve and the pressure stabilizing valve, the pressure sensor is in communication connection with the RTU controller, the pressure stabilizing valve is connected with the electromagnetic valve, the one-way valve is connected with an air pump, and the air; pressure stabilizing valve include valve body, valve plug, valve gap and spring, the valve gap connect the one end at the valve body soon, the valve gap encapsulates spring and valve plug in the valve body, the spring be located between valve gap and the valve plug, the valve plug has the trend of keeping away from the valve gap under the spring action, the other end of valve body is provided with the valve intake pipe with valve inner chamber intercommunication, the valve intake pipe is linked together through the jar outlet duct of pipeline and buffer tank, the valve plug include solid chock plug A and hollow chock plug B, the two fixed connection and remain fixed interval throughout to make pressure stabilizing valve have two limits and supply the pressure value, under the spring does not atress state, the valve body lateral wall that the spring section corresponds is opened there is the valve outlet duct.
The inner wall of the buffer tank is sprayed with an anticorrosive coating, the outer side of the explosion-proof control box is also provided with a four-in-one gas detector, a data interface on the four-in-one gas detector is connected with the industrial control host through a data line, the minimum pressure supply value of the pressure stabilizing valve is not less than 2MPa, and the difference between the maximum pressure supply value and the minimum pressure supply value is not more than 1 MPa.
The utility model has the advantages that:
1. the invention is a new generation intelligent and automatic drilling test device which is independently researched and developed according to the actual requirements of field work, has the characteristics of comprehensive functions, simple structure and convenient installation, can monitor the liquid level in the well in real time in the well repairing process, and can move and install quickly and efficiently.
2. The invention improves the existing buffer tank, buffers higher pressure of the nitrogen cylinder by the principle of air pressure balance in the cavity, and sets the pressure stabilizing valve at the output end for stabilizing pressure, so that the pressure output is controlled in a certain interval, the influence of pressure fluctuation on sound wave parameters generated by the sound wave generator is effectively reduced, the stability of the sound wave is improved, and the accuracy of liquid level monitoring is further greatly improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic structural view of the buffer tank and the nitrogen cylinder of the present invention.
Fig. 3 is a schematic structural diagram of the pressure stabilizing valve of the present invention.
In the figure: 1-well head connector, 2-explosion-proof control box, 3-buffer tank, 4-nitrogen cylinder, 5-sound sensor, 6-sound wave generator, 7-electromagnetic valve, 8-pressure sensor, 9-antenna, 10-tank body, 11-piston, 12-tank air inlet pipe, 13-tank air outlet pipe, 14-pressure release valve, 15-one-way valve, 16-pressure stabilizing valve, 17-air pump, 18-valve cover, 19-spring, 20-valve body, 21-plug A, 22-plug B, 23-valve air outlet pipe, 24-valve air inlet pipe, 25-four-in-one gas detector, 26-nitrogen chamber and 27-air chamber.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail.
The embodiment provides an automatic liquid level monitor for drilling and workover, which comprises a well head connector 1, an explosion-proof control box 2, a buffer tank 3 and a nitrogen gas bottle 4, wherein a sound sensor 5 is arranged on the well head connector 1, a sound wave generator 6 and an electromagnetic valve 7 are arranged in the explosion-proof control box 2, the gas in the nitrogen gas bottle 4 is guided by a pipeline and then transmitted to the underground through the buffer tank 3, the electromagnetic valve 7, the sound wave generator 6 and the well head connector 1 in sequence, the outlet end of the sound wave generator 6 and the inlet end of the electromagnetic valve 7 are respectively provided with a pressure sensor 8, the explosion-proof control box 2 is also internally provided with an RTU controller, an industrial control host, a WIFI module and a storage battery for supplying power to the automatic liquid level monitor for drilling and workover, the WIFI module is connected on the industrial control host, an antenna 9 is arranged outside the explosion-proof control box 2, the antenna 9 is connected to the WIFI module. The above is a technical solution existing in the prior art, and is not described again.
The utility model discloses an innovation point lies in: the buffer tank 3 comprises a tank body 10 and a piston 11 movably mounted in the tank, the buffer tank 3 is divided into two independent chambers by the piston 11, the two independent chambers are named as a nitrogen chamber 26 and an air chamber 27 respectively according to different stored gases, when the air pressure in the two chambers is unbalanced, one chamber with larger air pressure can push the piston 11 to slide to the chamber with smaller air pressure, and finally, the air pressure in the two chambers is balanced.
Jar one end of the body 10 is equipped with jar intake pipe 12 and jar outlet duct 13, jar intake pipe 12 and jar outlet duct 13 all are linked together with nitrogen gas chamber 26, the other end of jar body 10 is equipped with the relief valve 14 of outside jar pressure release and the check valve 15 of admitting air in to the jar, relief valve 14 and check valve 15 all are linked together with air chamber 27, in this embodiment, the pressure release value of relief valve 14 is 2.1MPa, piston 11 is located jar one side under the initial condition, the volume of nitrogen gas chamber 26 is nearly zero this moment, jar intake pipe 12 be linked together with nitrogen cylinder 4, nitrogen gas in the nitrogen cylinder 4 enters into the nearly nitrogen gas chamber 26 that is zero of volume through the pipeline, that is to say before nitrogen gas gets into this cavity, this cavity does not have the air of persisting, this more is favorable to guaranteeing the purity of nitrogen gas. After the nitrogen cylinder 4 is opened, the air pressure in the nitrogen air cavity 26 is increased, according to the principle of air pressure balance, the piston 11 is pushed to the air cavity 27 with smaller air pressure, the air cavity 27 is compressed, the air pressure is increased, when the air pressure is higher than 2.1MPa, the pressure release valve 14 is pushed open, the pressure of the air cavity 27 is released, and the air pressure of the air cavity 27 in the buffering process is always kept to be not lower than 2.1 MPa.
The gas outlet pipe 13 of the tank is connected with a pressure stabilizing valve 16, in the embodiment, two extreme pressure values of the pressure stabilizing valve 16 are respectively 2.1MPa and 3.0MPa, the pressure stabilizing valve 16 is in an open state only when the pressure is within the range of 2.1MPa to 3.0MPa, and the pressure stabilizing valve 16 is in a closed state when the pressure is higher than 3.0MPa or the pressure is lower than 2.1MPa, so that the pressure supplied to the sound wave generator 6 by the pressure stabilizing valve 16 is ensured to be within a stable and controllable range, the influence of pressure fluctuation on sound wave parameters generated by the sound wave generator 6 is effectively reduced, the stability of sound waves is improved, and the accuracy of liquid level monitoring is greatly improved.
A pressure sensor 8 is arranged between the tank air outlet pipe 13 and the pressure stabilizing valve 16, the pressure sensor 8 is in communication connection with the RTU controller, the one-way valve 15 is connected with an air pump 17, the air pump 17 is controlled by the industrial personal computer, in the later stage of gas supply of the nitrogen gas bottle 4, the gas pressure in the bottle is gradually reduced, along with the continuous output of the gas source, the pressure in the nitrogen gas cavity 26 is also gradually reduced, when the pressure sensor 8 detects that the pressure is less than 2.15MPa, a signal is transmitted to the RTU controller, the automatic control executive component, namely the air pump 17 starts to work, the air pump 17 inputs air with the air pressure higher than 2.15MPa to the air cavity 27 through the one-way valve 15, at the moment, the piston 11 slides reversely to extrude the nitrogen cavity 26 and increase the air pressure of the nitrogen cavity 26, the pressure is maintained between two extreme values of the pressure stabilizing valve 16, the pressure stabilizing valve 16 is ensured to be in an open state all the time, and the buffer tank 3 is ensured to continuously supply air to the sound wave generator 6 through the electromagnetic valve 7. When the nitrogen gas bottle 4 is exhausted, the piston 11 returns to the initial state again, the volume of the nitrogen gas cavity 26 returns to zero, and when the next nitrogen gas bottle 4 is connected, no air is left in the nitrogen gas cavity 26, and the purity of the nitrogen gas is ensured.
The pressure maintaining valve 16 comprises a valve body 20, a valve plug, a valve cover 18 and a spring 19, the valve cover 18 is screwed at one end of the valve body 20, the spring 19 and the valve plug are packaged in the valve body 20 by the valve cover 18, the spring 19 is positioned between the valve cover 18 and the valve plug, the valve plug has a trend of being far away from the valve cover 18 under the elastic force action of the spring 19, the other end of the valve body 20 is provided with a valve inlet pipe 24 communicated with the inner cavity of the valve, the valve inlet pipe 24 is communicated with the tank outlet pipe 13 of the buffer tank 3 through a pipeline, the valve plug comprises a solid plug head A21 and a hollow plug head B22, the two plug heads can slide in the inner cavity of the valve body 20, and is sealed with the inner cavity of the valve body 20 in a circumferential direction, and the two are fixedly connected and always keep a fixed distance, so that the pressure stabilizing valve 16 has two limit pressure supply values, and under the state that the spring 19 is not stressed, the valve outlet pipe 23 is arranged on the side wall of the valve body 20 corresponding to the section of the spring 19. The plug A21 starts to compress the spring 19 after being pushed by the air pressure from the nitrogen chamber 26 of the buffer tank 3, when the air pressure reaches 2.1MPa, the plug A21 crosses the valve outlet pipe 23, the valve outlet pipe 23 and the nitrogen chamber 26 are communicated at the moment, when the air pressure of the nitrogen chamber 26 continuously rises to exceed 3.0MPa, the plug B22 is pushed to reach the position of the valve outlet pipe 23, the valve outlet pipe 23 is sealed, the communication between the valve outlet pipe 23 and the nitrogen chamber 26 is segmented at the moment, so the maximum pressure supply value of the pressure maintaining valve 16 is 3.0MPa and the minimum pressure supply value is 2.1MPa, and the pressure maintaining valve 16 is in an open state only when the air pressure is in the interval.
In order to further improve the corrosion resistance of the buffer tank 3, an anticorrosive coating is sprayed on the inner wall of the buffer tank 3.
The outside of explosion-proof control box 2 still be provided with four unification gas detection appearance 25, data interface on the four unification gas detection appearance 25 pass through the data line with industrial control host computer connect, can report to the police when harmful gas reveals through four unification gas detection appearance 25, guarantee production safety.
The pressure of the driving air source is required to be not lower than 2.0MPa by the sound wave generator 6, so the minimum pressure supply value of the pressure stabilizing valve 16 is not less than 2.0MPa, and the difference between the maximum pressure supply value and the minimum pressure supply value is not more than 1MPa in order to ensure that the output air source is as stable as possible.
Claims (4)
1. The utility model provides an automatic liquid level monitor of well drilling and workover, includes well head connector (1), explosion-proof control box (2), buffer tank (3) and nitrogen cylinder (4), well head connector (1) on be provided with sound sensor (5), explosion-proof control box (2) in be provided with sound generator (6) and solenoid valve (7), the gas in nitrogen cylinder (4) is in proper order under the guide of pipeline via buffer tank (3), solenoid valve (7), sound generator (6), well head connector (1) back transmission to downhole, exit end and solenoid valve (7) entry end of sound generator (6) respectively be provided with a pressure sensor (8), explosion-proof control box (2) in still be provided with be used for right sound sensor (5) and pressure sensor (8) carry out RTU controller, industrial control host computer, the RTU of controlling, The WIFI module to and be used for doing the battery of the automatic liquid level monitor power supply of drilling and workover, the WIFI module is connected on the industrial control host computer, and the outside of explosion-proof control box (2) is provided with antenna (9), and antenna (9) are connected on the WIFI module, its characterized in that: the buffer tank (3) comprises a tank body (10) and a piston (11) movably mounted in the tank, the buffer tank (3) is divided into two independent chambers by the piston (11), a tank air inlet pipe (12) and a tank air outlet pipe (13) are arranged at one end of the tank body (10), a pressure release valve (14) for releasing pressure outside the tank and a one-way valve (15) for admitting air into the tank are arranged at the other end of the tank body (10), the tank air inlet pipe (12) is communicated with a nitrogen gas bottle (4), a pressure stabilizing valve (16) is connected with the tank air outlet pipe (13), a pressure sensor (8) is arranged between the tank air inlet pipe and the pressure stabilizing valve, the pressure sensor (8) is in communication connection with the RTU controller, the pressure stabilizing valve (16) is connected with an electromagnetic valve (7), the one-way valve (15) is connected with an air pump (17), and the;
the pressure stabilizing valve (16) comprises a valve body (20), a valve plug, a valve cover (18) and a spring (19), the valve cover (18) is screwed at one end of the valve body (20), the spring (19) and the valve plug are packaged in the valve body (20) by the valve cover (18), the spring (19) is positioned between the valve cover (18) and the valve plug, the valve plug has a trend of being far away from the valve cover (18) under the elastic force action of the spring (19), the other end of the valve body (20) is provided with a valve air inlet pipe (24) communicated with an inner cavity of the valve, the valve air inlet pipe (24) is communicated with a tank air outlet pipe (13) of the buffer tank (3) through a pipeline, the valve plug comprises a solid plug head A (21) and a hollow plug head B (22) which are fixedly connected and always keep a fixed interval, so that the pressure stabilizing valve (16) has two limit pressure supply values, and the spring (19), a valve outlet pipe (23) is arranged on the side wall of the valve body (20) corresponding to the spring (19) section.
2. The automatic liquid level monitor for well drilling and repairing according to claim 1, wherein: the inner wall of the buffer tank (3) is sprayed with an anticorrosive coating.
3. The automatic liquid level monitor for well drilling and repairing according to claim 1, wherein: the outer side of the explosion-proof control box (2) is also provided with a four-in-one gas detector (25), and a data interface on the four-in-one gas detector (25) is connected with the industrial control host through a data line.
4. The automatic liquid level monitor for well drilling and repairing according to claim 1, wherein: the minimum pressure supply value of the pressure stabilizing valve (16) is not less than 2MPa, and the difference between the maximum pressure supply value and the minimum pressure supply value is not more than 1 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020860810.5U CN212376650U (en) | 2020-05-21 | 2020-05-21 | Automatic liquid level monitor for drilling and repairing well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020860810.5U CN212376650U (en) | 2020-05-21 | 2020-05-21 | Automatic liquid level monitor for drilling and repairing well |
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| CN212376650U true CN212376650U (en) | 2021-01-19 |
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| CN202020860810.5U Active CN212376650U (en) | 2020-05-21 | 2020-05-21 | Automatic liquid level monitor for drilling and repairing well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719274A (en) * | 2021-09-09 | 2021-11-30 | 西南石油大学 | Novel downhole dynamic liquid level automatic monitoring system and monitoring method for well drilling |
| CN115366776A (en) * | 2022-09-06 | 2022-11-22 | 中国石油化工股份有限公司 | Pressure relief device of road tank truck loading facility and use method thereof |
-
2020
- 2020-05-21 CN CN202020860810.5U patent/CN212376650U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719274A (en) * | 2021-09-09 | 2021-11-30 | 西南石油大学 | Novel downhole dynamic liquid level automatic monitoring system and monitoring method for well drilling |
| CN113719274B (en) * | 2021-09-09 | 2023-08-22 | 西南石油大学 | Automatic monitoring system and monitoring method for underground working fluid level for well drilling |
| CN115366776A (en) * | 2022-09-06 | 2022-11-22 | 中国石油化工股份有限公司 | Pressure relief device of road tank truck loading facility and use method thereof |
| CN115366776B (en) * | 2022-09-06 | 2023-11-24 | 中国石油化工股份有限公司 | Pressure relief device of road tank truck unloading facility and use method thereof |
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