CN114837629A

CN114837629A - Acidifiable switch type sand filtering pipe

Info

Publication number: CN114837629A
Application number: CN202210318425.1A
Authority: CN
Inventors: 郝爱国; 郝晨旭; 郝晨冉; 王凯; 郝晨曦; 李晓旭; 张朋朋
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-08-02
Anticipated expiration: 2042-03-29
Also published as: CN114837629B

Abstract

The invention discloses an acidifiable switch type sand filtering pipe, which relates to the technical field of sand control pipes and comprises an acidifiable switch type sand filtering pipe and a special opening tool, wherein the special opening tool is inserted into the acidifiable switch type sand filtering pipe, the acidifiable switch type sand filtering pipe comprises a sand filtering pipe and a mechanical acidification switch, the mechanical acidification switch is arranged in the middle of the sand filtering pipe, and the sand filtering pipe and the mechanical acidification switch are organically combined together. The mechanical acidizing switch and the sand filter pipe are organically combined together, so that the use and well repair are organically combined, the couple moment generated by impact on filtration is reduced, and the acidizing switch type sand filter pipe is safer; the acidizable switch type sand filtering pipe is a tool in a normal working state, and the special opening tool is a professional opening tool of the acidizable switch type sand filtering pipe during well workover and can be used repeatedly, so that the process is safer and more reliable; the special opening tool in the invention adopts a seat length mode of lifting and lowering, so that the operation is more convenient.

Description

Acidifiable switch type sand filtering pipe

Technical Field

The invention relates to the technical field of sand filtering pipes, in particular to an acidifiable switch type sand filtering pipe.

Background

In the process of oil exploitation, layered oil recovery is widely applied because fine management can be realized, but now, because the development of oil reaches the middle and later stages, a large number of oil wells produce sand. Therefore, the sand control function is introduced on the basis of the layered oil recovery. In the sand prevention problem of the sand production well, as part of wells have thick oil and poor liquid fluidity, a large amount of sand filtration is blocked by oil sand, so that the phenomenon of oil recovery reduction is caused; meanwhile, a large number of sand producing oil wells are needed to be reconstructed; it is known that the period of use of the separate production process is long, and the well repair due to the above reasons is equivalent to greatly shortening the service life of the sand control pipe. Therefore, not only is economic waste caused, but also the construction risk is brought, and meanwhile, the production is delayed; therefore, it is necessary to extend the service life of the production string by using a special process.

Disclosure of Invention

The invention aims to provide an acidifiable switch type sand screen to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

but acidizing switch formula sand screen, including acidizing switch formula sand screen and special opening tool, special opening tool inserts to in the acidizing switch formula sand screen, but acidizing switch formula sand screen includes sand screen and mechanical type acidizing switch two parts, mechanical type acidizing switch installs at the intraductal middle part of sand screen, and sand screen and mechanical type acidizing switch organically combine together, the sand screen mainly comprises acidizing tubular column, slot screen pipe and sealing backing ring, install upper packer I and lower packer II that distribute from top to bottom between acidizing tubular column and the sleeve pipe, the tail pipe is installed to acidizing tubular column bottom, blind plug is installed to the tail pipe bottom.

The acidizable switch type sand filtering pipe is inserted into the casing of the oil well

The acidizable switch type sand filtering pipe is characterized in that a hydraulic control switch and a signal switch are further installed in the sand filtering pipe.

The acidizable switch type sand filter pipe mainly comprises an upper joint I, a pressure bearing, a cone, a slip sleeve, a slip holder, a release spring, a ball locking ring, a locking ball, a release sleeve, a release transmission torque pin, a seat length locking spring, a friction block, a boosting spring, an interaction device body, a friction block pressing cap, a track pin, a swivel pressing cap, a central pipe and a lower joint I.

The acidizing switch type sand filtering pipe mainly comprises a body, a sealing sliding sleeve, a supporting ring, a sealing rubber ring, an acidizing 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 drift diameter (namely, the drift diameter is larger than the pipe diameter) of the sealing sliding sleeve ensures that the misoperation cannot be caused when a special opening tool is put down, so that the whole process is more reliable;

3. the mechanical acidizing switch and the sand filter pipe are organically combined together, so that the use and well repair are organically combined, the couple moment generated by impact on filtration is reduced, and the acidizing switch type sand filter pipe is safer;

4. the acidizable switch type sand filtering pipe is a tool in a normal working state, and the special opening tool is a professional opening tool of the acidizable switch type sand filtering pipe during well workover and can be used repeatedly, so that the process is safer and more reliable;

5. the special opening tool in the invention lifts and lowers the seat length, so that the operation is more convenient; the locking structure ensures that the seat is longer and safer; the rotation is used for lengthening, so that the use is smoother;

6. the mechanical acidification switch is arranged in the middle of the sand filter pipe, and when the stratum needs to be acidified, the mechanical acidification switch can be turned on by using a special turning-on tool to acidify the stratum;

7. the acidification is easy due to the supporting function of the slotted screen pipe of the sand filter pipe, and the permeability of the sand filter pipe is recovered due to the impact effect during acidification;

8. normally take out special opening tool, acidifiable switch formula sand screen has just recovered the off-state, resumes normal operating condition promptly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a schematic view of the construction structure of the present invention; FIG. 2 is a schematic diagram of the construction of an acidizable sand screen of the on-off type; FIG. 3 is a schematic structural view of a dedicated opening tool; fig. 4 is a schematic structural diagram of a mechanical acidification switch.

Reference numerals: 1. a sleeve; 2. a sand screen pipe; 201. acidifying the tubular column; 202. slotting a sieve tube; 203. a sealing gasket ring; 4. a mechanical acidification switch; 5. an upper packer I; 6. a lower packer I; 7. a tail pipe; 8. Blind plugging; 9. a hydraulic control switch; 10. a signal switch; 301. an upper joint I; 302. a pressure bearing; 303. a cone; 304. slips; 305. a slip sleeve; 306. a slip holder; 307. releasing the spring; 308. a ball locking ring; 309. locking the ball; 310. releasing the sleeve; 311. the length transmission torque pin is released; 312. a seat length lock spring; 313. a friction block; 314. a force-increasing spring; 315. a mutual stabilizer body; 316. pressing a cap by a friction block; 317. a rail pin; 318. rotating the ring; 319. rotating the ring to press the cap; 320 a central tube; 321. a lower joint I; 401. a body; 402. Sealing the sliding sleeve; 403. a support ring; 404. sealing the rubber ring; 405. acidifying the injection hole; 406. an upper joint II; 407. and a lower joint II.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-4, the acidizable switch type sand screen comprises an acidizable switch type sand screen and a special opening tool, the special opening tool is inserted into the acidizable switch type sand screen 2, the acidizable switch type sand screen comprises two parts, namely a sand screen 2 and a mechanical acidizing switch 3, the mechanical acidizing switch 4 is installed in the middle of the sand screen 2, the sand screen 2 and the mechanical acidizing switch 4 are organically combined together, the sand screen 2 mainly comprises an acidizing pipe column 201, a slotted screen 202 and a sealing gasket ring 203, an upper packer I5 and a lower packer II6 which are distributed up and down are installed between the acidizing pipe column 201 and a casing 1, a tail pipe 7 is installed at the bottom end of the acidizing pipe column 201, and a blind plug 8 is installed at the bottom end of the tail pipe 7.

When the stratum needs to be reformed transform, utilize special opening tool to open mechanical type acidizing switch 4, and carry out the acidizing, the concrete operation is as follows: when the special opening tool is lowered to 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, the mechanical acidification switch 4 is forcibly lowered to open the acidification injection hole 405 on the body 401 of the mechanical acidification switch 4, the acidification pipe column 201 can be pressed and acidified after the acidification injection hole 405 is opened, and when the pressure reaches the design requirement, the upper packer I5 and the lower packer II6 are simultaneously sealed; after acidizing is finished, stopping pressurizing, after pressure returns to zero, closing the mechanical acidizing switch 4, simultaneously when the pressure is smaller than the design requirement, automatically unsetting the upper packer I5 and the lower packer II6, after the upper packer I5 and the lower packer II6 are unsetted, lifting the acidizing string 201 up to reset the sealing sliding sleeve 402 of the mechanical acidizing switch 4, simultaneously, rotating the acidizing string 201 to enable the seat length locking spring 312 to lock the downward movement of the centralizer body 315, enabling the long tiles 24 to be unsewn under the action of the elastic force of the release spring 27, and smoothly lifting the acidizing string 201 out; when the acidification is completed, the pump is lowered again into the casing 1 and production is resumed again.

Specifically, the acidizable switch-type sand screen according to the present embodiment is inserted into the casing 1 of the well.

Specifically, the sand screen 2 according to this embodiment further includes a hydraulic control switch 9 and a signal switch 10.

Further, the special opening tool according to the present embodiment mainly comprises an upper joint I301, a pressure bearing 302, a cone 303, slips 304, a slip sleeve 305, a slip retainer 306, a release spring 307, a ball locking ring 308, a ball locking 309, a release sleeve 310, a release torque transmission pin 311, a long seat locking spring 312, a friction block 313, a power spring 314, an centralizer body 315, a friction block pressing cap 316, a track pin 317, a swivel 318, a swivel pressing cap 319, a central tube 320 and a lower joint I321.

Further, the mechanical acidification switch 4 of the present embodiment mainly comprises a body 401, a sealing sliding sleeve 402, a support ring 403, a sealing rubber ring 404, an acidification injection hole 405, an upper joint II406 and a lower joint II 407.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. Acidify on-off sand screen, its characterized in that: the acidizable sand filtering pipe comprises an acidizable switch type sand filtering pipe body and a special opening tool, the special opening tool is inserted into the acidizable switch type sand filtering pipe body (2), the acidizable switch type sand filtering pipe body comprises a sand filtering pipe body (2) and a mechanical acidizing switch body (3), the mechanical acidizing switch body (4) is installed in the middle of the sand filtering pipe body (2), the sand filtering pipe body (2) and the mechanical acidizing switch body (4) are organically combined together, the sand filtering pipe body (2) mainly comprises an acidizing pipe column (201), a slotted sieve pipe (202) and a sealing cushion ring (203), an upper packer I (5) and a lower packer II (6) which are distributed up and down are installed between the acidizing pipe column (201) and a casing pipe (1), a tail pipe (7) is installed at the bottom end of the acidizing pipe column (201), and a blind plug (8) is installed at the bottom end of the tail pipe (7).

2. The acidizable switch-on sand screen of claim 1, wherein: the acidifiable switch type sand screen is inserted into a casing (1) of an oil well.

3. The acidizable switch-on sand screen of claim 1, wherein: and a hydraulic control switch (9) and a signal switch (10) are also arranged in the sand filtering pipe (2).

4. The acidizable switch-on sand screen of claim 1, wherein: the special opening tool mainly comprises an upper joint I (301), a pressure bearing (302), a cone (303), slips (304), a slip sleeve (305), a slip support (306), a release spring (307), a ball locking ring (308), a ball locking (309), a release sleeve (310), a length-releasing torque transmission pin (311), a seat length locking spring (312), a friction block (313), a reinforcement spring (314), an interaction device 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).

5. The acidizable switch-on sand screen of claim 1, wherein: the mechanical acidification switch (4) mainly comprises a body (401), a sealing sliding sleeve (402), a support ring (403), a sealing rubber ring (404), an acidification injection hole (405), an upper joint II (406) and a lower joint II (407).