CN113202458B - Tail pipe type underground electronic pressure gauge with oil drainage function - Google Patents
Tail pipe type underground electronic pressure gauge with oil drainage function Download PDFInfo
- Publication number
- CN113202458B CN113202458B CN202110676389.1A CN202110676389A CN113202458B CN 113202458 B CN113202458 B CN 113202458B CN 202110676389 A CN202110676389 A CN 202110676389A CN 113202458 B CN113202458 B CN 113202458B
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- Prior art keywords
- oil drainage
- shell
- oil
- pressure gauge
- piston
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Examining Or Testing Airtightness (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a tail pipe type underground electronic pressure gauge with an oil drainage function, which comprises a shell, a pressure detection assembly, an oil drainage assembly and a fixed joint, wherein the fixed joint is arranged in the shell and is used for dividing an inner cavity of the shell into an upper part and a lower part, and the pressure detection assembly is arranged at the upper half part of the inner cavity of the shell and is used for sensing the change of stratum pressure; the oil drainage assembly is arranged at the lower half of the inner cavity of the shell and is used for completely leaking well fluid in an oil pipe into a well when an oil pipe string is started. The invention is arranged at the tail part of the construction string, after the formation pressure test is finished, the valve on the pressure gauge can be automatically opened, and well fluid in the oil pipe can be discharged into the well when the oil pipe string is started, so that the pollution caused by the well fluid brought to the ground along with the oil pipe can be avoided.
Description
Technical Field
The invention belongs to the technical field of oilfield test development and environmental protection, and particularly relates to a tail pipe type underground electronic pressure gauge with an oil drainage function.
Background
In oilfield production and exploitation, formation pressure tests are often carried out to master formation dynamic information, such as underground shut-in pressure measurement, layering pressure measurement and the like, and the construction of the tests is to convey a test tool string and an underground electronic meter to a preset depth according to a preset string structure by adopting an oil pipe, so that the test is completed, and then the oil pipe and the tool string are lifted out of the ground after the test is completed. The underground electronic meter is generally fixed on a special support barrel or a tool serial connector and is connected in series in the middle of a descending oil pipe, knocking frequently occurs when the oil pipe is disassembled, so that the pressure meter is damaged, recorded data of the pressure meter cannot be read, and test failure is caused.
Disclosure of Invention
Therefore, the main purpose of the invention is to provide a tail pipe type underground electronic pressure gauge with an oil drainage function.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
The embodiment of the invention provides a tail pipe type underground electronic pressure gauge with an oil drainage function, which comprises a shell, a pressure detection assembly, an oil drainage assembly and a fixed joint, wherein the fixed joint is arranged in the shell and is used for dividing an inner cavity of the shell into an upper part and a lower part, and the pressure detection assembly is arranged at the upper half part of the inner cavity of the shell and is used for sensing the change of stratum pressure; the oil drainage assembly is arranged at the lower half of the inner cavity of the shell and is used for completely leaking well fluid in an oil pipe into a well when an oil pipe string is started.
In the scheme, the pressure detection assembly comprises a battery pack, a circuit board and a pressure sensor, wherein the battery pack is electrically connected with the circuit board, the circuit board is connected with the pressure sensor, and the pressure sensor is arranged on the fixed joint and is communicated with the stratum through a pressure guide hole on the shell; the circuit board is also connected with the oil drainage component through a circuit penetrating through the fixed joint.
In the scheme, the circuit board is also welded with a platinum resistance temperature sensor, and the circuit board collects records according to a preset working system and periodically transmits well fluid temperature and downhole pressure data to ground equipment.
In the scheme, an outer protective shell is arranged outside the circuit board.
In the above scheme, the oil drainage group comprises a piston mechanism, a valve core, a valve seat and a limiting piece, wherein the valve core is sleeved outside the output end of the piston mechanism, and limiting pieces are respectively arranged on two sides of a limiting boss positioned at the output end of the piston mechanism and used for releasing the limit of the limiting piece through axial displacement of the piston mechanism, and the valve core is communicated with a liquid passing channel on the valve seat after the limit of the limiting piece is released; the valve seat is connected with the oil pipe connecting end through a flat oil pipe buckle and is matched with the valve core.
In the above-mentioned scheme, piston mechanism includes electron expansion block, piston cylinder, piston, reset spring, slide bar, electron expansion block sets up on the lower terminal surface of fixed joint and is connected with the circuit board of pressure detection subassembly, form the piston chamber between the lower terminal surface of fixed joint and the piston cylinder, the piston setting is in the piston cylinder, slide bar one end is connected with the piston, and the other end is connected with the case, the part cover that the slide bar is located the piston cylinder is equipped with reset spring.
In the above scheme, be provided with on the up end of case and press the cap, be provided with the boss in the shell, set up helping hand spring between the up end of boss and the cap that presses, the lower terminal surface and the locating part butt of boss.
In the above scheme, the limiting piece is a hanging bead.
Compared with the prior art, the invention is arranged at the tail part of the construction string, after the formation pressure test is finished, the valve on the pressure gauge can be automatically opened, and the well liquid in the oil pipe can be leaked into the well when the oil pipe string is started, so that the pollution caused by the well liquid brought to the ground along with the oil pipe can be avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic structural diagram of a tail pipe type underground electronic pressure gauge with oil drainage function in which a liquid passage is closed;
FIG. 2 is a schematic diagram of an electronic expansion block in a tail pipe type downhole electronic pressure gauge with oil drainage function according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a tail pipe type underground electronic pressure gauge with oil drainage function in which a liquid passage is opened.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the devices or elements being referred to must have specific directions, be constructed and operated in specific directions, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration, are not to be construed as limitations of the present patent, and the specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, article or apparatus that comprises the element.
The embodiment of the invention provides a tail pipe type underground electronic pressure gauge with an oil drainage function, which is shown in figures 1-3 and is positioned at the tail part of an oil pipe string, and comprises a shell 1, a pressure detection assembly 2, an oil drainage assembly 3 and a fixed joint 4, wherein the fixed joint 4 is arranged in the shell 1 and is used for dividing an inner cavity of the shell 1 into an upper part and a lower part, and the pressure detection assembly 2 is arranged at the upper half part of the inner cavity of the shell 1 and is used for sensing the change of stratum pressure; the oil drain assembly 3 is arranged at the lower half of the inner cavity of the shell 1 and is used for completely leaking well fluid in an oil pipe into a well when an oil pipe string is lifted.
According to the invention, the tail part of the oil pipe string is arranged to replace a plug in the testing process, the oil drain valve of the tail pipe type underground electronic pressure gauge with the oil drain function is always in a closed state in the well descending process and the testing process, so that the situation that the internal and external communication of the oil pipe cannot complete the testing is prevented, the oil drain assembly 3 of the pressure gauge is automatically opened after the testing is completed, and the well liquid in the oil pipe can be completely leaked into the well without polluting the environment caused by the ground when the oil pipe string is lifted is ensured.
The pressure detection assembly 2 comprises a battery pack 21, a circuit board 22 and a pressure sensor 23, wherein the battery pack 21 is electrically connected with the circuit board 22, the circuit board 22 is connected with the pressure sensor 23, and the pressure sensor 23 is arranged on the fixed joint 4 and is communicated with a stratum through a pressure guide hole 11 on the shell 1; the circuit board 22 is also connected to the drain assembly 3 by a line extending through the fixed joint 4.
A platinum resistance temperature sensor is also welded on the circuit board 22, and the circuit board 22 collects records according to a predetermined working system and periodically transmits well fluid temperature and downhole pressure data to surface equipment.
The circuit board 22 is provided with an outer casing 221 on the outside.
The oil drain assembly 3 comprises a piston mechanism 31, a valve core 32, a valve seat 33 and a limiting piece 34, wherein the valve core 32 is sleeved outside the output end of the piston mechanism 31, the limiting pieces 34 are respectively arranged on two sides of a limiting boss 12 positioned at the output end of the piston mechanism 31, the limiting pieces 34 are used for releasing the limiting of the limiting pieces 34 through axial displacement generated by the piston mechanism 31, and the valve core 32 conducts a liquid passing channel 331 on the valve seat 33 after the limiting of the limiting pieces 34 is released; the valve seat 33 is connected with the oil pipe connecting end through a flat oil pipe buckle and is matched with the valve core 32.
The piston mechanism 31 comprises an electronic expansion block 311, a piston cylinder 312, a piston 313, a return spring 314 and a sliding rod 315, wherein the electronic expansion block 311 is arranged on the lower end face of the fixed joint 4 and is connected with the circuit board 22 of the pressure detection assembly 2, a piston cavity 3121 is formed between the lower end face of the fixed joint 4 and the piston cylinder 312, the piston 313 is arranged in the piston cylinder 312, one end of the sliding rod 315 is connected with the piston 313, the other end of the sliding rod 315 is connected with the valve core 32, and the return spring 314 is sleeved on the part of the sliding rod 315 positioned in the piston cylinder 312.
The electronic expansion block 311 is disposable, the electronic expansion block 311 needs to be replaced once in use, the center of the electronic expansion block 311 is provided with a positive electrode, the shell is a negative electrode, bakelite is used between the positive electrode and the negative electrode, the bakelite is connected with the fixed joint 4 through threads, after the electronic expansion block 311 is installed on the fixed joint 4, the positive electrode is contacted with the sealing plug 41 fixed on the fixed joint 4, the other end of the sealing plug 41 is connected with the circuit board 22 through a wire, the negative electrode is connected with the fixed joint 4, the fixed joint 4 is made of conductive metal materials, and the ground wire of the circuit board 22 is connected with the fixed joint 4 through the wire, so that a power supply loop of the electronic expansion block 311 is realized.
The electronic expansion block 311 comprises a metal shell 3111, an electrode 3112, an electrode insulating base 3113, an electric heating tungsten wire 3114, a high-heat burning material 3115 and moisture-proof waxed paper 3116, one side of the metal shell 3111 is sealed by the electrode insulating base 3113, the other end is sealed by the moisture-proof waxed paper 3116, the inside of the metal shell 3111 is filled with the high-heat burning material 3115, one end of the electrode 3112 penetrates through the electrode insulating base 3113 and is connected with a circuit board 22, and the other end extends into the metal shell 3111 and is connected with the electric heating tungsten wire 3114.
The circuit board 22 supplies power to the electrode 3112, the temperature of the electric heating tungsten wire 3114 is raised gradually after being electrified, when the ignition point of the high-heat combustion material 3115 is reached, the high-heat combustion material 3115 is ignited, and the gas in the piston cavity 3121 is heated to expand to push the piston 313 to drive the sliding rod 315 to move downwards.
The upper end face of the valve core 32 is provided with a pressing cap 321, a boss 12 is arranged in the housing 1, a booster spring 322 is arranged between the upper end face of the boss 12 and the pressing cap 321, and the lower end face of the boss 12 is abutted against the limiting piece 34.
The limiting member 34 is a hanging bead.
After the test period is finished, the circuit board 22 controls the battery pack 21 to supply power to the electronic expansion block 311, at this time, the electronic expansion block 311 can burn rapidly to heat and expand the gas in the piston cavity 3121 to push the piston 313 to drive the sliding rod 315 to move downwards, when the sliding rod 315 moves to a certain position, the hanging beads can slide to the lowest point of the sliding rod 315, at this time, the supporting force of the hanging beads on the valve core 3 disappears, the valve core 32 can move in the inner hole of the valve seat 33 to the opening direction of the valve under the action of the power-assisted spring 322 to realize the opening of the valve, thereby opening the liquid passing channel 331 of the valve seat 33 to achieve the purpose of leaking the well liquid in the oil pipe when the well is started.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. The tail pipe type underground electronic pressure gauge with the oil drainage function is characterized by comprising a shell, a pressure detection assembly, an oil drainage assembly and a fixed joint, wherein the fixed joint is arranged in the shell and is used for dividing an inner cavity of the shell into an upper part and a lower part, and the pressure detection assembly is arranged at the upper half part of the inner cavity of the shell and is used for sensing the change of stratum pressure; the oil drainage assembly is arranged at the lower half part of the inner cavity of the shell and is used for completely leaking well fluid in an oil pipe into a well when an oil pipe string is started; the oil drainage assembly comprises a piston mechanism, a valve core, a valve seat and a limiting piece, wherein the valve core is sleeved outside an output end of the piston mechanism, the limiting pieces are respectively arranged on two sides of a limiting boss positioned at the output end of the piston mechanism and used for releasing the limit of the limiting piece through axial displacement of the piston mechanism, and the valve core is conducted with a liquid passing channel on the valve seat after the limit of the limiting piece is released; the valve seat is connected with the oil pipe connecting end through a flat oil pipe buckle and is matched with the valve core; the oil drainage component of the tail pipe type underground electronic pressure gauge with the oil drainage function is always in a closed state in the well descending process and the testing process, so that the fact that the internal and external communication of the oil pipe cannot complete the testing is prevented, the oil drainage component is automatically opened after the testing is completed, and the fact that well fluid in the oil pipe is completely leaked into the well and is not brought to the ground when the oil pipe string is lifted is ensured.
2. The underground electronic pressure gauge with the oil drainage function according to claim 1, wherein the pressure detection assembly comprises a battery pack, a circuit board and a pressure sensor, the battery pack is electrically connected with the circuit board, the circuit board is connected with the pressure sensor, and the pressure sensor is arranged on the fixed joint and is communicated with a stratum through a pressure guide hole on the shell; the circuit board is also connected with the oil drainage component through a circuit penetrating through the fixed joint.
3. The tailpipe type downhole electronic pressure gauge with oil drainage function according to claim 2, wherein a platinum resistance temperature sensor is welded on the circuit board, and the circuit board collects records according to a preset working system and periodically transmits well fluid temperature and downhole pressure data to surface equipment.
4. The tail pipe type downhole electronic pressure gauge with oil drainage function according to claim 3, wherein an outer protective shell is arranged outside the circuit board.
5. The underground electronic pressure gauge with the oil drainage function according to claim 4, wherein the piston mechanism comprises an electronic expansion block, a piston cylinder, a piston, a return spring and a sliding rod, the electronic expansion block is arranged on the lower end face of the fixed joint and is connected with a circuit board of the pressure detection assembly, a piston cavity is formed between the lower end face of the fixed joint and the piston cylinder, the piston is arranged in the piston cylinder, one end of the sliding rod is connected with the piston, the other end of the sliding rod is connected with the valve core, and the part of the sliding rod, which is positioned in the piston cylinder, is sleeved with the return spring.
6. The underground electronic pressure gauge with the oil drainage function according to claim 5, wherein a pressing cap is arranged on the upper end face of the valve core, a boss is arranged in the shell, an assisting spring is arranged between the upper end face of the boss and the pressing cap, and the lower end face of the boss is abutted against the limiting piece.
7. The underground electronic pressure gauge with the oil drainage function according to claim 6, wherein the limiting piece is a hanging bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110676389.1A CN113202458B (en) | 2021-06-18 | 2021-06-18 | Tail pipe type underground electronic pressure gauge with oil drainage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110676389.1A CN113202458B (en) | 2021-06-18 | 2021-06-18 | Tail pipe type underground electronic pressure gauge with oil drainage function |
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| Publication Number | Publication Date |
|---|---|
| CN113202458A CN113202458A (en) | 2021-08-03 |
| CN113202458B true CN113202458B (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110676389.1A Active CN113202458B (en) | 2021-06-18 | 2021-06-18 | Tail pipe type underground electronic pressure gauge with oil drainage function |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214944210U (en) * | 2021-06-18 | 2021-11-30 | 西安大泽电子科技有限责任公司 | Tail pipe type underground electronic pressure gauge with oil drainage function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2055180U (en) * | 1989-04-30 | 1990-03-28 | 辽河石油勘探局兴隆台采油厂 | Tubular oil drainer |
| US7051812B2 (en) * | 2003-02-19 | 2006-05-30 | Schlumberger Technology Corp. | Fracturing tool having tubing isolation system and method |
| CA2914908C (en) * | 2013-07-25 | 2017-01-17 | Halliburton Energy Services, Inc. | Wellbore isolation devices and methods of use to prevent pump offs |
| CN107165604B (en) * | 2017-07-12 | 2019-07-12 | 天津大港油田石油工程研究院钻采技术开发有限公司 | Liquid-proof fluctuation drainage device and its application method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214944210U (en) * | 2021-06-18 | 2021-11-30 | 西安大泽电子科技有限责任公司 | Tail pipe type underground electronic pressure gauge with oil drainage function |
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| CN113202458A (en) | 2021-08-03 |
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