CN108386169B - Fine adjustment process pipe column for contradiction in injection well section - Google Patents
Fine adjustment process pipe column for contradiction in injection well section Download PDFInfo
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- CN108386169B CN108386169B CN201810094906.2A CN201810094906A CN108386169B CN 108386169 B CN108386169 B CN 108386169B CN 201810094906 A CN201810094906 A CN 201810094906A CN 108386169 B CN108386169 B CN 108386169B
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- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000012856 packing Methods 0.000 claims abstract description 14
- 239000010985 leather Substances 0.000 claims abstract description 9
- 230000035699 permeability Effects 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000005755 formation reaction Methods 0.000 claims description 10
- 230000000803 paradoxical effect Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 2
- 230000008094 contradictory effect Effects 0.000 claims 3
- 238000004891 communication Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 12
- 230000000903 blocking effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The application provides a technique tubular column is finely adjusted to contradiction in injecting well section, includes: the device comprises a sleeve, an oil pipe, a water distribution ball injector, a first packer, a second packer, a first packing cup, a ball collecting sliding sleeve and a plug. The tubing and the casing form a first annular space. The water distribution ball injector is internally provided with a plugging ball, and the water distribution ball injector can distribute the plugging ball to the first annular space and then perform water injection profile control. The first packer is arranged above the water distribution ball injector close to the well mouth and is provided with a flow guide channel, and the flow guide channel can be communicated with the first annular space. And the second packer is arranged between two adjacent water distribution ball injectors and is used for separating the stratums with different permeabilities. The first packing cup is arranged below the water distribution ball injector far away from the wellhead and used for limiting the plugging ball in a first annular space formed by the first packer and the first packing cup. The ball collecting sliding sleeve is arranged above the first leather cup and can recover the plugging balls in the first annular space into the oil pipe. The plug is arranged at the tail end of the oil pipe.
Description
Technical Field
The application belongs to the technical field of oil exploitation, and particularly relates to a process pipe column for fine adjustment of contradictions in an injection well section.
Background
At present, a plurality of water injection blocks of Liaohe oil fields adopt a large-section co-injection and co-production development mode. Because the number of layers of the oil reservoir is large, the interlayer is small, and the oil reservoir is limited by an operation tool, the current mechanical separate injection technology can only realize five-level to six-level layered water injection at most, cannot realize extremely layered formation in the face of dozens of small-layer oil reservoirs, and can only divide a plurality of small layers with relatively close permeability into one section for sectional water injection.
However, as the period of the sectional water injection is prolonged, the difference in the sections is formed, which sometimes causes the water injection to rush into the sections, and the water flooding effect is poor. The middle and low-permeability small layers in the water injection well section cannot be effectively started, so that the fine adjustment measures of the oil well cannot play a role.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a process pipe column for finely adjusting contradictions in an injection well section, which can combine a ball throwing profile control technology with a mechanical separate layer water injection technology and solve the problems of outstanding contradictions in the section and non-ideal water drive effect.
The specific technical scheme of the invention is as follows:
the invention provides a process pipe column for finely adjusting contradictions in an injection well section, which comprises the following steps:
a sleeve;
the oil pipe is sleeved inside the sleeve and forms a first annular space with the sleeve;
the water distribution ball throwers are connected to the oil pipe, and are internally provided with the plugging adjusting balls, and the water distribution ball throwers can distribute the plugging adjusting balls to the first annular space and then perform water injection profile control;
the first packer is arranged above a water distribution ball injector close to a wellhead and is provided with a flow guide channel, and the flow guide channel can be communicated with the first annular space;
the second packer is arranged between two adjacent water distribution ball throwers and is used for separating stratums with different permeabilities;
the first packing cup is arranged below a water distribution ball injector far away from a wellhead and used for limiting the plugging ball in a first annular space formed by the first packer and the first packing cup;
the ball collecting sliding sleeve is arranged above the first leather cup and can recover the plugging ball in the first annular space into the oil pipe;
and the plug is arranged at the tail end of the oil pipe.
In one embodiment, the dispenser comprises:
the central pipe is connected to the oil pipe through an upper joint and a lower joint respectively, and a through hole is formed in the central pipe;
the outer sleeve is sleeved outside the central tube and forms a second annular space with the central tube, the upper end of the outer sleeve is connected with the upper joint through shear pins, the lower end of the outer sleeve is provided with a butting part, a fixing part is arranged in the second annular space and is fixedly connected with the outer sleeve and the central tube, the second annular space is divided into a third annular space and a fourth annular space, the third annular space is used for containing a plugging adjusting ball, and the fourth annular space is communicated with the through hole;
and the water distribution nozzle is arranged on the central pipe and used for injecting water into the first annular space.
In one embodiment, the second packer is set when the tubing is pressurized and unset when pressurized in the first annulus.
In one embodiment, the second packer is set when the tubing is pressurized and unset when the tubing is not pressurized.
In one embodiment, the diameter of the rubber sleeve of the second packer is less than or equal to 90 mm, and the length of the rubber sleeve is more than 1.5 m.
In one embodiment, the ball collecting sliding sleeve is a one-way conduction device which is closed when the oil pipe is pressurized and is opened when the oil pipe is pressurized.
In one embodiment, the paradoxical fine adjustment process string in the injection well section further comprises a second cup disposed between the first packer and the water distributor ball injector near the wellhead.
In one embodiment, the paradoxical fine adjustment process string in the injection interval further comprises a first centralizer and a second centralizer, the first centralizer being disposed above the first packer, the second centralizer being disposed between the first cup and the plug.
In one embodiment, the water dispenser is positioned opposite the formation where water injection is desired.
In one embodiment, the second packer is set at a packer between adjacent formations requiring water injection.
Borrow by above technical scheme, the beneficial effect of this application lies in:
specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:
FIG. 1 is a schematic diagram of a paradoxical fine adjustment process string within an injection interval according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a water distribution ball injector of a paradoxical fine adjustment process string in an injection well section according to an embodiment of the present application.
Reference numerals of the above figures: 1. a sleeve; 2. an oil pipe; 3. a first annular space; 4. a water distribution ball injector; 41. adjusting a blocking ball; 42. a central tube; 43. an upper joint; 44. a lower joint; 45. a through hole; 46. a jacket; 47. shearing the nails; 48. an abutting portion; 49. a fixing member; 410. a second annular space; 411. a third annular space; 412. a fourth annular space; 5. a first packer; 6. a second packer; 7. a first leather cup; 8. a ball collecting sliding sleeve; 9. plugging with a thread; 10. a second leather cup; 11. a first centralizer; 12. a second centralizer; 100. a water-flooded formation; 200. sandwich layer
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection 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 "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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 present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the present application provides a paradoxically fine tuned process string for injection into a well section, the process string comprising: the device comprises a casing 1, an oil pipe 2, a plurality of water distribution ball injectors 4 connected to the oil pipe 2, a first packer 5, a second packer 6, a first cup 7, a ball collecting sliding sleeve 8 and a plug 9. The oil pipe 2 is sleeved in the casing 1 and forms a first annular space 3 with the casing 1. A plurality of water distribution bowling wares 4 are inside to have and transfer stifled ball 41, water distribution bowling wares 4 can with transfer stifled ball 41 and distribute to carry out the water injection profile control behind the first annular space 3. A first packer 5 is arranged above the water distributing thrower 4 close to the wellhead, said first packer 5 having a flow guide channel (not shown in the figures) which can communicate with said first annular space 3. And a second packer 6 is arranged between two adjacent water distribution ball injectors 4 and is used for separating the stratums with different permeabilities. The first packing cup 7 is arranged below the water distribution ball injector 4 far away from the wellhead and used for limiting the plugging ball 41 in a first annular space 3 formed by the first packer 5 and the first packing cup 7. The ball collecting sliding sleeve 8 is arranged above the first leather cup 7, and can recover the plugging ball 41 in the first annular space 3 into the oil pipe 2. A plug 9 is provided at the end of the tubing 2.
When the injection well section internal contradiction fine adjustment process pipe column is used for water injection profile control, firstly, the process pipe column is lowered to a target layer position, then liquid is injected into an oil pipe 2 to be pressurized, a first packer 5 and a second packer 6 are set, then the liquid is continuously injected into the oil pipe 2 to be pressurized, water is injected after a water distribution ball injector 4 releases a plugging adjusting ball 41, and the plugging adjusting ball 41 can automatically plug a perforation porthole (not shown in the figure) of a strong water absorption stratum in a first annular space 3. When the water injection finishes and needs to be carried out measure adjustment or play the tubular column down, can utilize the cement car to inject liquid backwash into first annular space 3, liquid can get into first annular space 3 through the water conservancy diversion passageway of first packer 5, second packer 6 is because the effect packing element of the interior liquid pressure of sleeve pipe 1 is retracted this moment, 6 deblocking of second packer, receive ball sliding sleeve 8 and also open under hydraulic effect, transfer stifled ball 41 can retrieve through receiving ball sliding sleeve 8 and advance in the oil pipe 2, retrieve in the ball ware that returns the well head along with well-flushing liquid. And when the plugging adjusting ball 41 is completely recovered, the next column operation can be carried out. So can realize transferring the well-flushing of stifled ball 41 and retrieve, avoid transferring stifled ball 41 and detain and cause the influence in the pit.
The injection well section internal contradiction fine adjustment process pipe column can divide layers with similar permeability into different layer systems by using the second packer 6, then water distribution and ball injection devices 4 are used for quantitatively distributing water to the layer systems, and the blocking adjusting balls 41 can automatically block high permeability layer blastholes in the section and perform secondary fine adjustment on water absorption profiles.
In the present embodiment, the casing 1 extends in the longitudinal direction, and the casing 1 is provided with a perforation hole. The oil pipe 2 is sleeved in the casing 1 and forms a first annular space 3 with the casing 1, and the tail end of the oil pipe 2 can be provided with a plug 9. A water dispenser ball injector 4 may be attached to the tubing 2 opposite the formation 100 to be injected. A certain number of adjusting and blocking balls 41 can be accommodated inside the water distribution and ball injection device 4, so that the adjusting and blocking balls 41 can be distributed to the first annular space 3 for water injection and profile control. It should be noted that, the selection of the plugging control ball 41 needs to sample and test the water injected into the oil well, detect the density value of the injected water at the position of the underground target layer, and select the plugging control ball 41 completely matching with the density. Meanwhile, the adjusting and blocking ball 41 with the diameter 2-4mm larger than the diameter of the perforation blasthole of the casing 1 needs to be selected to ensure that the adjusting and blocking ball 41 can block the blasthole and does not enter the stratum. In addition, the number of the shot balls in each layer is determined according to the information of the water absorption section, and the number of the shot balls 41 which are put in is about 0.8-1 times of the number of the perforation holes on the casing 1 under the normal condition.
A first packer 5 may be set above the distributed ball thrower 4 near the wellhead. The first packer 5 must have a certain pressure-bearing capacity because its working environment needs to withstand a one-way differential pressure. The first packer 5 may be a Y-packer, the first packer 5 having a flow guiding channel, the flow guiding channel being communicable with the first annular space 3, such that when injecting liquid into the first annular space 3 and pressurizing, the liquid may enter the first annular space 3 through the flow guiding channel of the first packer 5.
A second packer 6 may be placed between two adjacent water distributing throwers 4 and may be set at the interval 200 between adjacent formations 100 to be injected with water for separating the formations of different permeabilities in the interval. Preferably, the second packer 6 may be a K-type (expandable) packer. By adopting the packer, the second packer 6 can be set when the oil pipe 2 is pressed, and the second packer 6 is unset when the first annular space 3 is pressed, so that the plugging adjusting ball 41 can move freely in the first annular space 3 and can be distributed according to the difference of the formation permeability, and then the perforation blastholes on the casing 1 are plugged. Or the second packer 6 can also be unset when the oil pipe 2 is not pressurized, and the same technical effect can be achieved, and a person skilled in the art can select the second packer 6 with different unset modes according to actual needs on site, which is not limited in this application.
Preferably, the diameter of the rubber sleeve of the second packer 6 is less than or equal to 90 mm, and the small diameter of the rubber sleeve is designed to be less than or equal to 90 mm, so that the second packer 6 has better passing capacity, and the pipe column is also suitable for some casing change wells. The length of the rubber cylinder of the second packer 6 is larger than 1.5 meters, on one hand, the thin interbedded reservoir interlayer is poor in development, the conventional packer is limited by operation, the clamping sealing distance is more than 2 meters, and the long rubber cylinder packer with the length larger than 1.5 meters can be used for plugging the small interlayer 200, so that the plugging success rate is improved.
The first packing cup 7 is arranged below the water distribution ball injector 4 far away from the wellhead and used for limiting the plugging ball 41 in a first annular space 3 formed by the first packer 5 and the first packing cup 7. The ball collecting sliding sleeve 8 is arranged above the first leather cup 7 and used for recovering the plugging ball 41 in the first annular space 3 into the oil pipe 2. It should be noted that the ball-collecting sliding sleeve 8 is a generally one-way valve device, which can be closed when the oil pipe 2 is pressurized and can be opened when the first annular space 3 is pressurized. When annotating liquid and suppressing in to first annular space 3, receive ball sliding sleeve 8 and can open, transfer stifled ball 41 this moment and can get into together along with liquid and receive ball sliding sleeve 8, and rethread oil pipe 2 is retrieved and is transferred stifled ball 41 to the well head.
Further, referring to fig. 2, the water dispenser ball injector 4 includes: a central tube 42, a jacket 46, and a dispensing nozzle (not shown). The central tube 42 is connected to the oil tube 2 through an upper joint 43 and a lower joint 44 respectively, and the central tube 42 is provided with a through hole 45.
The jacket 46 is sleeved outside the central tube 42, and forms a second annular space 410 with the central tube 42, the upper end of the jacket 46 is connected with the upper joint 43 through shear pins 47, the lower end of the jacket 46 is provided with a butting part 48, a fixing part 49 is arranged in the second annular space 410, the fixing part 49 is fixedly connected with the jacket 46 and the central tube 42, and the second annular space 410 is divided into a third annular space 411 and a fourth annular space 412, the third annular space 411 is used for accommodating the plugging adjusting ball 41, and the fourth annular space 412 is communicated with the through hole 45. A water distribution nozzle is arranged on the central tube 42 for injecting water into the first annular space 3.
The liquid injected from the oil pipe 2 can flow into the central pipe 42, and then flow into the fourth annular space 412 from the through hole 45 of the central pipe 42, because the fixing member 49 is fixedly connected with the central pipe 42 and the outer sleeve 46, the liquid in the fourth annular space 412 can only press the abutting part 48 of the outer sleeve 46 to drive the outer sleeve 46 to move downwards, the outer sleeve 46 shears the shear pin 47 in the downward movement process, the outer sleeve 46 is separated from the upper joint 43, the plugging ball 41 of the third annular space 411 is exposed, at this time, the plugging ball 41 is released into the first annular space 3 formed by the casing 1 and the oil pipe 2, then a measuring and adjusting instrument (not shown in the figure) can be inserted into the well, and the water distribution ball injector 4 can inject water into the first annular space 3 through the water distribution nozzle.
In addition, the contradiction fine adjustment process pipe column in the injection well section can further comprise a second packing cup 10, and the second packing cup 10 is arranged between the first packer 5 and the water distribution ball injector 4 close to the well head. The second leather cup 10 and the first leather cup 7 are matched with each other to limit the movement interval of the plugging ball 41, the upper plugging ball 41 is adjusted to be not floated, the setting of the first packer 5 cannot be influenced, the lower part is matched with the ball receiving sliding sleeve 8, the recovery of the plugging ball 41 can be realized, the deblocking of a pipe column cannot be influenced, and the deblocking load is increased.
In addition to this, the paradoxical fine adjustment process string in the injection well section may further comprise a first centralizer 11 and a second centralizer 12, the first centralizer 11 being arranged above the first packer 5, the second centralizer 12 being arranged between the first cup 7 and the plug 9. The first centralizer 11 and the second centralizer 12 can ensure that the tubular column is centered, and avoid that when the well is inclined to a great extent, the oil pipe 2 is attached to the casing 1, so that the first annular space 3 is different, and the plugging adjusting ball 41 can only plug one side of the perforation blasthole of the casing 1. Meanwhile, when the blocking adjusting ball 41 is recovered, the blocking adjusting ball 41 is clamped in the first annular space 3 and cannot be recovered into the ball sliding sleeve 8.
It should be noted that the casing 1, the oil pipe 2, and the like provided in the present embodiment may be any suitable existing structure. For clearly and briefly explaining the technical solution provided by the present embodiment, the above parts will not be described again, and the drawings in the specification are also simplified accordingly. It should be understood, however, that the present embodiments are not limited in scope thereby.
Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.
Claims (8)
1. A contradiction fine adjustment process pipe column in an injection well section is characterized by comprising:
a sleeve;
the oil pipe is sleeved inside the sleeve and forms a first annular space with the sleeve;
the water distribution ball throwers are connected to the oil pipe, and are internally provided with the plugging adjusting balls, and the water distribution ball throwers can distribute the plugging adjusting balls to the first annular space and then perform water injection profile control;
the first packer is arranged above a water distribution ball injector close to a wellhead and is provided with a flow guide channel, and the flow guide channel can be communicated with the first annular space;
the second packer is arranged between two adjacent water distribution ball throwers and is used for separating stratums with different permeabilities; the second packer is set when the oil pipe is pressurized and is unset when the first annular space is pressurized, or the second packer is set when the oil pipe is pressurized and is unset when the oil pipe is not pressurized;
the first packing cup is arranged below a water distribution ball injector far away from a wellhead and used for limiting the plugging ball in a first annular space formed by the first packer and the first packing cup;
the ball collecting sliding sleeve is arranged above the first leather cup and can recover the plugging ball in the first annular space into the oil pipe;
and the plug is arranged at the tail end of the oil pipe.
2. The contradictory fine adjustment process string in an injection interval of claim 1, wherein the water dispenser pitch comprises:
the central pipe is connected to the oil pipe through an upper joint and a lower joint respectively, and a through hole is formed in the central pipe;
the outer sleeve is sleeved outside the central tube and forms a second annular space with the central tube, the upper end of the outer sleeve is connected with the upper joint through shear pins, the lower end of the outer sleeve is provided with a butting part, a fixing part is arranged in the second annular space and is fixedly connected with the outer sleeve and the central tube, the second annular space is divided into a third annular space and a fourth annular space, the third annular space is used for containing a plugging adjusting ball, and the fourth annular space is communicated with the through hole;
and the water distribution nozzle is arranged on the central pipe and used for injecting water into the first annular space.
3. The paradoxically fine tuned process string in an injection interval of a well according to claim 1, wherein said second packer has a packer diameter of 90 mm or less and a length of greater than 1.5 m.
4. The paradox fine adjustment process string in an injection wellbore section of claim 1, wherein the ball recovery sliding sleeve is a one-way communication device that closes when pressurized in the tubing and opens when pressurized in the first annular space.
5. The string of claim 1, further comprising a second cup disposed between the first packer and the water dispenser ball injector proximate the wellhead.
6. The injection interval contradictory fine adjustment process string of claim 1, further comprising a first centralizer and a second centralizer, the first centralizer disposed above the first packer, the second centralizer disposed between the first cup and the plug.
7. The paradoxical fine adjustment process string in an injection interval of claim 1, wherein the water dispenser ball injector is positioned opposite the formation to be injected with water.
8. The contradictory fine adjustment process string in an injection interval of claim 1, wherein the second packer is set at a zone between adjacent formations requiring water injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810094906.2A CN108386169B (en) | 2018-01-31 | 2018-01-31 | Fine adjustment process pipe column for contradiction in injection well section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810094906.2A CN108386169B (en) | 2018-01-31 | 2018-01-31 | Fine adjustment process pipe column for contradiction in injection well section |
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| CN108386169A CN108386169A (en) | 2018-08-10 |
| CN108386169B true CN108386169B (en) | 2020-09-08 |
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| CN113338845A (en) * | 2020-02-18 | 2021-09-03 | 中国石油天然气股份有限公司 | Layered profile control tool and layered ball-throwing profile control tubular column |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895678A (en) * | 1974-07-08 | 1975-07-22 | Dresser Ind | Sealer ball catcher and method of use thereof |
| CN202391378U (en) * | 2012-01-13 | 2012-08-22 | 中国石油天然气股份有限公司 | Automatic ball injecting and receiving device for selective injection of casing deformation wells |
| CN202467796U (en) * | 2012-03-28 | 2012-10-03 | 中国石油天然气股份有限公司 | Sub-divisional water injection ball-launching profile control integrated pipe post for oil field water injection well |
| CN204457707U (en) * | 2014-12-29 | 2015-07-08 | 中国石油天然气股份有限公司 | Receipts system thrown by ball collecting device and ball injector and steel ball thereof |
| CN204457695U (en) * | 2014-12-31 | 2015-07-08 | 中国石油天然气股份有限公司 | A kind of high angle hole ball injection profile control and water injection integral pipe column |
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2018
- 2018-01-31 CN CN201810094906.2A patent/CN108386169B/en active Active
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