CN114109306B - Injection valve structure and application method thereof - Google Patents
Injection valve structure and application method thereof Download PDFInfo
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- CN114109306B CN114109306B CN202010893424.0A CN202010893424A CN114109306B CN 114109306 B CN114109306 B CN 114109306B CN 202010893424 A CN202010893424 A CN 202010893424A CN 114109306 B CN114109306 B CN 114109306B
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- injection valve
- rubber ring
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The application relates to an injection valve structure and a use method thereof, wherein the structure comprises a central tube, a first central hole is arranged in the central tube, and a medicament injection pore canal is arranged on the side wall of the central tube; the outer wall of the central tube is sleeved with a high-molecular heat energy material unit which can be heated and expanded; the central tube is sleeved with a control valve, the control valve is provided with a steam injection valve port, the control valve can slide to the medicament injection pore canal under the expansion pushing action of the high polymer heat energy material unit, and the steam injection valve port can be closed and can be communicated with the medicament injection pore canal in a downward sliding way to form a quantitative steam injection pore canal. The application can meet the requirement of medicament injection in profile control construction and steam injection in multi-point steam injection, realizes the profile control construction and multi-point steam injection of an oil well by one-time pipe column, does not need a special profile control pipe column, saves the operation cost of lifting and lowering the pipe column, effectively shortens the measure construction period and greatly improves the production time rate of the oil well.
Description
Technical Field
The application relates to the technical field of oil extraction processes, in particular to an injection valve structure capable of realizing oil well profile control and multi-point steam injection by a primary pipe column and a use method thereof.
Background
Because the horizontal well has the characteristics of long well section and various stratum physical properties, the situation of uneven use of the horizontal section exists in the development process, and the development effect of the horizontal well is seriously influenced. At present, aiming at the situation that the use degree of a horizontal well is uneven, the use degree of a horizontal section is generally improved by adopting an oil well profile control and multi-point steam injection mode, however, in practical application of measures, as the profile control construction is carried out by adopting a weak gel system, large pore canal is needed for injection, a profile control pipe column is generally adopted, the shearing action of a medicament can be effectively prevented, and the multi-point steam injection adopts a steam injection valve for fixed-point quantitative injection of steam, the injection hole diameter of the steam injection valve is smaller, the injection of gel is unfavorable, therefore, the profile control construction is needed to be carried out by firstly lowering the profile control pipe column, then the profile control pipe column is put forward, the multi-point steam injection is needed to be carried out by lowering the multi-point steam injection valve matched pipe column again, the whole process needs to be invested in large operation cost, and meanwhile, the operation time of measures is prolonged, and the production time rate of an oil well is influenced.
In the prior art, a steam injection valve (patent CN 202047790U) can realize the multi-point uniform injection of steam, but because the tool steam flow-through hole is too small, if the oil well profile control construction is carried out, the shearing action is generated on the injected medicament, and the effect of the gel medicament is affected. Therefore, if profile control is performed, a special pipe column is needed to be put into, and after construction is completed, a multi-point steam injection valve is put into for steam injection, so that the construction time is long and the operation cost is high.
Accordingly, the present inventors have developed an injection valve structure and method of use thereof to overcome the shortcomings of the prior art by years of experience and practice in the relevant industry.
Disclosure of Invention
The application aims to provide an injection valve structure and a use method thereof, which overcome the problems in the prior art, can meet the requirement of medicament injection in profile control construction, can also meet the requirement of steam injection in multi-point steam injection, realize profile control construction and multi-point steam injection of an oil well by one-time pipe column, and do not need a special profile control pipe column, thereby saving the operation cost of lifting and lowering the pipe column, effectively shortening the measure construction period and greatly improving the production time rate of the oil well.
The injection valve structure comprises a central pipe, wherein a first central hole is axially and penetratingly arranged in the central pipe, and a medicament injection pore canal which can be communicated with the first central hole is arranged at the lower part of the side wall of the central pipe; a high molecular heat energy material unit is sleeved on the outer wall of the central tube above the medicament injection pore canal, and the high molecular heat energy material unit can be heated to expand along the axial direction of the central tube; the control valve is sleeved between the medicament injection duct and the high-molecular heat energy material unit, the control valve is provided with a steam injection valve port, the control valve can slide to the medicament injection duct under the expansion pushing action of the high-molecular heat energy material unit, and the steam injection valve port can be closed and can be communicated with the medicament injection duct in a downward sliding mode to form a quantitative steam injection duct.
In a preferred embodiment of the present application, an outer sleeve is sleeved at radial intervals on the outer side of the central tube, a first rubber ring and a second rubber ring are sleeved at axial intervals in an annulus between the central tube and the outer sleeve, a filling annulus is formed among the central tube, the first rubber ring, the second rubber ring and the outer sleeve, the high polymer heat energy material unit is arranged in the filling annulus, and the second rubber ring and the control valve are axially propped against each other; the control valve can be fixedly connected to the outer sleeve and can slide along the outer sleeve under the expansion pushing action of the high polymer heat energy material unit.
In a preferred embodiment of the present application, a convex ring portion with an increased diameter is disposed on an outer wall of the central tube, two ends of the convex ring portion respectively form a first step portion and a second step portion, a bottom end face of the first rubber ring can axially abut against the first step portion, and a top end face of the second rubber ring can axially abut against the second step portion.
In a preferred embodiment of the application, a connecting nipple is connected to the top end of the annulus between the central tube and the outer sleeve in a sealing manner, a second central hole is arranged in the connecting nipple in an axial through manner, and the second central hole is communicated with the first central hole; the bottom end face of the connecting nipple constitutes an upper limit part of the first rubber ring.
In a preferred embodiment of the present application, the inner wall of the connecting nipple is screwed onto the outer wall of the central tube, and the inner wall of the outer sleeve is screwed onto the outer wall of the connecting nipple.
In a preferred embodiment of the present application, first grooves are axially spaced on the inner wall of the first rubber ring, and second grooves are axially spaced on the outer wall of the first rubber ring; third grooves are formed in the inner wall of the second rubber ring at intervals along the axial direction, and fourth grooves are formed in the outer wall of the second rubber ring at intervals along the axial direction.
In a preferred embodiment of the application, the outer sleeve and the control valve are connected by a shear pin; the side wall of the outer sleeve is penetrated with a pin through hole, the outer wall of the control valve is provided with a pin connecting hole, and the shearing pin is connected into the pin connecting hole after passing through the pin through hole.
In a preferred embodiment of the present application, a centralizing block is sleeved on the outer wall of the central tube below the medicament injection hole.
In a preferred embodiment of the present application, the medicine injection hole is formed in an oblong shape, and a long axis of the oblong shape is disposed along an axial direction of the first central tube.
In a preferred embodiment of the present application, the number of the drug injection channels is plural, and the plural drug injection channels are uniformly spaced apart in the circumferential direction.
The object of the application is also achieved by a method of using an injection valve structure as described above, comprising the steps of:
step a, connecting the injection valve structure to a tubular column, and setting the injection valve structure at a designated position in a well;
step b, profile control construction: the profile control agent is injected into the stratum through the first central hole and the agent injection pore canal;
step c, steam injection: after the profile control construction is finished, displacing clear water until no profile control medicament remains, directly injecting steam without lifting a tubular column, and enabling the steam to enter a stratum through a medicament injection pore channel; as the well temperature rises to a certain extent, the high polymer heat energy material unit is heated and expanded, when the well temperature reaches a certain temperature, the high polymer heat energy material unit pushes the control valve to slide to the medicament injection pore canal, the steam injection valve port is communicated with the medicament injection pore canal, and steam is quantitatively injected through the set steam injection valve port.
Therefore, the injection valve structure and the application method thereof provided by the application have the following beneficial effects:
the injection valve structure and the application method thereof provided by the application can not only meet the requirement of medicament injection in profile control construction, but also meet the requirement of steam injection in multi-point steam injection, realize the completion of profile control construction and multi-point steam injection of an oil well by a primary pipe column, and do not need a special profile control pipe column, thereby saving the operation cost of lifting and lowering the pipe column, effectively shortening the measure construction period and greatly improving the production time rate of the oil well; the high molecular heat energy material unit can expand to push the control valve after reaching the required temperature, so that the safety of underground construction is high; the first rubber ring and the second rubber ring are both made of high-temperature resistant sealing materials, so that the tightness of the injection valve structure is ensured, and the construction is safer and more reliable; the medicament injection pore canal is arranged in a long circle, the liquid flow cross section area is larger, and when the profile control construction is carried out, the medicament enters the stratum through the long circle medicament injection pore canal, so that the shearing action and the throttling action of the medicament can be reduced, and the medicament is smoothly injected into the stratum.
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 is a schematic structural view of an injection valve structure of the present application.
Fig. 2 is an external view of the injection valve structure of the present application.
Fig. 3 is a schematic structural view of the central tube of the present application.
Fig. 4 is a schematic structural view of the outer sleeve of the present application.
Fig. 5 is a schematic structural view of a first rubber ring according to the present application.
Fig. 6 is a schematic structural view of a second rubber ring according to the present application.
Fig. 7 is a schematic view of the injection valve of the present application after shearing of the shear pin in the operational state.
In the figure:
100. an injection valve structure;
1. a central tube;
10. a first central bore; 11. a medicament injection port; 12. a convex ring portion; 121. a first step portion; 122. a second step portion;
2. a high molecular thermal energy material unit;
3. a control valve; 31. a steam injection valve port;
4. an outer sleeve; 41. pin via holes;
51. a first rubber ring; 511. a first groove; 512. a second groove; 52. the second rubber ring; 521. a third groove; 522. a fourth groove;
6. a connecting nipple; 60. a second central bore;
7. shearing pins;
8. strengthening the body resistance.
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 7, the present application provides an injection valve structure 100, comprising a central tube 1, a first central hole 10 is axially and penetratingly arranged in the central tube 1, and a medicine injection duct 11 capable of communicating with the first central hole 10 is arranged at the lower part of the side wall of the central tube 1; the outer wall of the central tube 1 is sleeved with a high molecular heat energy material unit 2 above the medicament injection pore canal 11, and the high molecular heat energy material unit 2 can be heated to expand along the axial direction of the central tube; the control valve 3 is sleeved between the medicament injection pore canal 11 and the high polymer heat energy material unit 2 on the central tube 1, the steam injection valve port 31 is arranged on the control valve 3, the control valve 3 can slide to the medicament injection pore canal 11 under the expansion pushing action of the high polymer heat energy material unit, and the steam injection valve port 31 can be closed and can be communicated with the medicament injection pore canal 11 in a downward sliding mode to form a quantitative steam injection pore canal. The aperture of the steam injection valve opening 31 is adjusted according to the displacement requirement of the steam injection design.
When the injection valve structure 100 is used for profile control construction, a profile control agent (weak gel, etc.) enters the stratum through the first central hole 10 and the agent injection pore canal 11; after profile control construction is completed, steam injection can be directly carried out by transferring without lifting out a pipe column, and steam can enter stratum through a medicament injection pore canal 11; along with the rise of the well temperature to a certain degree, the high polymer heat energy material unit 2 (thermosensitive medicament) is heated (the heat source is injected high-temperature steam) to expand, the control valve 3 is pushed to slide to the medicament injection pore canal 11, the medicament injection pore canal 11 is gradually closed and continuously slides downwards, the steam injection valve opening 31 is communicated with the medicament injection pore canal 11, and the steam is quantitatively injected through the steam injection valve opening 31 set on the control valve.
The injection valve structure provided by the application can not only meet the requirement of medicament injection in profile control construction, but also meet the requirement of steam injection in multi-point steam injection, realizes the profile control construction and multi-point steam injection of an oil well by one-time pipe column, does not need a special profile control pipe column, saves the operation cost of lifting and lowering the pipe column, effectively shortens the measure construction period, and greatly improves the production time rate of the oil well; the high molecular heat energy material unit can expand to push the control valve after reaching the required temperature, and the underground construction safety is high.
Further, as shown in fig. 1, 2 and 3, the outer side of the central tube 1 is radially sleeved with an outer sleeve 4 at intervals, the annular space between the central tube 1 and the outer sleeve 4 is axially sleeved with a first rubber ring 51 and a second rubber ring 52 at intervals, a filling annular space is formed among the central tube 1, the first rubber ring 51, the second rubber ring 52 and the outer sleeve 4, the high polymer heat energy material unit 2 is arranged in the filling annular space, and the second rubber ring 52 and the control valve 3 are axially propped against each other; the control valve 3 can be fixedly connected to the outer sleeve 4 and can slide along the outer sleeve 4 under the expansion pushing action of the high polymer thermal energy material unit 2. The first rubber ring 51 and the second rubber ring 52 are made of high-temperature-resistant sealing materials, so that the tightness of the injection valve structure 100 is guaranteed, and the construction is safer and more reliable.
Further, as shown in fig. 1 and 3, a convex ring portion 12 with an increased diameter is provided on the outer wall of the central tube 1, two ends of the convex ring portion 12 respectively form a first step portion 121 and a second step portion 122, the bottom end face of the first rubber ring 51 can axially abut against the first step portion 121, and the top end face of the second rubber ring 52 can axially abut against the second step portion 122. The first step portion 121 and the second step portion 122 can respectively limit the first rubber ring 51 and the second rubber ring 52 in the axial direction, so that the stability and the reliability of the injection valve structure 100 are ensured.
Further, as shown in fig. 1, a connecting nipple 6 is connected to the top end of the annulus between the central tube 1 and the outer sleeve 4 in a sealing manner, a second central hole 60 is arranged in the connecting nipple 6 in an axial through manner, and the second central hole 60 is communicated with the first central hole 10; the bottom end face of the connecting nipple 6 forms an upper limit part of the first rubber ring 51, and the high-molecular heat energy material unit 2 expands to push the first rubber ring 51 to move towards the connecting nipple 6, and the end face of the high-molecular heat energy material unit abuts against the connecting nipple 6 to stop moving. The connection nipple 6 is used for connecting an upper tubular column, and facilitates connection between the central tube 1 and the outer sleeve 4 in the injection valve structure 100.
In this embodiment, the inner wall of the connection nipple 6 is screwed onto the outer wall of the central pipe 1, and the inner wall of the outer sleeve 4 is screwed onto the outer wall of the connection nipple 6.
Further, as shown in fig. 5 and 6, first grooves 511 are axially spaced on the inner wall of the first rubber ring 51, and second grooves 512 are axially spaced on the outer wall of the first rubber ring 51; third grooves 521 are axially spaced on the inner wall of the second rubber ring 52, and fourth grooves 522 are axially spaced on the outer wall of the second rubber ring 52. Grooves are formed in the first rubber ring 51 and the second rubber ring 52, so that flexibility of the first rubber ring 51 and the second rubber ring 52 is improved, and processing and installation are facilitated.
Further, as shown in fig. 1 and 4, the outer sleeve 4 and the control valve 3 are connected by a shear pin 7; the side wall of the outer sleeve 4 is penetrated with a pin through hole 41, the outer wall of the control valve 3 is provided with a pin connecting hole, and the shearing pin 7 is connected into the pin connecting hole after passing through the pin through hole. At the beginning of the assembly of the injection valve structure 100, the control valve 3 is fixedly connected with the outer sleeve 4 through the shear pin 7; in the steam injection process, as the well temperature rises, the high polymer heat energy material unit 2 (the heat sensitive medicament) is heated (the heat source is injected high-temperature steam), when the high polymer heat energy material unit 2 is heated and expanded, the acting force of the shearing pin 7 is larger than the shearing force of the shearing pin 7, the shearing pin 7 is sheared, the control valve 3 slides to the medicament injection pore canal 11, the medicament injection pore canal 11 is gradually closed and continuously slides downwards, the steam injection valve opening 31 is communicated with the medicament injection pore canal 11, and the steam is quantitatively injected through the steam injection valve opening 31 set on the control valve.
Further, as shown in fig. 1 and 2, a centralizing block 8 is sleeved below the medicament injection hole on the outer wall of the central tube 1, and the centralizing block 8 can axially limit the bottom end of the control valve. The centering block 8 stably centers the central pipe 1 and forms an axial limiting part of the control valve 3, so that the safety of the construction process is ensured.
Further, as shown in fig. 1 and 4, the drug injection port 11 is formed in an oblong shape, and the long axis of the oblong shape is disposed along the axial direction of the first central tube. In the present embodiment, the number of the medicine injection holes 11 is plural, and the plural medicine injection holes 11 are arranged at regular intervals in the circumferential direction. The medicament injection pore canal 11 is arranged in an oblong shape, the liquid flow cross section area is larger, and when the profile control construction is carried out, the medicament enters the stratum through the oblong medicament injection pore canal 11, so that the shearing action and the throttling action of the medicament can be reduced, and the medicament is smoothly injected into the stratum.
The method of using the injection valve structure 100 provided by the present application is as follows:
step a, connecting an injection valve structure 100 to a pipe column, and setting the injection valve structure at a designated position in a well;
step b, profile control construction: the profile control agent (weak gel, etc.) is injected into the formation through the second central hole 60, the first central hole 10 and the agent injection hole 11; the state of the injection valve structure 100 is shown in fig. 1;
step c, steam injection: after the profile control construction is finished, displacing clear water until no profile control agent remains, directly injecting steam without lifting a pipe column, and enabling the steam to enter the stratum through the agent injection pore canal 11; as the well temperature rises to a certain extent, the high polymer thermal energy material unit 2 (the heat sensitive agent) is heated (the heat source is injected high temperature steam) to expand, when the high polymer thermal energy material unit 2 is heated to expand, the acting force of the shearing pin 7 is larger than the shearing force of the shearing pin 7, the shearing pin 7 is sheared, the control valve 3 slides to the agent injection pore canal 11, the agent injection pore canal 11 is gradually closed and continuously slides downwards, the bottom end of the control valve 3 stops moving when propping against the centralizing block 8, at the moment, the steam injection valve opening 31 is communicated with the agent injection pore canal 11, the steam is quantitatively injected through the steam injection valve opening 31 set on the control valve, and the state of the injection valve structure 100 is shown in fig. 7.
Examples: taking a horizontal well with a casing inner diameter of 177.8mm and a well depth of 2126m as an example, the reservoir is 213.65m, the position is 1751.35-1965m, the steam injection points are 1785 m, 1865 m and 1922 m, and the injection valve structure 100 is used for oil well profile control and multi-point steam injection, so that the application is further described in detail.
Step A, firstly, according to the displacement requirement of the steam injection design, the aperture of the steam injection valve port 31 on the control valve 3 is adjusted.
Step B, closing the sleeve gate, and connecting the pump truck and the oil pipe gate (prior art, not shown). And the pressure of the construction pipeline is tested to 18MPa, so that the pipeline is ensured to be free from puncture and leakage.
Step C, opening the wellhead main gate and the tubing gate (prior art, not shown).
And D, pumping the profile control agent into the oil pipe by using a pump truck, entering a target layer through each agent injection hole 11, and recording wellhead pressure.
And E, after the profile control agent is extruded into the stratum, displacing clean water until no profile control agent residue exists in the oil pipe, and stopping the pump.
And F, disconnecting the construction pipeline, and connecting the steam injection pipeline for steam injection construction after the pressure of the dead well is zero.
Therefore, the injection valve structure and the application method thereof provided by the application have the following beneficial effects:
the injection valve structure and the application method thereof provided by the application can not only meet the requirement of medicament injection in profile control construction, but also meet the requirement of steam injection in multi-point steam injection, realize the completion of profile control construction and multi-point steam injection of an oil well by a primary pipe column, and do not need a special profile control pipe column, thereby saving the operation cost of lifting and lowering the pipe column, effectively shortening the measure construction period and greatly improving the production time rate of the oil well; the high molecular heat energy material unit can expand to push the control valve after reaching the required temperature, so that the safety of underground construction is high; the first rubber ring and the second rubber ring are both made of high-temperature resistant sealing materials, so that the tightness of the injection valve structure is ensured, and the construction is safer and more reliable; the medicament injection pore canal is arranged in a long circle, the liquid flow cross section area is larger, and when the profile control construction is carried out, the medicament enters the stratum through the long circle medicament injection pore canal, so that the shearing action and the throttling action of the medicament can be reduced, and the medicament is smoothly injected into the stratum.
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 (11)
1. The injection valve structure is characterized by comprising a central pipe, wherein a first central hole is axially and penetratingly arranged in the central pipe, and a medicament injection pore canal which can be communicated with the first central hole is arranged at the lower part of the side wall of the central pipe; a high molecular heat energy material unit is sleeved on the outer wall of the central tube above the medicament injection pore canal, and the high molecular heat energy material unit can be heated to expand along the axial direction of the central tube; the control valve is sleeved between the medicament injection duct and the high-molecular heat energy material unit, the control valve is provided with a steam injection valve port, the control valve can slide to the medicament injection duct under the expansion pushing action of the high-molecular heat energy material unit, and the steam injection valve port can be closed and can be communicated with the medicament injection duct in a downward sliding mode to form a quantitative steam injection duct.
2. The injection valve structure of claim 1, wherein an outer sleeve is sleeved on the outer side of the central tube at radial intervals, a first rubber ring and a second rubber ring are sleeved in an annular space between the central tube and the outer sleeve at axial intervals, a filling annular space is formed among the central tube, the first rubber ring, the second rubber ring and the outer sleeve, the high polymer heat energy material unit is arranged in the filling annular space, and the second rubber ring and the control valve are axially propped against each other; the control valve can be fixedly connected to the outer sleeve and can slide along the outer sleeve under the expansion pushing action of the high polymer heat energy material unit.
3. The injection valve structure of claim 2, wherein a convex ring portion with an increased diameter is arranged on the outer wall of the central tube, two ends of the convex ring portion respectively form a first step portion and a second step portion, the bottom end face of the first rubber ring can axially abut against the first step portion, and the top end face of the second rubber ring can axially abut against the second step portion.
4. The injection valve structure of claim 3 wherein a connection nipple is sealingly connected to a top end of an annulus between the center tube and the outer sleeve, the connection nipple having a second central bore extending axially therethrough, the second central bore being in communication with the first central bore; the bottom end face of the connecting nipple constitutes an upper limit part of the first rubber ring.
5. The injection valve structure of claim 4 wherein the inner wall of said connection nipple is threadably received on the outer wall of said center tube and the inner wall of said outer sleeve is threadably received on the outer wall of said connection nipple.
6. The injection valve structure of claim 3 wherein first grooves are axially spaced on an inner wall of said first rubber ring and second grooves are axially spaced on an outer wall of said first rubber ring; third grooves are formed in the inner wall of the second rubber ring at intervals along the axial direction, and fourth grooves are formed in the outer wall of the second rubber ring at intervals along the axial direction.
7. The injection valve structure of claim 2 wherein said outer sleeve and said control valve are connected by shear pins; the side wall of the outer sleeve is penetrated with a pin through hole, the outer wall of the control valve is provided with a pin connecting hole, and the shearing pin is connected into the pin connecting hole after passing through the pin through hole.
8. The injection valve structure of claim 2 wherein a centralizing block is sleeved on the outer wall of said center tube below said medicament injection port.
9. The injection valve structure of claim 2, wherein the drug injection port is formed in an oblong shape, and a long axis of the oblong shape is disposed along an axial direction of the central tube.
10. The injection valve structure of claim 9, wherein the number of said drug injection ports is plural, and the plural drug injection ports are arranged at regular intervals in the circumferential direction.
11. A method of using the injection valve structure of any one of claims 1 to 10, comprising the steps of:
step a, connecting the injection valve structure to a tubular column, and setting the injection valve structure at a designated position in a well;
step b, profile control construction: the profile control agent is injected into the stratum through the first central hole and the agent injection pore canal;
step c, steam injection: after the profile control construction is finished, displacing clear water until no profile control medicament remains, directly injecting steam without lifting a tubular column, and enabling the steam to enter a stratum through a medicament injection pore channel; as the well temperature rises to a certain extent, the high polymer heat energy material unit is heated and expanded, when the well temperature reaches a certain temperature, the high polymer heat energy material unit pushes the control valve to slide to the medicament injection pore canal, the steam injection valve port is communicated with the medicament injection pore canal, and steam is quantitatively injected through the set steam injection valve port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010893424.0A CN114109306B (en) | 2020-08-31 | 2020-08-31 | Injection valve structure and application method thereof |
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| CN202010893424.0A CN114109306B (en) | 2020-08-31 | 2020-08-31 | Injection valve structure and application method thereof |
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| CN114109306B true CN114109306B (en) | 2023-11-28 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5085275A (en) * | 1990-04-23 | 1992-02-04 | S-Cal Research Corporation | Process for conserving steam quality in deep steam injection wells |
| CN2585975Y (en) * | 2002-11-22 | 2003-11-12 | 中国石油天然气股份有限公司 | Oil well layered steady steam injection device |
| US7032675B2 (en) * | 2003-10-06 | 2006-04-25 | Halliburton Energy Services, Inc. | Thermally-controlled valves and methods of using the same in a wellbore |
| CN104314544A (en) * | 2014-10-24 | 2015-01-28 | 中国石油天然气股份有限公司 | Adjustable annular flow dispensing valve and steam injection string |
| CN204457607U (en) * | 2014-12-26 | 2015-07-08 | 中国石油天然气股份有限公司 | A steam injection check valve |
| CN210483637U (en) * | 2019-07-03 | 2020-05-08 | 中国石油天然气股份有限公司 | Constant quantity steam distribution valve |
-
2020
- 2020-08-31 CN CN202010893424.0A patent/CN114109306B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5085275A (en) * | 1990-04-23 | 1992-02-04 | S-Cal Research Corporation | Process for conserving steam quality in deep steam injection wells |
| CN2585975Y (en) * | 2002-11-22 | 2003-11-12 | 中国石油天然气股份有限公司 | Oil well layered steady steam injection device |
| US7032675B2 (en) * | 2003-10-06 | 2006-04-25 | Halliburton Energy Services, Inc. | Thermally-controlled valves and methods of using the same in a wellbore |
| CN104314544A (en) * | 2014-10-24 | 2015-01-28 | 中国石油天然气股份有限公司 | Adjustable annular flow dispensing valve and steam injection string |
| CN204457607U (en) * | 2014-12-26 | 2015-07-08 | 中国石油天然气股份有限公司 | A steam injection check valve |
| CN210483637U (en) * | 2019-07-03 | 2020-05-08 | 中国石油天然气股份有限公司 | Constant quantity steam distribution valve |
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| Publication number | Publication date |
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| CN114109306A (en) | 2022-03-01 |
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