CN112901138A - Sleeve air-tight seal detection device - Google Patents
Sleeve air-tight seal detection device Download PDFInfo
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- CN112901138A CN112901138A CN201911123844.4A CN201911123844A CN112901138A CN 112901138 A CN112901138 A CN 112901138A CN 201911123844 A CN201911123844 A CN 201911123844A CN 112901138 A CN112901138 A CN 112901138A
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- sleeve
- piston
- mandrel
- outer cylinder
- limiting part
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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
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
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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)
Abstract
The invention relates to the technical field of petroleum and natural gas development detection tools, in particular to a casing gas seal detection device. The device comprises a detection tool, wherein the detection tool comprises a mandrel, a lock sleeve, a rubber cylinder, a piston sleeve and a piston outer cylinder; the middle part of the mandrel is provided with a first limiting part, and two sides of the first limiting part are sequentially and symmetrically sleeved with a piston outer cylinder, a piston sleeve, a rubber cylinder and a lock sleeve; one end of the piston outer cylinder is in sealing fit with the first limiting part, the other end of the piston outer cylinder is in sliding splicing fit with the piston sleeve, a second limiting part is arranged outside the piston sleeve, the second limiting part is in limiting fit with the piston outer cylinder, a hollow part is left among the piston sleeve, the piston outer cylinder and the mandrel, one end of the rubber cylinder is in limiting fit with the lock sleeve, and the other end of the rubber cylinder is in sealing splicing fit with the piston sleeve; a channel is formed in the mandrel, one end of the channel is positioned at the upper end of the mandrel and is communicated with the outside, and the other end of the channel is communicated with the annular part; the piston sleeve is in sliding fit with the mandrel. The invention has simple structure and high detection reliability.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas development detection tools, in particular to a casing gas seal detection device.
Background
In the process of oil and gas well casing, the air-tight detection of the connecting screw thread is a necessary means for ensuring the integrity of the whole production casing string. Because the field detection means is limited, the current inspection of the well conveying casing is limited to the damage conditions of the steel grade, the wall thickness, the inner diameter, the outer diameter, the drift diameter, the length and the obvious appearance of the casing, and the damage conditions of some hidden casing screw threads cannot be effectively judged.
Disclosure of Invention
The invention aims to provide a device for detecting air tightness of pipe walls, connecting screw threads and other parts of an oil pipe, which has a simple structure, is matched with the existing well repair equipment for use and is convenient for well repair field operation, and particularly provides a sleeve air tightness detection device.
The technical scheme is as follows:
the sleeve air-tight seal detection device comprises a detection tool, wherein the detection tool comprises a mandrel, a lock sleeve, a rubber sleeve, a piston sleeve and a piston outer cylinder; the middle part of the mandrel is provided with a first limiting part, and two sides of the first limiting part are sequentially and symmetrically sleeved with a piston outer cylinder, a piston sleeve, a rubber cylinder and a lock sleeve; one end of the piston outer cylinder is in sealing fit with the first limiting part, the other end of the piston outer cylinder is in sliding splicing fit with the piston sleeve, a second limiting part is arranged outside the piston sleeve, the second limiting part is in limiting fit with the piston outer cylinder, a hollow part is left among the piston sleeve, the piston outer cylinder and the mandrel, one end of the rubber cylinder is in limiting fit with the lock sleeve, and the other end of the rubber cylinder is in sealing splicing fit with the piston sleeve; a channel is formed in the mandrel, one end of the channel is positioned at the upper end of the mandrel and is communicated with the outside, and the other end of the channel is communicated with the annular part; the piston sleeve is in sliding fit with the mandrel.
Furthermore, the middle part of the rubber sleeve is provided with a third limiting part, and a support ring is sleeved between the third limiting part and the piston sleeve.
Furthermore, a connecting sleeve is fixedly sleeved at the upper end of the mandrel.
Furthermore, the connecting sleeve is in threaded connection with a lifting head.
The device comprises a detection tool, a gas collecting pipe, a leak detector and a suction gun, wherein the detection tool is matched with the gas collecting pipe, the gas collecting pipe is sleeved on the outer wall of a sleeve to be detected, the suction gun is communicated with the gas collecting pipe, and the leak detector is communicated with the gas collecting pipe through the suction gun.
The device further comprises power equipment, a winch and a support, wherein the power equipment comprises a high-pressure air port and an electric power port, the electric power port is electrically connected with the winch, the high-pressure air port is communicated with the channel through a pipeline, the winch suspends the detection tool on the support in a hanging mode, and the detection tool is located above the sleeve to be detected.
Further, the power equipment also comprises an air source and a supercharging device communicated with the air source, wherein the supercharging device is communicated with the high-pressure air port.
Furthermore, an energy accumulator is communicated between the supercharging device and the high-pressure air port.
The invention has the beneficial effects that:
the casing pipes are detected one by one in the process of casing pipe descending of the oil gas well, the good sealing performance of the casing pipe connecting part is ensured, and the safety and the effectiveness of subsequent work are ensured.
Drawings
FIG. 1 is a schematic structural view of the upper half of a detection tool;
FIG. 2 is a schematic view of the structure of the lower half of the inspection tool;
FIG. 3 is a schematic view of the third embodiment;
FIG. 4 is a flow diagram of a valve box process control port;
FIG. 5 is a schematic diagram of a valve box high pressure gas system;
in the figure: 1. a lift head; 2. connecting sleeves; 3. locking a sleeve; 4. gluing a rubber cylinder; 5. a third limiting part; 6. an upper support ring; 7. an upper piston sleeve; 8. a second limiting part 9, an upper piston outer cylinder; 10. a first annulus; 11. a channel; 12. a mandrel; 13. the device comprises power equipment, 14, a winch, 15, a gas cylinder, 16, a leak detector, 17, a suction gun, 18, a detection tool, 19, a sleeve, 20, a gas collecting pipe, 21, a support, 22 and a lower connector; 33. a lower lock sleeve; 44. a lower rubber cylinder 66, a lower support ring 77, a lower piston sleeve 1010, a second annular space 99 and a lower piston outer cylinder.
Detailed Description
The first embodiment is as follows:
referring to fig. 1, a casing hermetic seal detection device includes a detection tool, wherein the detection tool includes a mandrel, a lock sleeve, a rubber cylinder, a piston sleeve, and a piston outer cylinder; the middle part of the mandrel is provided with a first limiting part, and two sides of the first limiting part are sequentially and symmetrically sleeved with a piston outer cylinder, a piston sleeve, a rubber cylinder and a lock sleeve; one end of the piston outer cylinder is in sealing fit with the first limiting part, the other end of the piston outer cylinder is in sliding splicing fit with the piston sleeve, a second limiting part is arranged outside the piston sleeve, the second limiting part is in limiting fit with the piston outer cylinder, a hollow part is left among the piston sleeve, the piston outer cylinder and the mandrel, one end of the rubber cylinder is in limiting fit with the lock sleeve, and the other end of the rubber cylinder is in sealing splicing fit with the piston sleeve; a channel is formed in the mandrel, one end of the channel is positioned at the upper end of the mandrel and is communicated with the outside, and the other end of the channel is communicated with the annular part; the piston sleeve is in sliding fit with the mandrel.
The middle part of the rubber sleeve is provided with a third limiting part, a support ring is sleeved between the third limiting part and the piston sleeve, a connecting sleeve is fixedly sleeved at the upper end of the mandrel, and the connecting sleeve is in threaded connection with a lifting head.
Example two:
referring to fig. 2, the device for detecting the hermetic seal of the casing further includes a gas collecting tube, a leak detector, a suction gun, a power device, a winch, and a bracket used in cooperation with the detection tool.
The gas collecting pipe sleeve is arranged on the outer wall of the sleeve to be detected, the suction gun is communicated with the gas collecting pipe, the leak detector is communicated with the gas collecting pipe through the suction gun, the power equipment comprises a high-pressure gas port and an electric power port, the electric power port is electrically connected with a winch, the high-pressure gas port is communicated with the channel through a pipeline, the winch suspends the detection tool on the support, the detection tool is located above the sleeve to be detected, the power equipment further comprises a gas source and a pressurizing device communicated with the gas source, the pressurizing device is communicated with the high-pressure gas port, and an energy accumulator is further communicated between the pressurizing device and the high-pressure gas port.
Example three:
a casing gas seal detection tool comprises a detection tool, power equipment, an energy accumulator, a winch and a leak detector.
The detection tool comprises an upper packer and a lower packer, when the detection tool is detected, the tool is lowered to a proper position, a winch valve is adjusted, high-pressure fluid enters the detection tool from a high-pressure pipeline, the high-pressure fluid pushes the sliding sleeve to move towards two ends respectively, a packer rubber sleeve seat is extruded, and the detection tool and the oil sleeve form an annular space. And continuously pressurizing, and starting to detect the pressure reaching the design pressure.
The power equipment is mainly used for providing construction power and comprises a high-pressure pump, a liquid pump and the like.
The winch is used for controlling the detection tool to enter and exit the casing and controlling the pressurization and pressure relief procedures. One of the major features of the hermetic seal detection control system is to control high pressure fluid by low pressure gas in order to reduce safety risks.
The leak detector is mainly used for detecting the leakage rate of helium and judging whether the tightness of the screw thread of the casing pipe connection is qualified or not according to the detected helium leakage rate. And (4) judging the standard: if the helium leakage rate is detected to be greater than or equal to 1.0 x 10-7 mbar.L/s (1 mbar =0.01 MPa), the pipe column connecting screw thread is unqualified; if the helium leakage rate is detected to be less than 1.0 x 10-7 mbar.L/s, the pipe column connection thread is qualified. The reaction time is less than 0.7s, and the judgment can be effectively made in the construction site. The detector is matched with a recorder, and is used for synchronously displaying and collecting the detection pressure and the leakage rate and outputting a detection report.
The energy accumulator utilizes a high-pressure source of power equipment to pressurize nitrogen-helium mixed gas entering the energy accumulator, is processed by a manufacturer with the design and manufacturing qualification of an ultrahigh-pressure container, and periodically performs third-party detection every year according to the requirements of an oil field. The maximum rated working pressure is 140 Mpa.
The power equipment is provided with a valve box, nitrogen and helium are respectively injected into the valve box, and are mixed in a specified proportion in the valve box and then are conveyed into the energy accumulator through the valve box, so that the energy accumulator is filled with mixed gas of the nitrogen and the helium. And the ultrahigh-pressure electric pump is used for injecting high-pressure water into the energy accumulator to boost the mixed gas in the energy accumulator. Finally, the on-site process control port controls the input and output of high-pressure gas in the detection tool, and helium detection is carried out on the joints of the casings to confirm the tightness of each casing.
Claims (8)
1. The sleeve air-tight seal detection device is characterized by comprising a detection tool, wherein the detection tool comprises a mandrel, a lock sleeve, a rubber sleeve, a piston sleeve and a piston outer cylinder; the middle part of the mandrel is provided with a first limiting part, and two sides of the first limiting part are sequentially and symmetrically sleeved with a piston outer cylinder, a piston sleeve, a rubber cylinder and a lock sleeve; one end of the piston outer cylinder is in sealing fit with the first limiting part, the other end of the piston outer cylinder is in sliding splicing fit with the piston sleeve, a second limiting part is arranged outside the piston sleeve, the second limiting part is in limiting fit with the piston outer cylinder, a hollow part is left among the piston sleeve, the piston outer cylinder and the mandrel, one end of the rubber cylinder is in limiting fit with the lock sleeve, and the other end of the rubber cylinder is in sealing splicing fit with the piston sleeve; a channel is formed in the mandrel, one end of the channel is positioned at the upper end of the mandrel and is communicated with the outside, and the other end of the channel is communicated with the annular part; the piston sleeve is in sliding fit with the mandrel.
2. The sleeve hermetic seal detection device according to claim 1, wherein a third limiting part is arranged in the middle of the rubber sleeve, and a support ring is sleeved between the third limiting part and the piston sleeve.
3. The apparatus for detecting casing hermetic seal according to claim 2, wherein the upper end of the mandrel is fixedly sleeved with a connecting sleeve.
4. The bushing hermetic seal detection apparatus according to claim 3, wherein the connection sleeve is threadedly connected with a lifting head.
5. The bushing hermetic seal detection device according to any one of claims 1 to 4, further comprising a gas collecting pipe, a leak detector and a suction gun, wherein the gas collecting pipe is sleeved on the outer wall of the bushing to be detected, the suction gun is communicated with the gas collecting pipe, and the leak detector is communicated with the gas collecting pipe through the suction gun.
6. The casing gas seal detection device according to claim 5, further comprising a power device, a winch and a support, wherein the power device comprises a high-pressure gas port and a power port, the power port is electrically connected with the winch, the high-pressure gas port is communicated with the channel through a pipeline, the winch suspends the detection tool on the support, and the detection tool is located above the casing to be detected.
7. The cannula gas seal detection device of claim 6, wherein the power plant further comprises a gas source, a pressure boosting device in communication with the gas source, the pressure boosting device in communication with the high pressure gas port.
8. The casing gas seal detection device according to claim 7, characterized in that an accumulator is further communicated between the pressurization device and the high-pressure gas port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123844.4A CN112901138A (en) | 2019-11-17 | 2019-11-17 | Sleeve air-tight seal detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911123844.4A CN112901138A (en) | 2019-11-17 | 2019-11-17 | Sleeve air-tight seal detection device |
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| CN112901138A true CN112901138A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911123844.4A Pending CN112901138A (en) | 2019-11-17 | 2019-11-17 | Sleeve air-tight seal detection device |
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| CN103234712A (en) * | 2012-12-29 | 2013-08-07 | 西南石油大学 | Oil bushing air-tightness detection device and oil bushing air-tightness detection method |
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| CN110206495A (en) * | 2019-06-04 | 2019-09-06 | 西南石油大学 | A kind of tubing and casing screwed connection air-leakage test packer |
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2019
- 2019-11-17 CN CN201911123844.4A patent/CN112901138A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202946094U (en) * | 2012-12-03 | 2013-05-22 | 中国石油集团渤海钻探工程有限公司 | Double-power-source packer for air-tight seal detection of oil sleeve |
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| CN103216209A (en) * | 2013-04-01 | 2013-07-24 | 中国海洋石油总公司 | Pipe interior packer for detecting sealing property of oil sleeve |
| CN203347786U (en) * | 2013-07-23 | 2013-12-18 | 大庆市永晨石油科技有限公司 | Air-tight seal detection device of well head oil casing pipe |
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