CN114837629B - Acidification switch type sand filtering pipe - Google Patents
Acidification switch type sand filtering pipe Download PDFInfo
- Publication number
- CN114837629B CN114837629B CN202210318425.1A CN202210318425A CN114837629B CN 114837629 B CN114837629 B CN 114837629B CN 202210318425 A CN202210318425 A CN 202210318425A CN 114837629 B CN114837629 B CN 114837629B
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- CN
- China
- Prior art keywords
- switch
- pipe
- sand filtering
- filtering pipe
- acidizable
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- 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.)
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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 an acidizable switch type sand filtering pipe, which relates to the technical field of sand prevention pipes and comprises an acidizable switch type sand filtering pipe and a special opening tool, wherein the special opening tool is inserted into the acidizable switch type sand filtering pipe, the acidizable switch type sand filtering pipe comprises two parts, namely a sand filtering pipe and a mechanical acidizing switch, the mechanical acidizing switch is arranged in the middle part of the sand filtering pipe, and the sand filtering pipe and the mechanical acidizing switch are organically combined together. According to the invention, the mechanical acidification switch is organically combined with the sand filtering pipe, so that the mechanical acidification switch is organically combined with well repair, the moment of couple generated by impact on filtration is reduced, and the acidizable switch type sand filtering pipe becomes safer; the acidizable switch sand filter pipe is a tool in a normal working state, and the special opening tool is a special opening tool of the acidizable switch sand filter pipe during well repair and can be repeatedly used, so that the process is safer and more reliable; the special opening tool of the invention lifts the lower seat to make the operation more convenient.
Description
Technical Field
The invention relates to the technical field of sand filtering pipes, in particular to an acidizable switch type sand filtering pipe.
Background
In the petroleum exploitation process, layered oil extraction is widely applied because of realizing fine management, but a large number of oil wells are in sand production at the middle and late stages because the development of petroleum is already in progress. Therefore, on the basis of layered oil extraction, a sand control function is introduced. In the sand prevention problem of the sand production well, because part of the wells have thick oil and poor liquid fluidity, a large amount of sand filtering is blocked by the oil sand, and the oil production is reduced; meanwhile, a large number of sand producing oil wells exist, and the need of reconstruction exists; the separate production process has long service life, and well repair caused by the reasons is equivalent to greatly shortening the service life of the sand control pipe. Therefore, not only is economic waste caused, but also the risk of construction is brought, and meanwhile, the production is delayed; therefore, the service life of the separate production string is fully required by using a special process.
Disclosure of Invention
The invention aims to provide an acidizable switch type sand filtering pipe so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the acidizing switch type sand filtering pipe comprises an acidizing switch type sand filtering pipe and a special opening tool, wherein the special opening tool is inserted into the acidizing switch type sand filtering pipe, the acidizing switch type sand filtering pipe comprises a sand filtering pipe and a mechanical acidizing switch, the mechanical acidizing switch is arranged in the middle of the sand filtering pipe, the sand filtering pipe and the mechanical acidizing switch are organically combined together, the sand filtering pipe mainly comprises an acidizing pipe column, a slotting screen pipe and a sealing backing ring, an upper packer I and a lower packer II which are distributed up and down are arranged between the acidizing pipe column and a sleeve, a tail pipe is arranged at the bottom end of the acidizing pipe column, and a blind plug is arranged at the bottom end of the tail pipe.
An acidizable switched sand screen as described above which is inserted into the casing of an oil well.
The acidizable switch type sand filtering pipe is characterized in that a hydraulic control switch and a signal switch are also arranged in the sand filtering pipe.
The special opening tool mainly comprises an upper joint I, a pressure bearing, a cone, slips, a slip sleeve, a slip support, a release spring, a lock ball ring, a lock ball, a release sleeve, an extension torque transmission pin, a seat long lock spring, a friction block, a reinforcing spring, a centralizer body, a friction block pressing cap, a track pin, a swivel pressing cap, a central tube and a lower joint I.
The acidification switch type sand filtering pipe is characterized in that the mechanical acidification switch mainly comprises a body, a sealing sliding sleeve, a supporting ring, a sealing rubber ring, an acidification injection hole, an upper connector II and a lower connector II.
The invention has the advantages that:
1. the invention can greatly prolong the service cycle of the pipe column, reduce the labor intensity and the operation cost and reduce the development cost;
2. the design of the large diameter (namely larger than the pipe diameter) of the sealing sliding sleeve ensures that misoperation is avoided when a special opening tool is put down, and the whole process is more reliable;
3. according to the invention, the mechanical acidification switch is organically combined with the sand filtering pipe, so that the mechanical acidification switch is organically combined with well repair, the moment of couple generated by impact on filtration is reduced, and the acidizable switch type sand filtering pipe becomes safer;
4. the acidizable switch sand filter pipe is a tool in a normal working state, and the special opening tool is a special opening tool of the acidizable switch sand filter pipe during well repair and can be repeatedly used, so that the process is safer and more reliable;
5. the special opening tool is lifted up and down, so that the operation is more convenient; the locking structure ensures that the seat length is safer; the rotation length is reduced, so that the use is smoother;
6. in the invention, the mechanical acidification switch is arranged in the middle of the sand filtering pipe, and when the stratum needs to be acidified, the mechanical acidification switch can be opened by a special opening tool to acidize;
7. the support function of the slotted screen pipe of the sand filtering pipe can facilitate acidification, and the permeability of the sand filtering pipe can be recovered due to the impact function during acidification;
8. and the special opening tool is normally taken out, and the acidizable switch type sand filtering pipe is recovered to the closed state, namely recovered to the normal working state.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic construction diagram of the present invention; FIG. 2 is a schematic diagram of the structure of an acidizable switching sand filter pipe; FIG. 3 is a schematic structural view of a special opening tool; fig. 4 is a schematic structural diagram of a mechanical acidification switch.
Reference numerals: 1. a sleeve; 2. a sand filtering pipe; 201. acidifying the tubular column; 202. cutting a slit sieve tube; 203. a seal grommet; 4. a mechanical acidification switch; 5. a packer I is arranged; 6. a lower packer I; 7. a tail pipe; 8. blind plugging; 9. a hydraulically controlled switch; 10. a signal switch; 301. an upper joint I; 302. a pressure bearing; 303. a cone; 304. a slip; 305. slip sleeve; 306. a slip support; 307. releasing the spring; 308. a ball locking ring; 309. a lock ball; 310. releasing the sleeve; 311. the torque transmission pin is disassembled and lengthened; 312. a seat long locking spring; 313. a friction block; 314. a booster spring; 315. a centralizer body; 316. pressing the cap by the friction block; 317. a rail pin; 318. a swivel; 319. rotating ring cap pressing; 320 center tube; 321. a lower joint I; 401. a body; 402. sealing the sliding sleeve; 403. a support ring; 404. sealing rubber rings; 405. acidifying the injection hole; 406. an upper joint II; 407. and a lower joint II.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-4, the acidizable switch sand filtering pipe comprises an acidizable switch sand filtering pipe and a special opening tool, the special opening tool is inserted into the acidizable switch sand filtering pipe, the acidizable switch sand filtering pipe comprises a sand filtering pipe 2 and a mechanical acidizing switch 4, the mechanical acidizing switch 4 is arranged in the middle of the sand filtering pipe 2, the sand filtering pipe 2 and the mechanical acidizing switch 4 are organically combined together, the sand filtering pipe 2 mainly comprises an acidizing pipe column 201, a slotted screen 202 and a sealing gasket 203, an upper packer I5 and a lower packer II6 which are distributed up and down are arranged between the acidizing pipe column 201 and a sleeve 1, a tail pipe 7 is arranged at the bottom end of the acidizing pipe column 201, and a blind plug 8 is arranged at the bottom end of the tail pipe 7.
When the stratum needs to be reformed, the mechanical acidification switch 4 is opened by using a special opening tool, and acidification is carried out, and the specific operation is as follows: when the special opening tool is put into a proper position, the slips 304 of the special opening tool are clamped in the sealing sliding sleeve 402 of the mechanical acidification switch 4 by lifting and lowering, and the acidification injection hole 405 on the body 401 of the mechanical acidification switch 4 is forcibly lowered to open, after the acidification injection hole 405 is opened, the acidification can be pressed into the acidification pipe column 201, and when the pressure reaches the design requirement, the upper packer I5 and the lower packer II6 are simultaneously set; stopping pressing after acidification is completed, closing the mechanical acidification switch 4 after the pressure returns to zero, simultaneously automatically unsealing the upper packer I5 and the lower packer II6 when the pressure is smaller than the design requirement, lifting the acidification pipe column 201 to reset the sealing sliding sleeve 402 of the mechanical acidification switch 4 after the upper packer I5 and the lower packer II6 are unsealed, and simultaneously rotating the acidification pipe column 201 to ensure that the seat long lock spring 312 locks the descending of the centralizer body 315, and ensuring that the long tile 24 is unsealed under the action of the elasticity of the release spring 27 to smoothly lift the acidification pipe column 201; when the acidification is completed, the pump is again lowered into the casing 1 and production is resumed again.
Specifically, the acidizable switching sand filter pipe according to the present embodiment is inserted into the casing 1 of an oil well.
Specifically, the sand filtering pipe 2 in this embodiment is also provided with a hydraulic control switch 9 and a signal switch 10.
Further, the special opening tool in this embodiment mainly comprises an upper joint I301, a pressure bearing 302, a cone 303, a slip 304, a slip sleeve 305, a slip holder 306, a release spring 307, a lock ball ring 308, a lock ball 309, a release sleeve 310, an extension torque transmission pin 311, a seat length lock spring 312, a friction block 313, a booster spring 314, a centralizer body 315, a friction block press cap 316, a track pin 317, a swivel 318, a swivel press cap 319, a center tube 320, and a lower joint I321.
Further, the mechanical acidification switch 4 in this embodiment mainly comprises a body 401, a sealing sliding sleeve 402, a supporting ring 403, a sealing rubber ring 404, an acidification injection hole 405, an upper connector II406 and a lower connector II 407.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. An acidulatable switch type sand filtering pipe is characterized in that: the acidizable switching sand filtering pipe comprises an acidizable switching sand filtering pipe and a special opening tool, wherein the special opening tool mainly comprises an upper joint I (301), a pressure bearing (302), a cone (303), a slip (304), a slip sleeve (305), a slip support (306), a release spring (307), a lock ball ring (308), a lock ball (309), a release sleeve (310), an extension torque transmission pin (311), a seat long lock spring (312), a friction block (313), a booster spring (314), a centralizer body (315), a friction block pressing cap (316), a track pin (317), a swivel (318), a swivel pressing cap (319), a central pipe (320) and a lower joint I (321), the special opening tool is inserted into the acidizable switching sand filtering pipe, the acidizable switching sand filtering pipe comprises two parts of a sand filtering pipe (2) and a mechanical acidizing switch (4), the mechanical acidizing switch (4) mainly comprises a body (401), a sealing sleeve (402), a supporting ring (403), a sealing rubber ring (404), an acidizing (405), an upper joint II (406) and a lower joint II (407) which are combined with the mechanical acidizing switch (4) in the middle part of the sand filtering pipe (2), the sand filtering pipe (2) mainly comprises an acidification pipe column (201), a slotted screen pipe (202) and a sealing gasket ring (203), an upper packer I (5) and a lower packer II (6) which are distributed up and down are arranged between the acidification pipe column (201) and the casing pipe (1), a tail pipe (7) is arranged at the bottom end of the acidification pipe column (201), and a blind plug (8) is arranged at the bottom end of the tail pipe (7).
2. The acidizable switched mode sand filter tube of claim 1 wherein: the acidizable switch sand filtering pipe is inserted into a sleeve (1) of an oil well.
3. The acidizable switched mode sand filter tube of claim 1 wherein: the sand filtering pipe (2) is internally provided with a hydraulic control switch (9) and a signal switch (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210318425.1A CN114837629B (en) | 2022-03-29 | 2022-03-29 | Acidification switch type sand filtering pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210318425.1A CN114837629B (en) | 2022-03-29 | 2022-03-29 | Acidification switch type sand filtering pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114837629A CN114837629A (en) | 2022-08-02 |
| CN114837629B true CN114837629B (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210318425.1A Active CN114837629B (en) | 2022-03-29 | 2022-03-29 | Acidification switch type sand filtering pipe |
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| Country | Link |
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| CN (1) | CN114837629B (en) |
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| US6655461B2 (en) * | 2001-04-18 | 2003-12-02 | Schlumberger Technology Corporation | Straddle packer tool and method for well treating having valving and fluid bypass system |
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| CN202510042U (en) * | 2012-01-31 | 2012-10-31 | 中国石油化工股份有限公司 | Layering acidification tubular column in sand prevention tube in water injection well of oil field |
| CN110107251A (en) * | 2019-04-30 | 2019-08-09 | 中国海洋石油集团有限公司 | A kind of frac-pack crossover tool |
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| Publication number | Publication date |
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| CN114837629A (en) | 2022-08-02 |
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