CN112664157A - Pressure regulation and control device and method for packer - Google Patents
Pressure regulation and control device and method for packer Download PDFInfo
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- CN112664157A CN112664157A CN202011612220.1A CN202011612220A CN112664157A CN 112664157 A CN112664157 A CN 112664157A CN 202011612220 A CN202011612220 A CN 202011612220A CN 112664157 A CN112664157 A CN 112664157A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 160
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 124
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 62
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 238000007599 discharging Methods 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention belongs to the field of drilling tests, and particularly relates to a pressure regulating device and a pressure regulating method for a packer, wherein the device comprises an industrial nitrogen cylinder, a pressure control plate, the packer, a vacuum pump, a pressure gauge a, a pressure-resistant water storage tank and a water tank; wherein, the branch pipe of industry nitrogen cylinder and the branch pipe of vacuum pump meet the back through the access connection of trunk line and withstand voltage water storage tank, and the export of withstand voltage water storage tank passes through the pipeline and is connected with pressure control panel, and industry nitrogen cylinder passes through the pipeline and is connected with pressure control panel, and pressure control panel is connected with packer and water tank respectively again. The invention provides two packer pressurization modes of nitrogen and water and a long-term pressure maintaining function, and has convenient processing and maintenance and strong weather resistance; the pressure relief device is simple, convenient and quick to operate, is suitable for drilling holes with different permeability and underground water levels, and can achieve pressure relief of the packer without injecting water into the drilling holes.
Description
Technical Field
The invention belongs to the field of drilling tests, and particularly relates to a pressure regulating device and method of a packer.
Background
In the fields of shale oil (gas) exploitation, pollution site investigation, radioactive waste disposal warehouse site selection, characteristic evaluation and the like, well washing and backwashing for drilling, hydraulic fracturing tests, drilling hydrogeological tests, underground water layered monitoring and other work which need to be carried out by drilling are necessary to be constructed, and the underground device is necessary for carrying out related work. The common main structure of the packer is a rigid body of an outer sleeve hollow rubber cylinder, and the working principle of the packer is that high-pressure nitrogen or water is injected into the rubber cylinder, so that the rubber cylinder expands and is tightly attached to the wall of a hole, and a plurality of hole sections are sealed and isolated in a drill hole. By means of the height difference between the ground and the packer, the ground applies smaller pressure, the packer rubber cylinder can obtain enough working pressure, and the pressurizing process is safe, convenient and fast.
The packer needs to extrude water in the rubber cylinder to realize pressure relief by means of the pressure difference between water in the drill hole and water in the rubber cylinder, and the shallow underground water level of the drill hole is a necessary condition for pressure relief by water injection plugs. When the groundwater level in the drill hole does not meet the requirement, water needs to be injected into the drill hole, and the groundwater level in the drill hole is artificially raised. The water injection process can affect the water chemical environment of underground water, and the drilling holes with high permeability and low water level require larger water quantity, so that the water injection time is prolonged.
Therefore, it is desirable to provide a pressure regulating device and method for a packer, which reduce the time consumed by pressure relief of the packer, reduce the cost, improve the field work efficiency, and solve the defects of the prior art.
Disclosure of Invention
The invention aims to provide a pressure regulating device and a pressure regulating method of a packer aiming at the defects of the prior art, which can keep the working pressure of the packer for a long time, realize the pressure relief of a water injection plug irrelevant to the water level of underground water in a drill hole and improve the field working efficiency.
The technical scheme of the invention is as follows:
a pressure regulating device of a packer comprises an industrial nitrogen cylinder, a pressure control plate, the packer, a vacuum pump, a pressure gauge a, a pressure-resistant water storage tank and a water tank;
wherein, the branch pipe of industry nitrogen cylinder and the branch pipe of vacuum pump meet the back through the access connection of trunk line and withstand voltage water storage tank, and the export of withstand voltage water storage tank passes through the pipeline and is connected with pressure control panel, and industry nitrogen cylinder passes through the pipeline and is connected with pressure control panel, and pressure control panel is connected with packer and water tank respectively again.
And a valve a is arranged on the branch pipe of the industrial nitrogen cylinder.
And a valve b is arranged on the branch pipe of the vacuum pump.
And a valve c is arranged on the main pipeline after the branch pipe of the industrial nitrogen cylinder and the branch pipe of the vacuum pump are converged.
And a pressure gauge a is arranged on the pressure-resistant water storage tank.
The pressure control plate is provided with two horizontal pipelines and a vertical pipeline in common, the end parts of the two horizontal pipelines are provided with a straight joint a, a straight joint b, a straight joint c and a straight joint d, a high-pressure ball valve a and a high-pressure ball valve b are arranged between the straight joint a and the straight joint c, and a high-pressure ball valve d and a high-pressure ball valve e are arranged between the straight joint b and the straight joint d.
And the straight joint a, the straight joint b, the straight joint c and the straight joint d are respectively connected with the industrial nitrogen cylinder, the pressure-resistant water storage tank, the packer and the water tank.
The top of one vertical pipeline is connected with a pressure gauge b, a high-pressure ball valve c is built in the vertical pipeline, and the bottom of the vertical pipeline is used for controlling the pipeline to release pressure through a high-pressure ball valve f.
The regulation and control method of the pressure regulation and control device of the packer comprises the following steps:
the method comprises the following steps: pressurizing the packer when industrial nitrogen is used;
step two: when industrial nitrogen is used, the packer is decompressed;
step three: injecting water into the pressure-resistant water storage tank;
step four: draining water from the pressure-resistant water storage tank;
step five: and injecting water into the packer for pressurization.
The first step comprises the following steps:
step 1.1, opening a high-pressure ball valve a and a high-pressure ball valve b, and closing all other valves;
step 1.2, opening a switch of an industrial nitrogen cylinder, adjusting output pressure and then conveying industrial nitrogen to a packer;
step 1.3, in the pressurizing process, closing the high-pressure ball valve a, and checking whether the reading of the pressure gauge b is consistent with the set output pressure or not;
step 1.4, if the reading of the pressure gauge b is lower than the set output pressure, opening the high-pressure ball valve a, and continuing to pressurize the packer;
and 1.5, if the reading of the pressure gauge b is lower than the set output pressure and consistent, keeping the high-pressure ball valve a closed, closing the high-pressure ball valve b, opening the high-pressure ball valve f, discharging residual industrial nitrogen in the pipeline of the pressure control plate, and finishing the pressurizing process of the packer.
The second step comprises the following steps:
step 2.1, opening the high-pressure ball valve c and the high-pressure ball valve f, and closing all other valves;
step 2.2, opening the high-pressure ball valve b, and discharging the industrial nitrogen in the packer;
and 2.3, after no air flow exists in an air outlet at the lower part of the high-pressure ball valve f, closing the high-pressure ball valve b, the high-pressure ball valve c and the high-pressure ball valve f, and finishing the pressure relief process of the packer.
The third step comprises the following steps:
step 3.1, the water storage tank is placed at a high position, so that the bottom of the water storage tank is basically at the same height as a valve c at the top of the pressure-resistant water storage tank;
step 3.2, checking all the valves c, turning to a closed state, and filling the water storage tank with clear water;
3.3, opening the high-pressure ball valve e, the high-pressure ball valve d and the valve c in sequence, and injecting water into the pressure-resistant water storage tank;
step 3.4, when no water flows out from the valve c and the water level in the water storage tank does not drop, continuously supplementing water into the water storage tank;
and 3.5, when water flows out of the valve c, filling the pressure-resistant water storage tank with water, closing the valve c and stopping water injection.
The fourth step comprises the following steps:
step 4.1, opening the valve a, the high-pressure ball valve d and the high-pressure ball valve f, wherein other valves are in a closed state;
step 4.2, opening an industrial nitrogen bottle, inputting nitrogen into the pressure-resistant water storage tank, and allowing water in the pressure-resistant water storage tank to flow out through a pressure relief opening at the bottom of the high-pressure ball valve f;
and 4.3, when no water flows out from the pressure relief opening at the bottom of the high-pressure ball valve f, closing the industrial nitrogen cylinder, and finishing the drainage of the pressure-resistant water storage tank.
The fifth step comprises the following steps:
step 5.1, referring to the step three, filling water into the pressure-resistant water storage tank, and closing all valves;
step 5.2, opening a valve a, a high-pressure ball valve b, a high-pressure ball valve c and a high-pressure ball valve d;
step 5.3, opening an industrial nitrogen bottle according to the set output pressure, and injecting high-pressure nitrogen into the pressure-resistant water storage tank;
step 5.4, when the pressure displayed by a pressure gauge a of the pressure-resistant water storage tank reaches the set output pressure, closing the pressure-resistant water storage tank, opening a high-pressure ball valve f, and discharging residual water in a pipeline of the pressure control plate;
and 5.5, when the packer is used for monitoring underground water layering, keeping the industrial nitrogen cylinder, the valve a, the high-pressure ball valve b, the high-pressure ball valve c and the high-pressure ball valve d in an open state for a long time so as to keep the stable working pressure of the packer, and periodically referring to the step of supplementing water into the three-way high-pressure-resistant water storage tank 9.
The invention has the following beneficial effects:
(1) the pressure regulating device of the packer provided by the invention provides two packer pressurization modes of nitrogen and water and a long-term pressure maintaining function, and is convenient to process and maintain and strong in weather resistance;
(2) the pressure regulating device of the packer provided by the invention is simple, convenient and quick to operate, is suitable for drilling holes with different permeability and underground water levels, and can complete pressure relief of the packer without injecting water into the drilling holes.
Drawings
FIG. 1 is a general schematic view of a pressure regulating device of a packer provided in the present invention;
fig. 2 is a schematic view of the connection of the pressure control plate of the pressure control device of the packer provided by the invention.
Wherein: 1-industrial nitrogen cylinder; 2-valve a; 3-a pressure control plate; 4-a packer; 5-a vacuum pump; 6-valve b; 7-valve c; 8-pressure gauge a; 9-pressure-resistant water storage tank; 10-a water tank; 11-terminal through joint a; 12-straight-through joint b; 13-straight-through joint c; 14-straight-through joint d; 15-high pressure ball valve a; 16-high pressure ball valve b; 17-high pressure ball valve c; 18-high pressure ball valve d; 19-high pressure ball valve e; 20-high pressure ball valve f; 21-pressure gauge b.
Detailed Description
The present technology is further described below:
as shown in figure 1, the pressure regulating device of the packer provided by the invention comprises an industrial nitrogen cylinder 1, a pressure control plate 3, a packer 4, a vacuum pump 5, a pressure gauge a8, a pressure-resistant water storage tank 9 and a water tank 10.
Wherein, the branch pipe of industry nitrogen cylinder 1 and the branch pipe of vacuum pump 5 converge the back and pass through the access connection of trunk line and withstand voltage water storage tank 9, and the export of withstand voltage water storage tank 9 passes through the pipeline and is connected with pressure control panel 3, and industry nitrogen cylinder 1 passes through the pipeline and is connected with pressure control panel 3, and pressure control panel 3 is connected with packer 4 and water tank 10 respectively again.
The branch pipe of the industrial nitrogen cylinder 1 is provided with a valve a 2.
The branch pipe of the vacuum pump 5 is provided with a valve b 6.
A valve c7 is arranged on the main pipeline after the branch pipe of the industrial nitrogen cylinder 1 and the branch pipe of the vacuum pump 5 are merged.
The pressure-resistant water storage tank 9 is provided with a pressure gauge a 8.
As shown in fig. 2, the pressure control plate 3 is provided with two horizontal pipelines and a vertical pipeline in common, the end parts of the two horizontal pipelines are provided with a through joint a11, a through joint b12, a through joint c13 and a through joint d14, and a high-pressure ball valve a15 and a high-pressure ball valve b16 are arranged between the through joint a11 and the through joint c 13.
And a high-pressure ball valve d18 and a high-pressure ball valve e19 are arranged between the through joint b12 and the through joint d 14.
The through joint a11, the through joint b12, the through joint c13 and the through joint d14 are respectively connected with the industrial nitrogen cylinder 1, the pressure-resistant water storage tank 9, the packer 4 and the water tank 10;
the top of one vertical pipeline is connected with a pressure gauge b21, a high-pressure ball valve c17 is built in the vertical pipeline, and the bottom of the vertical pipeline is controlled by a high-pressure ball f20 to release pressure;
the functions of industrial nitrogen pressurization, water injection pressurization and drainage pressure relief of the packer are realized by changing the switching states of the high-pressure ball valve a15, the high-pressure ball valve b16, the high-pressure ball valve c17, the high-pressure ball valve d18 and the high-pressure ball valve e 19.
The invention also provides a regulation and control method of the pressure regulation and control device of the packer, which comprises the following steps:
the method comprises the following steps: pressurizing the packer when industrial nitrogen is used;
step 1.1, opening a high-pressure ball valve a15 and a high-pressure ball valve b16, and closing all other valves;
step 1.2, opening a switch of an industrial nitrogen cylinder 1, adjusting output pressure and then conveying industrial nitrogen to a packer 4;
in the pressurizing process of the step 1.3, closing the high-pressure ball valve a15, and checking whether the reading of a pressure gauge b21 is consistent with the set output pressure;
step 1.4, if the reading of a pressure gauge b21 is lower than the set output pressure, opening a high-pressure ball valve a15 and continuing to pressurize the packer 4;
step 1.5, if the reading of the pressure gauge b21 is lower than the set output pressure and is consistent, keeping the high-pressure ball valve a15 closed, closing the high-pressure ball valve b16, opening the high-pressure ball valve f20, discharging residual industrial nitrogen in the pipeline of the pressure control plate 3, and ending the pressurization process of the packer 4.
Step two: when industrial nitrogen is used, the packer is decompressed;
step 2.1, opening the high-pressure ball valve c17 and the high-pressure ball valve f20, and closing all other valves;
step 2.2, opening a high-pressure ball valve b16, and discharging industrial nitrogen in the packer 4;
and 2.3, after no air flow exists in an air outlet at the lower part of the high-pressure ball valve f20, closing the high-pressure ball valve b16, the high-pressure ball valve c17 and the high-pressure ball valve f20, and finishing the pressure relief process of the packer 4.
Step three: injecting water into the pressure-resistant water storage tank;
step 3.1, the water storage tank 10 is placed at a high position, so that the bottom of the water storage tank is basically at the same height as a valve c7 at the top of the pressure-resistant water storage tank 9;
step 3.2, checking all the valves c7, turning to a closed state, and filling the water storage tank 10 with clear water;
3.3, opening the high-pressure ball valve e19, the high-pressure ball valve d18 and the valve c7 in sequence, and injecting water into the pressure-resistant water storage tank 9;
step 3.4, when water does not flow out from the valve c7 and the water level in the water storage tank 10 does not drop, continuously supplementing water into the water storage tank 10;
and 3.5, when water flows out from the valve c7, filling the pressure-resistant water storage tank 9 with water, closing the valve c7 and stopping water injection.
Step four: draining water from the pressure-resistant water storage tank;
step 4.1, opening a valve a2, a high-pressure ball valve d18 and a high-pressure ball valve f20, wherein other valves are in a closed state;
step 4.2, opening the industrial nitrogen cylinder 1, inputting nitrogen into the pressure-resistant water storage tank 9, and allowing water in the pressure-resistant water storage tank 9 to flow out through a pressure relief opening at the bottom of the high-pressure ball valve f 20;
and 4.3, when no water flows out from the pressure relief port at the bottom of the high-pressure ball valve f20, closing the industrial nitrogen cylinder 1 and finishing the drainage of the pressure-resistant water storage tank.
Step five: injecting water into the packer for pressurization;
step 5.1 referring to the step three, filling the pressure-resistant water storage tank 9 with water, and closing all valves;
step 5.2, opening a valve a2, a high-pressure ball valve b16, a high-pressure ball valve c17 and a high-pressure ball valve d 18;
step 5.3, opening the industrial nitrogen cylinder 1 according to the set output pressure, and injecting high-pressure nitrogen into the pressure-resistant water storage tank 9;
step 5.4, when the pressure displayed by a pressure gauge a8 of the pressure-resistant water storage tank 9 reaches the set output pressure, closing the pressure-resistant water storage tank, opening a high-pressure ball valve f20, and discharging residual water in a pipeline of a pressure control plate;
and 5.5, when the packer is used for monitoring the underground water stratification, keeping the industrial nitrogen cylinder 1, the valve a2, the high-pressure ball valve b16, the high-pressure ball valve c17 and the high-pressure ball valve d18 in an open state for a long time so as to keep the stable working pressure of the packer 4, and periodically referring to the step of supplementing water in the three-way high-pressure-resistant water storage tank 9.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (14)
1. The utility model provides a pressure regulation and control device of packer which characterized in that: the device comprises an industrial nitrogen cylinder (1), a pressure control plate (3), a packer (4), a vacuum pump (5), a pressure gauge a (8), a pressure-resistant water storage tank (9) and a water tank (10);
wherein, the branch pipe of industry nitrogen cylinder (1) and the branch pipe of vacuum pump (5) join the back through the inlet connection of trunk line and withstand voltage water storage tank (9), and the export of withstand voltage water storage tank (9) is connected through pipeline and pressure control panel (3), and industry nitrogen cylinder (1) is connected through pipeline and pressure control panel (3), and pressure control panel (3) are connected with packer (4) and water tank (10) respectively again.
2. A pressure regulating device for a packer as claimed in claim 1, wherein: and a valve a (2) is arranged on the branch pipe of the industrial nitrogen cylinder (1).
3. A pressure regulating device for a packer as claimed in claim 2, wherein: and a valve b (6) is arranged on the branch pipe of the vacuum pump (5).
4. A pressure regulating device for a packer as claimed in claim 3, wherein: and a valve c (7) is arranged on a main pipeline after the branch pipe of the industrial nitrogen cylinder (1) and the branch pipe of the vacuum pump (5) are converged.
5. A pressure regulating device for a packer as claimed in claim 4, wherein: and a pressure gauge a (8) is arranged on the pressure-resistant water storage tank (9).
6. A pressure regulating device for a packer as claimed in claim 5, wherein: the pressure control plate (3) is provided with two horizontal pipelines and a vertical pipeline in common, the end parts of the two horizontal pipelines are provided with a straight joint a (11), a straight joint b (12), a straight joint c (13) and a straight joint d (14), a high-pressure ball valve a (15) and a high-pressure ball valve b (16) are arranged between the straight joint a (11) and the straight joint c (13), and a high-pressure ball valve d (18) and a high-pressure ball valve e (19) are arranged between the straight joint b (12) and the straight joint d (14).
7. The pressure regulating device of the packer as claimed in claim 6, wherein: the direct joint a (11), the direct joint b (12), the direct joint c (13) and the direct joint d (14) are respectively connected with the industrial nitrogen cylinder (1), the pressure-resistant water storage tank (9), the packer (4) and the water tank (10).
8. A pressure regulating device for a packer as claimed in claim 7, wherein: the top of one vertical pipeline is connected with a pressure gauge b (21), a high-pressure ball valve c (17) is built in the vertical pipeline, and the bottom of the vertical pipeline is used for controlling the pipeline to release pressure through a high-pressure ball valve f (20).
9. A method of controlling a pressure regulating device for a packer according to claim 8, wherein: the method comprises the following steps:
the method comprises the following steps: pressurizing the packer when industrial nitrogen is used;
step two: when industrial nitrogen is used, the packer is decompressed;
step three: injecting water into the pressure-resistant water storage tank (9);
step four: the pressure-resistant water storage tank (9) discharges water;
step five: and injecting water into the packer for pressurization.
10. A method of controlling a pressure regulating device for a packer according to claim 9, wherein: the first step comprises the following steps:
step 1.1, opening a high-pressure ball valve a (15) and a high-pressure ball valve b (16), and closing all other valves;
step 1.2, opening a switch of an industrial nitrogen cylinder (1), adjusting output pressure and then conveying industrial nitrogen to a packer (4);
step 1.3, in the pressurizing process, closing the high-pressure ball valve a (15), and checking whether the reading of the pressure gauge b (21) is consistent with the set output pressure or not;
step 1.4, if the reading of a pressure gauge b (21) is lower than the set output pressure, opening a high-pressure ball valve a (15) and continuing to pressurize the packer (4);
and 1.5, if the reading of the pressure gauge b (21) is lower than the set output pressure and is consistent, keeping the high-pressure ball valve a (15) closed, closing the high-pressure ball valve b (16), opening the high-pressure ball valve f (20), discharging residual industrial nitrogen in the pipeline of the pressure control plate (3), and finishing the pressurization process of the packer (4).
11. A method of controlling a pressure regulating device for a packer according to claim 10, wherein: the second step comprises the following steps:
step 2.1, opening a high-pressure ball valve c (17) and a high-pressure ball valve f (20), and closing other valves;
step 2.2, opening a high-pressure ball valve b (16) and discharging industrial nitrogen in the packer (4);
and 2.3, after no air flow exists in an air outlet at the lower part of the high-pressure ball valve f (20), closing the high-pressure ball valve b (16), the high-pressure ball valve c (17) and the high-pressure ball valve f (20), and finishing the pressure relief process of the packer (4).
12. A method of controlling a pressure regulating device for a packer according to claim 11, wherein: the third step comprises the following steps:
step 3.1, the water storage tank (10) is placed at a high position, so that the bottom of the water storage tank is basically at the same height as a valve c (7) at the top of the pressure-resistant water storage tank (9);
step 3.2, checking all valves c (7), turning to a closed state, and filling the water storage tank (10) with clear water;
3.3, opening a high-pressure ball valve e (19), a high-pressure ball valve d (18) and a valve c (7) in sequence, and injecting water into the pressure-resistant water storage tank (9);
step 3.4, when water does not flow out from the valve c (7) and the water level in the water storage tank (10) does not drop, continuously supplementing water into the water storage tank (10);
and 3.5, when water flows out of the valve c (7), filling the pressure-resistant water storage tank (9) with water, closing the valve c (7) and stopping water injection.
13. A method of controlling a pressure regulating device for a packer according to claim 12, wherein: the fourth step comprises the following steps:
step 4.1, opening a valve a (2), a high-pressure ball valve d (18) and a high-pressure ball valve f (20), wherein other valves are in a closed state;
step 4.2, opening the industrial nitrogen cylinder (1), inputting nitrogen into the pressure-resistant water storage tank (9), and allowing water in the pressure-resistant water storage tank (9) to flow out through a pressure relief opening at the bottom of the high-pressure ball valve f (20);
and 4.3, when no water flows out from the pressure relief port at the bottom of the high-pressure ball valve f (20), closing the industrial nitrogen cylinder (1) and finishing the drainage of the pressure-resistant water storage tank (9).
14. A method of controlling a pressure regulating device for a packer according to claim 13, wherein: the fifth step comprises the following steps:
step 5.1, referring to the step three, filling water into the pressure-resistant water storage tank (9), and closing all valves;
step 5.2, opening a valve a (2), a high-pressure ball valve b (16), a high-pressure ball valve c (17) and a high-pressure ball valve d (18);
step 5.3, opening the industrial nitrogen cylinder (1) according to the set output pressure, and injecting high-pressure nitrogen into the pressure-resistant water storage tank (9);
step 5.4, when the pressure displayed by a pressure gauge a (8) of the pressure-resistant water storage tank (9) reaches the set output pressure, closing the pressure-resistant water storage tank, opening a high-pressure ball valve f (20), and discharging residual water in a pressure control plate pipeline;
and 5.5, when the packer is used for monitoring the underground water layering, keeping the industrial nitrogen cylinder (1), the valve a (2), the high-pressure ball valve b (16), the high-pressure ball valve c (17) and the high-pressure ball valve d (18) in an open state for a long time so as to keep the stable working pressure of the packer (4), and periodically referring to the step of supplementing water into the three-way high-pressure-resistant water storage tank 9.
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