CN212296345U - Trap type underground television - Google Patents
Trap type underground television Download PDFInfo
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- CN212296345U CN212296345U CN202022157667.6U CN202022157667U CN212296345U CN 212296345 U CN212296345 U CN 212296345U CN 202022157667 U CN202022157667 U CN 202022157667U CN 212296345 U CN212296345 U CN 212296345U
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- rail
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Abstract
The utility model discloses a TV in pit of trap formula, include: connector (16), urceolus (1), trade rail pin (15), group battery (11), memory section (12), camera (10), trade rail inner core (9) and single current valve (14), its characterized in that: the camera (10), the battery pack (11) and the storage part (12) are positioned in the rail changing inner core (9), the camera (10) is positioned in the front of the rail changing inner core (9) and exposes the rail changing inner core (9), the battery pack (11) is positioned between the storage part (12) and the camera (10), the battery pack and the storage part are connected through cables; the connector (16) is positioned at the upper part of the outer cylinder (1), and the check valve (14) is positioned at the lower part of the outer cylinder (1). In the process of shooting at the target position, the trap type underground television of the utility model has no need of smearing the medicament on the lens and is not easy to be polluted; and only the wellbore section to be photographed needs to be replaced with cleaning liquid.
Description
Technical Field
The utility model belongs to energy operation fields such as oil particularly, relate to a trap formula TV in pit, promptly: a downhole television for use in an oil and gas well with tubing strings such as coiled tubing as the transmission medium.
Background
Regardless of operations such as well drilling and completion or well repair in an oil field, various complex and variable conditions occur in a well, such as the conditions and shapes of falling objects, oil pipes, perforation holes and the like in the well, operators cannot see the conditions and shapes, and carry out analysis and judgment by guessing experience and the like, and the operations are undoubtedly a great help if the conditions in the well can be truly presented in front of the eyes.
The problem is well solved in the appearance of TV in the pit, but no matter the well workover stage or the production well stage is bored, muddy and thick greasy dirt etc. all caused adverse effect to shooing in the well, shoot unclear, the camera lens is glued by thick greasy dirt and is become the difficult problem that puzzles the field operation personnel. And as the technology of the horizontal well is more mature and the corresponding quantity is increased continuously, cables or optical fibers and the like cannot enter the horizontal well, and the oil pipe is lowered into the horizontal section by using powered operation equipment such as a continuous oil pipe and a workover rig to perform a series of operations on the horizontal section. The existing underground television with the tubular column belt needs to be driven by a motor, and has the disadvantages of very complex structure, high cost and low reliability.
To the above problem, the utility model provides a trapping formula is TV in pit can reach the purpose on coiled tubing or other tubular columns and shoot the position, its easy operation, the reliability is high. Taking coiled tubing as an example, coiled tubing connects the downhole television and takes it to the desired destination location. The continuous oil pipe can pump cleaning liquid into the continuous flushing camera and replace a section of cleaning shaft through the internal circulation channel, and the camera is extended out or retracted by utilizing water pressure.
Disclosure of Invention
An object of the utility model is to provide a trapping formula is TV in pit, it utilizes coiled tubing as the medium, reachs the target position and shoots.
The purpose of the utility model can be realized through the following technical scheme:
a trap downhole television, comprising: connector, urceolus, trade rail pin, group battery, storage section, camera, trade rail inner core and check valve, its characterized in that: the camera, the battery pack and the storage part are positioned in the rail replacing inner core, the camera is positioned in the front of the rail replacing inner core and exposes out of the rail replacing inner core, the battery pack is positioned between the storage part and the camera, and the storage part, the battery pack and the camera are mutually connected through a cable; the connector is positioned at the upper part of the outer cylinder, and the check valve is positioned at the lower part of the outer cylinder.
Two symmetrical screw thread holes corresponding to the rail replacing pins are formed in the outer wall of the outer barrel, and the rail replacing pins are screwed on the outer barrel through the screw thread holes of the outer barrel. The spring step is arranged in the outer barrel, and the spring is placed on the step. The rail-changing inner core with a camera, a battery pack and a storage part is fixedly propped in the outer barrel through a rail-changing pin and a spring positioned on an inner step of the outer barrel.
A discharge channel is arranged in the wall of the outer cylinder. The drainage channel is an axial water outlet channel in the outer cylinder wall and is communicated with the inside of the outer cylinder through a water inlet hole in the inner wall of the outer cylinder. The fluid inside the outer cylinder flows downwards through the drainage channel. The drainage channels are divided into two groups, and the drainage channels are uniformly distributed at the water outlets at the lower end of the outer cylinder.
The change of pressure can be observed through the ground to determine whether one group or two groups of overflow channels are in a water outlet state, so that the position of the rail changing inner core in the outer barrel is determined, and further the camera is in an extending or retracting state. When the inner core track at the bottom of the rail changing inner core is positioned at the rail changing pin, the camera is retracted inside the outer barrel; when the rail changing inner core moves downwards to the drainage channel 1 group to start drainage, the pressure observed on the ground is reduced, the junction of the middle inner core track and the upper inner core track of the rail changing inner core is positioned at the rail changing pin, and the camera also extends into the shaft; when the rail changing inner core continues to move downwards to the discharge channel 2 group for discharging, the pressure observed on the ground is reduced again, and the inner core rail on the upper portion of the rail changing inner core is located at the rail changing pin. After the pump is stopped, the rail replacing inner core is jacked up by the spring, the inner core rail in the middle of the rail replacing inner core is clamped at the rail replacing pin, the sealing ring of the rail replacing inner core is positioned between the drainage channel 1 group and the drainage channel 2 group, and the camera extends into the shaft.
The connector is connected with the outer cylinder through threads, and then the outer cylinder is connected with the coiled tubing through the connector. The lower end of the outer cylinder is connected with the check valve through threads. The check valve enables liquid in the outer barrel to flow outwards, and external liquid cannot enter, so that the camera is protected.
The rail replacing pins are symmetrically arranged, usually two, and are used as the constraint of rail replacing inner cores for rail replacement.
The outer wall of the rail-changing inner core is of a J-shaped groove structure, and the camera can extend out and retract through rail changing. The upper end of the outer wall of the rail replacing inner core is provided with a sealing ring. The rail changing inner core consists of an upper rail changing part and a lower fastening part, and the two parts are connected through threads and used for fastening the battery pack, the storage part and the camera which are positioned in the rail changing inner core. The upper rail replacing part consists of a bottom inner core rail, a middle inner core rail and an upper inner core rail, and the rail replacing inner core is positioned at a required position in the outer barrel through a stationary rail replacing pin clamped on the outer wall of the outer barrel. The bottom inner core tracks of the rail-changing inner cores are two in symmetry, the middle inner core tracks are two in symmetry, and the upper inner core tracks are four in circumference uniform distribution.
The camera is used for shooting conditions in the well; the battery pack is used for providing power and illumination for the camera; the storage part is used for storing images shot by the camera, and the storage part, the camera and the storage part are connected through a cable to transmit signals and provide electric energy.
The utility model discloses a TV equipment process in pit of trap formula is as follows: screwing off an upper rail replacing part and a lower fastening part of the rail replacing inner core, connecting and assembling the battery pack, the storage part and the camera together, then integrally placing the battery pack, the storage part and the camera into the upper rail replacing part of the rail replacing inner core, screwing off the lower fastening part of the rail replacing inner core, and fastening the battery pack, the storage part and the camera into the rail replacing inner core; then, a connector connected to the outer barrel is unscrewed, the spring is firstly placed on a step inside the outer barrel, then a rail replacing inner core with a camera, a battery pack and a storage part is placed, the rail replacing inner core is pressed downwards from the outside, the spring is further compressed, a bottom inner core track is aligned to a screw thread hole of a rail replacing pin on the outer wall of the outer barrel, then the two rail replacing pins are screwed, external pressure is removed, the spring rebounds, and the bottom inner core track is clamped at the rail replacing pin. And finally, connecting the single-flow valve with the lower end of the outer barrel through threads.
The utility model discloses a trap formula TV in pit has's advantage lies in: firstly, the camera of the traditional underground television needs to be coated with chemical agents, so that the lens is not stained by oil stains in the well, but the chemical agents are very expensive and have timeliness, and once the chemical agents fail, the lens is very easy to be stained. In the process of descending the trap type television of the utility model, the single flow valve prevents oil stains in the internal organs of the well from entering the internal stain-binding camera; after the target position is reached, the pump is started to pump cleaning liquid through the coiled tubing channel, the camera is pressed out by hydraulic pressure, and the camera is always washed by the cleaning liquid and cannot be adhered to the visceral oil stain of the dirty well. On the other hand, the traditional underground television needs to replace the whole shaft with cleaning liquid before going into the well, and the trap type underground television of the utility model only needs to replace the section of the shaft to be shot with the cleaning liquid; and the underground television is protected by hydraulic expansion and check valves and can be used in an infinite way theoretically, so that the use of a pump truck and the use amount of cleaning liquid are greatly saved.
Drawings
Fig. 1 is a schematic structural view of an outer barrel of a trap type downhole tv according to the present invention, wherein fig. a is a left side view, B is a front view, c is a sectional view taken along a-a direction in fig. a, d is a partially enlarged view of a circled portion in fig. c, and e is a sectional view taken along B-B direction in fig. a.
Fig. 2 is a schematic structural diagram of the rail-changing inner core of the trap type underground television of the present invention, wherein, fig. a is an oblique view, and fig. b is an oblique view turned by 135 ° along fig. a.
Fig. 3 is a schematic diagram of the overall structure of the trap type downhole tv of the present invention, wherein fig. a is a front view, and fig. b is a cross-sectional view along a-a direction in fig. a.
Description of the reference numerals
1. An outer cylinder; 2. thread eyelets; 3. a group of drainage channels 1; 4. a group of discharge channels 2; 5. a seal ring; 6. a bottom core rail; 7. a middle core rail; 8. a top inner core rail; 9. replacing the rail inner core; 10. a camera; 11. a battery pack; 12. a storage section; 13. a spring; 14. a check valve; 15. rail replacing pins; 16. a connector; 17. a rail replacing part of the rail replacing inner core; 18. trade rail inner core fastening part.
Detailed Description
The device of the present invention will be described in further detail by way of example with reference to the accompanying fig. 1-3.
Example 1:
a trap downhole television, comprising: the rail replacing device comprises an outer barrel 1, a rail replacing pin 15, a battery pack 11, a storage part 12, a camera 10, a rail replacing inner core 9 and a check valve 14.
The utility model discloses a device operation process as follows:
after the trap type underground television is assembled, the trap type underground television is connected with the coiled tubing through the connector. Then pumping cleaning liquid to test whether the trap type underground television extends out and retracts normally.
And after the test is finished, the coiled tubing enters the well with the trap type underground television. After the target depth is reached, according to the preset pressure value of a spring between the outer barrel and the rail changing inner core, liquid with corresponding discharge capacity is pumped into the coiled tubing through the interior of the coiled tubing to generate corresponding pressure to push the rail changing inner core to move downwards to extrude the spring, due to the constraint of the rail changing pin, the track of the rail changing inner core moves downwards along the rail changing pin from the bottom inner core track, when a sealing ring of the rail changing inner core passes through the drainage channel 1 group, the liquid flows outwards along the drainage channel 1 group, the pressure is suddenly reduced when the ground observes, at the moment, the junction of the middle inner core track and the upper inner core track of the rail changing inner core is positioned at the rail changing pin, the camera also extends out of the shaft, and the uniflow valve is pushed open in the drainage channel and the camera extending process; at the moment, the rail changing inner core continues to be pressed by water pressure to move downwards, when the rail changing inner core reaches the upper inner core track, the rail changing inner core sealing ring just passes through the drainage channel 2 group, and the pressure is further reduced when the ground observes.
When the camera extends into the shaft in the largest distance, the rail changing inner core cannot move downwards any more because the rail changing pin is propped against the upper inner core rail. Continuing to pump cleaning liquid until the captured turbid surrounding well fluid is replaced with cleaning liquid; after the pump is stopped, the rail of the inner core in the middle of the rail changing inner core is propped against the rail changing pin because of the elasticity of the spring and the J-shaped special rail constraint, so that the rail changing inner core cannot be propped up by the spring to move upwards, the camera retracts for a certain distance at the moment, but is still in an extending state, the sealing ring of the rail changing inner core is positioned between the drainage channel 1 group and the drainage channel 2 group, and the picture shot by the camera is clear and is stored in the storage part at the moment.
After shooting is finished, the pump is started again to pump liquid with corresponding discharge capacity, corresponding pressure is generated, the rail changing inner core is pushed to move downwards, the spring is extruded, when a sealing ring of the rail changing inner core passes through the drainage channel 2 group, the inner core rail at the top of the rail changing inner core also reaches the rail changing pin, after the pump is stopped, the inner core rail at the bottom of the rail changing inner core moves to the rail changing pin due to the elastic force of the spring and J-shaped special rail constraint, at the moment, the rail changing inner core retracts, and the check valve is closed.
And lifting or lowering the coiled tubing to enable the trap type underground television to reach a second shooting position, and repeating the processes of extending the camera, replacing the cleaning liquid and retracting the camera to shoot. The third and fourth … … images are shot repeatedly until the shooting is finished.
If the state of the camera cannot be known or forgotten, the liquid can be pumped, and the pressure sudden change times can be observed to determine whether the camera extends or retracts, wherein the pressure sudden drop twice is an extending process, and the pressure sudden drop once is a retracting process.
Claims (9)
1. A trap downhole television, comprising: connector (16), urceolus (1), trade rail pin (15), group battery (11), memory section (12), camera (10), trade rail inner core (9) and single current valve (14), its characterized in that: the camera (10), the battery pack (11) and the storage part (12) are positioned in the rail changing inner core (9), the camera (10) is positioned in the front of the rail changing inner core (9) and exposes the rail changing inner core (9), the battery pack (11) is positioned between the storage part (12) and the camera (10), the battery pack and the storage part are connected through cables; the connector (16) is positioned at the upper part of the outer cylinder (1), and the check valve (14) is positioned at the lower part of the outer cylinder (1).
2. The trap downhole television of claim 1, wherein: the outer wall of the outer barrel (1) is provided with symmetrical screw thread holes (2) corresponding to the rail replacing pins (15), and the rail replacing pins (15) are screwed on the outer barrel (1) through the screw thread holes.
3. The trap downhole television of claim 1, wherein: and a drainage channel is arranged in the wall of the outer cylinder.
4. The trap downhole television of claim 3, wherein: the drainage channels are divided into two groups.
5. The trap downhole television of claim 1, wherein: the spring step is arranged in the outer barrel, and the spring is placed on the step.
6. The trap downhole television of claim 1, wherein: the rail-changing inner core (9) consists of an upper rail-changing part (17) and a lower fastening part (18).
7. The trap downhole television of claim 6, wherein: the upper rail changing part consists of a bottom inner core rail (6), a middle inner core rail (7) and an upper inner core rail (8).
8. The trap downhole television of claim 7, wherein: the bottom inner core tracks (6) of the rail-changing inner core are two in symmetry, the middle inner core tracks (7) are two in symmetry, and the upper inner core tracks (8) are four in circumference uniform distribution.
9. The trap downhole television of claim 1, wherein: the outer wall of the rail replacing inner core (9) is of a J-shaped groove structure, and the upper end of the outer wall is provided with a sealing ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022157667.6U CN212296345U (en) | 2020-09-27 | 2020-09-27 | Trap type underground television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022157667.6U CN212296345U (en) | 2020-09-27 | 2020-09-27 | Trap type underground television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212296345U true CN212296345U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022157667.6U Active CN212296345U (en) | 2020-09-27 | 2020-09-27 | Trap type underground television |
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| Country | Link |
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| CN (1) | CN212296345U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682027A (en) * | 2021-01-06 | 2021-04-20 | 中国石油天然气股份有限公司 | Horizontal well visual real-time monitoring oil-water distribution testing system and method |
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2020
- 2020-09-27 CN CN202022157667.6U patent/CN212296345U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682027A (en) * | 2021-01-06 | 2021-04-20 | 中国石油天然气股份有限公司 | Horizontal well visual real-time monitoring oil-water distribution testing system and method |
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