CN114151052A - Layered flow adjusting device for intelligent layered water injection and using method thereof - Google Patents
Layered flow adjusting device for intelligent layered water injection and using method thereof Download PDFInfo
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- CN114151052A CN114151052A CN202111095894.3A CN202111095894A CN114151052A CN 114151052 A CN114151052 A CN 114151052A CN 202111095894 A CN202111095894 A CN 202111095894A CN 114151052 A CN114151052 A CN 114151052A
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- water injection
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- artificial well
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
-
- 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
Abstract
The invention discloses a layered flow regulating device for intelligent layered water injection and a use method thereof, wherein the layered flow regulating device for intelligent layered water injection comprises: man-made wells laid underground in an oil field; the pipe column penetrates through the middle part of the interior of the artificial well and is used for cable laying and water supply circulation; the packer is sleeved on the outer side of the pipe column at equal intervals, and a single water injection layer is formed between every two adjacent packers; the invention has the beneficial effects that: through flow control mechanism and corresponding silicon piezoresistive pressure sensor cooperation use, be convenient for better carry out the independent control to the discharge of different water injection layers, filter the subassembly through the sieve in the drainage mechanism and be convenient for better rivers to the delivery port and filter, silt gets into in the artificial well when preventing to flow back, can also shake through the filter screen simultaneously and fall its outside adnexed silt, guarantees the unblocked of rivers.
Description
Technical Field
The invention relates to the field of stratified water injection, in particular to a stratified flow adjusting device for intelligent stratified water injection and a using method thereof.
Background
The separate layer water injection is a water injection mode that a packer is put into a water injection well to separate oil layers with larger differences, and then a water distributor is used for separate layer water distribution, so that the water injection amount of a high-permeability layer is controlled, the water injection of a medium-low permeability oil layer is enhanced, and various oil layers can play roles. In heterogeneous multi-reservoir exploitation, in order to strengthen the medium and low permeable layers and control the water injection of the high permeable layer, according to the injection allocation requirement, the water injection mode of layered injection control is realized in the water injection well, which is an important means for solving the inter-layer contradiction in the oil field development process, maintaining the long-term stable and high yield of the oil field and improving the recovery ratio. In traditional separate layer water injection process, the flow is difficult to adjust in real time, needs to fish out the tubular column and adjusts corresponding water injection well choke, wastes time and energy and delays the engineering progress.
Disclosure of Invention
The invention aims to provide a layered flow regulating device for intelligent layered water injection and a using method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an intelligence layering is layering flow control device for water injection, includes:
man-made wells laid underground in an oil field;
the pipe column penetrates through the middle part of the interior of the artificial well and is used for cable laying and water supply circulation;
the packer is sleeved on the outer side of the pipe column at equal intervals, and a single water injection layer is formed between every two adjacent packers;
the flow adjusting mechanism is arranged in the middle of the pipe column and between the adjacent packers and is used for detecting and controlling the water injection flow;
the water injection ports are formed in the outer side of the pipe column and are positioned between the adjacent packers at equal intervals;
the drainage mechanism is arranged on the inner side of the artificial well and at a position which is attached to the water injection port, and is used for preventing water injection from flowing back and preventing silt from entering the artificial well;
the layered flow regulating device for intelligent layered water injection further comprises:
the artificial well comprises a silicon piezoresistive pressure sensor, wherein the silicon piezoresistive pressure sensor is arranged on the inner side of the artificial well and at the bottom of a packer, and the outer side pressure of the artificial well is detected after the detection end of the silicon piezoresistive pressure sensor penetrates through the artificial well.
In the implementation process, the flow regulating mechanism and the corresponding silicon piezoresistive pressure sensor are matched for use, so that the water flow of different water injection layers is better controlled independently, the water drainage mechanism is convenient for better discharging the water flow, and water injection backflow and silt entering the artificial well are prevented.
Preferably, the flow rate adjusting mechanism includes:
the outer cylinder is arranged in the middle of the pipe column and between the adjacent packers;
the first joint is arranged at the top of the outer barrel;
the second joint is arranged at the bottom of the outer cylinder, and the outer cylinder is in threaded connection with the pipe column through the first joint and the second joint;
the inner pipe is arranged in the outer barrel and used for water circulation;
the outer side of the inner pipe is symmetrically sleeved with a sealing partition plate which is used for sealing a gap between the inner pipe and the outer cylinder;
the limiting ring is fixedly connected to one end, far away from the sealing partition plate, of the inner wall of the outer barrel and is fixedly connected with the sealing partition plate, and the limiting ring is used for further reinforcing the sealing partition plate;
the main flow port is formed in the position, which is positioned on the upper side between the two sealing clapboards, on the outer side of the inner pipe and used for guiding water flow to flow out of the inner pipe;
the top of one of the sealing partition plates is provided with the electromagnetic flowmeter, and the detection end of the electromagnetic flowmeter extends into the main flow port to detect the water flow in the main flow port;
the rotating plate is arranged on the inner side of the outer barrel and is positioned on the upper part between the two sealing partition plates;
the fixed plate is fixedly connected to the inner side of the outer barrel and the bottom of the rotating plate, and the rotating plate is rotatably connected with the fixed plate;
the first connecting ports are arranged in the fixed plate at equal intervals;
the first connecting ports are formed in the rotating plate at equal intervals, the sizes of the first connecting ports are matched with those of the second connecting ports, and the first connecting ports and the second connecting ports are used for forming water flow channels with adjustable sizes for water supply circulation;
the top of the inner side of the rotating plate is provided with a tooth socket;
the motor is fixedly arranged on one side of the inner wall of the outer barrel;
the output shaft of the motor extends to the bottom of the sealing partition plate and is fixedly connected with a gear, and the gear is meshed with the rotating plate;
and the lateral side of the outer barrel is provided with branch ports which are arranged at the lower position between the two sealing partition plates at equal intervals.
Preferably, the branch ports are arranged in a ring shape, and the number and the positions of the branch ports are matched with those of the first connecting ports.
Preferably, the flow rate adjusting mechanism further includes:
and the PLC is fixedly arranged on the inner side of the outer barrel and used for controlling the motor.
Preferably, the drainage mechanism includes:
the connecting block is fixedly arranged on the inner side of the artificial well and at a position which is attached to the water injection port;
the water inlet is symmetrically formed in one side, away from the water injection port, of the connecting block, and the connecting block is used for enabling water to flow into the connecting block and be discharged out of the artificial well;
the middle part inside the connecting block is provided with a connecting channel, and two ends of the connecting channel are communicated with the two water inlets;
the water outlet is formed in one end, close to the water filling port, of the connecting block and is communicated with the water filling port;
the screening assembly is arranged inside the water outlet and used for preventing silt from blocking the water outlet;
the anti-backflow component is arranged inside the connecting block and located on one side of the water inlet and used for preventing water from flowing back.
Preferably, the screening assembly comprises:
the sliding sleeve is arranged inside the water outlet in a sliding manner;
the connecting block is internally provided with a water outlet, and the upper side and the lower side of the water outlet are both provided with sliding grooves;
the sliding sleeve slides through the sliding rod;
the first springs are sleeved on the outer sides of the sliding rods and positioned on the two sides of the sliding sleeve and used for buffering the sliding of the sliding sleeve;
the filter screen, the filter screen is installed to the inboard of sliding sleeve for filter to rivers and prevent that silt from getting into artificial well, drainage mechanism sieves the subassembly and is spherical structure.
Preferably, the backflow prevention assembly includes:
the side grooves are formed in the connecting block and located on one side of the water inlet;
one end of the inner wall of the side groove is fixedly connected with a second spring;
the stifled ball, the one end fixedly connected with stifled ball that the second spring is close to the water inlet, just stifled ball is located same horizontal plane with the water inlet, the size of stifled ball is greater than the water inlet, the water inlet is used for carrying out the shutoff to the water inlet when forming the backward flow in the connecting block.
Preferably, the silicon piezoresistive pressure sensor and the motor in the same water injection layer are electrically connected with corresponding PLC controllers, and the PLC controllers are electrically connected with an external control center through cables in the pipe columns.
The invention also provides a use method of the layered flow regulating device for intelligent layered water injection, which comprises the following steps:
the method comprises the following steps: laying the artificial well and the pipe column to an underground designated position of the oil field, electrifying the silicon piezoresistive pressure sensor, the motor and the PLC through a cable in the pipe column, and detecting the pressure of a corresponding water injection layer outside the artificial well by the silicon piezoresistive pressure sensor;
step two: opening an external valve to enable water to flow into the pipe column, enabling water flow to flow into the pipe column at the next end through an inner pipe in an outer barrel when the water flow passes through a flow adjusting mechanism, enabling the water flow to flow out to a position between two sealing partition plates on the outer side of the inner pipe through a main flow port while flowing through the inner pipe, enabling the water flow to flow out to the inside of a man-made well on the outer side of the pipe column after sequentially passing through a second connecting port, a first connecting port and a branch flow port, filling the water flow into a position between two packers, and enabling the water flow to flow out through a drainage mechanism and a water injection port;
step three: when one of the silicon piezoresistive pressure sensors detects that the pressure of a corresponding water injection layer outside the artificial well is small, the water injection amount of the corresponding water injection layer needs to be reduced, at the moment, a PLC controller controls a motor to start, the motor drives a gear to rotate so as to drive a rotating plate to rotate, the overlapping area of a second connecting port and a first connecting port is gradually reduced after the rotating plate rotates, so that the water yield is controlled to be reduced, when the pressure of the water injection layer is large, the overlapping area of the second connecting port and the first connecting port is increased through reverse operation, and the water yield is controlled to be increased;
step four: when water flow in the second step is filled into the packer, the water flow flows into the two water inlets on one side of the connecting block, pushes the blocking balls open and flows into the connecting channel, then flows into the water outlet through the connecting channel, and flows out of the artificial well from the water injection port after being filtered by the filter screen to inject water into the water injection layer of the oil field;
step five: when water flow with larger pressure outside the artificial well flows back into the water outlet through the water inlet, the filter screen filters silt in the water flow, meanwhile, the water flow flows into the connecting channel through the water outlet and flows into the water inlet, and the blocking ball loses the water flow impact of the water inlet, so that the water flow rebounds to the water inlet through the elasticity of the second spring, and the water inlet is blocked until the water pressure inside the artificial well is larger than the water pressure outside the artificial well;
step six: when the water-logging is in the backward flow state in drainage mechanism, the filter screen incurving, when drainage mechanism is in outside water injection state, the filter screen incurving, the time of the rivers backward flow in drainage mechanism simultaneously, rivers can drive the sliding sleeve and inwards slide, first spring cushions the sliding sleeve simultaneously, avoid silt to break through the filter screen, in the twinkling of an eye of the rivers reinjection water in drainage mechanism, rivers impact the sliding sleeve and outwards slide, and kick-back through first spring drives the sliding sleeve and slides repeatedly, and then drive the filter screen vibrations, shake its outside attached silt and fall, guarantee the unblocked of rivers.
Compared with the prior art, the invention has the beneficial effects that:
1. the flow regulating mechanism is matched with a corresponding silicon piezoresistive pressure sensor for use, so that the water flow of different water injection layers can be controlled independently;
2. the screening and filtering assembly in the drainage mechanism is convenient for better filtering the water flow at the water outlet, prevents silt from entering the artificial well during backflow, and simultaneously can shake off the silt attached to the outer side of the artificial well through the vibration of the filter screen to ensure the smoothness of the water flow;
3. through the backflow prevention assembly in the drainage mechanism, the water inlet can be blocked through the blocking ball when backflow occurs in the water outlet, water injection backflow is prevented, and silt is prevented from entering the artificial well.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic view of the installation structure of the rotating plate and the fixed plate according to the present invention;
FIG. 5 is a schematic view of the internal structure of the drainage mechanism of the present invention;
fig. 6 is a schematic view of the drainage mechanism of the present invention.
In the figure: 1. a man-made well; 2. a pipe string; 3. a packer; 4. a flow rate adjusting mechanism; 41. an outer cylinder; 42. A first joint; 43. a second joint; 44. an inner tube; 45. sealing the partition plate; 46. a limiting ring; 47. a main flow port; 48. an electromagnetic flow meter; 49. a rotating plate; 410. a fixing plate; 411. a first connection port; 412. A second connection port; 413. a tooth socket; 414. a motor; 415. a gear; 416. a branch port; 417. a PLC controller; 5. a water injection port; 6. a drainage mechanism; 61. connecting blocks; 62. a water inlet; 63. a connecting channel; 64. a water outlet; 65. a screen assembly; 651. a sliding sleeve; 652. a chute; 653. a slide bar; 654. a first spring; 655. filtering with a screen; 66. a backflow prevention assembly; 661. a side groove; 662. a second spring; 663. blocking the ball; 7. silicon piezoresistive pressure sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides an intelligence layering water injection is with layering flow control device, includes:
the artificial well 1, the artificial well 1 is laid in the oil field underground;
the pipe column 2 penetrates through the middle part of the interior of the artificial well 1, and the pipe column 2 is used for cable laying and water supply circulation;
the packer 3 is sleeved on the outer side of the pipe column 2 at equal intervals, and a single water injection layer is formed between every two adjacent packers 3;
the flow adjusting mechanism 4 is arranged in the middle of the pipe column 2 and between the adjacent packers 3, and the flow adjusting mechanism 4 is used for detecting and controlling the water injection flow;
the water injection ports 5 are formed in the outer side of the pipe column 2 and are positioned between the adjacent packers 3 at equal intervals;
the drainage mechanism 6 is arranged on the inner side of the artificial well 1 and at a position which is attached to the water injection port 5, and the drainage mechanism 6 is used for preventing water injection from flowing back and preventing silt from entering the artificial well 1;
the layered flow regulating device for intelligent layered water injection further comprises:
the artificial well comprises a silicon piezoresistive pressure sensor 7, wherein the silicon piezoresistive pressure sensor 7 is arranged on the inner side of the artificial well 1 and at the bottom of the packer 3, and the detection end of the silicon piezoresistive pressure sensor 7 penetrates through the artificial well 1 to detect the pressure on the outer side of the artificial well 1.
In some embodiments of the present invention, the flow rate adjusting mechanism 4 includes:
the outer cylinder 41 is arranged in the middle of the pipe column 2 and between the adjacent packers 3;
a first joint 42, wherein the first joint 42 is arranged at the top of the outer cylinder 41;
a second joint 43, wherein the second joint 43 is arranged at the bottom of the outer cylinder 41, and the outer cylinder 41 is in threaded connection with the pipe column 2 through the first joint 42 and the second joint 43;
an inner pipe 44, the inner pipe 44 is arranged in the outer cylinder 41 and used for water circulation;
the sealing partition plate 45 is symmetrically sleeved on the outer side of the inner tube 44, and the sealing partition plate 45 is used for sealing a gap between the inner tube 44 and the outer tube 41;
a limiting ring 46, wherein the limiting ring 46 is fixedly connected to the end, which is located far away from the sealing partition plate 45, of the inner wall of the outer cylinder 41, the limiting ring 46 is fixedly connected with the sealing partition plate 45, and the limiting ring 46 is used for further reinforcing the sealing partition plate 45;
a main flow port 47 is formed at the position, which is positioned on the upper side between the two sealing partition plates 45, outside the inner pipe 44 and is used for guiding water flow to flow out from the inner pipe 44;
an electromagnetic flowmeter 48, wherein the top of one of the sealing partition plates 45 is provided with the electromagnetic flowmeter 48, and the detection end of the electromagnetic flowmeter 48 extends into the main flow port 47 to detect the water flow in the main flow port 47;
a rotating plate 49, wherein the rotating plate 49 is arranged at the inner side of the outer cylinder 41 and at the position which is higher than the position between the two sealing partition plates 45;
a fixed plate 410, the fixed plate 410 is fixedly connected to the bottom of the rotating plate 49 inside the outer cylinder 41, and the rotating plate 49 is rotatably connected with the fixed plate 410;
the first connection ports 411 are formed in the fixing plate 410 at equal intervals;
the second connectors 412 are equidistantly arranged in the rotating plate 49, the first connectors 411 are matched with the second connectors 412 in size, and the first connectors 411 and the second connectors 412 are used for forming water flow channels with adjustable sizes for water flow;
the tooth groove 413 is formed in the top of the inner side of the rotating plate 49;
a motor 414, wherein the motor 414 is fixedly arranged on one side of the inner wall of the outer cylinder 41;
the output shaft of the motor 414 extends to the bottom of the seal partition plate 45 and is fixedly connected with a gear 415, and the gear 415 is meshed with the rotating plate 49;
the branch ports 416 are formed in the outer side of the outer barrel 41 and are located at the lower position between the two sealing partition plates 45 at equal intervals, and the branch ports 416 are matched with the corresponding silicon piezoresistive pressure sensors 7 through the flow regulating mechanism 4, so that the water flow of different water injection layers can be controlled independently.
In some embodiments of the present invention, the branch ports 416 are arranged in a ring shape, and the number and the positions of the branch ports 416 match with those of the first connection ports 411.
In some embodiments of the present invention, the flow rate adjusting mechanism 4 further includes:
a PLC controller 417, the PLC controller 417 being fixedly attached to the inside of the outer cylinder 41, the PLC controller 417 being configured to control the motor 414.
In some embodiments of the present invention, the drainage mechanism 6 includes:
the connecting block 61 is fixedly arranged at the position, which is close to the water injection port 5, on the inner side of the artificial well 1;
the water inlet 62 is symmetrically formed in one side, away from the water injection port 5, of the connecting block 61, and the connecting block 61 is used for enabling water to flow into the connecting block 61 and be discharged out of the artificial well 1;
the connecting channel 63 is formed in the middle of the inside of the connecting block 61, the connecting channel 63 is formed in the middle of the inside of the connecting block, and two ends of the connecting channel 63 are communicated with the two water inlets 62;
a water outlet 64 is formed in one end, close to the water filling port 5, of the connecting block 61, and the water outlet 64 is communicated with the water filling port 5;
the screening assembly 65 is arranged inside the water outlet 64, and the screening assembly 65 is used for preventing silt from blocking the water outlet 64;
the backflow preventing assembly 66 is arranged inside the connecting block 61 and located on one side of the water inlet 62, and the backflow preventing assembly 66 is used for preventing water from flowing backwards.
In some embodiments of the present invention, the screen assembly 65 comprises:
the sliding sleeve 651 is slidably arranged inside the water outlet 64;
the sliding grooves 652 are formed in the connecting block 61 and positioned at the upper side and the lower side of the water outlet 64;
the sliding rod 653 is fixedly provided with a sliding rod 653 inside the sliding chute 652, and the sliding sleeve 651 slides through the sliding rod 653;
the first springs 654 are sleeved outside the sliding rods 653 and on both sides of the sliding sleeve 651, and are used for buffering the sliding of the sliding sleeve 651;
filter screen 655 is installed to the inboard of filter sleeve 651, is used for filtering rivers and prevents that silt from entering artificial well 1 in, drainage mechanism 6 sieves subassembly 65 and is the spherical surface structure, strains subassembly 65 through the sieve and be convenient for better rivers to delivery port 64 and filter, silt gets into artificial well 1 when preventing the backward flow in, can also shake through filter screen 655 and fall its outside adnexed silt simultaneously, guarantees the unblocked of rivers.
In some embodiments of the present invention, the backflow prevention assembly 66 includes:
the side grooves 661 are formed in the connecting block 61 and located on one side of the water inlet 62;
a second spring 662, wherein one end of the inner wall of the side groove 661 is fixedly connected with the second spring 662;
stifled ball 663, the one end fixedly connected with stifled ball 663 that second spring 662 is close to water inlet 62, and stifled ball 663 and water inlet 62 are located same horizontal plane, and the size of stifled ball 663 is greater than water inlet 62, and water inlet 62 is used for carrying out the shutoff to water inlet 62 when forming the backward flow in connecting block 61, can pass through stifled ball 663 when making the backward flow take place in the delivery port 64 through preventing backflow subassembly 66 and block water inlet 62, prevents the backward flow of water injection and prevents that silt from getting into the artificial well.
In some embodiments of the present invention, the silicon piezoresistive pressure sensor 7 and the motor 414 in the same water injection layer are electrically connected to a corresponding PLC controller 417, and the PLC controller 417 is electrically connected to an external control center through a cable in the pipe string 2, so as to facilitate better control of the equipment.
The invention also provides a use method of the layered flow regulating device for intelligent layered water injection, which comprises the following steps:
the method comprises the following steps: laying the artificial well 1 and the pipe column 2 to an underground designated position of an oil field, electrifying the silicon piezoresistive pressure sensor 7, the motor 414 and the PLC 417 through a cable in the pipe column 2, and simultaneously detecting the pressure of a corresponding water injection layer outside the artificial well 1 by the silicon piezoresistive pressure sensor 7;
step two: opening an external valve to enable water to flow in the pipe column 2, enabling water to flow into the pipe column 2 at the next end through the inner pipe 44 in the outer cylinder 41 when passing through the flow regulating mechanism 4, enabling the water to flow out to the position between the two sealing partition plates 45 on the outer side of the inner pipe 44 through the main flow port 47 while flowing through the inner pipe 44, enabling the water to flow out to the inside of the artificial well 1 on the outer side of the pipe column 2 after sequentially passing through the second connecting port 412, the first connecting port 411 and the branch flow port 416, filling the water to the position between the two packers 3, and enabling the water to flow out through the drainage mechanism 6 and the water injection port 5;
step three: when one of the silicon piezoresistive pressure sensors 7 detects that the pressure of a corresponding water injection layer outside the artificial well 1 is small, the water injection amount of the corresponding water injection layer needs to be reduced, at the moment, the PLC 417 controls the motor 414 to start, the motor 414 drives the gear 415 to rotate, and further drives the rotating plate 49 to rotate, the overlapping area of the second connecting port 412 and the first connecting port 411 is gradually reduced after the rotating plate 49 rotates, so that the water yield is controlled to be reduced, and when the pressure of the water injection layer is large, the overlapping area of the second connecting port 412 and the first connecting port 411 is increased through reverse operation, so that the water yield is controlled to be increased;
step four: when water flow is filled into the packer 3 in the second step, the water flow flows into the two water inlets 62 on one side of the connecting block 61, pushes the blocking ball 663 open and flows into the connecting channel 63, then flows into the water outlet 64 through the connecting channel 63, flows out of the artificial well 1 from the water injection port 5 after being filtered by the filter screen 655 and is used for injecting water into the water injection layer of the oil field;
step five: when water flow with larger pressure outside the artificial well 1 flows back into the water outlet 64 through the water inlet 5, the filter screen 655 filters silt in the water flow, meanwhile, the water flow flows into the connecting channel 63 through the water outlet 64 and flows into the water inlet 62, and the blocking ball 663 loses water flow impact of the water inlet 62, so that the water flow rebounds to the water inlet 62 through the elasticity of the second spring 662 to block the water inlet 62 until the water pressure inside the artificial well 1 is larger than the water pressure outside the artificial well 1;
step six: when water in the drainage mechanism 6 is in a backflow state, the filter screen 655 bends inwards, when the drainage mechanism 6 is in an outward water injection state, the filter screen 655 bends outwards, and meanwhile when water in the drainage mechanism 6 flows backwards, the water can drive the sliding sleeve 651 to slide inwards, meanwhile, the first spring 654 buffers the sliding sleeve 651, so that the filter screen 655 is prevented from being broken by silt, and at the moment when the water in the drainage mechanism 6 is refilled, the water impacts the sliding sleeve 651 to slide outwards, and drives the sliding sleeve 651 to slide repeatedly through the rebounding of the first spring 654, so that the filter screen 655 is driven to vibrate, silt attached to the outer side of the filter screen is shaken off, and the smoothness of the water flow is ensured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides an intelligence layering is layering flow control device for water injection which characterized in that includes:
the artificial well (1), the said artificial well (1) is laid in the oil field underground;
the pipe column (2) penetrates through the middle part of the interior of the artificial well (1), and the pipe column (2) is used for cable laying and water supply circulation;
the packer (3) is sleeved on the outer side of the pipe column (2) at equal intervals, and a single water injection layer is formed between every two adjacent packers (3);
the flow regulating mechanism (4) is arranged in the middle of the pipe column (2) and between the adjacent packers (3), and the flow regulating mechanism (4) is used for detecting and controlling the water injection flow;
the water injection ports (5) are formed in the outer side of the pipe column (2) and are positioned between the adjacent packers (3) at equal intervals;
the drainage mechanism (6) is arranged on the inner side of the artificial well (1) and at a position which is attached to the water injection port (5), and the drainage mechanism (6) is used for preventing water injection backflow and preventing silt from entering the artificial well (1);
the layered flow regulating device for intelligent layered water injection further comprises:
silicon piezoresistive pressure sensor (7), silicon piezoresistive pressure sensor (7) are installed to the inboard of artificial well (1) and the bottom that is located packer (3), the outside pressure to artificial well (1) is detected after artificial well (1) is run through to the sense terminal of silicon piezoresistive pressure sensor (7).
2. The stratified flow control device for intelligent stratified water injection as claimed in claim 1, wherein the flow control mechanism (4) comprises:
the outer cylinder (41) is arranged in the middle of the pipe column (2) and between the adjacent packers (3);
the first joint (42), the said first joint (42) locates the top of the outer cylinder (41);
the second joint (43) is arranged at the bottom of the outer cylinder (41), and the outer cylinder (41) is in threaded connection with the pipe column (2) through the first joint (42) and the second joint (43);
an inner pipe (44) is arranged in the outer cylinder (41) and used for water circulation;
the sealing partition plate (45) is symmetrically sleeved on the outer side of the inner pipe (44), and the sealing partition plate (45) is used for sealing a gap between the inner pipe (44) and the outer cylinder (41);
the inner wall of the outer barrel (41) is located at one end, far away from the sealing partition plate (45), of the outer barrel, the limiting ring (46) is fixedly connected with the end, far away from the sealing partition plate (45), of the inner wall of the outer barrel (41), the limiting ring (46) is fixedly connected with the sealing partition plate (45), and the limiting ring (46) is used for further reinforcing the sealing partition plate (45);
the main flow port (47) is formed in the position, which is located on the upper side between the two sealing partition plates (45), on the outer side of the inner pipe (44) and used for guiding water flow to flow out of the inner pipe (44);
the electromagnetic flow meter (48) is mounted on the top of one sealing partition plate (45), and the detection end of the electromagnetic flow meter (48) extends to the interior of the main flow port (47) to detect the water flow in the main flow port (47);
the rotating plate (49) is arranged on the inner side of the outer cylinder (41) and is positioned on the upper part between the two sealing partition plates (45);
the fixing plate (410) is fixedly connected to the bottom of the rotating plate (49) on the inner side of the outer cylinder (41), and the rotating plate (49) is rotatably connected with the fixing plate (410);
the fixing plate (410) is internally provided with first connecting ports (411) at equal intervals;
the second connecting ports (412) are equidistantly formed in the rotating plate (49), the first connecting ports (411) are matched with the second connecting ports (412) in size, and the first connecting ports (411) and the second connecting ports (412) are used for forming water flow channels with adjustable sizes for water flow;
the top of the inner side of the rotating plate (49) is provided with a tooth groove (413);
the motor (414), the motor (414) is fixedly installed on one side of the inner wall of the outer cylinder (41);
the output shaft of the motor (414) extends to the bottom of the sealing partition plate (45) and is fixedly connected with a gear (415), and the gear (415) is meshed with the rotating plate (49);
and the branch flow ports (416) are formed in the outer side of the outer cylinder (41) and are positioned at the lower position between the two sealing partition plates (45) at equal intervals.
3. The device for regulating the stratified flow for intelligent stratified water injection as claimed in claim 1, wherein the branch ports (416) are arranged in a ring shape, and the number and the positions of the branch ports (416) are matched with those of the first connection ports (411).
4. The zonal flow regulation device for intelligent zonal injection according to claim 3, wherein the flow regulation mechanism (4) further comprises:
and a PLC (417), wherein the PLC (417) is fixedly installed on the inner side of the outer cylinder (41), and the PLC (417) is used for controlling the motor (414).
5. The device for regulating the stratified flow for intelligent stratified water injection as claimed in claim 1, wherein said drainage mechanism (6) comprises:
the connecting block (61) is fixedly arranged at the position, which is on the inner side of the artificial well (1) and is attached to the water injection port (5), of the connecting block (61);
the water inlet (62) is symmetrically formed in one side, away from the water injection port (5), of the connecting block (61), and the connecting block (61) is used for enabling water to flow into the connecting block (61) and be discharged out of the artificial well (1);
the connecting channel (63) is formed in the middle of the inside of the connecting block (61), and two ends of the connecting channel (63) are communicated with the two water inlets (62);
the water outlet (64) is formed in one end, close to the water filling port (5), of the connecting block (61), and the water outlet (64) is communicated with the water filling port (5);
the screening assembly (65) is arranged inside the water outlet (64), and the screening assembly (65) is used for preventing silt from blocking the water outlet (64);
the anti-backflow component (66), the inside of connecting block (61) and the one side that is located water inlet (62) all are equipped with anti-backflow component (66), anti-backflow component (66) are used for preventing the water injection backward flow.
6. The device for regulating the stratified flow for intelligent stratified water injection as claimed in claim 5, wherein said screening assembly (65) comprises:
the sliding sleeve (651) is arranged inside the water outlet (64) in a sliding manner;
the sliding grooves (652) are formed in the connecting block (61) and positioned on the upper side and the lower side of the water outlet (64);
the sliding rod (653) is fixedly arranged inside the sliding groove (652), and the sliding sleeve (651) slides through the sliding rod (653);
the first spring (654) is sleeved on the outer side of the sliding rod (653) and positioned on both sides of the sliding sleeve (651) and used for buffering the sliding of the sliding sleeve (651);
the filter screen (655), filter screen (655) are installed to the inboard of sliding sleeve (651) for in filtering the artificial well (1) of preventing that silt from getting into to rivers, drainage mechanism (6) sieve filter subassembly (65) are spherical structure.
7. The device for regulating the stratified flow for intelligent stratified water injection as claimed in claim 6, wherein said backflow prevention assembly (66) comprises:
the side grooves (661) are formed in the connecting block (61) and located on one side of the water inlet (62);
a second spring (662), wherein one end of the inner wall of the side groove (661) is fixedly connected with the second spring (662);
the water inlet device comprises a blocking ball (663), one end, close to the water inlet (62), of the second spring (662) is fixedly connected with the blocking ball (663), the blocking ball (663) and the water inlet (62) are located on the same horizontal plane, the size of the blocking ball (663) is larger than that of the water inlet (62), and the water inlet (62) is used for blocking the water inlet (62) when backflow is formed in the connecting block (61).
8. The zonal flow regulation apparatus for intelligent zonal injection of water according to claim 6, characterized in that the silicon piezoresistive pressure sensor (7) and the motor (414) in the same water injection layer are electrically connected with corresponding PLC controllers (417), and the PLC controllers (417) are electrically connected with an external control center through cables in the pipe column (2).
9. The use method of the stratified flow control device for intelligent stratified water injection as claimed in claim 8, characterized by comprising the following steps:
the method comprises the following steps: laying the artificial well (1) and the pipe column (2) to an underground designated position of an oil field, electrifying the silicon piezoresistive pressure sensor (7), the motor (414) and the PLC (417) through a cable in the pipe column (2), and simultaneously detecting the pressure of a corresponding water injection layer on the outer side of the artificial well (1) by the silicon piezoresistive pressure sensor (7);
step two: an external valve is opened to lead water to flow in the pipe column (2), when water flows through the flow regulating mechanism (4), the water flows into the pipe column (2) at the lower end through the inner pipe (44) in the outer cylinder (41), flows out to the position between two sealing partition plates (45) at the outer side of the inner pipe (44) through the main flow port (47) while flowing through the inner pipe (44), flows out to the inside of the artificial well (1) at the outer side of the pipe column (2) after sequentially passing through the second connecting port (412), the first connecting port (411) and the branch flow port (416), is filled between two packers (3), and then flows out through the drainage mechanism (6) and the water injection port (5);
step three: when one of the silicon piezoresistive pressure sensors (7) detects that the pressure of a corresponding water injection layer outside the artificial well (1) is small, the water injection amount of the corresponding water injection layer needs to be reduced, at the moment, the motor (414) is controlled to be started through the PLC (417), the motor (414) drives the gear (415) to rotate, and further drives the rotating plate (49) to rotate, the overlapping area of the second connecting port (412) and the first connecting port (411) is gradually reduced after the rotating plate (49) rotates, so that the water yield is controlled to be reduced, and when the pressure of the water injection layer is large, the overlapping area of the second connecting port (412) and the first connecting port (411) is increased through reverse operation, and the water yield is controlled to be increased;
step four: when water flow is filled into the packer (3) in the second step, the water flow flows into the two water inlets (62) on one side of the connecting block (61), pushes the blocking ball (663) open and flows into the connecting channel (63), then flows into the water outlet (64) through the connecting channel (63), and flows out of the artificial well (1) from the water injection port (5) after being filtered by the filter screen (655) to inject water into the water injection layer of the oil field;
step five: when water flow with large pressure outside the artificial well (1) flows back to the water outlet (64) through the water filling port (5), the filter screen (655) filters silt in the water flow, meanwhile, the water flow flows into the connecting channel (63) through the water outlet (64) and flows into the water inlet (62), and the blocking ball (663) loses water flow impact of the water inlet (62), so that the water flow rebounds to the water inlet (62) through the elasticity of the second spring (662), and blocks the water inlet (62) until the water pressure inside the artificial well (1) is greater than the water pressure outside the artificial well (1);
step six: when water in the drainage mechanism (6) is in a backflow state, the filter screen (655) is bent inwards, when the drainage mechanism (6) is in an outward water injection state, the filter screen (655) is bent outwards, and meanwhile when water in the drainage mechanism (6) flows backwards, the water can drive the sliding sleeve (651) to slide inwards, the first spring (654) buffers the sliding sleeve (651) at the same time, so that the filter screen (655) is prevented from being broken by silt, and at the moment of water re-injection in the drainage mechanism (6), the water impacts the sliding sleeve (651) to slide outwards, and drives the sliding sleeve (651) to slide repeatedly through resilience of the first spring (654), so that the filter screen (655) is driven to vibrate, silt attached to the outer side of the filter screen is vibrated, and smoothness of the water flow is guaranteed.
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| CN114151052B (en) | 2023-06-06 |
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