CN109025927B - Underground injection device capable of changing polymer viscosity - Google Patents
Underground injection device capable of changing polymer viscosity Download PDFInfo
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- CN109025927B CN109025927B CN201810813624.3A CN201810813624A CN109025927B CN 109025927 B CN109025927 B CN 109025927B CN 201810813624 A CN201810813624 A CN 201810813624A CN 109025927 B CN109025927 B CN 109025927B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The invention discloses a downhole injection device capable of changing polymer viscosity, which comprises an upper joint, an outer sleeve and a lower joint which are sequentially connected from top to bottom, wherein a viscosity-maintaining liquid outlet and a viscosity-reducing liquid outlet are arranged on the side wall of the outer sleeve; a guide positioning component is fixedly connected inside the upper joint; an injection allocation adjusting mechanism integrating the functions of viscosity protection and viscosity reduction is arranged in the outer sleeve, and the injection allocation adjusting mechanism is provided with a viscosity protection annular channel with an arc-shaped cross section and a viscosity reduction annular channel with a sharp-tooth-shaped cross section; and a polymer liquid inlet communicated with the viscosity-protecting channel and the viscosity-reducing channel is arranged on the central pipe. The invention can inject polymers with different injection quantities and different viscosities into different layers according to the geological requirements of an oil reservoir in the process of layered injection and allocation of the polymer injection wells of the offshore oil field, solves the problem of different polymer viscosity requirements of polymer injection intervals of the same well, improves the injection efficiency and the utilization efficiency of the polymers, reduces the operation cost and realizes the yield and injection increase of the offshore oil field.
Description
Technical Field
The invention relates to a layered polymer injection tool for an offshore oil field oil extraction process, in particular to a layered polymer injection measuring and adjusting working barrel with a viscosity changing function.
Background
Polymer flooding is an important technical means for realizing yield increase and high yield of offshore oil fields. At present, the polymer injection process adopted by offshore oil fields is gradually changed from a general injection process, a multi-pipe injection process and other processes to a single-pipe layered polymer injection and measurement and adjustment process, measurement and adjustment and monitoring means are gradually changed from mechanization to semi-automation and automation, interlayer fine injection is realized, interlayer heterogeneity influence is reduced, and injection allocation efficiency is improved.
Patent document CN2923998Y, 2007, 18 th 7 th month, discloses a layered polymer injection allocation device applicable to the field of petroleum development downhole equipment design, the utility model discloses a be provided with inside activity and allocate notes core and external fixation part two parts, allocate notes core and comprise taper pipe and slender pipe, the slender pipe is provided with a plurality of annular grooving outward, form annular continuous expansion and contraction pipe structure with external fixation part, realize step-down and protect and glue, through adjusting the length change injection allocation amount of allocating the core, can realize the layered polymer injection of two or more layers of layered polymer injection allocation work, it is greater than or equal to 95% to protect the rate of adhesion, allocate the injection regulating variable 20 ~ 200m3/d。
Patent document CN101705812B, 23.1.2013, discloses a large-discharge single-tube stratified injection-polymerization injection allocation method and an injection device thereof, the invention discloses a large-discharge single-tube stratified injection-polymerization device, and also discloses a large-discharge single-tube stratified injection-polymerization injection allocation method, the device is provided with an annular spiral depressurization pipeline consisting of a stratified injection allocation core and an annular spiral depressurization groove in a working barrel, pressure reduction and viscosity preservation can be realized, injection allocation cores with different inner diameters can be fished by steel wires according to different demands of stratum injection allocation, the adjustment of injection allocation is realized, the viscosity preservation rate is more than or equal to 85%, and the maximum injection allocation amount is less than or equal to 400m 3/d.
Patent document CN106837275A, 2017, 6.13.2017, discloses a large-discharge-capacity single-tube layered polymer injection adjustable device, which comprises a measuring and adjusting tool introduction mechanism, an injection quantity adjusting mechanism and a polymer pressure reduction and viscosity retention mechanism; the measuring and adjusting tool guiding mechanism has guiding function and positioning function; the injection quantity adjusting mechanism is provided with a spirally liftable injection allocation core body, and the injection allocation core body has the function of adjusting the injection quantity of the polymer; the polymer pressure reduction and viscosity protection mechanism is provided with a fusiform wave injection flow channel with pressure reduction and viscosity protection characteristics; the injection allocation core body has enough inner diameter to ensure the development of operations such as section testing and the like, and meanwhile, the bridge-type channel is arranged in the layered injection polymerization testing and adjusting working barrel, so that the injection of polymers in other layers is not influenced when the current layer is tested, and the injection allocation core body has the characteristics of large injection amount, good viscosity preservation and adjustable injection amount.
In summary, the existing offshore polymer injection measurement and adjustment process and tool can meet the requirements of layered polymer injection and adjustment, but cannot meet the requirement of changing polymer viscosity according to geological requirements, and the problems that the offshore oil field has complex geological characteristics and the requirements of different polymer viscosities in a polymer injection well are different exist all the time, and the utilization efficiency of the polymer under the injection well is influenced, so that in order to solve the problems, a variable viscosity polymer injection measurement and adjustment device is required to be provided.
Disclosure of Invention
The invention provides a downhole injection device which integrates viscosity retention and viscosity reduction functions and can change the viscosity of a polymer, aiming at solving the technical problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a downhole injection device capable of changing polymer viscosity comprises an upper joint, an outer sleeve and a lower joint which are sequentially connected from top to bottom, wherein a viscosity-maintaining liquid outlet and a viscosity-reducing liquid outlet are formed in the side wall of the outer sleeve; a guide positioning part is fixedly connected inside the upper joint; the inner side of the outer sleeve is provided with a matching and injection adjusting mechanism which integrates the functions of viscosity protection and viscosity reduction, the matching and injection adjusting mechanism comprises an adjusting ring, a driving ring and a central pipe which are sequentially connected from top to bottom, the adjusting ring is in threaded connection with the guiding and positioning part, and the inner side of the adjusting ring is provided with a longitudinal groove which is circumferentially connected with an adjusting arm of the injection concentration measuring and adjusting instrument; the outer diameter of the upper end part of the central tube is larger, the upper end of the central tube is connected with the adjusting ring through the driving ring and moves up and down through the rotation of the adjusting ring; an upper fixed disc fixedly connected with the outer sleeve is arranged at the upper end part of the central tube, the upper fixed disc is arranged below the driving ring, a lateral viscosity-maintaining liquid outlet hole opposite to the viscosity-maintaining liquid outlet on the outer sleeve is arranged on the upper fixed disc, a lower fixed disc fixedly connected with the outer sleeve is arranged at the lower end part of the central tube, and a lateral viscosity-reducing liquid outlet hole opposite to the viscosity-reducing liquid outlet on the outer sleeve is arranged on the lower fixed disc; go up the fixed disk with be equipped with the ring cover between the fixed disk down the middle sleeve pipe in the center tube outside middle sheathed tube inboard upper portion is equipped with a plurality of guarantor and glues outer adjusting collar, and the lower part is equipped with a plurality of viscosity reduction outer adjusting collar the outside cover of center tube is equipped with a plurality of guarantor that glues outer adjusting collar one-to-one glues interior adjusting collar and with a plurality of the outer adjusting collar one-to-one's of viscosity reduction a plurality of viscosity reduction interior adjusting collar the outside of guarantor gluing interior adjusting collar and the inboard of guarantor gluing outer adjusting collar all is equipped with the annular bead that axial section is convex the outside of the inner adjusting collar of viscosity reduction and the inboard of the outer adjusting collar all is equipped with the annular bead that axial section is triangle-shaped the viscosity reduction interior adjusting collar with guarantor glues annular channel that axial section is the bow wave between the outer adjusting collar of guarantor gluing, be formed with between the viscosity reduction outer adjusting collar with guarantor gluing annular channel and link to each other The axial section of the through hole is a sharp-tooth-wave viscosity reduction annular channel; a polymer liquid inlet communicated with the viscosity-maintaining channel and the viscosity-reducing channel is formed in the central tube and is positioned between the viscosity-reducing inner adjusting sleeve and the viscosity-maintaining inner adjusting sleeve; when the central tube moves upwards to a set position, the inlet of the lateral viscosity-reducing liquid outlet is opened, the lateral viscosity-reducing liquid outlet is communicated with the viscosity-reducing channel, the inner side of the lower fixed disc is hermetically connected with the outer side of the viscosity-reducing outer adjusting sleeve, and the inlet of the lateral viscosity-reducing liquid outlet is closed; when the central tube moves downwards to a set position, the inlet of the lateral viscosity-reducing liquid outlet is opened, the lateral viscosity-reducing liquid outlet is communicated with the viscosity-reducing channel, the inner side of the upper fixed disc is hermetically connected with the upper end part of the central tube, and the inlet of the lateral viscosity-reducing liquid outlet is closed; a bridge channel I is formed between the upper joint and the guide positioning part and the adjusting ring; a bridge type channel II staggered with the lateral viscosity-protecting liquid outlet hole is arranged on the upper fixed disc; a bridge channel III is formed between the middle sleeve and the outer sleeve; a bridge type channel IV staggered with the lateral viscosity reduction liquid outlet hole is arranged on the lower fixed disc; the bridge channel I, the bridge channel II, the bridge channel III and the bridge channel IV form an injection bridge channel communicated with the lower joint.
The adjusting ring is fixedly connected with the driving ring, and the driving ring is rotatably connected with the central pipe.
The polymer liquid inlet is arranged in the middle of the central tube.
The invention has the advantages and positive effects that: by adopting the injection allocation adjusting mechanism integrating the functions of viscosity protection and viscosity reduction, polymers with different injection allocation amounts and different viscosities can be injected into different layers according to the geological requirements of an oil reservoir in the process of layered injection and polymer allocation of the polymer injection wells of the offshore oil field, so that the problem of different polymer viscosity requirements of the polymer injection layer sections of the same well is solved, the injection efficiency and the utilization efficiency of the polymers are improved, the operation cost is reduced, and the yield and the injection increase of the offshore oil field are realized; the method can make up the defect of the function of adjusting and modulating the viscosity injection by layered measurement in the existing offshore polymer injection process, improve the application range of the offshore oil field polymer injection process, and provide favorable technical support for the popularization of the offshore polymer injection process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a liquid flow diagram of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
FIG. 5 is a cross-sectional view C-C of FIG. 1;
FIG. 6 is an axial partial cross-sectional view of a viscosity-maintaining annular passage of the present invention;
FIG. 7 is an axial partial cross-sectional view of the viscosity reducing annular passage of the present invention.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 7, a downhole injection device capable of changing polymer viscosity includes an upper joint 1, an outer sleeve 7 and a lower joint 13 connected in sequence from top to bottom, wherein a viscosity-maintaining liquid outlet 7-1 and a viscosity-reducing liquid outlet 7-2 are disposed on a side wall of the outer sleeve 7.
A guiding and positioning part 2 is fixedly connected inside the upper joint 1, and the guiding and positioning part 2 is provided with a guiding pen point structure and a positioning structure.
The inside injection adjustment mechanism that joins in marriage that is equipped with collection and protects to glue and viscosity reduction function in an organic whole of outer tube 7, it includes from last to the adjustable ring 3 that connects gradually down, drives ring 4 and center tube 6 to join in marriage injection adjustment mechanism, adjustable ring 3 with 2 threaded connection of guiding orientation part the adjustable ring 3 inboard is equipped with and annotates and gathers the vertical recess of survey accent appearance regulating arm circumference connection.
The outer diameter of the upper end part of the central tube 6 is larger, the upper end of the central tube 6 is connected with the adjusting ring 3 through the driving ring 4, and the upper end of the central tube moves up and down through the rotation of the adjusting ring 3; an upper fixed disk 5 fixedly connected with the outer sleeve 7 is arranged at the upper end part of the central tube 6, the upper fixed disk 5 is arranged below the driving ring 4, a lateral viscosity-maintaining liquid outlet hole 5-2 opposite to the viscosity-maintaining liquid outlet 7-1 is arranged on the upper fixed disk 5, a lower fixed disk 11 fixedly connected with the outer sleeve 7 is arranged at the lower end part of the central tube 6, and a lateral viscosity-reducing liquid outlet hole 11-2 opposite to the viscosity-reducing liquid outlet 7-2 is arranged on the lower fixed disk 11; an intermediate sleeve 8 sleeved outside the central tube 6 in a ring manner is arranged between the upper fixed disk 5 and the lower fixed disk 11, a plurality of viscosity-protecting outer adjusting sleeves 10-1 are arranged at the upper part of the inner side of the intermediate sleeve 8, a plurality of viscosity-reducing outer adjusting sleeves 10-2 are arranged at the lower part of the intermediate sleeve 10, the plurality of viscosity-protecting outer adjusting sleeves 10-1 and the plurality of viscosity-reducing outer adjusting sleeves 10-2 are clamped between the upper fixed disk 5 and the lower fixed disk 11, a plurality of viscosity-protecting inner adjusting sleeves 9-1 corresponding to the plurality of viscosity-protecting outer adjusting sleeves 10-1 and a plurality of viscosity-reducing inner adjusting sleeves 9-2 corresponding to the plurality of viscosity-reducing outer adjusting sleeves 10-2 are sleeved outside the central tube 6, the viscosity-protecting inner adjusting sleeve 9-1 positioned at the uppermost position is limited by a step on the central tube 6, the viscosity-reducing inner adjusting sleeve 9-2 positioned at the lowermost position is limited by a baffle ring 12 clamped on the central tube 6, annular convex ribs with arc-shaped axial sections are arranged on the outer side of the viscosity-protecting inner adjusting sleeve 9-1 and the inner side of the viscosity-protecting outer adjusting sleeve 10-1, annular convex ribs with triangular axial sections are arranged on the outer side of the viscosity-reducing inner adjusting sleeve 9-2 and the inner side of the viscosity-reducing outer adjusting sleeve 10-2, a viscosity-protecting annular channel with arc-shaped axial sections is formed between the viscosity-protecting inner adjusting sleeve 9-1 and the viscosity-protecting outer adjusting sleeve 10-1, and a viscosity-reducing annular channel with sharp-tooth-shaped axial sections and communicated with the viscosity-protecting annular channel is formed between the viscosity-reducing inner adjusting sleeve 9-2 and the viscosity-reducing outer adjusting sleeve 10-2.
A polymer liquid inlet 6-1 communicated with the viscosity-protecting channel and the viscosity-reducing channel is arranged on the central tube 6, and the polymer liquid inlet 6-1 is positioned between the viscosity-reducing inner adjusting sleeve 9-2 and the viscosity-protecting inner adjusting sleeve 9-1.
When the central tube 6 moves upwards to a set position, the inlet of the lateral viscosity-reducing liquid outlet hole 5-2 is opened, the lateral viscosity-reducing liquid outlet hole 5-2 is communicated with the viscosity-reducing channel, the viscosity-reducing path is opened, the inner side of the lower fixed disk 11 is hermetically connected with the outer side of the viscosity-reducing outer adjusting sleeve 10-2, the inlet of the lateral viscosity-reducing liquid outlet hole 11-2 is closed, and the viscosity-reducing path is closed; when the central tube 6 moves downwards to a set position, the inlet of the lateral viscosity reduction liquid outlet hole 11-2 is opened, the lateral viscosity reduction liquid outlet hole 11-2 is communicated with the viscosity reduction channel, the viscosity reduction path is opened, the inner side of the upper fixed disc 6 is hermetically connected with the upper end part of the central tube 6, the inlet of the lateral viscosity reduction liquid outlet hole 5-2 is closed, and the viscosity reduction path is closed.
A bridge channel I is formed between the upper connector 1 and the guide positioning part 2 and the adjusting ring 3; a bridge type channel II 5-1 staggered with the lateral viscosity-protecting liquid outlet hole 5-2 is arranged on the upper fixed disc 5; a bridge channel III is formed between the middle sleeve 8 and the outer sleeve 7; a bridge type channel IV 11-1 staggered with the lateral viscosity reduction liquid outlet hole 11-2 is arranged on the lower fixed disc 11; the bridge channel I, the bridge channel II 5-1, the bridge channel III and the bridge channel IV 11-1 form an injection bridge channel communicated with the lower joint 13.
When the device is used for field construction operation, a target layer is placed along with a polymer injection pipe column, fluid is injected from a well head, the fluid is injected into a main channel and an injection bridge channel through the device and is respectively injected into a current stratum and other stratums, when the viscosity protection and reduction functions are measured, adjusted and selected, a cable and a matched adjusting tool are required to be placed to adjust the size of the polymer injection channel and select a liquid outlet path, the injection bridge channel can ensure normal injection of other stratums, and the injection and the adjustment of multilayer section variable viscosity polymers are realized.
As shown in figure 1, when the injection amount of a target layer is adjusted, an injection polymerization measuring and adjusting instrument with a cable is butted with an injection polymerization device at a guide positioning part 2, an adjusting arm of the injection polymerization measuring and adjusting instrument is inserted into a longitudinal groove at the inner side of an adjusting ring and is connected with the adjusting arm in a circumferential direction, the adjusting arm rotates to drive the adjusting ring 3 to rotate and move up and down in the guide positioning part 2, the adjusting ring 3 drives a central pipe 6 to move up and down along the axial direction of the device, the central pipe 6 drives a viscosity-protecting inner adjusting sleeve 9-1 and a viscosity-reducing inner adjusting sleeve 9-2 to move up and down along the axial direction, and then the distance between the central pipe and the viscosity-protecting outer adjusting sleeve 10-1 and the distance between the central pipe and the viscosity-reducing outer adjusting sleeve 10-2 are changed, namely the.
The selection of the viscosity protection and reduction functions is realized by controlling the opening and closing of the viscosity protection path and the viscosity reduction path, on the basis of the adjustable polymer injection device, the central tube 6 is controlled to move up and down along the axial direction of the polymer injection device by rotating the adjusting arm of the polymer injection measuring and adjusting instrument matched with the polymer injection device, the contact sealing surfaces of the central tube 6 of the polymer injection device and the upper fixed disk 5 and the lower fixed disk 11 are changed, the opening and closing of the viscosity protection path and the viscosity reduction path are finally realized, and the selection of the viscosity protection and reduction functions is realized.
In the normal liquid injection process, as shown in fig. 2, liquid flows in through the upper connector 1 of the device, one part of the liquid flows through the guiding and positioning part 2 and the central channel of the adjusting ring 3 and directly flows into the central pipe 6, and the other part of the liquid sequentially flows through the bridge channel I including the through hole 2-1 (shown in fig. 3) on the guiding and positioning part 2, the bridge channel II 5-1 on the upper fixing disc 5, the bridge channel III formed between the middle sleeve 8 and the outer sleeve 7 and the bridge channel IV 11-1 on the lower fixing disc 11 and enters the lower connector 13, and is merged with the liquid flowing out from the central pipe 6 and flows into the next stratum together. The fluid flowing into the central pipe 6 is divided into two parts, one part of the fluid continuously flows downwards along the central pipe 6 and enters the lower joint 13, the other part of the fluid enters the viscosity-maintaining channel and the viscosity-reducing channel through the polymer liquid inlet 6-1, and the fluid enters the corresponding viscosity-maintaining channel or the corresponding viscosity-reducing channel according to the switching states of the viscosity-maintaining channel and the viscosity-reducing channel of the injection device, so that the viscosity maintenance or the viscosity reduction of the polymer is realized.
As shown in figure 6, the contact surface of the viscosity-maintaining channel is smooth arc-shaped, liquid flows along the arc surface after entering the viscosity-maintaining channel from the polymer liquid inlet 6-1, and the viscosity-maintaining channel greatly reduces the shearing action on the polymer while reducing the pressure, so that the viscosity-maintaining channel has the viscosity-maintaining effect on the polymer injected into the well.
As shown in figure 7, the contact surface of the viscosity reduction channel is provided with a plurality of sharp-edged teeth, liquid enters the viscosity reduction channel from the polymer liquid inlet 6-1 and then flows through the viscosity reduction channel axially, friction resistance is increased, fluid pressure reduction is realized, and meanwhile, the shearing effect on fluid is increased, so that the viscosity reduction effect on the polymer injected into the well is achieved.
In the process of carrying out on-site injection allocation operation, firstly, the device is selected with viscosity-protecting or viscosity-reducing functions, and then injection amount allocation operation is carried out according to the stratum requirements. Selecting the viscosity-protecting or viscosity-reducing function: and determining viscosity requirements of different stratum polymers according to geological reservoir requirements, and then controlling the viscosity-preserving path and the viscosity-reducing path of the device to be opened and closed according to the viscosity requirements of the stratum polymers. The specific operation method comprises the following steps: when the central tube 6 is moved upwards to the limit position, the viscosity-protecting path is opened, the viscosity-reducing path is closed, and the device has the viscosity-protecting function; when the central pipe 6 is moved downwards to the limit position, the viscosity-protecting path is closed, and the viscosity-reducing path is opened, as shown in fig. 2, the device has the viscosity-reducing function. And (3) preparation of injection amount: after the viscosity protection or viscosity reduction is determined, the injection amount of the stratum is adjusted according to the requirement of the stratum, when the viscosity protection is needed, the central pipe 6 is adjusted in the forward direction to be in the upper limit position, the drift diameter in the viscosity protection channel is the largest, the central pipe 6 is adjusted in the reverse direction, the drift diameter in the viscosity protection channel is gradually reduced, when the central pipe is adjusted to the set position, the drift diameter in the viscosity protection channel reaches the minimum state, the central pipe 6 is adjusted in the reverse direction continuously, the viscosity protection path starts to be closed, and the adjustment is continued until the viscosity protection path is completely closed; similarly, when viscosity reduction is needed, the central tube 6 is firstly adjusted in a reverse direction to be at a limit lower position, the drift diameter in the viscosity reduction channel is the largest, the central tube 6 is adjusted in a forward direction, the drift diameter in the viscosity reduction channel is gradually reduced, when the central tube 6 is adjusted to a set position, the drift diameter in the viscosity reduction channel reaches a minimum state, the central tube 6 is continuously adjusted in the forward direction, the viscosity reduction path starts to be closed, and the adjustment is continued until the viscosity reduction path is completely closed.
In the present embodiment, the adjusting ring 3 is fixedly connected to the driving ring 4, and the driving ring 4 is rotatably connected to the central tube 6. The structure that the adjusting ring 3 is rotationally connected with the driving ring 4 and the driving ring 4 is fixedly connected with the central pipe 6 can also be adopted. The polymer inlet 6-1 is arranged in the middle of the central tube 6.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (3)
1. A downhole injection device capable of changing polymer viscosity comprises an upper joint, an outer sleeve and a lower joint which are sequentially connected from top to bottom, and is characterized in that a viscosity-maintaining liquid outlet and a viscosity-reducing liquid outlet are arranged on the side wall of the outer sleeve;
a guide positioning part is fixedly connected inside the upper joint;
the inner side of the outer sleeve is provided with a matching and injection adjusting mechanism which integrates the functions of viscosity protection and viscosity reduction, the matching and injection adjusting mechanism comprises an adjusting ring, a driving ring and a central pipe which are sequentially connected from top to bottom, the adjusting ring is in threaded connection with the guiding and positioning part, and the inner side of the adjusting ring is provided with a longitudinal groove which is circumferentially connected with an adjusting arm of the injection concentration measuring and adjusting instrument;
the outer diameter of the upper end part of the central tube is larger, the upper end of the central tube is connected with the adjusting ring through the driving ring, and the central tube moves up and down through the rotation of the adjusting ring; an upper fixed disc fixedly connected with the outer sleeve is arranged at the upper end part of the central tube, the upper fixed disc is arranged below the driving ring, a lateral viscosity-maintaining liquid outlet hole opposite to the viscosity-maintaining liquid outlet on the outer sleeve is arranged on the upper fixed disc, a lower fixed disc fixedly connected with the outer sleeve is arranged at the lower end part of the central tube, and a lateral viscosity-reducing liquid outlet hole opposite to the viscosity-reducing liquid outlet on the outer sleeve is arranged on the lower fixed disc; go up the fixed disk with be equipped with the ring cover between the fixed disk down the middle sleeve pipe in the center tube outside middle sheathed tube inboard upper portion is equipped with a plurality of guarantor and glues outer adjusting collar, and the lower part is equipped with a plurality of viscosity reduction outer adjusting collar the outside cover of center tube is equipped with a plurality of guarantor that glues outer adjusting collar one-to-one glues interior adjusting collar and with a plurality of the outer adjusting collar one-to-one's of viscosity reduction a plurality of viscosity reduction interior adjusting collar the outside of guarantor gluing interior adjusting collar and the inboard of guarantor gluing outer adjusting collar all is equipped with the annular bead that axial section is convex the outside of the inner adjusting collar of viscosity reduction and the inboard of the outer adjusting collar all is equipped with the annular bead that axial section is triangle-shaped the viscosity reduction interior adjusting collar with guarantor glues annular channel that axial section is the bow wave between the outer adjusting collar of guarantor gluing, be formed with between the viscosity reduction outer adjusting collar with guarantor gluing annular channel and link to each other The axial section of the through hole is a sharp-tooth-wave viscosity reduction annular channel;
a polymer liquid inlet communicated with the viscosity-maintaining channel and the viscosity-reducing channel is formed in the central tube, and the polymer liquid inlet is positioned between the viscosity-reducing inner adjusting sleeve and the viscosity-maintaining inner adjusting sleeve;
when the central tube moves upwards to a set position, the inlet of the lateral viscosity-reducing liquid outlet is opened, the lateral viscosity-reducing liquid outlet is communicated with the viscosity-reducing channel, the inner side of the lower fixed disc is hermetically connected with the outer side of the viscosity-reducing outer adjusting sleeve, and the inlet of the lateral viscosity-reducing liquid outlet is closed; when the central tube moves downwards to a set position, the inlet of the lateral viscosity-reducing liquid outlet is opened, the lateral viscosity-reducing liquid outlet is communicated with the viscosity-reducing channel, the inner side of the upper fixed disc is hermetically connected with the upper end part of the central tube, and the inlet of the lateral viscosity-reducing liquid outlet is closed;
a bridge channel I is formed between the upper joint and the guide positioning part and the adjusting ring; a bridge type channel II staggered with the lateral viscosity-protecting liquid outlet hole is arranged on the upper fixed disc; a bridge channel III is formed between the middle sleeve and the outer sleeve; a bridge type channel IV staggered with the lateral viscosity reduction liquid outlet hole is arranged on the lower fixed disc; the bridge channel I, the bridge channel II, the bridge channel III and the bridge channel IV form an injection bridge channel communicated with the lower joint.
2. The downhole injection device of claim 1, wherein the adjustment ring is secured to the drive ring, the drive ring being rotationally coupled to the base pipe.
3. The downhole injection device of claim 1, wherein the polymer fluid inlet is disposed in the middle of the base pipe.
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| CN201810813624.3A CN109025927B (en) | 2018-07-23 | 2018-07-23 | Underground injection device capable of changing polymer viscosity |
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| CN110397427A (en) * | 2019-06-17 | 2019-11-01 | 浙江金龙自控设备有限公司 | A kind of low sheraing pressure regulation Injecting polymer unit |
| CN112682011B (en) * | 2020-12-28 | 2022-07-29 | 中国海洋石油集团有限公司 | Chemical flooding multi-medium central channel type injection allocation device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299917A (en) * | 2000-03-01 | 2001-06-20 | 大庆石油管理局采油工艺研究所 | Polymer depositing well flow rate controller |
| CN2923998Y (en) * | 2006-01-06 | 2007-07-18 | 长江大学 | Separated layer polymer-injection distributor |
| CN101525991A (en) * | 2009-04-13 | 2009-09-09 | 中国海洋石油总公司 | Hydraulic-driven mixer for injection |
| AU2010282387A1 (en) * | 2009-08-13 | 2012-02-23 | Baker Hughes Incorporated | Apparatus and method for passive fluid control in a wellbore |
| US20150159079A1 (en) * | 2013-12-10 | 2015-06-11 | Board Of Regents, The University Of Texas System | Methods and compositions for conformance control using temperature-triggered polymer gel with magnetic nanoparticles |
| CN104963665A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Bridge type concentric profile control water distribution device |
| CN106837275A (en) * | 2017-01-13 | 2017-06-13 | 中国海洋石油总公司 | A kind of large-discharge single pipe layered polymer injection tunable arrangement |
-
2018
- 2018-07-23 CN CN201810813624.3A patent/CN109025927B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299917A (en) * | 2000-03-01 | 2001-06-20 | 大庆石油管理局采油工艺研究所 | Polymer depositing well flow rate controller |
| CN2923998Y (en) * | 2006-01-06 | 2007-07-18 | 长江大学 | Separated layer polymer-injection distributor |
| CN101525991A (en) * | 2009-04-13 | 2009-09-09 | 中国海洋石油总公司 | Hydraulic-driven mixer for injection |
| AU2010282387A1 (en) * | 2009-08-13 | 2012-02-23 | Baker Hughes Incorporated | Apparatus and method for passive fluid control in a wellbore |
| US20150159079A1 (en) * | 2013-12-10 | 2015-06-11 | Board Of Regents, The University Of Texas System | Methods and compositions for conformance control using temperature-triggered polymer gel with magnetic nanoparticles |
| CN104963665A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Bridge type concentric profile control water distribution device |
| CN106837275A (en) * | 2017-01-13 | 2017-06-13 | 中国海洋石油总公司 | A kind of large-discharge single pipe layered polymer injection tunable arrangement |
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