CN115030696B - Oil well production layer blocking and production linkage controller - Google Patents
Oil well production layer blocking and production linkage controller Download PDFInfo
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- CN115030696B CN115030696B CN202110233021.8A CN202110233021A CN115030696B CN 115030696 B CN115030696 B CN 115030696B CN 202110233021 A CN202110233021 A CN 202110233021A CN 115030696 B CN115030696 B CN 115030696B
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- liquid inlet
- inlet hole
- oil well
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 78
- 239000003129 oil well Substances 0.000 title claims abstract description 74
- 230000000903 blocking effect Effects 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 86
- 238000005065 mining Methods 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 18
- 238000010008 shearing Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 230000000694 effects Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fats And Perfumes (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The application relates to an oil well production layer blocking and mining linkage controller, which comprises a hollow cylinder body, wherein an upper liquid inlet hole and a lower liquid inlet hole are formed in the side wall of the cylinder body at intervals, the lower liquid inlet hole is used for enabling production liquid of a lower layer section of an oil well to flow into the cylinder body, the upper liquid inlet hole is used for enabling production liquid of an upper layer section of the oil well to flow into the cylinder body, and the bottom of the cylinder body is connected with a blocking structure; an inner sliding sleeve structure is arranged in the cylinder body, and can be communicated with the lower liquid inlet hole and can slide downwards to block the lower liquid inlet hole under the sleeve pressing action; an outer sliding sleeve structure is sleeved on the outer wall of the cylinder body, the outer sliding sleeve structure can seal the upper liquid inlet hole and can move upwards to expose the upper liquid inlet hole, and the inner sliding sleeve structure and the outer sliding sleeve structure form a layer-changing switch part. The inner sliding sleeve structure and the outer sliding sleeve structure jointly form the layer-changing switch part, the switch opening information is clear and clear during layer changing, and the layer changing can be realized only by pressing once.
Description
Technical Field
The application relates to the technical field of sucker-rod pump oil extraction processes in oil exploitation, in particular to an oil well production layer blocking and extracting linkage controller.
Background
After the oil field is developed by water injection, the water content gradually rises after corresponding oil well takes effect, wherein the water strings of a certain interval are all high in water content, in order to improve the single well yield of the oil well, the water blocking technology is directly implemented for judging the water interval, and the water blocking of the high water interval is implemented after water is found when the water outlet interval is unknown, so that the purpose of dewatering and increasing oil is achieved.
In order to reduce the measure cost, a water finding and blocking pipe column is generally adopted on site, a water finding switch and a packer are lowered to a corresponding layer section, the water containing condition of each layer is found through layer-by-layer production. According to the different opening modes of the switch, the switch is divided into a mechanical water finding and blocking mode and an intelligent water finding and blocking mode, the intelligent water finding switch is an electronic switch, and the switch is automatically opened and closed, so that the switch cost is high. The switch that machinery was looked for water is hydraulic switch, relies on external pump truck to press and realizes that the switch opens and closes, and the switch cost of finding water is low, and these two kinds of switches all exist: when the layer is replaced, the ground has no clear information to judge whether the switch is closed or opened, so that the water and liquid supply capacity of the producing layer cannot be accurately judged in time. Meanwhile, the mechanical water finding and blocking switch is closed and opened by pressure control, and before layer replacement, the switch is closed and opened under the influence of pressure difference of upper and lower layers, so that the switch is easy to be in a disordered state, and the requirement of the oil field high water content oil well mechanical water finding and blocking technology cannot be met.
Therefore, the inventor provides an oil well production layer blocking and production linkage controller by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The application aims to provide an oil well production zone blocking and mining linkage controller, which overcomes the problems in the prior art.
The application aims to realize that an oil well production layer blocking and mining linkage controller comprises a hollow cylinder body, wherein an upper liquid inlet hole and a lower liquid inlet hole are formed in the side wall of the cylinder body at intervals, the lower liquid inlet hole is used for enabling production liquid of a lower layer section of an oil well to flow into the cylinder body, the upper liquid inlet hole is used for enabling production liquid of the upper layer section of the oil well to flow into the cylinder body, and the bottom of the cylinder body is connected with a blocking structure; an inner sliding sleeve structure is arranged in the cylinder body, can be communicated with the lower liquid inlet hole and can slide downwards to block the lower liquid inlet hole under the sleeve pressing action; an outer sliding sleeve structure is sleeved on the outer wall of the cylinder body, the outer sliding sleeve structure can block the upper liquid inlet hole and can move upwards to expose out of the upper liquid inlet hole, and the inner sliding sleeve structure and the outer sliding sleeve structure form a layer-changing switch part.
In a preferred embodiment of the present application, the inner sliding sleeve structure includes a hollow inner sleeve, a first plugging ball is disposed at the bottom of the inner sleeve, the first plugging ball can allow the production fluid to flow into the inner sleeve from bottom to top, a radially penetrating chute is disposed on a side wall of the inner sleeve, and the chute can be communicated with the upper fluid inlet; the inner sleeve can be fixed in the cylinder body through a shearing pin, and when the inner sleeve is fixed by the shearing pin, the lower liquid inlet hole can be communicated with the bottom of the inner sleeve; when the shearing pin is sheared, the inner sleeve can slide downwards along the inner wall of the cylinder body in a sealing way to seal the lower liquid inlet.
In a preferred embodiment of the present application, a track pin is disposed on a side wall of the cylinder body, the track pin is disposed protruding from an inner wall of the cylinder body, and the chute can axially slide along the track pin.
In a preferred embodiment of the present application, the outer sliding sleeve structure includes an outer sleeve sleeved on the outer wall of the cylinder body, a locking piece is slidably disposed on the side wall of the cylinder body in a radial direction, the locking piece can be extruded by the side wall of the inner sleeve to move radially outwards and protrude out of the outer wall of the cylinder body so as to fix the outer sleeve, and the outer sleeve can seal the upper liquid inlet hole when being fixed; when the inner sleeve moves downwards, the locking block radially retracts, and the outer sleeve moves upwards to expose the upper liquid inlet hole.
In a preferred embodiment of the present application, a first step portion with an increased diameter is disposed on the outer wall of the cylinder body above the shear pin, and a first spring is sleeved between the outer sliding sleeve and the first step portion on the cylinder body.
In a preferred embodiment of the present application, the outer wall of the inner sleeve above the chute and the inner wall of the cylinder body are disposed at intervals.
In a preferred embodiment of the application, a first sealing ring is arranged between the inner wall of the outer sleeve and the outer wall of the cartridge body.
In a preferred embodiment of the present application, the plugging structure includes a hollow inner connecting sleeve sleeved in the cylinder body and located below the lower liquid inlet, the bottom of the inner connecting sleeve is connected with a plug in a sealing manner, a limit sleeve is sleeved on the top of the inner side of the inner connecting sleeve, a second plugging ball is arranged at the bottom of the limit sleeve, a second spring is arranged at the bottom of the second plugging ball, the bottom end of the second spring abuts against the top end of the plug, and the second plugging ball can plug the inner connecting sleeve from bottom to top.
In a preferred embodiment of the present application, a second step portion with an increased diameter is disposed above the lower liquid inlet on the outer wall of the cylinder body, an outer connecting sleeve is sleeved on the outer wall of the second step portion, the lower liquid inlet and the plugging structure are located in the outer connecting sleeve, the bottom of the outer connecting sleeve is communicated with a lower joint, and the lower joint is used for connecting a lower oil pipe.
In a preferred embodiment of the application, the top of the cartridge body is connected to an upper fitting for connecting to an upper packer.
Therefore, the oil well production zone blocking and production linkage controller provided by the application has the following beneficial effects:
in the oil well production layer blocking and mining linkage controller provided by the application, the inner sliding sleeve structure and the outer sliding sleeve structure jointly form the layer changing switch part, when the layer is mined and changed, the upper liquid inlet hole and the lower liquid inlet hole are reliably closed and opened, the closing and the opening are simultaneously completed, and the phenomenon of unclear opening and closing is avoided; when the layers are replaced, the switch opening information is clear; the oil well production layer blocking and mining linkage controller provided by the application is simple in field operation, and the layer replacement can be realized only by pressing once; the oil well production layer blocking and mining linkage controller provided by the application has low cost, and the cost is about 1/20 of that of an electronic switch, so that the oil well production layer blocking and mining linkage controller is beneficial to popularization and use.
Drawings
The following drawings are only for purposes of illustration and explanation of the present application and are not intended to limit the scope of the application. Wherein:
fig. 1: the application discloses a structure schematic diagram of an oil well production layer blocking and production linkage controller.
Fig. 2: the application relates to a state diagram of an oil well production layer blocking and production linkage controller in the production of an oil well lower layer section.
Fig. 3: the application relates to a state diagram of an oil well production layer blocking and production linkage controller in the production of an upper layer section of an oil well.
In the figure:
100. oil well production layer blocking and production linkage controller;
1. a cartridge body;
11. an upper liquid inlet hole; 12. a lower liquid inlet hole; 13. track nails; 14. a first step portion; 15. a second step portion; 16. an outer connecting sleeve; 17. a lower joint; 18. an upper joint;
2. a plugging structure;
21. an inner connecting sleeve; 22. a plug; 23. a limit sleeve; 24. a second blocking ball; 25. a second spring;
3. an inner sliding sleeve structure;
31. an inner sleeve; 32. a first occlusion ball; 33. a chute channel;
4. an outer sliding sleeve structure; 41. an outer sleeve; 42. a locking piece;
5. shearing pins;
61. a first spring;
71. a first seal ring; 72. a second seal ring; 73. a third seal ring; 74. a fourth seal ring; 75. a fifth seal ring; 76. a sixth seal ring; 77. a seventh seal ring;
8. an upper interval of the oil well; 9. the lower layer section of the oil well.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present application, a specific embodiment of the present application will be described with reference to the accompanying drawings.
The specific embodiments of the application described herein are for purposes of illustration only and are not to be construed as limiting the application in any way. Given the teachings of the present application, one of ordinary skill in the related art will contemplate any possible modification based on the present application, and such should be considered to be within the scope of the present application. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, 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. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 3, the application provides a production layer blocking and production linkage controller 100 of an oil well, which comprises a hollow cylinder body 1, wherein an upper liquid inlet hole 11 and a lower liquid inlet hole 12 are arranged on the side wall of the cylinder body 1 at intervals, the lower liquid inlet hole 12 is used for enabling production liquid of a lower layer section of the oil well to flow into the cylinder body, the upper liquid inlet hole 11 is used for enabling production liquid of the upper layer section of the oil well to flow into the cylinder body, and the bottom of the cylinder body 1 is connected with a blocking structure 2; an inner sliding sleeve structure 3 is arranged in the cylinder body 1, and the inner sliding sleeve structure 3 can be communicated with the lower liquid inlet 12 and can slide downwards to block the lower liquid inlet 12 under the sleeve pressing action; an outer sliding sleeve structure 4 is sleeved on the outer wall of the cylinder body 1, the outer sliding sleeve structure 4 can block the upper liquid inlet 11 and can move upwards to expose the upper liquid inlet 11, and the inner sliding sleeve structure 3 and the outer sliding sleeve structure 4 form a layer-changing switch part.
In the oil well production layer blocking and mining linkage controller provided by the application, the inner sliding sleeve structure and the outer sliding sleeve structure jointly form the layer changing switch part, when the layer is mined and changed, the upper liquid inlet hole and the lower liquid inlet hole are reliably closed and opened, the closing and the opening are simultaneously completed, and the phenomenon of unclear opening and closing is avoided; when the layers are replaced, the switch opening information is clear; the oil well production layer blocking and mining linkage controller provided by the application is simple in field operation, and the layer replacement can be realized only by pressing once; the oil well production layer blocking and mining linkage controller provided by the application has low cost, and the cost is about 1/20 of that of an electronic switch, so that the oil well production layer blocking and mining linkage controller is beneficial to popularization and use.
Further, as shown in fig. 1, the inner sliding sleeve structure 3 includes a hollow inner sleeve 31, a first blocking ball 32 is disposed at the bottom of the inner sleeve 31, the first blocking ball 32 can allow the production fluid to flow into the inner sleeve 31 from bottom to top, a radially penetrating sliding chute 33 is disposed on a side wall of the inner sleeve 31, and the sliding chute 33 can be communicated with the upper fluid inlet 11; the inner sleeve 31 can be fixed in the cylinder body 1 through the shearing pin 5, and when the inner sleeve 31 is fixed by the shearing pin 5, the lower liquid inlet 12 can be communicated with the bottom of the inner sleeve 31; when the shear pin 5 is sheared, the inner sleeve 31 can slide down along the inner wall of the cylinder body 1 in a sealing manner to seal the lower liquid inlet 12, and a seventh sealing ring 77 is arranged between the outer wall of the inner sleeve 31 and the inner wall of the cylinder body 1 to ensure the sealing effect.
Further, as shown in fig. 1, the track nail 13 is disposed on the side wall of the cylinder body 1, the track nail 13 is disposed protruding from the inner wall of the cylinder body 1, and the chute 33 can slide along the track nail 13 axially.
Further, as shown in fig. 1, the outer sliding sleeve structure 4 comprises an outer sleeve 41 sleeved on the outer wall of the cylinder body 1, a locking piece 42 is arranged on the side wall of the cylinder body 1 in a sliding way along the radial direction, the locking piece 42 can be extruded by the side wall of the inner sleeve 31 to radially outwards move and protrude out of the outer wall of the cylinder body 1 so as to fix the outer sleeve 41, and the outer sleeve 41 can seal the upper liquid inlet 11 when being fixed; when the inner sleeve 31 moves downwards, the locking piece 42 radially retracts, and the outer sleeve 41 moves upwards to expose the upper liquid inlet 11. As shown in fig. 3, when the inner sleeve 31 moves down to block the lower inlet 12, the lock block 42 retracts radially, the outer sleeve 41 moves up to expose the upper inlet 11, the production fluid in the upper section of the well flows into the barrel body 1, and the production of the upper and lower sections of the well is switched.
Further, as shown in fig. 1, a first stepped portion 14 having a larger diameter is provided on the outer wall of the tube body 1 above the shear pin 5, and a first spring 61 is provided between the outer sleeve 41 and the first stepped portion 14 on the tube body 1. When the locking piece 42 is retracted radially, the outer sleeve 41 moves upwards under the action of the first spring 61, exposing the upper inlet 11.
Further, the outer wall of the inner sleeve 31 above the chute 33 is spaced from the inner wall of the barrel body 1.
Further, as shown in fig. 1, to secure the sealing effect, a first seal ring 71 is provided between the inner wall of the outer sleeve 41 and the outer wall of the cartridge body 1.
Further, as shown in fig. 1, the plugging structure 2 comprises a hollow inner connecting sleeve 21 sleeved in the cylinder body 1 and located below the lower liquid inlet 12, a bottom sealing connecting plug 22 of the inner connecting sleeve 21, a limiting sleeve 23 sleeved on the inner top of the inner connecting sleeve 21, a second plugging ball 24 arranged at the bottom of the limiting sleeve 23, a second spring 25 arranged at the bottom of the second plugging ball 24, and a bottom end of the second spring 25 abutted to the top end of the plug 22, wherein the second plugging ball 24 can plug the inner connecting sleeve 21 from bottom to top. In one embodiment of the present application, the inner connecting sleeve 21 is screwed into the cylinder body 1, the limit sleeve 23 is screwed into the inner connecting sleeve 21, and the plug 22 is screwed into the inner connecting sleeve 21; in order to ensure the sealing effect, a second sealing ring 72 is arranged between the limiting sleeve 23 and the inner connecting sleeve 21, and a third sealing ring 73 is arranged between the inner connecting sleeve 21 and the cylinder body 1.
Further, as shown in fig. 1, a second step portion 15 with an increased diameter is disposed above the lower liquid inlet hole 12 on the outer wall of the cylinder body 1, an outer connecting sleeve 16 is sleeved on the outer wall of the second step portion 15, the lower liquid inlet hole 12 and the plugging structure 2 are located in the outer connecting sleeve 16, the bottom of the outer connecting sleeve 16 is communicated with a lower joint 17, and the lower joint 17 is used for connecting a lower oil pipe (in the prior art, not shown in the drawing). The inner diameter of the outer connecting sleeve 16 is the same as the outer diameter of the second step part 15, an inner sleeve annulus is formed between the inner wall of the outer connecting sleeve 16 and the bottom outer wall of the cylinder body 1 and the outer wall of the plugging structure 2, and the inner sleeve annulus is communicated with the lower oil pipe through the inner cavity of the lower joint 17.
In an embodiment of the present application, as shown in fig. 1, an outer connecting sleeve 16 is screwed to the cartridge body 1, and a lower joint 17 is screwed to the outer connecting sleeve 16; in order to ensure the sealing effect, a fourth sealing ring 74 is arranged between the bottom of the cylinder body 1 and the top of the outer connecting sleeve 16, and a fifth sealing ring 75 is arranged between the bottom of the outer connecting sleeve 16 and the top of the lower joint 17.
Further, as shown in fig. 1, the top of the cartridge body 1 is connected to an upper joint 18, and the upper joint 18 is used to connect an upper packer (not shown in the drawing) which communicates with an upper oil pipe (not shown in the drawing in the prior art). In one embodiment of the application, the upper joint 18 is screwed with the cartridge body 1; to ensure a sealing effect, a sixth sealing ring 76 is provided between the upper fitting 18 and the cartridge body 1.
The application method of the oil well production layer blocking and production linkage controller 100 is as follows:
firstly, the installation of the oil well production layer blocking and production linkage controller 100 is completed:
the upper joint 18 of the oil well production layer blocking and production linkage controller 100 is connected with the lower end of an upper packer (not shown in the prior art), the lower joint 17 is connected with a lower oil pipe extending to the lower layer section 9 of the oil well, and the inner sleeve 31 is fixed in the cylinder body 1 through the shearing pin 5; the well is designed according to engineering scheme, and the position of the oil well production layer blocking and production linkage controller 100 is located in the upper layer section 8 of the oil well.
Before layer replacement, producing an oil well lower layer section 9: as shown in fig. 2, the produced liquid in the lower layer section 9 of the oil well enters the inner annular space of the sleeve (the space between the inner wall of the outer connecting sleeve 16 and the bottom outer wall of the cylinder body 1 and the outer wall of the plugging structure 2) through the lower oil pipe and the lower connector 17, then enters the cylinder body 1 through the lower liquid inlet hole 12, the first plugging ball 32 is jacked up under the pressure of the produced liquid, the lower layer produced liquid flows from bottom to top, and flows out of the oil well produced layer plugging and production linkage controller 100 of the application through the inner sleeve 31 and flows to the ground through the upper oil pipe;
the inner sleeve 31 and the cylinder body 1 bear the liquid pressure of the lower layer section 9 of the oil well, the cylinder body 1 bears the liquid pressure of the upper layer section 8 of the oil well, and the shearing pin 5 does not bear external shearing force, so that the shearing pin 5 is ensured not to be sheared due to large pressure difference between the upper layer section and the lower layer section, and the phenomenon of opening and closing by mistake is avoided.
The layer changing process comprises the following steps: after a period of production, if the production of the upper section 8 of the oil well needs to be changed, high-pressure liquid is pumped into the casing, the high-pressure liquid is transferred into the oil well production layer blocking and production linkage controller 100,
due to the uniflow action of the first blocking ball 32, when the high-pressure liquid pressure rises to the set pressure, the inner sleeve 31 moves downwards to shear the shear pin 5, the inner sleeve 31 continues to move downwards under the pressure to close the lower liquid inlet 12 below the cylinder body 1, after the inner sleeve 31 continues to move downwards, when the inner sleeve 31 moves to the set position, the inner sleeve 31 does not push against the locking piece 42 any more, the locking piece 42 loses support and radially retracts, the outer sleeve 41 is unlocked, moves upwards under the pressure of the first spring 61 to expose (open) the upper liquid inlet 11, the cylinder body 1 is communicated with the upper oil well section 8, the internal pressure drops, the pumping pressure appears to drop and is not stable, and the exploitation of the upper oil well section and the lower oil well section is switched (layer switching is completed) as shown in fig. 3; the information of the switching process is clear and clear, and the operation is convenient.
After layer exchange, the upper layer section 8 of the production oil well: when the pressure of the lower oil well interval 9 is high, the produced liquid of the lower oil well interval 9 cannot enter the inner sliding sleeve structure 3 due to the uniflow action of the second blocking ball 24, so that the produced liquid is ensured to be the produced liquid of the upper oil well interval 8; when the pressure of the upper oil well section 8 is high, the produced liquid of the upper oil well section 8 cannot flow out to the lower oil well section 9 through the inner connecting sleeve 21 due to the uniflow action of the first plugging ball 32, so that the high-pressure liquid of the upper oil well section 8 is prevented from flowing backward to the lower oil well section 9, and the influence of the lower oil well section 9 is avoided.
Therefore, the oil well production zone blocking and production linkage controller provided by the application has the following beneficial effects:
in the oil well production layer blocking and mining linkage controller provided by the application, the inner sliding sleeve structure and the outer sliding sleeve structure jointly form the layer changing switch part, when the layer is mined and changed, the upper liquid inlet hole and the lower liquid inlet hole are reliably closed and opened, the closing and the opening are simultaneously completed, and the phenomenon of unclear opening and closing is avoided; when the layers are replaced, the switch opening information is clear; the oil well production layer blocking and mining linkage controller provided by the application is simple in field operation, and the layer replacement can be realized only by pressing once; the oil well production layer blocking and mining linkage controller provided by the application has low cost, and the cost is about 1/20 of that of an electronic switch, so that the oil well production layer blocking and mining linkage controller is beneficial to popularization and use.
The foregoing is illustrative of the present application and is not to be construed as limiting the scope of the application. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this application, and are intended to be within the scope of this application.
Claims (7)
1. The oil well production layer blocking and production linkage controller is characterized by comprising a hollow cylinder body, wherein an upper liquid inlet hole and a lower liquid inlet hole are formed in the side wall of the cylinder body at intervals, the lower liquid inlet hole is used for enabling production liquid of a lower layer section of an oil well to flow into the cylinder body, the upper liquid inlet hole is used for enabling production liquid of an upper layer section of the oil well to flow into the cylinder body, and the bottom of the cylinder body is connected with a blocking structure; an inner sliding sleeve structure is arranged in the cylinder body, can be communicated with the lower liquid inlet hole and can slide downwards to block the lower liquid inlet hole under the sleeve pressing action; an outer sliding sleeve structure is sleeved on the outer wall of the cylinder body, the outer sliding sleeve structure can block the upper liquid inlet hole and can move upwards to expose the upper liquid inlet hole, and the inner sliding sleeve structure and the outer sliding sleeve structure form a layer-changing switch part;
the inner sliding sleeve structure comprises a hollow inner sleeve, a first plugging ball is arranged at the bottom of the inner sleeve, the first plugging ball can allow production fluid to flow into the inner sleeve from bottom to top, a radially-through sliding chute is arranged on the side wall of the inner sleeve, and the sliding chute can be communicated with the upper fluid inlet hole; the inner sleeve can be fixed in the cylinder body through a shearing pin, and when the inner sleeve is fixed by the shearing pin, the lower liquid inlet hole can be communicated with the bottom of the inner sleeve; when the shearing pin is sheared, the inner sleeve can slide down along the inner wall of the cylinder body in a sealing way to seal the lower liquid inlet;
the side wall of the cylinder body is provided with a track nail, the track nail is internally protruded from the inner wall of the cylinder body, and the chute can axially slide along the track nail;
the outer sliding sleeve structure comprises an outer sleeve sleeved on the outer wall of the cylinder body, a locking block is arranged on the side wall of the cylinder body in a sliding way along the radial direction, the locking block can radially outwards move and protrude out of the outer wall of the cylinder body under the extrusion of the side wall of the inner sleeve so as to fix the outer sleeve, and the upper liquid inlet hole can be blocked when the outer sleeve is fixed; when the inner sleeve moves downwards, the locking block radially retracts, and the outer sleeve moves upwards to expose the upper liquid inlet hole.
2. The oil well production zone blocking and production linkage controller according to claim 1, wherein a first step part with the diameter increased from top to bottom is arranged above the shearing pin on the outer wall of the cylinder body, and a first spring is sleeved between the outer sliding sleeve and the first step part on the cylinder body.
3. The oil well production zone plugging and production linkage controller of claim 1, wherein an outer wall of the inner sleeve above the chute and an inner wall of the barrel body are disposed in a spaced relationship.
4. The oil well production zone plugging and production linkage controller of claim 1, wherein a first seal ring is disposed between an inner wall of the outer sleeve and an outer wall of the barrel body.
5. The oil well production zone blocking and mining linkage controller according to claim 1, wherein the blocking structure comprises a hollow inner connecting sleeve sleeved in the cylinder body and positioned below the lower liquid inlet, the bottom of the inner connecting sleeve is connected with a blocking head in a sealing mode, the top of the inner side of the inner connecting sleeve is sleeved with a limiting sleeve, the bottom of the limiting sleeve is provided with a second blocking ball, the bottom of the second blocking ball is provided with a second spring, the bottom end of the second spring abuts against the top end of the blocking head, and the second blocking ball can block the inner connecting sleeve from bottom to top.
6. The oil well production zone plugging and production linkage controller according to claim 5, wherein a second step part with the diameter increased from bottom to top is arranged on the outer wall of the cylinder body above the lower liquid inlet hole, an outer connecting sleeve is sleeved on the outer wall of the second step part, the lower liquid inlet hole and the plugging structure are positioned in the outer connecting sleeve, the bottom of the outer connecting sleeve is communicated with a lower joint, and the lower joint is used for connecting a lower oil pipe.
7. The oil well production string controller of claim 1, wherein the top of the cartridge body is connected to an upper connector for connecting to an upper packer.
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| CN202110233021.8A CN115030696B (en) | 2021-03-03 | 2021-03-03 | Oil well production layer blocking and production linkage controller |
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| CN203655263U (en) * | 2014-01-11 | 2014-06-18 | 中国石油化工股份有限公司 | Underground double-sliding-sleeve layering sand blasting device |
| CN207177870U (en) * | 2017-08-16 | 2018-04-03 | 中国石油天然气股份有限公司 | Linkage pressure relief device |
| RU191708U1 (en) * | 2019-03-01 | 2019-08-19 | Андрей Николаевич Каракуша | DEVICE FOR SIMULTANEOUS SEPARATE OPERATION OF TWO STRAYS |
| CN212272147U (en) * | 2020-02-19 | 2021-01-01 | 中国石油天然气股份有限公司 | Carbon dioxide composite layered injection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6817409B2 (en) * | 2001-06-13 | 2004-11-16 | Weatherford/Lamb, Inc. | Double-acting reciprocating downhole pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1936269A (en) * | 2006-10-17 | 2007-03-28 | 新疆石油管理局采油工艺研究院 | Three-layer water-searching pipe column for oil-pumping well in oil field and water-searching method |
| CN203655263U (en) * | 2014-01-11 | 2014-06-18 | 中国石油化工股份有限公司 | Underground double-sliding-sleeve layering sand blasting device |
| CN207177870U (en) * | 2017-08-16 | 2018-04-03 | 中国石油天然气股份有限公司 | Linkage pressure relief device |
| RU191708U1 (en) * | 2019-03-01 | 2019-08-19 | Андрей Николаевич Каракуша | DEVICE FOR SIMULTANEOUS SEPARATE OPERATION OF TWO STRAYS |
| CN212272147U (en) * | 2020-02-19 | 2021-01-01 | 中国石油天然气股份有限公司 | Carbon dioxide composite layered injection device |
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| CN115030696A (en) | 2022-09-09 |
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