CN106939781B - Self-adaptive flow control device for oil-gas well - Google Patents
Self-adaptive flow control device for oil-gas well Download PDFInfo
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- CN106939781B CN106939781B CN201710263278.1A CN201710263278A CN106939781B CN 106939781 B CN106939781 B CN 106939781B CN 201710263278 A CN201710263278 A CN 201710263278A CN 106939781 B CN106939781 B CN 106939781B
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- pipe
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- oil
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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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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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 self-adaptive flow control device for an oil-gas well, which comprises a base pipe and an outer sleeve sleeved on the base pipe, wherein a space is formed between the outer wall of the base pipe and the inner wall of the outer sleeve, threads are arranged at two ends of the base pipe and are connected with the oil-gas pipe, an overflow hole is formed in the base pipe in the space where one end of the outer sleeve is located, a fixed pipe hole is formed in the outer sleeve, a movable pipe is embedded in the fixed pipe hole, the movable pipe can axially move in the fixed pipe hole, a fixed magnetic unit is arranged at one end of the fixed pipe hole, a movable magnetic unit is arranged at one end of the movable pipe, and the magnetic poles of the fixed magnetic unit and the movable magnetic unit are identical. The flow control device can be used for oil wells and gas wells, can automatically adjust the flow resistance coefficient, can overcome the defect that the traditional device fails after water is discharged from a shaft, automatically adjusts the pressure drop according to the actual condition in the well, eliminates the toe following effect, balances the inflow profile, improves the final recovery ratio of oil gas, and has simple structure and strong erosion resistance.
Description
Technical Field
The invention relates to oil and gas field development equipment, in particular to a self-adaptive flow control device for an oil and gas well.
Background
In a well with a complex structure, particularly in a horizontal well, due to non-uniformity of a reservoir, heel toe effect is commonly existed in a development process, so that water cone and gas cone appear in the well, water is finally discharged prematurely, and recovery ratio is seriously reduced. To solve the above problems, common methods include variable density perforation and segmented perforation completions, variable density screen completions, and base pipe completions. However, these methods have limitations in controlling the inflow profile, and cannot ensure that the production profile is sufficiently uniform.
In recent years, different types of Inflow Control Devices (ICDs) have been developed at home and abroad successively, mainly including two types of Adaptive Inflow Control Devices (AICD) and Passive Inflow Control Devices (PICDs). The flow control of the Passive Inflow Control Device (PICD) cannot be changed, and the PICD is only used in a non-water-yielding oil well, and once water is discharged from the well, the well can fail, so that the oil well yield is reduced. Currently available Adaptive Inflow Control Devices (AICD) mainly include balancing plates, floating discs, and flow channel type adaptive inflow control devices, in which a movable balancing plate is prone to malfunction and cannot effectively control a water cone. The floating disc has complex structure, difficult processing, poor shock resistance and easy damage. The viscosity application range of the flow channel AICD is small, and the flow channel AICD needs to be specially designed for different reservoir conditions. Meanwhile, the above Adaptive Inflow Control Devices (AICD) have the disadvantage of poor erosion resistance.
Disclosure of Invention
The invention aims at: aiming at the problems, the self-adaptive flow control device for the oil and gas well is provided, can be used for oil wells and gas wells, can automatically adjust the flow resistance coefficient, can overcome the defect that the traditional device fails after the water is discharged from the well shaft, automatically adjusts the pressure drop according to the actual condition in the well, eliminates the toe following effect, balances the inflow profile, improves the final recovery ratio of oil gas, and has simple structure and strong erosion resistance.
The technical scheme adopted by the invention is as follows:
the utility model provides a self-adaptation accuse flow device for oil gas well, includes the outer tube that overlaps on base pipe and the base pipe, forms the space between base pipe outer wall and the outer tube inner wall, and wherein base pipe both ends set up the screw thread and are connected with the oil gas pipe, the overflow hole has been seted up on the base pipe in the space that outer tube one end was located, be provided with fixed tube hole in the outer tube, fixed tube hole embeds establishes movable tube, and movable tube can follow axial action in fixed tube hole, and fixed tube hole's one end is provided with fixed magnetic unit, and movable tube's one end is provided with movable magnetic unit, and fixed magnetic unit is the same with movable magnetic unit's magnetic pole, and two magnetic unit magnetism in this scheme are selected according to well bottom flow size.
In a further technical scheme, a seal is formed between one end of the movable pipe, which is provided with the movable magnetic unit, and the inner wall of the fixed pipe hole, and a seal is formed between one end of the fixed pipe, which is provided with the fixed magnetic unit, and the outer wall of the movable pipe.
In a further technical scheme, a water-swelling unit is arranged in the movable pipe and swells radially along the inner wall of the movable pipe after contacting water.
In a further technical scheme, one end of the movable pipe is provided with a movable magnetic unit, and when the movable pipe axially moves in the fixed pipe hole, the other end of the movable pipe penetrates through the fixed pipe hole to be provided with one end of the fixed magnetic unit.
In a further technical scheme, the inner wall of the outer sleeve is provided with a movable pipe guide groove, and when one end of the movable pipe extends out of the fixed pipe hole, the movable pipe moves along the movable pipe guide groove.
In a further technical scheme, the fixed pipe holes are multiple and distributed along the circumferential direction of the outer sleeve.
In a further technical scheme, the movable pipe guide grooves are distributed along the circumferential direction of the outer sleeve and correspond to the fixed pipe holes provided with the movable pipes.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
the self-adaptive flow control device provided by the invention can be simultaneously used in oil wells and gas wells, and has wide application range; the invention provides a combination of a magnetic coupling technology and a water-swelling material technology, can make more agile reaction to the change of the flowing state of underground fluid, has wide viscosity application range, achieves the effect of real-time flow control, effectively prevents the occurrence of water cone gas cone, and improves the final recovery ratio; the self-adaptive flow control device has the advantages of simple structure, high structural strength, strong anti-blocking capability and strong anti-erosion capability.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention, i.e., a schematic cross-sectional view taken along the direction B-B in FIG. 2;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a bottom view of the present invention;
FIG. 4 is a schematic view of a base pipe according to the present invention;
FIG. 5 is a schematic view of the structure of the outer sleeve according to the present invention;
FIG. 6 is a schematic view of a movable tube according to the present invention;
FIG. 7 is a schematic diagram of the operation of the present invention in each state;
the marks in the figure: 1. a base pipe; 2. An outer sleeve; 3. An overflow hole;
4. a movable pipe guide groove; 5. A fixed magnetic unit; 6. A movable tube;
7. a water-swellable unit; 8. A movable magnetic unit; 9 is a thread;
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-5, the invention comprises a base pipe, an outer sleeve, a movable pipe, a movable magnetic unit and a fixed magnetic unit, wherein two ends of the base pipe are connected with an oil gas pipe through connecting threads, an overflow hole is formed at one end of the base pipe, the outer sleeve is sleeved and fixed on the base pipe, two ends of the outer sleeve are in closed connection with the outer wall of the base pipe, a certain space is formed between the inner wall of the outer sleeve and the outer wall of the base pipe, the movable pipe is inlaid in the fixed pipe hole formed on the outer sleeve and can axially move along the fixed pipe hole and the two ends are in closed connection, the fixed magnetic unit is inlaid at one end of the fixed pipe hole of the outer sleeve, the movable magnetic unit is inlaid at one end of the movable pipe, and the movable magnetic unit and the fixed magnetic unit have the same magnetic poles. The structure of this embodiment has adopted the magnetic coupling technique, adopts the movable magnetic unit and the fixed magnetic unit of the same magnetic pole, sets up the tip at movable tube and fixed tube hole respectively, utilizes the interact between two magnetic units to make movable tube atress be in balanced state, and thereby can keep on maintaining balanced state through the motion adjustment distance between two magnetic units of movable tube under the circumstances that the atress changes when the movable tube, through the action real-time variation of movable tube, can make more swift reaction to the fluid flow state change in the pit, viscosity application scope is wide, reaches real time control effect of flowing, very effectively prevents the appearance of water cone gas cone, improves final recovery ratio.
Furthermore, when the magnetic coupling technology is utilized, the water-swelling material technology is matched, namely, the water-swelling unit is arranged on the inner wall of the movable pipe, when water-containing fluid flows into the shaft, the water-swelling unit swells along the radial direction when water, the pipe diameter of the water-swelling unit is reduced after radial expansion, the local resistance to the fluid is increased, and the pressure drop of the fluid is increased. The greater the water content, the greater the expansion of the water-swellable element and the greater the local resistance to the fluid, at which point the total tube length is determined by the combination of the water content and the flow rate of the fluid, the total tube length being the fixed tube bore length plus the movable tube length minus the overlap length of the two. Namely, the physical principle of the invention is that: the path resistance in combination with the local resistance adjusts the pressure drop across the tube.
In this embodiment, as shown in FIG. 4, the diameter of the flowbore provided at one end of the base pipe is determined by the actual well flow. As shown in fig. 5, the fixed tube holes are distributed along the circumferential direction of the outer sleeve, the fixed magnetic units are embedded at one end of the fixed tube holes, and the movable tube guide grooves are distributed along the circumferential direction of the outer sleeve. Further, as shown in fig. 6, the movable magnetic unit is embedded at one end of the movable tube, and the water-swelling units are axially distributed on the inner wall of the movable tube along the movable tube.
In actual operation by the present invention, as shown in fig. 7, the operation states of the present invention include: an initial state; the action state is when no water is discharged from the bottom of the well; and (3) when water is discharged from the bottom of the well, the water is in an action state. The concrete description is as follows: when no fluid flows in the shaft, the self-adaptive flow control device keeps an initial state, the movable pipe is completely sleeved in the fixed pipe hole, and at the moment, the magnetic force between the movable magnetic unit and the fixed magnetic unit is minimum. When the water-free liquid flows into the shaft, the movable tube moves axially under the action of the fluid, the moving distance is determined by the flow, and one flow corresponds to one dynamic balance position. When the flow is larger than the flow, the movable pipe continues to move along the axial direction, the total pipe length is increased (the total pipe length refers to the length of the fixed pipe hole plus the length of the movable pipe minus the overlapping length of the fixed pipe hole and the movable pipe), the movable pipe drives the movable magnetic unit to move, the distance between the movable magnetic unit and the fixed magnetic unit is reduced, and the magnetic force is increased. When the flow is smaller than the flow, the movable pipe moves to shorten the length of the total pipe, the movable pipe drives the movable magnetic unit to move, the distance between the movable magnetic unit and the fixed magnetic unit is increased, and the magnetic force is reduced. When water-containing fluid flows into the well bore, the water-contacting expansion unit expands along the radial direction when contacting water, the pipe diameter at the expansion unit becomes smaller after radial expansion, the local resistance to the fluid becomes larger, and the fluid pressure drop is increased. The greater the water content, the greater the expansion of the water-swellable element and the greater the local resistance to the fluid, at which point the total tube length is determined by the fluid water content and flow combination. The movable pipe moves along the axial direction according to the water content and the flow, and is in a dynamic balance state under the action of friction force, fluid acting force and magnetic force.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The utility model provides a self-adaptation accuse flow device for oil gas well, includes outer tube (2) that cover was established on base pipe (1) and base pipe (1), forms the space between base pipe (1) outer wall and outer tube (2) inner wall, and wherein base pipe (1) both ends set up screw thread (9) and oil gas union coupling, overflow hole (3) have been seted up on base pipe (1) in the space that outer tube (2) one end is located, its characterized in that: a fixed pipe hole (10) is formed in the outer sleeve (2), a movable pipe (6) is embedded in the fixed pipe hole (10), the movable pipe (6) can axially move in the fixed pipe hole (10), a fixed magnetic unit (5) is arranged at one end of the fixed pipe hole (10), a movable magnetic unit (8) is arranged at one end of the movable pipe (6), and the magnetic poles of the fixed magnetic unit (5) and the movable magnetic unit (8) are the same;
a water-swelling unit (7) is arranged in the movable tube (6), and the water-swelling unit swells radially along the inner wall of the movable tube (6) after contacting water, and the pipe diameter of the water-swelling unit is reduced after the radial swelling;
the movable magnetic units and the fixed magnetic units with the same magnetic poles are respectively arranged at the end parts of the movable pipe and the fixed pipe hole, the stress of the movable pipe is in a balanced state by utilizing the interaction between the two magnetic units, and when the stress of the movable pipe is changed, the distance between the two magnetic units can be adjusted through the movement of the movable pipe so as to continuously maintain the balanced state, and the movement of the movable pipe is changed in real time, so that a more agile reaction can be made to the change of the flow state of underground fluid, the viscosity application range is wide, and the effect of real-time control flow is achieved; and
the magnetic coupling technology is utilized, and the water-swelling material technology is matched, namely, a water-swelling unit is arranged on the inner wall of the movable pipe, when water-containing fluid flows into a shaft, the water-swelling unit swells along the radial direction when water, the pipe diameter of the water-swelling unit becomes smaller after radial expansion, the local resistance to the fluid becomes larger, and the pressure drop of the fluid is increased; the greater the water content, the greater the expansion of the water-swellable element and the greater the local resistance to the fluid, at which point the total tube length is determined by the combination of the water content and the flow rate of the fluid, the total tube length being the fixed tube bore length plus the movable tube length minus the overlap length of the two.
2. An adaptive flow control device for an oil and gas well according to claim 1, wherein: the movable pipe is characterized in that a seal is formed between one end of the movable pipe (6) provided with the movable magnetic unit (8) and the inner wall of the fixed pipe hole (10), and a seal is formed between one end of the fixed pipe hole (10) provided with the fixed magnetic unit (5) and the outer wall of the movable pipe (6).
3. An adaptive flow control device for an oil and gas well according to claim 1 or 2, characterized in that: one end of the movable pipe (6) is provided with a movable magnetic unit (8), and when the movable pipe (6) axially moves in the fixed pipe hole (10), the other end of the movable pipe (6) passes through the fixed pipe hole (10) to be provided with one end of the fixed magnetic unit (5).
4. An adaptive flow control device for an oil and gas well according to claim 3, wherein: the inner wall of the outer sleeve (2) is provided with a movable pipe guide groove (4), and when one end of the movable pipe (6) extends out of the fixed pipe hole (10), the movable pipe moves along the movable pipe guide groove (4).
5. An adaptive flow control device for an oil and gas well as defined in claim 4, wherein: the fixed pipe holes (10) are distributed along the circumferential direction of the outer sleeve (2).
6. An adaptive flow control apparatus for an oil and gas well as defined in claim 5, wherein: the movable pipe guide grooves (4) are distributed along the circumferential direction of the outer sleeve (2) and correspond to the fixed pipe holes (10) provided with the movable pipes (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710263278.1A CN106939781B (en) | 2017-04-21 | 2017-04-21 | Self-adaptive flow control device for oil-gas well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710263278.1A CN106939781B (en) | 2017-04-21 | 2017-04-21 | Self-adaptive flow control device for oil-gas well |
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| CN106939781A CN106939781A (en) | 2017-07-11 |
| CN106939781B true CN106939781B (en) | 2023-05-26 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111022005B (en) * | 2018-10-10 | 2022-05-17 | 中国石油化工股份有限公司 | Variable flow channel type inflow control device, oil extraction nipple and production pipe string |
| CN111663924B (en) * | 2019-03-05 | 2022-09-27 | 中国石油化工股份有限公司 | Oil well water control and oil increasing device and method |
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| CN105331835A (en) * | 2015-10-11 | 2016-02-17 | 江西理工大学 | Auxiliary leaching agent applied to ion-absorbed rare earth ore leaching process and ore leaching method of auxiliary leaching agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5803178A (en) * | 1996-09-13 | 1998-09-08 | Union Oil Company Of California | Downwell isolator |
| US7891430B2 (en) * | 2007-10-19 | 2011-02-22 | Baker Hughes Incorporated | Water control device using electromagnetics |
| US20090101329A1 (en) * | 2007-10-19 | 2009-04-23 | Baker Hughes Incorporated | Water Sensing Adaptable Inflow Control Device Using a Powered System |
| US8210258B2 (en) * | 2009-12-22 | 2012-07-03 | Baker Hughes Incorporated | Wireline-adjustable downhole flow control devices and methods for using same |
| CN102485830A (en) * | 2010-12-02 | 2012-06-06 | 北京化工大学 | Profile control oil-displacement agent for core-shell type inorganic/organic polymer composite microballoon |
| CN103834375B (en) * | 2014-03-12 | 2016-02-17 | 中国石油大学(华东) | A kind of Oil/gas Well temporary plugging agent based on magnetic flow liquid and preparation method thereof and application |
| CN105649599A (en) * | 2016-03-14 | 2016-06-08 | 中国石油大学(北京) | Self-adaptable inflow control device for oil well |
| CN105888622B (en) * | 2016-06-12 | 2017-12-29 | 长江大学 | Automatic control water flow control sand control screen |
| CN206608149U (en) * | 2017-03-02 | 2017-11-03 | 中国石油大学(北京) | Self-adaptive controlled water pressure-bearing screen casing |
| CN206655683U (en) * | 2017-04-21 | 2017-11-21 | 西南石油大学 | A kind of adaptive flow control device for Oil/gas Well |
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|---|---|---|---|---|
| CN105331835A (en) * | 2015-10-11 | 2016-02-17 | 江西理工大学 | Auxiliary leaching agent applied to ion-absorbed rare earth ore leaching process and ore leaching method of auxiliary leaching agent |
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Effective date of registration: 20230601 Address after: No.8 Jiusheng Road, Yibin, Sichuan 644000 Patentee after: Yibin University Patentee after: SOUTHWEST PETROLEUM University Address before: 610500, Xindu Avenue, Xindu District, Sichuan, Chengdu, 8 Patentee before: SOUTHWEST PETROLEUM University |