CN112343582B - Underground internal and external pressure monitoring device - Google Patents
Underground internal and external pressure monitoring device Download PDFInfo
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- CN112343582B CN112343582B CN202011202935.XA CN202011202935A CN112343582B CN 112343582 B CN112343582 B CN 112343582B CN 202011202935 A CN202011202935 A CN 202011202935A CN 112343582 B CN112343582 B CN 112343582B
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- pressure
- pressure monitoring
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- 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
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
Abstract
The invention discloses a downhole internal and external pressure monitoring device, wherein the downhole internal and external pressure monitoring device comprises: pressure monitor, pressure transmission cylinder and roll director. The pressure monitoring instrument is characterized in that an inner pressure monitoring bin and an outer pressure monitoring bin are arranged inside the wall of the pressure transmission barrel, the inner pressure monitoring bin and the inner pressure monitoring bin are respectively provided with the pressure monitoring instrument, an inner pressure transmission hole is formed between the inner pressure monitoring bin and the hollow inside of the pressure transmission barrel, and an outer pressure transmission hole is formed in the pressure transmission barrel wall. In order to solve in the past the pressure gauge small can't be fixed, can't be along with the synchronous well descending of fracturing string, the unable internal and external pressure of simultaneous test fracturing string of single pressure gauge, and single pressure gauge test result does not have referential, contrast, and the pressure gauge is difficult for depositing and taking out in the pit, and the pressure gauge is gone into the pit in-process card easily and is caused the difficulty of going into the pit or damage the problem of pressure gauge on the oil pipe inner wall.
Description
Technical Field
The invention relates to the field of oil extraction engineering, in particular to an underground internal and external pressure monitoring device.
Background
In an oil field oil extraction fracturing driving experiment, monitoring of pressure inside and outside a fracturing pipe column is very important, pressure monitoring can be used for monitoring the construction effect of the fracturing pipe column in real time, and response of a stratum to the fracturing experiment is verified. The pressure gauge that current pressure test technology used in the pit is small, can't fix, be difficult for depositing and take out, generally adopts single pressure gauge measurement, and the result does not have comparability, and does not possess the function of the inside and outside pressure of simultaneous measurement fracturing string, and goes into the pit in-process under, blocks easily and leads to the difficulty of going into the pit at the oil pipe inner wall.
Disclosure of Invention
In view of this, the present invention provides a downhole internal and external pressure monitoring device to solve the following problems, 1, the pressure gauge has a small volume and cannot be fixed, and the pressure gauge cannot be synchronously downhole along with a fracturing string. 2. The pressure gauge can not test the internal pressure and the external pressure of the fracturing string at the same time, and the test result of the pressure gauge has no reference and contrast. 3. The pressure gauge is not easily stored and removed downhole. 4. The pressure gauge is easy to be blocked on the inner wall of the oil pipe in the process of going down into the well, so that the pressure gauge is difficult to go down into the well or damaged.
The invention provides a downhole internal and external pressure monitoring device, which comprises: the device comprises a pressure monitor, a pressure transmission cylinder and a rolling guider;
the pressure transmission cylinder is hollow, an internal pressure monitoring bin and an external pressure monitoring bin are arranged in the cylinder wall of the pressure transmission cylinder, and the pressure monitors are respectively arranged in the internal pressure monitoring bin and the external pressure monitoring bin;
the pressure monitor is used for detecting and storing a downhole pressure value;
an internal pressure transmitting hole is formed between the internal pressure monitoring bin and the hollow interior of the pressure transmitting cylinder, and the internal pressure transmitting hole is used for communicating the interior of the internal pressure monitoring bin with the hollow interior of the pressure transmitting cylinder;
the wall of the pressure transmission cylinder is provided with an external pressure transmission hole which is communicated with the inside of the external pressure monitoring bin and the external environment of the pressure transmission cylinder;
the guider is installed on the outer wall of the pressure transmission barrel, and the rolling guider is used for preventing the pressure transmission barrel from being clamped on the inner wall of the pipe column in the process of descending into the well.
Preferably, the guide comprises: the device comprises a first bracket, a second bracket and a roller;
one end of the first bracket is connected with the side wall of one end of the pressure transmission cylinder, and one end of the second bracket is connected with the side wall of the other end of the pressure transmission cylinder;
the other end of the first bracket is connected with the other end of the second bracket through the roller shaft;
the side wall of the pressure transmission cylinder is symmetrically provided with the first support, the second support and the roller.
Preferably, one end of the internal pressure monitoring cabin is an opening, and the other end of the internal pressure monitoring cabin is provided with a first release mechanism;
one end of the external pressure monitoring bin is provided with an opening, and the other end of the external pressure monitoring bin is provided with a second release mechanism;
the first release mechanism and the second release mechanism are used for enabling the pressure inside the internal pressure monitoring cabin and the pressure inside the external pressure monitoring cabin to be the same as the pressure outside the external environment.
Preferably, the first release mechanism comprises: a first relief hole and a first bolt;
the first release hole is used for communicating the interior of the internal pressure monitoring bin with the exterior of the pressure transmission cylinder;
the first bolt is installed on the first release hole.
Preferably, the second release mechanism comprises: a second release hole and a second bolt;
the second release hole is used for communicating the inside of the external pressure monitoring bin with the outside of the pressure transmission cylinder;
the second bolt is installed on the second release hole.
Preferably, the pressure monitor comprises: a pressure gauge;
the pressure gauge is used for detecting and storing pressure.
Preferably, at least two pressure gauges are installed inside the internal pressure monitoring bin;
at least two pressure gauges are installed inside the external pressure monitoring bin.
Preferably, the method further comprises the following steps: a gland;
the gland is connected with one end of the pressure transmission cylinder through a threaded structure.
The invention has the following beneficial effects:
the invention provides a downhole internal and external pressure monitoring device, which solves the following problems that 1, the conventional pressure gauge has small volume and cannot be fixed and synchronously lowered along with a fracturing string. 2. The pressure inside and outside the fracturing string can not be tested simultaneously by a single pressure gauge, and the test result of the single pressure gauge has no reference and contrast. 3. The pressure gauge is not easily stored and removed downhole. 4. The pressure gauge is easy to be blocked on the inner wall of the oil pipe in the process of going down into the well, so that the pressure gauge is difficult to go down into the well or damaged. The invention has simple operation, convenient installation and low processing cost. The fracturing pipe column is simultaneously put in and is not easy to fall off, and powerful guarantee is provided for monitoring of a fracturing driving experiment.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a cross-sectional view of a downhole internal and external pressure monitoring device according to an embodiment of the invention.
In the figure: 1-pressure transfer cylinder, 2-internal pressure monitoring bin, 3-external pressure monitoring bin, 4-internal pressure transfer hole, 5-external pressure transfer hole, 6-first support, 7-second support, 8-roller, 9-first release hole, 10-second release hole, 11-pressure gauge and 12-pressure cover.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.
Furthermore, those skilled in the art will appreciate that the drawings are provided for purposes of illustrating the objects, features, and advantages of the present disclosure and are not necessarily to scale.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, the meaning of "includes but is not limited to".
Fig. 1 is a schematic structural diagram of a downhole internal and external pressure monitoring device according to an embodiment of the invention. As shown in fig. 1, a downhole internal and external pressure monitoring device includes: pressure monitor, pressure transmission cylinder 1, gland 12 and rolling director. The inside of pressure transmission barrel 1 is cavity, and the section of thick bamboo wall of pressure transmission barrel 1 is inside to have interior pressure monitoring storehouse 2 and external pressure monitoring storehouse 3, and the pressure monitoring appearance is installed respectively to the inside in interior pressure monitoring storehouse 2 and external pressure monitoring storehouse 2. The pressure monitor is used for detecting and storing the underground pressure value. An internal pressure transmitting hole 4 is formed between the internal pressure monitoring bin 2 and the hollow interior of the pressure transmitting cylinder 1, and the internal pressure transmitting hole 4 is used for communicating the interior of the internal pressure monitoring bin 2 with the hollow interior of the pressure transmitting cylinder 1. An external pressure transmitting hole 5 is formed in the wall of the pressure transmitting cylinder 1, and the external pressure transmitting hole 5 is communicated with the inside of the external pressure monitoring bin 3 and the external environment of the pressure transmitting cylinder 1. The director is installed on the pressure transmission section of thick bamboo 1 outer wall that passes, and the roll director is used for preventing that pressure transmission section of thick bamboo 1 goes into the in-process card on the tubular column inner wall in the pit.
In the embodiment of the present invention, the pressure transmission cylinder 1 has a cylindrical body, a hollow interior, and two open ends. When underground pressure measurement is carried out, one end of the pressure transmission cylinder 1 is connected with the pipe column, the other end of the pressure transmission cylinder 1 is connected with the fracturing pipe column, and the interior of the fracturing pipe column is communicated with the interior of the hollow of the pressure transmission cylinder 1. The pipe column, the pressure transmission cylinder 1 and the fracturing pipe column are put into the well together, in the process of going into the well, the inner wall of the oil pipe in the well is possibly provided with the condition of unevenness, and the guider can prevent the pressure transmission cylinder 1 from being clamped on the inner wall of the oil pipe in the well to cause the difficulty of going into the well. Because the internal pressure transmitting hole 4 communicates the internal pressure monitoring bin 2 and the hollow interior of the pressure transmitting cylinder 1, the internal pressure monitoring bin 2, the pressure transmitting cylinder 1 and the fracturing string are communicated with the inside and then have the same pressure, and the pressure monitor in the internal pressure monitoring bin 2 detects the internal pressure of the internal pressure monitoring bin 2 and stores the internal pressure. Because external pressure passes pressure hole 5 intercommunication external pressure and detects storehouse and 1 outsidely of pressure transmission section of thick bamboo for the inside pressure in external pressure monitoring storehouse 3 is outside with pressure transmission section of thick bamboo 1, and oil pipe internal pressure is the same promptly, and the pressure monitoring appearance that is in external pressure monitoring storehouse 3 detects 3 internal pressure in external pressure monitoring storehouse and saves.
In the present invention and fig. 1, the guide comprises: a first bracket 6, a second bracket 7 and a roller 8. One end of the first bracket 6 is connected with the side wall at one end of the pressure transmission cylinder 1, and one end of the second bracket 7 is connected with the side wall at the other end of the pressure transmission cylinder 1. The other end of the first bracket 6 is connected with the other end of the second bracket 7 through a roller 8 shaft. The side wall of the pressure transmission cylinder 1 is symmetrically provided with a first bracket 6, a second bracket 7 and a roller 8.
In the embodiment of the present invention, a triangle is formed between the first bracket 6, the second bracket 7, and the roller 8 and the sidewall of the pressure transfer drum 1, and the roller 8 can rotate along the connection point of the first bracket 6 and the second bracket 7 as an axis. When going into the pit with a pressure transmission section of thick bamboo 1, two pairs of first supports 6, second support 7 and gyro wheel 8 in the pressure transmission section of thick bamboo 1 outside play the effect of rightting, make the outer wall of pressure transmission section of thick bamboo 1 can not direct contact to the oil pipe inner wall, gyro wheel 8 rolls with the contact of oil pipe inner wall, and gyro wheel 8 can roll smoothly when meetting oil pipe inner wall unevenness's position, thereby reduces the resistance between pressure transmission section of thick bamboo 1 and the oil pipe inner wall, makes pressure transmission section of thick bamboo 1 go into the pit smoothly.
In the present invention and fig. 1, one end of the internal pressure monitoring chamber 2 is open, and the other end thereof is provided with a first release mechanism. One end of the external pressure monitoring bin 3 is provided with an opening, and the other end of the external pressure monitoring bin is provided with a second release mechanism. The first release mechanism and the second release mechanism are used for enabling the internal pressure of the internal pressure monitoring cabin 2 and the external pressure monitoring cabin 3 to be the same as the external environment.
Wherein, interior pressure monitoring storehouse 2 and external pressure monitoring storehouse 3 are two cavitys inside the section of thick bamboo wall of pressure transmission section of thick bamboo 1, and the one end in interior pressure monitoring storehouse 2 and external pressure monitoring storehouse 3 is the opening respectively, and open-ended position is on the terminal surface of pressure transmission section of thick bamboo 1 one end. The position of the inner pressure transmitting hole 4 is close to the middle position of the inner pressure monitoring bin 2, and the position of the outer pressure transmitting hole 5 is close to the middle position of the outer pressure monitoring bin 3.
In the embodiment of the invention, the pressure transmitting cylinder 1 is put into the underground, after the pressure is detected and stored by the pressure monitor, when the underground pressure record needs to be read, the pressure monitor needs to be taken out from the inner pressure monitoring bin 2 and the outer pressure monitoring bin 3 for reading data, because the outer wall of the pressure monitor and the inner wall of the inner pressure monitoring bin 2 or the outer pressure monitoring bin 3 are in a tight state, a vacuum state is easy to occur between the pressure monitor and the other end of the inner pressure monitoring bin 2 or the other end of the outer pressure monitoring bin 3, so that the pressure monitor cannot be taken out, the other ends of the inner pressure monitoring bin 2 and the outer pressure monitoring bin 3 are respectively provided with the first release mechanism and the second release mechanism, when the pressure monitor needs to be taken out, the first release mechanism and the second release mechanism are opened, so that the internal pressures of the other ends of the inner pressure monitoring bin 2 and the outer pressure monitoring bin 3 are the same as the external environment, and the pressure monitor can be taken out smoothly.
In the present invention and fig. 1, the first release mechanism includes: a first release hole 9 and a first bolt. The first release hole 9 is used to communicate the inside of the internal pressure monitoring cartridge 2 with the outside of the pressure-transmitting cylinder 1. The first bolt is installed on the first release hole 9.
In the embodiment of the invention, the first release hole 9 is a through hole on the pressure transmitting cylinder 1 and is positioned close to the other end of the internal pressure monitoring bin 2, the first release hole 9 is communicated with the inside of the internal pressure monitoring bin 2 and the external environment, when the pressure transmitting cylinder 1 is put down to the well, a first bolt is installed on the first release hole 9 to close the first release hole 9, and when the pressure monitor in the internal pressure monitoring bin 2 needs to be taken out, if the pressure monitor and the other end in the internal pressure monitoring bin 2 are vacuumized and cannot be taken out, the first bolt is screwed down to communicate the other end of the internal pressure monitoring bin 2 with the external environment, so that the pressure monitor can be taken out smoothly.
In the present invention and fig. 1, the second release mechanism includes: a second release hole 10 and a second bolt. The second release hole 10 is used for communicating the inside of the external pressure monitoring bin 3 with the outside of the pressure-transmitting cylinder 1. The second bolt is installed on the second release hole 10.
In the embodiment of the invention, the second release hole 10 is a through hole on the pressure transmitting cylinder 1 and is positioned close to the other end of the external pressure monitoring bin 3, the second release hole 10 is communicated with the inside and the external environment of the external pressure monitoring bin 3, when the pressure transmitting cylinder 1 is put into a well, a second bolt is installed on the second release hole 10 to block the second release hole 10, and when the pressure monitor in the external pressure monitoring bin 3 needs to be taken out, if the pressure monitor is not taken out due to vacuum between the pressure monitor and the other end in the external pressure monitoring bin 3, the second bolt is screwed down to communicate the other end in the external pressure monitoring bin 3 with the external environment, so that the pressure monitor can be taken out smoothly.
In the present invention and fig. 1, the pressure monitor includes: and a pressure gauge 11. The pressure gauge 11 is used to detect and store pressure.
In the embodiment of the present invention, the pressure gauge 11 may be an existing storage type pressure gauge 11, and the storage type pressure gauge 11 is an existing commercially available product and can detect and store pressure in different time periods.
In the present invention and fig. 1, at least two pressure gauges 11 are installed inside the internal pressure monitoring chamber 2. At least two pressure gauges 11 are installed inside the external pressure monitoring bin 3.
In the embodiment of the invention, two pressure gauges 11 in the internal pressure monitoring bin 2 are arranged, one is close to one end of the internal pressure monitoring bin 2, the other is close to the other end of the internal pressure monitoring bin 2, a gap is arranged between the two pressure gauges 11, and the internal pressure transmission hole 4 is arranged on the pressure transmission cylinder 1 at a position corresponding to the gap.
Two pressure gauges 11 in the external pressure monitoring storehouse 3, one is close to the one end in external pressure monitoring storehouse 3, and another is close to the other end in external pressure monitoring storehouse 3, has the clearance between two pressure gauges 11, and external pressure passes pressure hole 5 to be in and passes the position corresponding with the clearance on the pressure cylinder 1.
The inner pressure transmitting hole 4 and the outer pressure transmitting hole 5 are arranged on the pressure transmitting cylinder 1 at positions opposite to the gap between the two pressure gauges 11, and are used for enabling the inner pressure and the outer pressure of the pressure transmitting cylinder 1 to smoothly enter the inner pressure monitoring bin 2 and the outer pressure monitoring bin 3, so that the pressure gauges 11 can accurately detect the pressure.
Put into two pressure gauges 11 simultaneously and go into down the pit and measure in internal pressure monitoring storehouse 2 and external pressure monitoring storehouse 3 respectively, can contrast two pressure gauges 11 measuring results when taking out, guarantee measuring accuracy.
In the present invention and fig. 1, the present invention further includes: a gland 12. The gland 12 is mounted at one end of the pressure transfer cylinder 1 by a screw structure.
In the embodiment of the invention, the interior of the gland 12 is hollow, two ends of the gland are provided with openings, one end of the gland 12 is provided with an internal thread, one end of the pressure transfer cylinder 1 is provided with an external thread matched with the internal thread, when the gland 12 is connected with the pressure transfer cylinder 1 through a thread structure, the gland 12 covers one end of the pressure transfer cylinder 1 to plug the openings of the internal pressure monitoring bin 2 and the external pressure monitoring bin 3 at one end of the pressure transfer cylinder 1, so that the internal pressure monitor is prevented from falling out. The other end of the gland 12 is connected to the pipe column.
In the embodiment of the invention, when the underground pressure is measured, the two pressure gauges 11 are respectively arranged in the internal pressure monitoring bin 2 and the external pressure monitoring bin 3. One end of a gland 12 is connected with one end of a pressure transmission cylinder 1, the other end of the gland 12 is connected with a pipe column, and the other end of the pressure transmission cylinder 1 is connected with a fracturing pipe column through a threaded structure. With inside the tubular column, pass and press a section of thick bamboo 1 and fracturing string together go into oil pipe in the pit, pass and press the first support 6 in a 1 outside, second support 7 and gyro wheel 8 play the effect of rightting, make the outer wall of passing and pressing a section of thick bamboo 1 can not the direct contact to the oil pipe inner wall, gyro wheel 8 rolls with the contact of oil pipe inner wall, gyro wheel 8 can roll smoothly when meetting oil pipe inner wall unevenness's position to reduce the resistance between passing and pressing a section of thick bamboo 1 and the oil pipe inner wall. The interior of the fracturing string is communicated with the interior of the pressure transmitting cylinder 1, the internal pressure monitoring bin 2 is communicated with the interior of the pressure transmitting cylinder 1 through an internal pressure transmitting hole 4, and two pressure gauges 11 in the internal pressure monitoring bin 2 measure and store pressure. The external pressure monitoring bin 3 is communicated with the internal environment of the underground oil pipe through an external pressure transmitting hole 5, and two pressure gauges 11 in the external pressure monitoring bin 3 measure and store pressure. When needs read pressure record, take out pressure transmission cylinder 1 from the pit, take down gland 12 rotation, pour inside pressure gauge 11, if the other end in interior pressure monitoring storehouse 2 and the external pressure monitoring storehouse 3 and the inside pressure gauge 11 between the vacuum phenomenon appear and make pressure gauge 11 can't pour out, then screw down first bolt or second bolt, interior pressure monitoring storehouse 2 communicates with external environment through first release hole 9 this moment, external pressure monitoring storehouse 3 communicates with external environment through second release hole 10, interior pressure monitoring storehouse 2 or external pressure monitoring storehouse 3 internal pressure and external environment are balanced after, can pour out pressure gauge 11 smoothly and carry out data reading.
The invention relates to an underground internal and external pressure monitoring device, which solves the problem that underground pressure change cannot be monitored in real time in the fracturing driving process during oil extraction, and a designed pressure transmission cylinder 1 can be integrated with a fracturing string, so that a pressure gauge 11 can be put into a well along with the fracturing string. And the pressure change inside and outside the fracturing string in the fracturing driving process can be dynamically monitored at the same time. Through changing interior pressure monitoring storehouse 2 and 3 inner spaces size in external pressure monitoring storehouse and can put into many manometers 11, make it can hold many manometers 11 simultaneous workings simultaneously, overcome the uncertainty and the no contrast of single manometers 11 test results. The first release mechanism and the second release mechanism arranged at the other ends of the internal pressure monitoring bin 2 and the external pressure monitoring bin 3 enable the pressure gauge 11 inside to be taken out smoothly.
The invention has simple installation and low manufacturing cost, is not easy to fall off when being put into the underground along with the fracturing string, provides powerful guarantee for monitoring the pressure drive experiment, reduces the labor intensity of operators and improves the working efficiency.
The above examples are merely illustrative of the present invention, and are described in more detail, but not intended to limit the scope of the invention. It should be noted that, for those skilled in the art, various changes, substitutions of equivalents, improvements and the like can be made without departing from the spirit of the invention, and these are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (3)
1. A downhole internal and external pressure monitoring device, comprising: the pressure monitoring device comprises a pressure monitor, a pressure transmission cylinder (1) and a rolling guider;
the pressure transmission cylinder (1) is hollow, an internal pressure monitoring bin (2) and an external pressure monitoring bin (3) are arranged inside the cylinder wall of the pressure transmission cylinder (1), and the pressure monitors are respectively installed inside the internal pressure monitoring bin (2) and the external pressure monitoring bin (3);
the pressure monitor is used for detecting and storing a downhole pressure value;
an internal pressure transmitting hole (4) is formed between the internal pressure monitoring bin (2) and the hollow interior of the pressure transmitting cylinder (1), and the internal pressure transmitting hole (4) is used for communicating the interior of the internal pressure monitoring bin (2) with the hollow interior of the pressure transmitting cylinder (1);
the wall of the pressure transmitting cylinder (1) is provided with an external pressure transmitting hole (5), and the external pressure transmitting hole (5) is communicated with the inside of the external pressure monitoring bin (3) and the external environment of the pressure transmitting cylinder (1);
the guide device is arranged on the outer wall of the pressure transmission cylinder (1), and the rolling guide device is used for preventing the pressure transmission cylinder (1) from being clamped on the inner wall of a pipe column in the process of descending into the well;
one end of the internal pressure monitoring bin (2) is provided with an opening, the other end of the internal pressure monitoring bin (2) is provided with a first release mechanism, one end of the external pressure monitoring bin (3) is provided with an opening, and the other end of the external pressure monitoring bin (3) is provided with a second release mechanism;
the first release mechanism includes: a first release hole (9) and a first bolt, wherein the first release hole (9) is used for communicating the interior of the internal pressure monitoring bin (2) with the exterior of the pressure transfer cylinder (1), and the first bolt is installed on the first release hole (9);
the second release mechanism includes: the second release hole (10) is used for communicating the inside of the external pressure monitoring bin (3) with the outside of the pressure transfer cylinder (1), and a second bolt is arranged on the second release hole (10);
the pressure monitor includes: a pressure gauge (11); at least two pressure gauges (11) are arranged in the inner pressure monitoring bin (2), and at least two pressure gauges (11) are arranged in the outer pressure monitoring bin (3);
two pressure gauges (11) in the internal pressure monitoring bin (2), wherein one pressure gauge is close to one end of the internal pressure monitoring bin (2), the other pressure gauge is close to the other end of the internal pressure monitoring bin (2), a gap is formed between the two pressure gauges (11), and the internal pressure transmission hole (4) is positioned on the pressure transmission cylinder (1) and corresponds to the gap;
two pressure gauges (11) in external pressure monitoring storehouse (3), one is close to the one end in external pressure monitoring storehouse (3), and another is close to the other end in external pressure monitoring storehouse (3), has the clearance between two pressure gauges (11), external pressure biography pressure hole (5) are in on passing a pressure section of thick bamboo (1) with the corresponding position in clearance.
2. The downhole internal and external pressure monitoring device of claim 1, wherein the guide comprises: a first bracket (6), a second bracket (7) and a roller (8);
one end of the first bracket (6) is connected with the side wall of one end of the pressure transmission cylinder (1), and one end of the second bracket (7) is connected with the side wall of the other end of the pressure transmission cylinder (1);
the other end of the first bracket (6) is connected with the other end of the second bracket (7) through the roller (8) shaft;
the side wall of the pressure transmission cylinder (1) is symmetrically provided with the first support (6), the second support (7) and the roller (8).
3. The downhole internal and external pressure monitoring device according to claim 1 or 2, further comprising: a gland (12);
the gland (12) is connected with one end of the pressure transmission cylinder (1) through a thread structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202935.XA CN112343582B (en) | 2020-11-02 | 2020-11-02 | Underground internal and external pressure monitoring device |
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|---|---|---|---|
| CN202011202935.XA CN112343582B (en) | 2020-11-02 | 2020-11-02 | Underground internal and external pressure monitoring device |
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| CN112343582A CN112343582A (en) | 2021-02-09 |
| CN112343582B true CN112343582B (en) | 2023-01-31 |
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| CN114427446B (en) * | 2022-04-06 | 2022-05-31 | 山东地瑞科森能源技术股份有限公司 | Underground pressure monitoring device and method for petroleum production |
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