CN110748336B - Magnetic signal control electromagnetic force driving mechanical positioner and method - Google Patents
Magnetic signal control electromagnetic force driving mechanical positioner and method Download PDFInfo
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- CN110748336B CN110748336B CN201910720988.1A CN201910720988A CN110748336B CN 110748336 B CN110748336 B CN 110748336B CN 201910720988 A CN201910720988 A CN 201910720988A CN 110748336 B CN110748336 B CN 110748336B
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 82
- 230000008878 coupling Effects 0.000 claims abstract description 26
- 238000010168 coupling process Methods 0.000 claims abstract description 26
- 238000005859 coupling reaction Methods 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 19
- 230000004907 flux Effects 0.000 claims abstract description 7
- 210000002445 nipple Anatomy 0.000 claims description 22
- 230000005389 magnetism Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 238000011161 development Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OLTNQSDYEIONCS-UHFFFAOYSA-N [S].O=C=O Chemical compound [S].O=C=O OLTNQSDYEIONCS-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
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Abstract
The invention provides a magnetic signal control electromagnetic force driving mechanical positioner and a method thereof, wherein the magnetic signal control electromagnetic force driving mechanical positioner comprises a central shaft, a mechanical positioning mechanism, a fixed sleeve, an electromagnetic disc, an electromagnetic mechanism, a power supply short joint, a control unit and a lower joint, wherein the lower joint, the control unit, the power supply short joint, the electromagnetic mechanism, the fixed sleeve, the mechanical positioning mechanism and the central shaft are sequentially connected to form a tubular column; the sleeve and the spring are sleeved outside the central shaft in sequence, one end of the fixed sleeve is connected with the spring, and the other end of the fixed sleeve is connected with the electromagnetic disc. When the electromagnetic coupling is used for passing through the short sleeve coupling, the electromagnetic power supply pulse on/off is controlled by the magnetic flux change, the lower electromagnetic mechanism is driven when the electromagnetic coupling is started, the central shaft connected with the ferromagnetic disc ascends, and the mechanical positioning mechanism is started; the central shaft descends when closed. Therefore, the coupling can be displayed through the load change signal of the ground display instrument, so that the depth of the short sleeve is determined, and the problem that the continuous oil pipe cannot be effectively positioned on the airtight buckle sleeve well is solved.
Description
Technical Field
The invention relates to a magnetic signal control electromagnetic force driving mechanical positioner and a method thereof, which are used for accurately positioning the position of an underground casing collar and belong to the field of underground tools for oil-gas field development.
Background
The coiled tubing fracturing operation is a safe oil well yield increasing measure with obvious economic benefit. However, the packer at the lower end of the coiled tubing must be placed precisely over the fractured interval or the stimulation would not be effective. The coiled tubing is used as a conveying tool, the problems of pre-bending and stress expansion exist in the well entering process, and under the condition of no cable, the depth correction becomes a bottleneck of operation application. The current approach is to use mechanical positioners.
The mechanical positioner depth correcting technology is that the positioner is connected to the bottom of the technological pipe column, lowered to 5-6 m deg.f below the short casing collar, connected to high precision force transducer and intelligent instrument, and lifted to find the short casing collar. When the locator enters the short casing collar, the ground display can generate a 10-40 kN load change signal display, and the depth of the short casing can be determined. Mechanical positioners have good precision, but mechanical positioners have the following disadvantages: the sleeve is always contacted with the sleeve and the coupling in the working process, the sleeve can be worn, and the requirements on the positioning block and the spring strength are high.
However, the method is only suitable for common long round thread sleeve fastening wells, and along with the development of petroleum industry, especially the development of deep wells, ultra-deep wells, high-pressure gas wells, directional wells and the exploitation of corrosive gas wells such as high sulfur carbon dioxide, the method has higher requirements on the service performance of petroleum sleeves, and the oil sleeve with API standard threaded connection (such as short, long round threads and buttress threads) is difficult to meet the production requirements in many cases, so the special threaded connection of the type is developed at home and abroad: vam-top, must, tp-cq and the like, and the special threaded connection has better anti-sticking performance and higher reliable connection strength with higher air tightness. Because the airtight buckle sleeve adopts the airtight buckle close to the metal end face for sealing, after the airtight buckle sleeve is buckled in place, the end face of the pin buckle is propped against the step face of the box buckle to form sealing, unlike the common sleeve coupling, the conventional common sleeve coupling mechanical positioner cannot realize positioning in the special airtight buckle sleeve well.
Disclosure of Invention
In order to solve the problem that the existing common mechanical positioner for the casing collar cannot realize positioning in the special airtight buckle casing well, the invention provides a magnetic signal control electromagnetic force driving mechanical positioner and a method. The invention solves the problem of positioning the coiled tubing fracturing construction target layer in the airtight buckle casing well.
The invention adopts the technical scheme that:
the magnetic signal control electromagnetic force driving mechanical positioner comprises a central shaft, a mechanical positioning mechanism, a fixed sleeve, an electromagnetic disc, an electromagnetic mechanism, a power supply nipple, a control unit and a lower joint, wherein the lower joint, the control unit, the power supply nipple, the electromagnetic mechanism, the fixed sleeve, the mechanical positioning mechanism and the central shaft are sequentially connected to form a tubular column; the sleeve and the spring are sleeved outside the central shaft in sequence, one end of the fixed sleeve is connected with the spring, and the other end of the fixed sleeve is connected with the electromagnetic disc.
The power supply nipple is respectively and electrically connected with the control unit and the electromagnetic mechanism, and the control unit is in signal connection with the electromagnetic mechanism.
The control unit adopts a magnetic element to measure the position of the casing collar.
The power supply nipple is a high-resistant Wen Gongdian nipple.
A magnetic signal controlled electromagnetic force driving mechanical positioning method comprises the following specific steps:
when the pipe column is lowered to the vicinity of a preset position, the pipe column is lifted to start positioning, when the control unit passes through the short sleeve coupling, a pulse signal is generated, the power supply nipple is controlled to electrify the electromagnetic mechanism, instantaneous magnetism is generated, an electromagnetic disc between the fixed sleeve and the electromagnetic mechanism is attracted to the electromagnetic mechanism, the central shaft and the sleeve are driven to move upwards, the spring on the sleeve is compressed, the mechanical positioning mechanism is started to contact with the sleeve, instantaneous resistance is generated, and a wellhead can observe load change, so that the position of the sleeve coupling is determined;
when the pulse signal disappears, the power supply nipple stops supplying power to the electromagnetic mechanism, magnetism disappears, the electromagnetic disc has no magnetic force effect, the spring stretches the sleeve at the moment and drives the central shaft to move downwards, the mechanical positioning mechanism is closed, the electromagnetic disc falls back to the fixed sleeve at the same time, and the mechanical positioning mechanism is in a closed state without contact with the sleeve wall at the moment.
When the control unit passes through the sleeve coupling position, the magnetic flux changes due to the thickness change of the sleeve at the coupling, induced electromotive force is generated on the coil, and a working signal can be generated by the potential change on the electronic circuit detection coil to control the pulse on/off of the electromagnetic mechanism power supply.
The control unit provides pulse signals, the electromagnetic mechanism is pulse on and off, so that the mechanical positioning mechanism is opened and closed in a pulse mode, and the wellhead can detect the pulse change of the load, so that the casing coupling position is determined.
The control unit can clock control the work starting node and can start the power supply short section to supply power to the control unit at fixed time.
The beneficial effects of the invention are as follows:
the invention controls the pulse on/off of the electromagnetic mechanism power supply through the magnetic flux change, thereby controlling the opening/closing of the positioner to realize positioning.
The invention realizes the accurate positioning of the fracture target layer of the coiled tubing in the airtight buckle casing well.
The invention is suitable for coiled tubing operation without connecting cables.
The invention can realize the clock control working starting point and reduce the abrasion to the sleeve wall.
Drawings
Fig. 1 is a structural view of the present invention in an open state.
Fig. 2 is a structural view of the present invention in a closed state.
In the drawings, reference numerals are: 1. a central shaft; 2. a mechanical positioning mechanism; 3. a sleeve; 4. a spring; 5. a fixed sleeve; 6. an electric magnetic disk; 7. an electromagnetic mechanism; 8. a power supply nipple; 9. a control unit; 10 lower joints; 11 sleeves.
Detailed Description
Example 1:
in order to overcome the problem that the existing common mechanical positioner for the casing collar cannot realize positioning in the special airtight buckle casing well, the invention provides a magnetic signal control electromagnetic force driving mechanical positioner and a method as shown in fig. 1 and 2. The invention solves the problem of positioning the coiled tubing fracturing construction target layer in the airtight buckle casing well.
The magnetic signal control electromagnetic force driving mechanical positioner comprises a central shaft 1, a mechanical positioning mechanism 2, a fixed sleeve 5, an electromagnetic disc 6, an electromagnetic mechanism 7, a power supply nipple 8, a control unit 9 and a lower joint 10, wherein the lower joint 10, the control unit 9, the power supply nipple 8, the electromagnetic mechanism 7, the fixed sleeve 5, the mechanical positioning mechanism 2 and the central shaft 1 are sequentially connected to form a tubular column; the central shaft 1 is sequentially sleeved with the sleeve 3 and the spring 4, one end of the fixed sleeve 5 is connected with the spring 4, and the other end of the fixed sleeve is connected with the electromagnetic disc 6.
The magnetic signal controlled electromagnetic force driven mechanical positioner consists of a central shaft 1, a mechanical positioning mechanism 2, a sleeve 3, a spring 4, a fixed sleeve 5, an electromagnetic disc 6, an electromagnetic mechanism 7, a power supply short section 8, a control unit 9 and a lower joint 10.
As shown in fig. 1, when the string is lowered to near the predetermined position, the lifting string begins to be positioned. When the control unit 9 passes through the short sleeve joint hoop, a pulse signal is generated, the power supply short joint 8 is controlled to electrify the electromagnetic mechanism 7, instantaneous magnetism is generated, the electromagnetic disc 6 between the fixed sleeve 5 and the electromagnetic mechanism 7 is attracted to the electromagnetic mechanism 7, the central shaft 1 and the sleeve 3 are driven to move upwards, the spring 4 on the sleeve 3 is compressed, the mechanical positioning mechanism 2 is started and is contacted with the sleeve 11, instantaneous resistance is generated, and the wellhead can observe load change, so that the sleeve joint position is determined.
As shown in fig. 2, after the pulse signal disappears, the power supply nipple 8 stops supplying power to the electromagnetic mechanism 7, the magnetism disappears, the electromagnetic disc 5 has no magnetic force effect, at this time, the spring 4 stretches the sleeve 3 to drive the central shaft 1 to move downwards, the mechanical positioning mechanism 2 is closed, and at the same time, the electromagnetic disc 5 falls back onto the fixed sleeve 4, at this time, the mechanical positioning mechanism 2 is in a non-contact state with the sleeve wall 11, and is in a closed state.
The control unit 9 in the invention sends out a pulse signal to control the high-temperature-resistant power supply nipple 8 to supply power to the electromagnetic mechanism 7, and the electromagnet can be instantly electrified and generate magnetism; after the pulse signal disappears, the high-temperature-resistant power supply nipple 8 stops supplying power to the electromagnetic mechanism 7, and magnetism disappears; after the electromagnetic mechanism 7 is electrified, the electromagnetic disc 6 is sucked up, and the central shaft 1 is driven to move upwards, so that the mechanical positioning mechanism is started.
The central shaft 1 moves upwards and drives the sleeve 3 to move upwards to compress the spring 4.
After the electromagnetic mechanism 7 is powered off, the electromagnetic disc 6 has no magnetic force effect, the sleeve 3 is propped up by virtue of the compression force of the spring 4, the central shaft 1 is driven to move downwards, the mechanical positioning mechanism 2 is closed, and the electromagnetic disc 6 falls back onto the fixed sleeve 3.
The electromagnetic disk 6 is positioned between the electromagnetic mechanism 7 and the fixed sleeve 5, can move up and down, and can drive the central shaft 1 to move up and down at the same time. The control unit 9 and the electromagnetic mechanism 7 are both prior art in the present invention, and will not be further described in the present invention.
When the electromagnetic coupling is used for passing through the short sleeve coupling, the electromagnetic power supply pulse on/off is controlled by the magnetic flux change, the lower electromagnetic mechanism 7 is driven to move upwards when the electromagnetic coupling is started, and the mechanical positioning mechanism is started; the central shaft 1 descends when closed. Therefore, the coupling can be displayed through the load change signal of the ground display instrument, so that the depth of the short sleeve is determined, and the problem that the continuous oil pipe cannot be effectively positioned on the airtight buckle sleeve well is solved.
Example 2:
based on the embodiment 1, in this embodiment, the power supply nipple 8 is electrically connected to the control unit 9 and the electromagnetic mechanism 7, respectively, and the control unit 9 is in signal connection with the electromagnetic mechanism 7.
The control unit 9 uses magnetic elements to determine the casing collar position.
The power supply nipple 8 is a high-resistant Wen Gongdian nipple.
A magnetic signal controlled electromagnetic force driving mechanical positioning method comprises the following specific steps:
when the pipe column is lowered to the vicinity of a preset position, the pipe column is lifted to start positioning, when the control unit 9 passes through the short sleeve joint hoop, a pulse signal is generated, the power supply nipple 8 is controlled to electrify the electromagnetic mechanism 7, instantaneous magnetism is generated, the electromagnetic disc 6 between the fixed sleeve 5 and the electromagnetic mechanism 7 is sucked onto the electromagnetic mechanism 7, the central shaft 1 and the sleeve 3 are driven to move upwards, the spring 4 on the sleeve 3 is compressed, the mechanical positioning mechanism 2 is started and is contacted with the sleeve 11, instantaneous resistance is generated, and the wellhead can observe load change, so that the position of the sleeve coupling is determined;
when the pulse signal disappears, the power supply nipple 8 stops supplying power to the electromagnetic mechanism 7, magnetism disappears, the electromagnetic disc 5 has no magnetic force effect, at the moment, the spring 4 stretches the sleeve 3 to drive the central shaft 1 to move downwards, the mechanical positioning mechanism 2 is closed, meanwhile, the electromagnetic disc 5 falls back onto the fixed sleeve 4, at the moment, the mechanical positioning mechanism 2 is in non-contact with the sleeve wall 11 and is in a closed state.
When the control unit 9 passes through the sleeve coupling position, the magnetic flux changes due to the sleeve thickness change at the coupling, induced electromotive force is generated on the coil, and a working signal can be generated by the potential change on the electronic circuit detection coil to control the power pulse on/off of the electromagnetic mechanism 7.
The control unit 9 provides a pulse signal, the electromagnetic mechanism 7 is powered on and off in a pulse mode, so that the mechanical positioning mechanism 2 is opened and closed in a pulse mode, and a wellhead can detect the pulse change of the load, so that the casing coupling position is determined.
The electromagnetic mechanism is electrified to suck the electromagnetic disc, and simultaneously drives the central shaft to move upwards to start the mechanical positioning mechanism;
further, the central shaft 1 moves upwards and drives the sleeve 3 to move upwards to compress the spring 4
Further, after the electromagnetic mechanism 7 is powered off, the electromagnetic disc 6 has no magnetic force, the sleeve 3 is propped up by virtue of the compression force of the spring 4 to drive the central shaft 1 to move downwards, the mechanical positioning mechanism 2 is closed, and the electromagnetic disc 6 falls back onto the fixed sleeve 5;
further, since the control unit 9 provides a pulse signal, the electromagnetic mechanism 7 is pulsed on and off, so that the mechanical positioning mechanism 2 is pulsed on and off, and the wellhead can detect the pulse change of the load, thereby determining the casing collar position;
the control unit 3 can clock the work starting node, and can start the power supply nipple 8 at fixed time to supply power to the control unit 3.
The instrument uses a magnetic flux control unit, can time the working starting time, is provided with a battery in the high-temperature-resistant power supply short section, can adapt to the environment of long-term high temperature and high pressure in an oil well, and simultaneously is used as a part of an oil pipe to be put into the well together with the oil pipe. The invention realizes the accurate positioning of the fracture target layer of the coiled tubing in the airtight buckle casing well. The invention is suitable for coiled tubing operation without connecting cables. The invention can realize the clock control working starting point and reduce the abrasion to the sleeve wall.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention. The device structure and system method not described in detail in this embodiment are well known and commonly used in the industry and will not be described in detail.
Claims (4)
1. A magnetic signal control electromagnetic force driving mechanical positioning method is characterized in that: the magnetic signal is used for controlling the electromagnetic force to drive the mechanical positioner, the magnetic signal is used for controlling the electromagnetic force to drive the mechanical positioner to comprise a central shaft (1), a mechanical positioning mechanism (2), a fixed sleeve (5), an electromagnetic disc (6), an electromagnetic mechanism (7), a power supply short joint (8), a control unit (9) and a lower joint (10), wherein the lower joint (10), the control unit (9), the power supply short joint (8), the electromagnetic mechanism (7), the fixed sleeve (5), the mechanical positioning mechanism (2) and the central shaft (1) are sequentially connected to form a tubular column; the sleeve (3) and the spring (4) are sleeved outside the central shaft (1) in sequence, one end of the fixed sleeve (5) is connected with the spring (4), and the other end is connected with the electromagnetic disc (6);
the magnetic signal control electromagnetic force driving mechanical positioning method comprises the following specific steps:
when the pipe column is lowered to the vicinity of a preset position, the pipe column is lifted to start positioning, when a control unit (9) passes through a short sleeve coupling, a pulse signal is generated, a power supply short joint (8) is controlled to electrify an electromagnetic mechanism (7) to generate instantaneous magnetism, an electromagnetic disc (6) between a fixed sleeve (5) and the electromagnetic mechanism (7) is attracted to the electromagnetic mechanism (7), a central shaft (1) and a sleeve (3) are driven to move upwards, a spring (4) on the sleeve (3) is compressed, a mechanical positioning mechanism (2) is started to contact with a sleeve (11) to generate instantaneous resistance, and a wellhead observes load change, so that the position of the sleeve coupling is determined;
when the pulse signal disappears, the power supply short section (8) stops supplying power to the electromagnetic mechanism (7), magnetism disappears, the electromagnetic disc (6) has no magnetic force effect, at the moment, the spring (4) stretches the sleeve (3) to drive the central shaft (1) to move downwards, the mechanical positioning mechanism (2) is closed, meanwhile, the electromagnetic disc (6) falls back onto the fixed sleeve (5), at the moment, the mechanical positioning mechanism (2) is in no contact with the wall of the sleeve (11), and is in a closed state;
the control unit (9) identifies the coupling according to the magnetic field distortion between two permanent magnets with opposite polarities, when the control unit (9) passes through the position of the casing coupling, the magnetic flux changes due to the thickness change of the casing at the coupling, induced electromotive force is generated on the coil, the potential change on the electronic circuit detection coil can generate a working signal, and the electromagnetic mechanism (7) is controlled to be powered on/off in a pulse mode; the control unit (9) provides pulse signals, the electromagnetic mechanism (7) is pulse on and off, so that the mechanical positioning mechanism (2) is opened and closed in a pulse mode, and a wellhead can detect pulse changes of loads, so that the casing coupling position is determined; the control unit (9) controls the work starting node by a clock, and the power supply short section (8) can be started at regular time to supply power to the control unit (9).
2. A magnetic signal controlled electromagnetic force driven mechanical positioning method as defined in claim 1, wherein: the power supply nipple (8) is respectively and electrically connected with the control unit (9) and the electromagnetic mechanism (7), and the control unit (9) is in signal connection with the electromagnetic mechanism (7).
3. A magnetic signal controlled electromagnetic force driven mechanical positioning method as defined in claim 1, wherein: the control unit (9) adopts a magnetic element to measure the position of the casing collar.
4. A magnetic signal controlled electromagnetic force driven mechanical positioning method as defined in claim 1, wherein: the power supply nipple (8) is a high-resistant Wen Gongdian nipple.
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| CN201910720988.1A CN110748336B (en) | 2019-08-06 | 2019-08-06 | Magnetic signal control electromagnetic force driving mechanical positioner and method |
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| CN115853452B (en) * | 2021-09-24 | 2025-01-24 | 中国石油天然气集团有限公司 | An electromagnetic induction launch type drop-out short section for a self-sealing plug |
| CN115163053A (en) * | 2022-06-23 | 2022-10-11 | 中石化石油工程技术服务有限公司 | Wireless coupling positioner device for continuous oil pipe |
| CN119825271B (en) * | 2023-10-13 | 2025-11-04 | 中国石油天然气股份有限公司 | A downhole vibration uncoupling device and its control method |
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