CN114109306A - Injection valve structure and using method thereof - Google Patents
Injection valve structure and using method thereof Download PDFInfo
- Publication number
- CN114109306A CN114109306A CN202010893424.0A CN202010893424A CN114109306A CN 114109306 A CN114109306 A CN 114109306A CN 202010893424 A CN202010893424 A CN 202010893424A CN 114109306 A CN114109306 A CN 114109306A
- Authority
- CN
- China
- Prior art keywords
- injection
- central tube
- wall
- rubber ring
- steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 102
- 239000007924 injection Substances 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003814 drug Substances 0.000 claims abstract description 61
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 58
- 239000011148 porous material Substances 0.000 claims abstract description 51
- 238000010276 construction Methods 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 32
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 238000010008 shearing Methods 0.000 claims description 15
- 210000002445 nipple Anatomy 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003129 oil well Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Images
Classifications
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- 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
- 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
-
- 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Abstract
The invention relates to an injection valve structure and a using method thereof, wherein the structure comprises a central tube, a first central hole is arranged in the central tube, and a medicament injection pore channel 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 expand by heating; the central pipe 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 passage under the expansion pushing action of the high polymer thermal energy material unit, and the steam injection valve port can be closed and can slide downwards to be communicated with the medicament injection pore passage to form a quantitative steam injection pore passage. The invention can satisfy the injection of chemicals for profile control construction and the injection of steam for multi-point steam injection, realizes that the profile control construction and the multi-point steam injection of an oil well are completed by one tubular column, does not need a special profile control tubular column, not only saves the operating cost of pulling and running the tubular column, effectively shortens the construction period of measures, but also greatly improves the production time rate of the oil well.
Description
Technical Field
The invention 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 using method thereof.
Background
Because the horizontal well has the characteristics of long well section and various stratum physical properties, the condition of uneven horizontal section utilization is frequently existed during development, and the development effect of the horizontal well is seriously influenced. At present, aiming at the condition of uneven utilization degree of a horizontal well, the utilization degree of a horizontal section is improved by adopting the modes of oil well profile control and multi-point steam injection generally, however, in the practical application of measures, because a system of weak gel is mostly adopted in the profile control construction, a large pore is needed for injection, a profile control pipe column is generally adopted, the shearing action of a medicament can be effectively prevented, the multi-point steam injection adopts a steam injection valve to carry out fixed-point quantitative injection of steam, the diameter of an injection hole of the steam injection valve is small, and the gel injection is not beneficial to the injection, therefore, the profile control pipe column needs to be put into the profile control pipe column for profile control construction firstly, then the profile control pipe column is put out, the multi-point steam injection valve matching pipe column is put into the multi-point steam injection again, the whole process needs to put into high operation cost, meanwhile, the operation time of the measures is prolonged, and the production rate of the oil well is influenced.
In the prior art, a steam injection valve (patent CN202047790U) can realize multi-point uniform injection of steam, but because the steam overflow aperture of a tool is too small, if oil well profile control construction is carried out, a shearing effect is generated on injected medicaments, and the effect of gel medicaments is influenced. Therefore, if profile control is carried out, a special tubular column needs to be put in, and a multi-point steam injection valve is put in after construction is finished to inject steam, so that the construction time is long, and the operation cost is high.
Accordingly, the present inventors have developed a fill valve structure and method of using the same that overcome the shortcomings of the prior art by taking years of experience and practice in the related industries.
Disclosure of Invention
The invention aims to provide an injection valve structure and a using method thereof, which overcome the problems in the prior art, can meet the requirements of medicament injection of profile control construction and steam injection of multi-point steam injection, realize that profile control construction and multi-point steam injection of an oil well are completed by one tubular column, do not need a special profile control tubular column, save the operating cost of tripping the tubular column, effectively shorten the construction period of measures, and greatly improve the production time rate of the oil well.
The invention aims to realize the structure, and the structure comprises a central tube, wherein a first central hole is axially arranged in the central tube in a through manner, and a medicament injection pore channel which can be communicated with the first central hole is arranged at the lower part of the side wall of the central tube; the outer wall of the central tube is sleeved with a high-molecular thermal energy material unit above the medicament injection pore passage, and the high-molecular thermal energy material unit can be heated to expand along the axial direction of the central tube; the central pipe is sleeved with a control valve between the medicine injection pore channel and the high polymer thermal energy material unit, the control valve is provided with a steam injection valve port, the control valve can slide to the medicine injection pore channel under the expansion pushing action of the high polymer thermal energy material unit, and the steam injection valve port can be closed and can downwards slide to be communicated with the medicine injection pore channel to form a quantitative steam injection pore channel.
In a preferred embodiment of the present invention, an outer sleeve is radially and alternately sleeved on an outer side of the central tube, a first rubber ring and a second rubber ring are axially and alternately sleeved in an annulus between the central tube and the outer sleeve, a filled annulus is formed among the central tube, the first rubber ring, the second rubber ring and the outer sleeve, the high molecular heat energy material unit is arranged in the filled annulus, and the second rubber ring and the control valve are axially abutted; the control valve can be fixedly connected with the outer sleeve and can slide along the outer sleeve under the expansion pushing action of the high polymer thermal energy material unit.
In a preferred embodiment of the present invention, 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 surface of the first rubber ring can axially abut against the first step portion, and a top end surface of the second rubber ring can axially abut against the second step portion.
In a preferred embodiment of the present invention, a connection nipple is hermetically connected to a top end of an annulus between the central tube and the outer sleeve, a second central hole is axially arranged in the connection nipple in a penetrating manner, and the second central hole is arranged in communication with the first central hole; the bottom end face of the connecting short section forms an upper limit part of the first rubber ring.
In a preferred embodiment of the present invention, the inner wall of the connection nipple is sleeved on the outer wall of the central tube through a thread, and the inner wall of the outer sleeve is sleeved on the outer wall of the connection nipple through a thread.
In a preferred embodiment of the present invention, the inner wall of the first rubber ring is provided with first grooves at intervals along the axial direction, and the outer wall of the first rubber ring is provided with second grooves at intervals along the axial direction; 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 present invention, the outer sleeve and the control valve are connected by shear pins; link up on the lateral wall of outer tube and set up the pin via hole, set up the pin connecting hole on the outer wall of control valve, the shearing pin passes through connect in the pin connecting hole behind the pin via hole.
In a preferred embodiment of the present invention, a centering block is sleeved on the outer wall of the central tube below the drug injection hole.
In a preferred embodiment of the present invention, the medicament injection hole is formed in an oblong shape, and a long axis of the oblong shape is arranged along an axial direction of the first central tube.
In a preferred embodiment of the present invention, the number of the medicine injection holes is plural, and the plural medicine injection holes are uniformly spaced along the circumferential direction.
The object of the invention is also achieved by a method for using a filling valve structure as described above, comprising the steps of:
step a, connecting the injection valve structure to a pipe column and putting the pipe column into a specified position in a well;
step b, profile control construction: injecting the profile control agent into the stratum through the first central hole and the agent injection pore channel;
step c, steam injection: after the profile control construction is finished, replacing clear water until no profile control agent remains, directly injecting steam without pulling out a pipe column, and enabling the steam to enter the stratum through an agent injection pore channel; when the temperature reaches a certain temperature, the high molecular heat energy material unit pushes the control valve to slide to the medicine injection pore passage, the steam injection valve port is communicated with the medicine injection pore passage, and steam is injected quantitatively through the set steam injection valve port.
From the above, the injection valve structure and the use method thereof provided by the invention have the following beneficial effects:
the injection valve structure and the use method thereof provided by the invention can meet the requirements of medicament injection of profile control construction and steam injection of multi-point steam injection, realize that profile control construction and multi-point steam injection of an oil well are completed by one-time tubular column, and no special profile control tubular column is needed, thereby not only saving the operation cost of pulling and pulling the tubular column, effectively shortening the construction period of measures, but also greatly improving the production time rate of the oil well; the high polymer thermal energy material unit can expand to push the control valve after reaching the required temperature, so that the underground construction safety is high; the first rubber ring and the second rubber ring are both made of high-temperature-resistant sealing materials, so that the sealing performance of the injection valve structure is guaranteed, and the construction is safer and more reliable; the medicament injection pore canal is arranged in an oblong shape, the flow cross-sectional area of liquid is large, and when profile control construction is carried out, the medicament enters the stratum through the oblong medicament injection pore canal, so that the shearing action and the throttling action of the medicament can be reduced, and the medicament can be smoothly injected into the stratum.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
fig. 1 is a schematic structural view of a structure of a filling valve of the present invention.
Fig. 2 is an external view of the structure of the filling valve of the present invention.
Fig. 3 is a schematic structural view of the center tube of the present invention.
Fig. 4 is a structural diagram of the outer sleeve of the present invention.
Fig. 5 is a schematic structural diagram of the first rubber ring of the present invention.
Fig. 6 is a schematic structural diagram of a second rubber ring of the present invention.
FIG. 7 is a schematic view of the fill valve structure of the present invention after shear pin shear in the operating condition.
In the figure:
100. an injection valve structure;
1. a central tube;
10. a first central aperture; 11. a medicament injection orifice; 12. a convex ring part; 121. a first step portion; 122. a second step portion;
2. a polymer thermal energy material unit;
3. a control valve; 31. a steam injection valve port;
4. an outer sleeve; 41. a pin hole is formed;
51. a first rubber ring; 511. a first groove; 512. a second groove; 52. a second rubber ring; 521. a third groove; 522. a fourth groove;
6. connecting short sections; 60. a second central aperture;
7. shearing the pin;
8. and (4) a righting block.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. 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," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique 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 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 to 7, the present invention provides an injection valve structure 100, which includes a central tube 1, a first central hole 10 axially penetrating through the central tube 1, and a medicament injection hole 11 capable of communicating with the first central hole 10 disposed at a lower portion of a side wall of the central tube 1; the outer wall of the central tube 1 is sleeved with a high molecular thermal material unit 2 above the medicament injection pore channel 11, and the high molecular thermal material unit 2 can be heated to expand along the axial direction of the central tube; the central tube 1 is sleeved with the control valve 3 between the medicine injection pore canal 11 and the high molecular heat energy material unit 2, the control valve 3 is provided with a steam injection valve port 31, the control valve 3 can slide to the medicine injection pore canal 11 under the expansion pushing action of the high molecular heat energy material unit, and the steam injection valve port 31 can be closed and can slide downwards to communicate with the medicine injection pore canal 11 to form a quantitative steam injection pore canal. The aperture of the steam injection valve port 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, profile control agents (weak gel and the like) enter the stratum through the first central hole 10 and the agent injection pore canal 11; after the profile control construction is finished, the steam can be directly injected by transferring without pulling out a pipe column, and the steam can enter the stratum through the agent injection pore canal 11; along with the well temperature rising to a certain degree, the high polymer thermal energy material unit 2 (thermal sensitive 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 port 31 is communicated with the medicament injection pore canal 11, and steam is quantitatively injected through the steam injection valve port 31 which is set on the control valve.
The injection valve structure provided by the invention can meet the requirements of medicament injection in profile control construction and steam injection in multi-point steam injection, realizes that profile control construction and multi-point steam injection of an oil well are completed by one-time tubular column, does not need a special profile control tubular column, saves the operation cost of pulling and pulling the tubular column, effectively shortens the construction period of measures, and greatly improves the production time rate of the oil well; the high polymer thermal 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, an outer sleeve 4 is radially and alternately sleeved on the outer side of the central tube 1, a first rubber ring 51 and a second rubber ring 52 are axially and alternately sleeved in an annulus between the central tube 1 and the outer sleeve 4, a filled annulus is formed between the central tube 1, the first rubber ring 51, the second rubber ring 52, and the outer sleeve 4, the high molecular thermal energy material unit 2 is arranged in the filled annulus, and the second rubber ring 52 and the control valve 3 are axially abutted; 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 molecular thermal energy material unit 2. The first rubber ring 51 and the second rubber ring 52 are both made of high-temperature-resistant sealing materials, so that the sealing performance of the injection valve structure 100 is guaranteed, and the construction is safer and more reliable.
Further, as shown in fig. 1 and fig. 3, a convex ring portion 12 with an increased diameter is disposed on the outer wall of the central tube 1, a first step portion 121 and a second step portion 122 are respectively formed at two ends of the convex ring portion 12, a bottom end surface of the first rubber ring 51 can axially abut against the first step portion 121, and a top end surface 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 axially limit the first rubber ring 51 and the second rubber ring 52, so that the stability and reliability of the injection valve structure 100 are ensured.
Further, as shown in fig. 1, a connection nipple 6 is hermetically connected to the top end of an annulus between the central tube 1 and the outer sleeve 4, a second central hole 60 axially penetrates through the connection nipple 6, and the second central hole 60 is communicated with the first central hole 10; the bottom end face of the connection short section 6 forms an upper limit part of the first rubber ring 51, the high polymer thermal energy material unit 2 expands to push the first rubber ring 51 to move towards the connection short section 6, and the end face stops moving when abutting against the connection short section 6. The connector sub 6 is used to connect the upper string of tubing to facilitate 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 sleeved on the outer wall of the central tube 1 through threads, and the inner wall of the outer sleeve 4 is sleeved on the outer wall of the connection nipple 6 through threads.
Further, as shown in fig. 5 and 6, first grooves 511 are axially provided at intervals on an inner wall of the first rubber ring 51, and second grooves 512 are axially provided at intervals on an outer wall of the first rubber ring 51; third grooves 521 are axially arranged on the inner wall of the second rubber ring 52 at intervals, and fourth grooves 522 are axially arranged on the outer wall of the second rubber ring 52 at intervals. All set up the recess on first rubber ring 51 and the second rubber ring 52, be convenient for improve the flexibility of first rubber ring 51 and second rubber ring 52, be convenient for processing and installation.
Further, as shown in fig. 1 and 4, the outer sleeve 4 is connected with the control valve 3 through a shear pin 7; the side wall of the outer sleeve 4 is provided with a pin through hole 41 in a penetrating manner, 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, along with the rise of well temperature, the high polymer thermal energy material unit 2 (thermal sensitive agent) is heated (the heat source is injected high-temperature steam) to expand, when a certain temperature is reached, the acting force of the thermal expansion of the high polymer thermal energy material unit 2 is greater 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 steam injection valve port 31 is communicated with the agent injection pore canal 11, and steam is injected quantitatively through the steam injection valve port 31 which is set on the control valve.
Further, as shown in fig. 1 and 2, a centering block 8 is sleeved on the outer wall of the central tube 1 below the drug injection pore, and the centering block 8 can axially limit the bottom end of the control valve. The centering block 8 is used for stably centering the central tube 1, and an axial limiting part of the control valve 3 is formed, so that the safety of the construction process is guaranteed.
Further, as shown in fig. 1 and 4, the drug injection hole 11 is formed in an oblong shape, and the long axis of the oblong shape is arranged 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 provided at even intervals in the circumferential direction. The medicament injection pore canal 11 is arranged in an oblong shape, the flow cross-sectional area of liquid is large, and when 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 can be smoothly injected into the stratum.
The method of use of the fill valve structure 100 provided by the present invention is as follows:
step a, connecting an injection valve structure 100 to a pipe column and putting the pipe column into a specified position in a well;
step b, profile control construction: the profile control agent (weak gel, etc.) is injected into the stratum through the second central hole 60, the first central hole 10 and the agent injection pore canal 11; the state of the fill valve structure 100 is shown in FIG. 1;
step c, steam injection: after the profile control construction is finished, the clean water is replaced until no profile control agent remains, a pipe column does not need to be lifted out, steam is directly injected, and the steam can enter the stratum through the agent injection pore canal 11; when the well temperature rises to a certain degree, the polymer thermal energy material unit 2 (thermal sensitive agent) is heated (the heat source is injected high-temperature steam) to expand, when the temperature reaches a certain temperature, the acting force of the polymer thermal energy material unit 2 when heated and expanded 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 abutting against the righting block 8, at the moment, the steam injection valve port 31 is communicated with the agent injection pore canal 11, steam is quantitatively injected through the steam injection valve port 31 set on the control valve, and the state of the injection valve structure 100 is shown in fig. 7.
Example (b): taking a horizontal well with the inner diameter of 177.8mm and the well depth of 2126m as an example, the reservoir thickness of the horizontal well is 213.65m, the position is 1751.35-1965m, the steam injection points are determined to be 1785 m, 1865 m and 1922 m at this time, and the injection valve structure 100 of the invention is used for oil well profile control and multi-point steam injection, so that the invention is further described in detail.
Step A, firstly, according to the displacement requirement of the steam injection design, the aperture of a steam injection valve port 31 on the control valve 3 is adjusted.
And step B, closing the casing gate and the main gate (in the prior art, not shown in the figure), and connecting the pump truck with the tubing gate (in the prior art, not shown in the figure). The pressure of the construction pipeline is tested to 18MPa, and the pipeline is ensured not to be punctured and leak.
And step C, opening a main gate of the well head and an oil pipe gate (the prior art and not shown in the figure).
And D, pumping the profile control agent into the oil pipe by using a pump truck, injecting the profile control agent into the target layer through each agent injection pore canal 11, and recording the pressure of the wellhead.
And E, after the profile control agent is extruded into the stratum, replacing clear water until no profile control agent is left 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 soaking well returns to zero.
From the above, the injection valve structure and the use method thereof provided by the invention have the following beneficial effects:
the injection valve structure and the use method thereof provided by the invention can meet the requirements of medicament injection of profile control construction and steam injection of multi-point steam injection, realize that profile control construction and multi-point steam injection of an oil well are completed by one-time tubular column, and no special profile control tubular column is needed, thereby not only saving the operation cost of pulling and pulling the tubular column, effectively shortening the construction period of measures, but also greatly improving the production time rate of the oil well; the high polymer thermal energy material unit can expand to push the control valve after reaching the required temperature, so that the underground construction safety is high; the first rubber ring and the second rubber ring are both made of high-temperature-resistant sealing materials, so that the sealing performance of the injection valve structure is guaranteed, and the construction is safer and more reliable; the medicament injection pore canal is arranged in an oblong shape, the flow cross-sectional area of liquid is large, and when profile control construction is carried out, the medicament enters the stratum through the oblong medicament injection pore canal, so that the shearing action and the throttling action of the medicament can be reduced, and the medicament can be smoothly injected into the stratum.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (11)
1. The structure of the injection valve is characterized by comprising a central tube, wherein a first central hole is axially arranged in the central tube in a through mode, and a medicament injection pore channel which can be communicated with the first central hole is arranged at the lower part of the side wall of the central tube; the outer wall of the central tube is sleeved with a high-molecular thermal energy material unit above the medicament injection pore passage, and the high-molecular thermal energy material unit can be heated to expand along the axial direction of the central tube; the central pipe is sleeved with a control valve between the medicine injection pore channel and the high polymer thermal energy material unit, the control valve is provided with a steam injection valve port, the control valve can slide to the medicine injection pore channel under the expansion pushing action of the high polymer thermal energy material unit, and the steam injection valve port can be closed and can downwards slide to be communicated with the medicine injection pore channel to form a quantitative steam injection pore channel.
2. The structure of the injection valve as claimed in claim 1, wherein an outer sleeve is sleeved on the outer side of the central tube at intervals in the radial direction, a first rubber ring and a second rubber ring are sleeved in an annular space between the central tube and the outer sleeve at intervals in the axial direction, a filled annular space is formed among the central tube, the first rubber ring, the second rubber ring and the outer sleeve, the high molecular heat energy material unit is arranged in the filled annular space, and the second rubber ring and the control valve shaft are arranged in an abutting manner; the control valve can be fixedly connected with the outer sleeve and can slide along the outer sleeve under the expansion pushing action of the high polymer thermal energy material unit.
3. The structure of a filling valve according to claim 2, wherein a convex ring portion with an increased diameter is provided on the outer wall of the central tube, a first step portion and a second step portion are respectively formed at two ends of the convex ring portion, a bottom end surface of the first rubber ring can axially abut against the first step portion, and a top end surface of the second rubber ring can axially abut against the second step portion.
4. The structure of injection valves as claimed in claim 3, characterized in that the top end of the annulus between the central tube and the outer jacket tube is sealingly connected with a connection nipple, a second central hole is axially arranged through the connection nipple, and the second central hole is arranged to communicate with the first central hole; the bottom end face of the connecting short section forms an upper limit part of the first rubber ring.
5. The structure of injection valves of claim 4, wherein the inner wall of the connection nipple is threaded onto the outer wall of the central tube, and the inner wall of the outer sleeve is threaded onto the outer wall of the connection nipple.
6. The structure of a filling valve according to claim 3, wherein first grooves are axially spaced on an inner wall of the first rubber ring, and second grooves are axially spaced on an 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.
7. The fill valve structure of claim 2, wherein said outer sleeve and said control valve are connected by shear pins; link up on the lateral wall of outer tube and set up the pin via hole, set up the pin connecting hole on the outer wall of control valve, the shearing pin passes through connect in the pin connecting hole behind the pin via hole.
8. The structure of the injection valve as set forth in claim 2, wherein a centering block is fitted over the outer wall of the central tube below the medicine injection port.
9. The injection valve structure of claim 2, wherein the medicament injection orifice is oblong, and a long axis of the oblong is arranged along an axial direction of the first central tube.
10. The injection valve structure as claimed in claim 9, wherein said medicine injection port is plural in number, and said plural medicine injection ports are arranged at regular intervals in a circumferential direction.
11. A method of using a fill valve structure according to any of claims 1 to 10, comprising the steps of:
step a, connecting the injection valve structure to a pipe column and putting the pipe column into a specified position in a well;
step b, profile control construction: injecting the profile control agent into the stratum through the first central hole and the agent injection pore channel;
step c, steam injection: after the profile control construction is finished, replacing clear water until no profile control agent remains, directly injecting steam without pulling out a pipe column, and enabling the steam to enter the stratum through an agent injection pore channel; when the temperature reaches a certain temperature, the high molecular heat energy material unit pushes the control valve to slide to the medicine injection pore passage, the steam injection valve port is communicated with the medicine injection pore passage, and steam is injected quantitatively through the set steam injection valve port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010893424.0A CN114109306B (en) | 2020-08-31 | 2020-08-31 | Injection valve structure and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010893424.0A CN114109306B (en) | 2020-08-31 | 2020-08-31 | Injection valve structure and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114109306A true CN114109306A (en) | 2022-03-01 |
| CN114109306B CN114109306B (en) | 2023-11-28 |
Family
ID=80359801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010893424.0A Active CN114109306B (en) | 2020-08-31 | 2020-08-31 | Injection valve structure and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114109306B (en) |
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 | Stratified steady and constant steam filler of oil well |
| 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 injection 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 kind of steam injection ball-and-seat |
| 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 | Stratified steady and constant steam filler of oil well |
| 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 injection 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 kind of steam injection ball-and-seat |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114109306B (en) | 2023-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106761593B (en) | A kind of bad ground pretreating process | |
| CN205189848U (en) | Discodactylous that breaks end well cementation fracturing sliding sleeve | |
| CN106555574B (en) | Sand prevention and steam injection integrated device and method | |
| CN109869114A (en) | A kind of packing formula stage cementing device and its operational method | |
| MX2014000155A (en) | Cementing tool. | |
| CN108443126B (en) | Hydraulic piston pump, underground pump unit and underground liquid discharge testing system | |
| CN113863907B (en) | Carbon dioxide composite layered handling pipe column | |
| CN111980638B (en) | Temporary plugging sieve tube, well completion pipe string and running method of well completion pipe string | |
| CN114109306A (en) | Injection valve structure and using method thereof | |
| CN106321035B (en) | Full well bore is prevented returning and is told layering water injection tubular column | |
| CN210714598U (en) | Differential pressure sliding sleeve and water injection string | |
| CN204941345U (en) | A kind of radial well transfer with packing function | |
| CN105178906A (en) | Layered steam driving packer with combination effect | |
| CN115653555A (en) | Resettable separate-layer sectional pressure flooding water injection process pipe column and method | |
| CN202090848U (en) | Operating pipe column for plugging water underground | |
| CN115992652A (en) | Open hole horizontal well cement packing sectional water control sand prevention completion string and method | |
| CN211201861U (en) | Packer | |
| CN109973044B (en) | Metal sealing pair packer | |
| CN208152979U (en) | A kind of bi-directional slip formula external casing packer | |
| RU2749366C1 (en) | Hydraulic packer | |
| CN110821440B (en) | Packer | |
| CN109869112A (en) | A kind of bi-directional slip formula external casing packer | |
| CN115110929B (en) | Temporary opening type water injection ball seat and water injection pipe column | |
| CN111749642B (en) | Novel pressure control integrated upper sealing well completion tool | |
| CN115030696B (en) | Oil well production layer blocking and production linkage controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |