CN114109308B - Intelligent well sliding sleeve target horizon selection hydraulic control system and method - Google Patents
Intelligent well sliding sleeve target horizon selection hydraulic control system and method Download PDFInfo
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- CN114109308B CN114109308B CN202111423669.8A CN202111423669A CN114109308B CN 114109308 B CN114109308 B CN 114109308B CN 202111423669 A CN202111423669 A CN 202111423669A CN 114109308 B CN114109308 B CN 114109308B
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/16—Control means therefor being outside the borehole
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a hydraulic control system and a hydraulic control method for selecting a target horizon of an intelligent well sliding sleeve, wherein the hydraulic control system comprises a first hydraulic input pipeline, a second hydraulic input pipeline, a third hydraulic input pipeline, a first hydraulic input pipeline joint, a second hydraulic input pipeline joint, a third hydraulic input pipeline joint, a first normally-closed hydraulic control one-way valve, a second normally-closed hydraulic control one-way valve, a third normally-closed hydraulic control one-way valve, a fourth normally-closed hydraulic control one-way valve, a fifth normally-closed hydraulic control one-way valve, a first oil passing pore channel, a second oil passing pore channel and a third oil passing pore channel; six wiring combination forms are arranged between the three hydraulic input pipelines and the three hydraulic input pipeline joints. According to the invention, six layers of underground target layer positions are selected through six different pressure value combination forms (high pressure, low pressure and oil return) on three hydraulic pipelines, and a decoder of one layer can be independently started, so that the flow control of the target oil and gas layer is realized.
Description
Technical Field
The invention relates to the technical field of oil and gas drilling completion and oil and gas exploitation, in particular to a hydraulic control system and a hydraulic control method for selecting a target horizon of an intelligent well sliding sleeve.
Background
In oil and gas production, an oil and gas well may traverse multiple hydrocarbon reservoirs underground, and the production of each hydrocarbon reservoir needs to be independently managed to improve production efficiency. The underground flow control valve is a key control device for controlling inflow of each production layer in the intelligent well, and one or more production layers can be closed, opened or throttled by using the throttling function of the flow control valve, so that independent control of different production layers or branch flows is realized. The underground flow control valve can adjust the pressure, the fluid flow rate and the shaft inflow dynamics between all producing layers in real time, realize multi-layer combined production and mixed production, realize real-time control and optimized production of oil reservoirs, control water cone gas invasion, accelerate production and improve oil and gas recovery ratio.
In the prior art, part of intelligent well completion technology adopts the combination of an N+1 technology and a J-shaped slot technology, which is equivalent to the intelligent well completion flow control technology of direct hydraulic drive. The hydraulic control system has no decoding function, if the opening degree of the underground N-layer sliding sleeve needs to be controlled, n+1 hydraulic control pipelines are needed, as the number of control layers increases, the hydraulic control pipelines increase, the wellhead passes through difficultly, the underground pipelines are too many, and the operation risk is large. The other part adopts an electric control mode to determine the underground horizon, which is simple and feasible, but the service life of the current electronic components can be greatly shortened under the conditions of underground high temperature and high pressure.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an intelligent well sliding sleeve target horizon selection hydraulic control system and method.
The technical scheme of the invention is as follows:
in one aspect, an intelligent well sliding sleeve target horizon selection hydraulic control system is provided, including a first hydraulic input pipeline, a second hydraulic input pipeline, a third hydraulic input pipeline, a first hydraulic input pipeline joint, a second hydraulic input pipeline joint, a third hydraulic input pipeline joint, a first normally closed pilot operated check valve, a second normally closed pilot operated check valve, a third normally closed pilot operated check valve, a fourth normally closed pilot operated check valve, a fifth normally closed pilot operated check valve, a first oil passage, a second oil passage and a third oil passage;
the first normally closed hydraulic control one-way valve is provided with a first control port and a first oil outlet, the second normally closed hydraulic control one-way valve is provided with a second control port and a second oil outlet, the third normally closed hydraulic control one-way valve is provided with a third control port and a third oil outlet, the fourth normally closed hydraulic control one-way valve is provided with a fourth control port and a fourth oil outlet, and the fifth normally closed hydraulic control one-way valve is provided with a fifth control port and a fifth oil outlet;
the first hydraulic input pipeline, the second hydraulic input pipeline and the third hydraulic input pipeline are connected with the first hydraulic input pipeline connector, the second hydraulic input pipeline connector and the third hydraulic input pipeline connector in a six-two connected arrangement and combination mode;
the first oil passing hole comprises a first oil passing hole I, a second oil passing hole II and a third oil passing hole III; the second oil passing hole comprises a first oil passing hole, a second oil passing hole and a third oil passing hole; the third oil passing hole comprises a first oil passing hole and a second oil passing hole;
the first hydraulic input pipeline joint, the first oil passing hole channel I, the first normally closed hydraulic control one-way valve, the first oil passing hole channel II, the third normally closed hydraulic control one-way valve and the first oil passing hole channel III are connected in sequence; the second hydraulic input pipeline joint, the first oil passing hole way, the second normally-closed hydraulic control one-way valve, the second oil passing hole way, the fourth normally-closed hydraulic control one-way valve and the third oil passing hole way are sequentially connected; the third hydraulic input pipeline joint, the third oil passing hole I and the fifth normally closed hydraulic control one-way valve are sequentially connected with the third oil passing hole II;
the first control port is connected with the first oil passing hole I, and the third control port is connected with the second oil passing hole II; the second control port is connected with the first oil passing hole II, and the fourth control port is connected with the first oil passing hole III; the fifth control port is connected with the first oil passing hole III.
Preferably, in the six kinds of connected permutation and combination modes, the first hydraulic input pipeline is connected with the first hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the second hydraulic input pipeline connector, and the connection mode that the third hydraulic input pipeline is connected with the third hydraulic input pipeline connector is used for controlling the first layer horizon;
the first hydraulic input pipeline is connected with the first hydraulic input pipeline joint, the second hydraulic input pipeline is connected with the third hydraulic input pipeline joint, and the connection mode of the third hydraulic input pipeline and the second hydraulic input pipeline joint is used for controlling the layer level of the second layer;
the first hydraulic input pipeline is connected with the second hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the first hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline and the third hydraulic input pipeline connector is used for controlling a third layer horizon;
the first hydraulic input pipeline is connected with the second hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the third hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline and the first hydraulic input pipeline connector is used for controlling a fourth layer horizon;
the first hydraulic input pipeline is connected with the third hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the second hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline connected with the first hydraulic input pipeline connector is used for controlling a fifth layer horizon;
the first hydraulic input pipeline is connected with the third hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the first hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline and the second hydraulic input pipeline connector is used for controlling a sixth layer of horizon.
On the other hand, the invention also provides a method for selecting the target horizon of the intelligent well sliding sleeve, which adopts the hydraulic control system for selecting the target horizon of the intelligent well sliding sleeve according to any one of the above steps: driving high pressure into one hydraulic input pipeline of the first hydraulic input pipeline, the second hydraulic input pipeline and the third hydraulic input pipeline through a ground hydraulic station, driving low pressure into the other hydraulic input pipeline, and taking the rest hydraulic input pipeline as an oil return pipeline without pressing; and the selection of the six underground target layers is realized through the different selections of the high-pressure, low-pressure and oil return pipelines.
Preferably, the high pressure and the low pressure are determined by opening pressures of the first normally closed pilot operated check valve, the second normally closed pilot operated check valve, the third normally closed pilot operated check valve, the fourth normally closed pilot operated check valve and the fifth normally closed pilot operated check valve; the high pressure is required to be larger than the opening pressure of the first normally-closed pilot-operated check valve and the second normally-closed pilot-operated check valve, and the low pressure is required to be smaller than the high pressure and larger than the opening pressure of the third normally-closed pilot-operated check valve, the fourth normally-closed pilot-operated check valve and the fifth normally-closed pilot-operated check valve.
Preferably, when the first layer of the level is required to be selected as the target level, a high pressure is applied to the first hydraulic input pipeline, a low pressure is applied to the second hydraulic input pipeline, and no pressure is applied to the third hydraulic input pipeline.
Preferably, when the second layer of the level is required to be selected as the target level, a high pressure is applied to the first hydraulic input pipeline, no pressure is applied to the second hydraulic input pipeline, and a low pressure is applied to the third hydraulic input pipeline.
Preferably, when the third layer is required to be selected as the target layer, a low pressure is applied to the first hydraulic input pipeline, a high pressure is applied to the second hydraulic input pipeline, and no pressure is applied to the third hydraulic input pipeline.
Preferably, when the fourth layer of level is required to be selected as the target level, the first hydraulic input pipeline is pressurized with low pressure, the second hydraulic input pipeline is pressurized with no pressure, and the third hydraulic input pipeline is pressurized with high pressure.
Preferably, when the fifth layer is required to be selected as the target layer, the first hydraulic input pipeline is not pressurized, the second hydraulic input pipeline is pressurized with low pressure, and the third hydraulic input pipeline is pressurized with high pressure.
Preferably, when the sixth layer of level is required to be selected as the target level, the first hydraulic input pipeline is not pressurized, the second hydraulic input pipeline is pressurized, and the third hydraulic input pipeline is pressurized with a low pressure.
The beneficial effects of the invention are as follows:
according to the invention, six wiring combination forms are available between the three hydraulic input pipelines and the three hydraulic input pipeline connectors, and six different pressure numerical combination forms (high pressure, low pressure and oil return) on the three hydraulic pipelines are utilized to realize the underground six-layer target horizon selection, and the decoder of one layer can be independently started, so that the flow control of the target hydrocarbon reservoir is realized. Simple structure and high reliability.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of an intelligent well sliding sleeve target horizon selection hydraulic control system of the present invention;
FIG. 2 is a schematic diagram of the wiring of the intelligent well sliding sleeve target horizon selection hydraulic control system of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples. It should be noted that, without conflict, the embodiments and technical features of the embodiments in the present application may be combined with each other. It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated. The use of the terms "comprising" or "includes" and the like in this disclosure is intended to cover a member or article listed after that term and equivalents thereof without precluding other members or articles.
In one aspect, as shown in fig. 1, the present invention provides an intelligent well sliding sleeve target horizon selection hydraulic control system, which includes a first hydraulic input line 1, a second hydraulic input line 2, a third hydraulic input line 3, a first hydraulic input line joint 19, a second hydraulic input line joint 20, a third hydraulic input line joint 21, a first normally closed pilot operated check valve 4, a second normally closed pilot operated check valve 5, a third normally closed pilot operated check valve 6, a fourth normally closed pilot operated check valve 7, a fifth normally closed pilot operated check valve 8, a first oil passing hole channel 22, a second oil passing hole channel 23, and a third oil passing hole channel 24;
the first normally closed hydraulic control one-way valve 4 is provided with a first control port 9 and a first oil outlet 10, the second normally closed hydraulic control one-way valve 5 is provided with a second control port 11 and a second oil outlet 12, the third normally closed hydraulic control one-way valve 6 is provided with a third control port 13 and a third oil outlet 14, the fourth normally closed hydraulic control one-way valve 7 is provided with a fourth control port 15 and a fourth oil outlet 16, and the fifth normally closed hydraulic control one-way valve 8 is provided with a fifth control port 17 and a fifth oil outlet 18;
the first hydraulic input pipeline 1, the second hydraulic input pipeline 2 and the third hydraulic input pipeline 3 are connected with the first hydraulic input pipeline joint 19, the second hydraulic input pipeline joint 20 and the third hydraulic input pipeline joint 21 according to six connected arrangement and combination modes shown in fig. 2; specific:
1) The first hydraulic input line 1 is connected to the first hydraulic input line connection 19, the second hydraulic input line 2 is connected to the second hydraulic input line connection 20, and the third hydraulic input line 3 is connected to the third hydraulic input line connection 21;
2) The first hydraulic input line 1 is connected to the first hydraulic input line connection 19, the second hydraulic input line 2 is connected to the third hydraulic input line connection 21, and the third hydraulic input line 3 is connected to the second hydraulic input line connection 20;
3) The first hydraulic input line 1 is connected to the second hydraulic input line connection 20, the second hydraulic input line 2 is connected to the first hydraulic input line connection 19, and the third hydraulic input line 3 is connected to the third hydraulic input line connection 21;
4) The first hydraulic input line 1 is connected to the second hydraulic input line connection 20, the second hydraulic input line 2 is connected to the third hydraulic input line connection 21, and the third hydraulic input line 3 is connected to the first hydraulic input line connection 19;
5) The first hydraulic input line 1 is connected to the third hydraulic input line connection 21, the second hydraulic input line 2 is connected to the second hydraulic input line connection 20, and the third hydraulic input line 3 is connected to the first hydraulic input line connection 19;
6) The first hydraulic input line 1 is connected to the third hydraulic input line connection 21, the second hydraulic input line 2 is connected to the first hydraulic input line connection 19, and the third hydraulic input line 3 is connected to the second hydraulic input line connection 20;
the first oil passing hole 22 comprises a first oil passing hole, a second oil passing hole and a third oil passing hole; the second oil passing hole 23 comprises a first oil passing hole, a second oil passing hole and a third oil passing hole; the third oil passing hole 24 includes a first oil passing hole and a second oil passing hole;
the first hydraulic input pipeline joint 19, the first oil passing hole way I, the first normally-closed hydraulic control one-way valve 4, the first oil passing hole way II, the third normally-closed hydraulic control one-way valve 6 and the first oil passing hole way III are connected in sequence; the second hydraulic input pipeline joint 20, the first oil passing hole way, the second normally-closed hydraulic control one-way valve 5, the second oil passing hole way, the fourth normally-closed hydraulic control one-way valve 7 and the third oil passing hole way are sequentially connected; the third hydraulic input pipeline joint 21, the third oil passing hole I, the fifth normally closed hydraulic control one-way valve 8 and the third oil passing hole II are connected in sequence;
the first control port 9 is connected with the first oil passing hole I, and the third control port 13 is connected with the second oil passing hole II; the second control port 11 is connected with the first oil passing hole II, and the fourth control port 15 is connected with the first oil passing hole III; the fifth control port 17 is connected to the first oil passing hole three.
It should be noted that, in the present invention, the normally closed hydraulically controlled check valve is in the prior art, and the specific structure is not described here again.
On the other hand, the invention also provides a method for selecting the target horizon of the intelligent well sliding sleeve, which adopts the hydraulic control system for selecting the target horizon of the intelligent well sliding sleeve to select, and comprises the following steps: one hydraulic input pipeline of the first hydraulic input pipeline 1, the second hydraulic input pipeline 2 and the third hydraulic input pipeline 3 is driven into high pressure through a ground hydraulic station, the other hydraulic input pipeline is driven into low pressure, and the rest hydraulic input pipeline is not driven into pressure to serve as an oil return pipeline; and the selection of the six underground target layers is realized through the different selections of the high-pressure, low-pressure and oil return pipelines.
In a specific embodiment, selecting a smart well to select a sliding sleeve target horizon using the present invention includes the steps of:
(1) Through the ground hydraulic station, the first hydraulic input pipeline 1 and the second hydraulic input pipeline 2 are pressurized simultaneously, wherein the first hydraulic input pipeline 1 is pressurized, the second hydraulic input pipeline 2 is pressurized at a low pressure, and the third hydraulic input pipeline 3 is not pressurized as an oil return pipeline.
The pressure values of the high pressure and the low pressure can be determined according to the opening pressures of the first normally closed pilot operated check valve 4, the second normally closed pilot operated check valve 5, the third normally closed pilot operated check valve 6, the fourth normally closed pilot operated check valve 7 and the fifth normally closed pilot operated check valve 8. In this embodiment, the opening pressures of the first normally-closed pilot-operated check valve 4 and the second normally-closed pilot-operated check valve 5 are 8MPa, the opening pressures of the third normally-closed pilot-operated check valve 6, the fourth normally-closed pilot-operated check valve 7 and the fifth normally-closed pilot-operated check valve 8 are 2MPa, the selected high-pressure is 10MPa (greater than the opening pressures of the first normally-closed pilot-operated check valve 4 and the second normally-closed pilot-operated check valve 5), and the low-pressure is 5MPa (less than the high-pressure and greater than the opening pressures of the third normally-closed pilot-operated check valve 6, the fourth normally-closed pilot-operated check valve 7 and the fifth normally-closed pilot-operated check valve 8).
In this embodiment, the flow conditions of each layer selecting nipple are as follows:
1) First layer position selection nipple joint liquid flow condition: the first hydraulic input line 1 is connected to a first hydraulic input line connection 19, the second hydraulic input line 2 is connected to a second hydraulic input line connection 20, and the third hydraulic input line 3 is connected to a third hydraulic input line connection 21. Since the high-pressure value on the first hydraulic input line 1 exceeds the opening pressure of the first normally-closed pilot operated check valve 4, the first normally-closed pilot operated check valve 4 is opened when the high-pressure hydraulic oil flows into the first control port 9 through the first hydraulic input line joint 19. The high-pressure hydraulic oil flows into the second control port 11 through the first oil outlet port 10. Since the high pressure value exceeds the opening pressure of the second normally closed pilot operated check valve 5, the second normally closed pilot operated check valve 5 is opened and the low pressure hydraulic oil on the second hydraulic input line 2 flows into the third control port 13 through the second hydraulic input line joint 20 and the second oil outlet 12. Since the low pressure value exceeds the opening pressure of the third normally closed pilot operated check valve 6, the third normally closed pilot operated check valve 6 is opened and the high pressure hydraulic oil on the first hydraulic pressure input line 1 flows into the fourth control port 15 and the fifth control port 17 through the third oil outlet port 14. Since the high pressure value far exceeds the opening pressures of the fourth normally-closed pilot operated check valve 7 and the fifth normally-closed pilot operated check valve 8, the fourth normally-closed pilot operated check valve 7 and the fifth normally-closed pilot operated check valve 8 are opened. The five normally closed hydraulically controlled check valves 4, 5, 6, 7, 8 are all opened, the three hydraulic input lines 1, 2, 3 are connected with the three hydraulic input lines of the opening control part below through the oil outlets 14, 16, 18, and then the first layer of level selection pup joint is started.
2) The second layer of layer position selection nipple joint liquid flow condition: the first hydraulic input line 1 is connected to a first hydraulic input line connection 19, the second hydraulic input line 2 is connected to a third hydraulic input line connection 21, and the third hydraulic input line 3 is connected to a second hydraulic input line connection 20. Since the high-pressure value on the first hydraulic input line 1 exceeds the opening pressure of the first normally-closed pilot operated check valve 4, the first normally-closed pilot operated check valve 4 is opened when the high-pressure hydraulic oil flows into the first control port 9 through the first hydraulic input line joint 19. The high-pressure hydraulic oil flows into the second control port 11 through the first oil outlet port 10. The second normally closed pilot operated check valve 5 is opened as the high pressure value exceeds the opening pressure of the second normally closed pilot operated check valve 5. The second hydraulic input line joint 20 is connected with the third hydraulic input line 3 (oil return line), the second oil outlet 12 still has no hydraulic oil output, the hydraulic control check valves 6, 7 and 8 are not opened, and the second layer level selection nipple is not started.
3) Third layer horizon selection nipple flow conditions: the first hydraulic input line 1 is connected to a second hydraulic input line connection 20, the second hydraulic input line 2 is connected to a first hydraulic input line connection 19, and the third hydraulic input line 3 is connected to a third hydraulic input line connection 21. Because the low-pressure value on the second hydraulic input pipeline 2 is lower than the opening pressure of the first normally-closed hydraulic control check valve 4, the first normally-closed hydraulic control check valve 4 is not opened, and the first oil outlet 10 outputs no hydraulic oil. And if none of the hydraulic control check valves 4, 5, 6, 7 and 8 is opened, the third layer position selecting nipple is not started.
4) The fourth layer of layer position selection nipple joint liquid flow condition: the first hydraulic input line 1 is connected to a second hydraulic input line connection 20, the second hydraulic input line 2 is connected to a third hydraulic input line connection 21, and the third hydraulic input line 3 is connected to a first hydraulic input line connection 19. Since there is no pressure on the third hydraulic input line 3, the first normally closed pilot operated check valve 4 is not opened and the first oil outlet 10 is not outputting hydraulic oil. And the hydraulic control check valves 4, 5, 6, 7 and 8 are not opened, so that the fourth layer of level selection nipple is not started.
5) Fifth layer horizon selection nipple flow conditions: the first hydraulic input line 1 is connected to a third hydraulic input line connection 21, the second hydraulic input line 2 is connected to a second hydraulic input line connection 20, and the third hydraulic input line 3 is connected to a first hydraulic input line connection 19. Since there is no pressure on the third hydraulic input line 3, the first normally closed pilot operated check valve 4 is not opened and the first oil outlet 10 is not outputting hydraulic oil. And if none of the hydraulic control check valves 4, 5, 6, 7 and 8 is opened, the fifth layer position selecting nipple is not started.
6) Sixth layer of positioning selection nipple joint liquid flow condition: the first hydraulic input line 1 is connected to a third hydraulic input line connection 21, the second hydraulic input line 2 is connected to a first hydraulic input line connection 19, and the third hydraulic input line 3 is connected to a second hydraulic input line connection 20. Because the low-pressure value on the second hydraulic input pipeline 2 is lower than the opening pressure of the first normally-closed hydraulic control check valve 4, the first normally-closed hydraulic control check valve 4 is not opened, and the first oil outlet 10 outputs no hydraulic oil. And if all the hydraulic control one- way valves 4, 5, 6, 7 and 8 are not opened, the sixth layer of level selection nipple is not started.
(2) Similarly, when the first hydraulic input pipeline 1 is pressurized, the second hydraulic input pipeline 2 is not pressurized, and the third hydraulic input pipeline 3 is pressurized, the second horizon selection nipple is started;
when the first hydraulic input pipeline 1 is pressurized with low pressure, the second hydraulic input pipeline 2 is pressurized with high pressure, and the third hydraulic input pipeline 3 is not pressurized, the third layer selecting nipple is started;
when the first hydraulic input pipeline 1 is pressurized with low pressure, the second hydraulic input pipeline 2 is not pressurized, and the third hydraulic input pipeline 3 is pressurized with high pressure, the fourth horizon selection nipple is started;
when the first hydraulic input pipeline 1 is not pressurized, the second hydraulic input pipeline 2 is pressurized at low pressure, and the third hydraulic input pipeline 3 is pressurized at high pressure, the fifth-layer selecting nipple is started;
when the first hydraulic input line 1 is not pressurized, the second hydraulic input line 2 is pressurized, and the third hydraulic input line 3 is pressurized, the sixth horizon selection nipple is activated.
In summary, the invention adopts a simple one-way valve combination, utilizes the high-low pressure combination of three hydraulic pipelines to realize the underground six-layer target horizon selection, has the advantages of simple decoding scheme, less hydraulic control pipelines, relatively low device processing precision requirement, stable system, long service life and the like, and has remarkable progress compared with the prior art.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the invention.
Claims (9)
1. The intelligent well sliding sleeve target level selection hydraulic control system is characterized by comprising a first hydraulic input pipeline, a second hydraulic input pipeline, a third hydraulic input pipeline, a first hydraulic input pipeline joint, a second hydraulic input pipeline joint, a third hydraulic input pipeline joint, a first normally closed hydraulic control check valve, a second normally closed hydraulic control check valve, a third normally closed hydraulic control check valve, a fourth normally closed hydraulic control check valve, a fifth normally closed hydraulic control check valve, a first oil passing duct, a second oil passing duct and a third oil passing duct;
the first normally closed hydraulic control one-way valve is provided with a first control port and a first oil outlet, the second normally closed hydraulic control one-way valve is provided with a second control port and a second oil outlet, the third normally closed hydraulic control one-way valve is provided with a third control port and a third oil outlet, the fourth normally closed hydraulic control one-way valve is provided with a fourth control port and a fourth oil outlet, and the fifth normally closed hydraulic control one-way valve is provided with a fifth control port and a fifth oil outlet;
the first hydraulic input pipeline, the second hydraulic input pipeline and the third hydraulic input pipeline are connected with the first hydraulic input pipeline connector, the second hydraulic input pipeline connector and the third hydraulic input pipeline connector in a six-two connected arrangement and combination mode;
in the six-type connected permutation and combination mode, the first hydraulic input pipeline is connected with the first hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the second hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline and the third hydraulic input pipeline connector is used for controlling the first layer horizon;
the first hydraulic input pipeline is connected with the first hydraulic input pipeline joint, the second hydraulic input pipeline is connected with the third hydraulic input pipeline joint, and the connection mode of the third hydraulic input pipeline and the second hydraulic input pipeline joint is used for controlling the layer level of the second layer;
the first hydraulic input pipeline is connected with the second hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the first hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline and the third hydraulic input pipeline connector is used for controlling a third layer horizon;
the first hydraulic input pipeline is connected with the second hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the third hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline and the first hydraulic input pipeline connector is used for controlling a fourth layer horizon;
the first hydraulic input pipeline is connected with the third hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the second hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline connected with the first hydraulic input pipeline connector is used for controlling a fifth layer horizon;
the first hydraulic input pipeline is connected with the third hydraulic input pipeline connector, the second hydraulic input pipeline is connected with the first hydraulic input pipeline connector, and the connection mode of the third hydraulic input pipeline and the second hydraulic input pipeline connector is used for controlling a sixth layer of horizon;
the first oil passing hole comprises a first oil passing hole I, a second oil passing hole II and a third oil passing hole III; the second oil passing hole comprises a first oil passing hole, a second oil passing hole and a third oil passing hole; the third oil passing hole comprises a first oil passing hole and a second oil passing hole;
the first hydraulic input pipeline joint, the first oil passing hole channel I, the first normally closed hydraulic control one-way valve, the first oil passing hole channel II, the third normally closed hydraulic control one-way valve and the first oil passing hole channel III are connected in sequence; the second hydraulic input pipeline joint, the first oil passing hole way, the second normally-closed hydraulic control one-way valve, the second oil passing hole way, the fourth normally-closed hydraulic control one-way valve and the third oil passing hole way are sequentially connected; the third hydraulic input pipeline joint, the third oil passing hole I and the fifth normally closed hydraulic control one-way valve are sequentially connected with the third oil passing hole II;
the first control port is connected with the first oil passing hole I, and the third control port is connected with the second oil passing hole II; the second control port is connected with the first oil passing hole II, and the fourth control port is connected with the first oil passing hole III; the fifth control port is connected with the first oil passing hole III.
2. An intelligent well sliding sleeve target horizon selection method, which is characterized by adopting the intelligent well sliding sleeve target horizon selection hydraulic control system of claim 1 for selection, comprising the following steps: driving high pressure into one hydraulic input pipeline of the first hydraulic input pipeline, the second hydraulic input pipeline and the third hydraulic input pipeline through a ground hydraulic station, driving low pressure into the other hydraulic input pipeline, and taking the rest hydraulic input pipeline as an oil return pipeline without pressing; and the selection of the six underground target layers is realized through the different selections of the high-pressure, low-pressure and oil return pipelines.
3. The intelligent well sliding sleeve target horizon selection method of claim 2 wherein the high pressure and the low pressure are determined based on opening pressures of the first normally closed pilot operated check valve, the second normally closed pilot operated check valve, a third normally closed pilot operated check valve, a fourth normally closed pilot operated check valve, a fifth normally closed pilot operated check valve; the high pressure is required to be larger than the opening pressure of the first normally-closed pilot-operated check valve and the second normally-closed pilot-operated check valve, and the low pressure is required to be smaller than the high pressure and larger than the opening pressure of the third normally-closed pilot-operated check valve, the fourth normally-closed pilot-operated check valve and the fifth normally-closed pilot-operated check valve.
4. A method of selecting a target horizon for an intelligent well sliding sleeve according to claim 2 or claim 3 wherein when a first horizon is desired to be selected, a high pressure is applied to the first hydraulic input line, a low pressure is applied to the second hydraulic input line, and no pressure is applied to the third hydraulic input line.
5. A method of selecting a target horizon for an intelligent well sliding sleeve according to claim 2 or claim 3 wherein when a second horizon is desired to be selected, a high pressure is applied to the first hydraulic input line, no pressure is applied to the second hydraulic input line, and a low pressure is applied to the third hydraulic input line.
6. A method of intelligent well sliding sleeve target horizon selection according to claim 2 or 3 wherein when a third horizon is required to be selected as a target horizon, a low pressure is applied to the first hydraulic input line, a high pressure is applied to the second hydraulic input line, and no pressure is applied to the third hydraulic input line.
7. A method of selecting a target horizon for an intelligent well sliding sleeve according to claim 2 or claim 3 wherein when a fourth horizon is desired to be selected, a low pressure is applied to the first hydraulic input line, no pressure is applied to the second hydraulic input line, and a high pressure is applied to the third hydraulic input line.
8. A method of intelligent well sliding sleeve target horizon selection according to claim 2 or 3 wherein when a fifth horizon is required to be selected as a target horizon, no pressure is applied to the first hydraulic input line, low pressure is applied to the second hydraulic input line, and high pressure is applied to the third hydraulic input line.
9. A method of selecting a target horizon for an intelligent well sliding sleeve according to claim 2 or claim 3 wherein when a sixth horizon is desired to be selected, no pressure is applied to the first hydraulic input line, a high pressure is applied to the second hydraulic input line, and a low pressure is applied to the third hydraulic input line.
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| CN115898344B (en) * | 2023-02-21 | 2023-05-19 | 西南石油大学 | Flow control system and method for downhole travel control |
| CN117431790B (en) * | 2023-12-20 | 2024-03-26 | 西南石油大学 | Self-adaptive steel rail vibration absorber capable of efficiently recycling broadband vibration energy |
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