CN112211586A - Electrically controlled self-walking packer for horizontal well - Google Patents
Electrically controlled self-walking packer for horizontal well Download PDFInfo
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- CN112211586A CN112211586A CN202011215338.0A CN202011215338A CN112211586A CN 112211586 A CN112211586 A CN 112211586A CN 202011215338 A CN202011215338 A CN 202011215338A CN 112211586 A CN112211586 A CN 112211586A
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- 230000009193 crawling Effects 0.000 claims abstract description 76
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 11
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000012856 packing Methods 0.000 description 6
- 230000008054 signal transmission Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
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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
- 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
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of oil extraction, and particularly provides an electric control self-walking packer for a horizontal well, which comprises a cable, a centralizer, an oil bag, a setting mechanism, a rubber barrel, a crawling mechanism and a guide head, wherein the cable, the centralizer, the oil bag, the setting mechanism, the rubber barrel, the crawling mechanism and the guide head are sequentially connected from left to right, so that the problems that the conventional packer is limited in repeated setting and sealing times, the setting and unsealing force is difficult to accurately control, the safety fault of a downhole tubular column is easy to cause, and the conventional packer needs to be matched with a well repairing power device during adjustment, the operation process is complex, the cost is high, and the operation safety risk is caused are solved, the remote electric control position adjustment and the repeated setting and unsealing of the packer at any position of the horizontal well shaft are realized, the power devices such as a well repairing operation vehicle and the like are required during the integral dragging of a process tubular column are omitted, the operation flow is simplified, and the safety performance of the underground operation is improved.
Description
Technical Field
The invention belongs to the technical field of oil extraction, and particularly relates to an electric control self-walking packer for a horizontal well.
Background
The packer is the most common downhole tool for the operation of the oil-water well shaft, and mainly has the functions of realizing the separation of annular spaces among oil casings at different well section positions of the shaft and further realizing the operation of layered oil extraction, water injection and related measures of the oil-water well. Aiming at a horizontal well, due to the special structural form of a horizontal well section, higher technical requirements are put forward on the performance of a packer, for example, lower setting and deblocking force is needed to ensure that a process pipe column can be safely pulled out and put down for operation. When the horizontal well is in special operation (segmented production test operation), multiple times of blocking and sealing are often needed to be carried out on different intervals, but the application of the conventional packer in the horizontal well segment has prominent problems or defects in two aspects: the conventional packer is generally used for lifting and lowering a pipe column or hydraulically setting, the repeated setting times are limited, and the setting and unsetting force is difficult to accurately control due to the complex underground condition, so that the safety fault of the underground pipe column is easily caused; and secondly, the packer is mainly conveyed by connecting a tubing string and conveyed to a set position of a shaft, when the setting position of the packer needs to be adjusted, a well repairing power device needs to be matched to drag the whole string, the operation process is complex, the cost is high, and the operation safety risk exists.
Aiming at the main problems of the conventional packer in the aspect of horizontal well shaft operation, the self-walking packer which is not limited by a process pipe column in a horizontal well section, can be repeatedly set and unset for many times and can freely adjust the position of the packer as required is needed to be invented, and has great significance for various measure operations and tests of the horizontal well shaft. Relevant documents and patent documents are searched, and no relevant case report of the packer device with the functions is found at present.
Disclosure of Invention
The invention provides an electric control self-walking packer for a horizontal well, aiming at overcoming the problems that in the prior art, the conventional packer is limited in repeated setting times by lifting and lowering a pipe column or hydraulically setting, and the safety fault of the pipe column in the well is easily caused because the underground condition is complex and the setting and unsetting force is difficult to accurately control; the packer is mainly conveyed in a mode of being connected with a tubing string and conveyed to a set position of a shaft, when the setting position of the packer needs to be adjusted, a well repairing power device needs to be matched to drag the whole string, the operation process is complex, the cost is high, and the operation safety risk problem exists.
Therefore, the invention provides an electric control self-walking packer for a horizontal well, which comprises a cable, a centralizer, an oil bag, a setting mechanism, a rubber cylinder, a crawling mechanism and a guide head, wherein the cable, the centralizer, the oil bag, the setting mechanism, the rubber cylinder, the crawling mechanism and the guide head are sequentially connected from left to right.
The cable is an armored cable.
The cable centralizer is characterized by further comprising a cable connector, and the cable is connected with the centralizer through the cable connector.
The centralizer is a roller centralizer.
The roller centralizer comprises a centralizer body and a plurality of direction rolling wheels, the direction rolling wheels are distributed in the circumferential direction at equal intervals and are connected to the outside of the centralizer body, and the direction rolling wheels roll along the axial direction of a shaft.
Still include the protection outer tube, the protection outer tube cup joints in the outside of oil bag and setting mechanism.
The setting mechanism comprises a setting motor, a setting pump, a one-way valve, a pressure relief valve and an internal and external pressure sensor for monitoring the packer, the setting motor is respectively connected with an inlet of the setting pump, an inlet of the pressure relief valve and the internal and external pressure sensor for monitoring the packer, an outlet of the setting pump is connected with a rubber barrel through the one-way valve, an outlet of the pressure relief valve is connected with the rubber barrel, and the setting pump is connected with an oil bag.
The mechanism of crawling is including the body of crawling, the motor of crawling, the controlling means of crawling, the arm of crawling, and the quantity of the arm of crawling is a plurality of, a plurality of arms of crawling of the external connection of the body of crawling, the internal connection of the body of crawling motor and the controlling means of crawling, and the controlling means of crawling is through the motor connection arm of crawling.
The guide head is a conical guide mechanism.
The invention has the beneficial effects that: according to the electric control self-walking packer for the horizontal well, power supply and signal transmission of the electric control self-walking packer are realized through cables; the crawling control device controls the crawling arm to crawl and walk along the horizontal well shaft through a crawling motor, and self-walking of the electric control self-walking packer at the position of the horizontal well shaft is achieved; the crawling position of the crawling mechanism is determined through the guide head, and the accurate positioning of the electric control self-walking packer in the horizontal well is realized; the repeated setting and unsetting of the electric control self-walking packer at any position are realized through the setting mechanism; compared with a conventional packer for operation and test of a horizontal well shaft, the electric control self-walking packer can realize repeated packing and unpacking at any position of the horizontal well section shaft; in the packer conveying mode, the technical limit of conventional oil pipe conveying is broken through, when the position of the packer in a shaft is adjusted, power devices such as a well repairing operation vehicle which must be matched when a process pipe column is integrally dragged are omitted, the operation flow is simplified, the operation and matching cost can be greatly reduced, and the safety performance of underground operation is improved.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of an electric control self-walking packer of a horizontal well.
Description of reference numerals: 1. a cable; 2. a cable joint; 3. a centralizer; 4. an oil pocket; 5. a protective outer tube; 6. a setting mechanism; 7. a direction rolling wheel; 8. a crawling mechanism; 9. a guide head; 10. a sleeve; 3-1, a centralizer body; 3-2, a direction rolling wheel; 8-1, crawling the body; 8-2, a crawling arm.
Detailed Description
Example 1:
as shown in figure 1, the horizontal well electric control self-walking packer comprises a cable 1, a centralizer 3, an oil bag 4, a setting mechanism 6, a rubber cylinder 7, a crawling mechanism 8 and a guiding head 9, wherein the cable 1, the centralizer 3, the oil bag 4, the setting mechanism 6, the rubber cylinder 7, the crawling mechanism 8 and the guiding head 9 are sequentially connected from left to right.
The power supply and the signal transmission of the electric control self-walking packer are realized through the cable 1; the creeping mechanism 8 is used for realizing the self-walking of the electric control self-walking packer at the position of the horizontal well shaft; the crawling position of the crawling mechanism is determined through the guide head 9, and the accurate positioning of the electric control self-walking packer in the horizontal well is realized; the repeated setting and unsetting of the electric control self-walking packer at any position are realized through the setting mechanism 6; compared with a conventional packer for operation and test of a horizontal well shaft, the electric control self-walking packer can realize repeated packing and unpacking at any position of the horizontal well section shaft; in the packer conveying mode, the technical limit of conventional oil pipe conveying is broken through, when the position of the packer in a shaft is adjusted, power devices such as a well repairing operation vehicle which must be matched when a process pipe column is integrally dragged are omitted, the operation flow is simplified, the operation and matching cost can be greatly reduced, and the safety performance of underground operation is improved.
Example 2:
on the basis of the embodiment 1, further, the cable 1 is an armored cable. The cable 1 is connected with a wellhead power supply and is mainly responsible for supplying power to the electric control self-walking packer, and is also a control signal transmission channel of the electric control self-walking packer, and the electric control self-walking packer is controlled by actions such as walking, packing, unpacking and the like through ground remote electric control; the armored cable can be well adapted to the environment of a horizontal well, external clamping, pressing, collision and the like are prevented, the waterproofness is good, the stability of power supply and signal transmission performance of the electric control self-walking packer is well guaranteed, the adaptability is high, and the service life is prolonged.
Further, the cable joint 2 is included, and the cable 1 is connected with the centralizer 3 through the cable joint 2. The armored cable is connected with the horizontal well electric control self-walking packer through a cable joint, and the packer is conveyed to the underground through the armored cable; the cable joint 2 is used for locking and fixing the cable 1, plays a role in water resistance, dust resistance and vibration resistance, ensures the stability of cable power supply and signal transmission, and prolongs the service life of the cable.
Example 3:
on the basis of embodiment 2, the centralizer 3 is a roller centralizer. The centralizer 3 mainly guarantees that automatically controlled self-propelled packer is axially placed in the middle in the horizontal well casing, adopts the gyro wheel design simultaneously, realizes that automatically controlled self-propelled packer reduces frictional resistance at the intraductal reciprocating motion in-process of sleeve.
The roller bearing of the further roller centralizer is provided with an elastic mechanism which is of an existing structure, the elastic mechanism can adopt the existing structures such as springs and the like, the installation is selected according to actual needs, the structure of the elastic mechanism is not described in detail, and when the elastic mechanism meets the conditions such as sundries or scales on the inner wall of a sleeve, the obstacle crossing can be achieved to a certain degree, and the self-walking adaptability of the electric control self-walking packer is improved.
The roller centralizer comprises a centralizer body 3-1 and a plurality of direction rolling wheels 3-2, the direction rolling wheels 3-2 are distributed and connected to the outside of the centralizer body 3-1 in a circumferential and equidistant mode, and the direction rolling wheels 3-2 roll along the axial direction of a shaft. The reduction of the frictional resistance in the reciprocating walking process of the packer in the sleeve is realized; the self-walking adaptability of the packer is improved.
Furthermore, the number of the direction rolling wheels 3-2 is 4, the 4 direction rolling wheels 3-2 are circumferentially distributed outside the centralizer body 3-1 at equal intervals, and the structure improves the walking stability and lightens the automation to the maximum when realizing the reciprocating walking capability of the packer in the casing.
Example 4:
on the basis of embodiment 3, the oil bag further comprises a protective outer pipe 5, and the protective outer pipe 5 is sleeved outside the oil bag 4 and the setting mechanism 6. The protective outer tube 5 protects the inner oil bladder 4 and the setting mechanism 6 from external mechanical damage during the packer running in the well.
Furthermore, the protective outer tube 5 is cylindrical, simple in cylindrical structure, practical and attractive, and the packer can conveniently walk in the sleeve.
Further, set up and seal mechanism 6 including setting motor, setting pump, check valve, relief valve and monitoring packer inside and outside pressure sensor, set up the motor and connect the entry of setting pump, the entry of relief valve and monitoring packer inside and outside pressure sensor respectively, set up the pump export and pass through check valve and connect packing element 7, relief valve exit linkage packing element 7, set up the pump and connect oil bag 4. The oil bag 4 is a setting oil storage cavity and provides setting oil for a setting pump when the packer is set; when a packer setting motor receives a ground setting signal instruction, the setting motor operates to drive a setting pump to work, the setting pump injects setting oil into a rubber cylinder through a one-way valve to realize pressing setting, a sensor for monitoring the internal and external pressures of the packer measures the pressure, when the pressure difference reaches a set value, the setting motor stops working, and the setting of the packer is finished; when the packer is unpacked, the setting motor is electrified with negative electricity, the pressure relief valve is opened, and the pressure in the packer rubber cylinder is reduced and the packer is unpacked; the rubber sleeve 7 is a unit for realizing shaft separation after the packer is set; when the pressure in the rubber sleeve rises, the rubber sleeve expands outwards to seal the annulus between the casing and the packer; when the pressure in the rubber sleeve is reduced, the rubber sleeve contracts inwards, and the annular space between the sleeve and the packer is communicated; the repeated setting and deblocking of the packer at any position of the horizontal shaft can be realized by repeating the actions, and an effective packing mode and a tool are provided for special operation and test in the horizontal shaft.
Further, the crawling mechanism 8 comprises a crawling body 8-1, a crawling motor, a crawling control device and crawling arms 8-2, the number of the crawling arms 8-2 is multiple, the crawling arms 8-2 are connected to the outside of the crawling body 8-1, the crawling motor and the crawling control device are connected to the inside of the crawling body 8-1, and the crawling control device is connected with the crawling arms 8-2 through the crawling motor. After the crawling control device receives the walking instruction signal, the crawling control device operates through an internal crawling motor to drive a crawling arm to move, and then the whole packer is driven to walk in a shaft; the packer has the advantages that the technical limit of conventional oil pipe conveying is broken through, when the position of the packer in a shaft is adjusted, power devices such as a well repairing operation vehicle which must be matched when a process pipe column is integrally dragged are omitted, the operation flow is simplified, meanwhile, the operation and matching cost can be greatly reduced, and the safety performance of underground operation is improved. The crawling control device is a PLC controller, belongs to the prior art, and is not described in detail here.
Furthermore, the number of the crawling arms is 2, the 2 crawling arms are distributed in a 180-degree direction, and crawling gears are arranged on the crawling arms; the crawling of the crawling mechanism is facilitated, the friction force during crawling is reduced, and time and labor are saved during crawling.
Further, the guide head 9 is a conical guide mechanism. The conical design can effectively reduce the resistance of the packer in the forward walking process.
Further, a magnetic locator is arranged inside the guide head 9; the magnetic locator positions the position of the whole packer in the shaft in real time, and the movement and the arrangement of the packer at any position in the shaft are realized.
The working principle of the invention is as follows:
the armored cable is connected with the horizontal well electric control self-walking packer through a cable joint, and the packer is conveyed to the underground through the armored cable; the armor cables supply power to the packer, and send command signals to the horizontal well electric control self-walking packer through the armor cables from the ground, the position of the horizontal well electric control self-walking packer in a shaft is determined according to the scheme design, after the power is supplied to the crawling mechanism setting motor, the crawling control device drives the crawling arm to move through the operation of the internal crawling motor, so as to drive the whole packer to walk in the shaft, according to the positioning result of the guide head position, after the horizontal well electric control self-walking packer reaches the set position, the crawling mechanism drives the crawling motor to stop running, after the packer setting motor receives a ground setting signal command, the setting motor runs to drive the setting pump to work, the setting pump injects setting oil into the rubber cylinder through the check valve to realize pressing setting, the pressure measurement of a sensor for monitoring the pressure inside and outside the packer, when the pressure difference reaches a set value, stopping the setting motor, and finishing the setting of the packer; when the packer is unpacked, the setting motor is electrified with negative electricity, the pressure relief valve is opened, and the pressure in the packer rubber cylinder is reduced and the packer is unpacked; the remote electric control position adjustment and the repeated setting and unsealing of the packer at any position of the horizontal shaft can be realized by repeating the actions.
In the description of the present invention, it is to be understood that the terms "left", "inside", "right", and the like, if any, indicate an orientation or positional relationship based on that shown in the drawings, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the terms describing a positional relationship in the drawings are used for illustrative purposes only and are not to be construed as limiting the present patent.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (9)
1. The utility model provides an automatically controlled self-walking packer of horizontal well which characterized in that: the automatic sealing device comprises a cable (1), a centralizer (3), an oil bag (4), a setting mechanism (6), a rubber cylinder (7), a crawling mechanism (8) and a guiding head (9), wherein the cable (1), the centralizer (3), the oil bag (4), the setting mechanism (6), the rubber cylinder (7), the crawling mechanism (8) and the guiding head (9) are sequentially connected from left to right.
2. The horizontal well electric control self-walking packer according to claim 1, characterized in that: the cable (1) is an armored cable.
3. The horizontal well electric control self-walking packer according to claim 1, characterized in that: still include cable joint (2), cable (1) is through cable joint (2) connection centralizer (3).
4. The horizontal well electric control self-walking packer according to claim 1, characterized in that: the centralizer (3) is a roller centralizer.
5. The horizontal well electric control self-walking packer as claimed in claim 4, characterized in that: the roller centralizer comprises a centralizer body (3-1) and a plurality of direction rolling wheels (3-2), wherein the direction rolling wheels (3-2) are distributed on the outer surface of the centralizer body (3-1) in a circumferential and equidistant mode, and the direction rolling wheels (3-2) roll along the axial direction of a shaft.
6. The horizontal well electric control self-walking packer according to claim 1, characterized in that: the oil bag sealing device further comprises a protective outer pipe (5), and the protective outer pipe (5) is sleeved outside the oil bag (4) and the setting mechanism (6).
7. The horizontal well electric control self-walking packer according to claim 1, characterized in that: the setting mechanism (6) comprises a setting motor, a setting pump, a one-way valve, a pressure relief valve and an internal and external pressure sensor of a monitoring packer, the setting motor is respectively connected with an inlet of the setting pump, an inlet of the pressure relief valve and the internal and external pressure sensor of the monitoring packer, an outlet of the setting pump is connected with a rubber cylinder (7) through the one-way valve, an outlet of the pressure relief valve is connected with the rubber cylinder (7), and the setting pump is connected with an oil bag (4).
8. The horizontal well electric control self-walking packer according to claim 1, characterized in that: the crawling mechanism (8) comprises a crawling body (8-1), a crawling motor, a crawling control device and a crawling arm (8-2), the number of the crawling arms (8-2) is multiple, the external connection of the crawling body (8-1) is multiple, the internal connection of the crawling body (8-1) is the crawling motor and the crawling control device, and the crawling control device is connected with the crawling arm (8-2) through the crawling motor.
9. The horizontal well electric control self-walking packer according to claim 1, characterized in that: the guide head (9) is a conical guide mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011215338.0A CN112211586A (en) | 2020-11-04 | 2020-11-04 | Electrically controlled self-walking packer for horizontal well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215338.0A CN112211586A (en) | 2020-11-04 | 2020-11-04 | Electrically controlled self-walking packer for horizontal well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113250644A (en) * | 2021-07-16 | 2021-08-13 | 山东鹤鹏技术有限公司 | Downhole packer with self-locking mechanism |
| CN113790038A (en) * | 2021-10-14 | 2021-12-14 | 四川圣诺油气工程技术服务有限公司 | Self-driven induction type oil pipe inner blanking plug |
| CN114016937A (en) * | 2021-11-14 | 2022-02-08 | 韩一泉 | Deblocking workover rig |
| US20230175332A1 (en) * | 2021-12-08 | 2023-06-08 | Saudi Arabian Oil Company | Apparatus, systems, and methods for sealing a wellbore |
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| CN113790038A (en) * | 2021-10-14 | 2021-12-14 | 四川圣诺油气工程技术服务有限公司 | Self-driven induction type oil pipe inner blanking plug |
| CN114016937A (en) * | 2021-11-14 | 2022-02-08 | 韩一泉 | Deblocking workover rig |
| CN114016937B (en) * | 2021-11-14 | 2023-11-24 | 通化石油化工机械制造有限责任公司 | Deblocking workover rig |
| US20230175332A1 (en) * | 2021-12-08 | 2023-06-08 | Saudi Arabian Oil Company | Apparatus, systems, and methods for sealing a wellbore |
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