CN114233249B

CN114233249B - Pressure-resistant sieve tube for high-temperature oil well operation

Info

Publication number: CN114233249B
Application number: CN202210162278.3A
Authority: CN
Inventors: 王博文; 王中华; 相文明; 朱小娟; 李同芳
Original assignee: Shandong Zhaoxin Oil Tools Co ltd
Current assignee: Dongying Zhaoxin Industry And Trade Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-04-29
Anticipated expiration: 2042-02-22
Also published as: CN114233249A

Abstract

The invention discloses a pressure-resistant sieve tube for high-temperature oil well operation, and relates to the technical field of oilfield exploitation equipment. The invention comprises a locking slide pipe, a supporting pipe, a middle filter pipe and a filter screen wall; the supporting pipe and the locking sliding pipe are nested in a sliding mode, the middle filtering pipe and the supporting pipe are nested in a fixed mode to form a sieve pipe group together, and a packing rubber pipe is arranged between the two sieve pipe groups. According to the invention, the supporting tubes, the middle filter tube and the filter wall are arranged to form a plurality of screen tube groups, and the screen tube groups are connected by the packing rubber tubes, so that the working sections of the screen tube groups can be packed, the pressure of an oil well on the screen tube is dispersed, and meanwhile, leaked oil slides down along the middle filter tube and the supporting tubes, thereby avoiding direct contact with the filter wall and influencing the heating balance; on the other hand, through setting up the sieve and straining wall and locking the slide pipe, utilize the locking slide pipe to support the pressure boost in the sliding sleeve, utilize atmospheric pressure to strain the wall ejecting and expansion with the sieve, the sieve of being convenient for strains wall and the direct laminating of oil outlet channel, avoids appearing fluid and saves, exerts pressure to the screen pipe group.

Description

Pressure-resistant sieve tube for high-temperature oil well operation

Technical Field

The invention belongs to the technical field of oilfield exploitation equipment, and particularly relates to a pressure-resistant sieve tube for high-temperature oil well operation.

Background

The petroleum sieve tube is a common working component in petroleum exploitation work and mainly has the main function of preventing a large amount of mud and sand from being brought in when oil permeates into a pipeline from an oil field or an oil well to influence the petroleum exploitation efficiency; the types of the petroleum screen pipes are various, and the petroleum screen pipes are usually connected to the working depth by external force; in the process, the oil outlet channel is pre-arranged, and after the sieve tube is continuously inserted, the outer wall of the sieve tube is often difficult to be attached to the inner wall of the channel, so that a gap is generated, oil is easy to accumulate in the oil extraction process, the wall of the sieve tube is pressed, the sieve tube is damaged, and the oil outlet rate and the sand screening rate are influenced; in addition, the design length of the sieve tube is long, and in actual operation, although the oil recovery rate is high, because the internal temperature of the oil well is high, the oil solution seeped out first continues to seep, so that the sieve tube is easily heated unevenly, and meanwhile, the oil pressure is in an unbalanced state; therefore, in order to solve the above problems, we have designed a pressure resistant screen for high temperature well operations.

Disclosure of Invention

The invention aims to provide a pressure-resistant sieve tube for high-temperature oil well operation, which solves the problems that the existing sieve tube is difficult to be attached to an oil outlet channel and is easy to be heated unevenly under a high-temperature working environment, so that a tube group is damaged, and the oil outlet rate and the sand sieving rate are influenced.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a pressure-resistant sieve tube for high-temperature oil well work, which comprises a locking sliding tube, a supporting tube, a middle filter tube and a sieve filter wall, wherein the locking sliding tube, the supporting tube and the middle filter tube are sequentially arranged from inside to outside, the supporting tube is nested with the locking sliding tube in a sliding manner, and the middle filter tube is nested with the supporting tube in a fixed manner; the screen walls are hinged end to form a screen wall structure and are nested outside the middle filter pipe, the opposite ends of the middle filter pipe are adhered with packing rubber pipes, the opposite ends of the supporting pipe extend into the packing rubber pipes and are adhered with the packing rubber pipes to form a sealing structure; the supporting tube, the middle filter tube and the filter wall form a sieve tube group, and the sieve tube groups are mutually adhered and fixed through packing rubber tubes;

when the sieve tube device is used, a plurality of sieve tube groups are required to be assembled with each other according to the designed depth and then extend to a working position; when the screen pipe works, the packing rubber pipes are compressed and expanded, then the working sections of the screen pipe groups are packed, and the pressure of an oil well on the screen pipes is dispersed;

a gap is formed between the middle filter pipe and the support pipe, and a plurality of support sliding sleeves are welded between the middle filter pipe and the support pipe; the inner side surface of the screen filtering wall is welded with a sliding rod plug, the sliding rod plug extends into the supporting sliding sleeve through the middle filter pipe, and the sliding rod plug and the supporting sliding sleeve form a piston structure;

the screen wall comprises a plurality of screen rods and a plurality of screen plates, and the screen rods and the screen plates are mutually staggered and welded into an arc-shaped grid structure;

the locking sliding pipe is in sliding fit with the inner wall of the supporting pipe, a plurality of pressurizing air holes are formed in the pipe wall of the locking sliding pipe, and the pressurizing air holes are communicated with the supporting sliding sleeve;

in actual work, firstly, the locking sliding pipe is used for inflating the inside of the sieve pipe group, when the packing rubber pipe is expanded by air pressure, the locking sliding pipe injects air into the inside of the supporting sliding sleeve through the pressurizing air hole, and the air pressure is used for pushing the sliding rod plug and the sieve filter wall to extend outwards, so that the outer side of the sieve filter wall is tightly attached to the inner wall of the oil outlet channel, the outer wall of the sieve pipe group and the inner wall of the oil outlet channel are prevented from generating gaps, and the pressure of oil on the pipe wall of the sieve pipe group is increased.

Furthermore, two limiting plates are welded on the peripheral side of the middle filter pipe, and the limiting plates are arranged between the middle filter pipe and the packing rubber pipe; a plurality of limiting sliding grooves are formed in one side surface of the packing rubber pipe; two opposite side surfaces of the screening walls are hinged with connecting hinge plates, the connecting hinge plates between two adjacent screening walls are hinged with each other, and the hinge shaft extends into the limiting sliding groove and is in sliding fit with the limiting sliding groove; the arrangement of the connecting hinge plate can ensure that the screen filter wall keeps the continuous state of the outer wall of the screen pipe group after being pressed and unfolded, and the oil yield and the working efficiency are ensured.

Furthermore, a plurality of middle filter holes are formed in the inner wall of the middle filter pipe, and the aperture of each middle filter hole is smaller than the aperture of a mesh of the filter wall; the meshes of the screening wall and the middle filtering holes can carry out dual screening on oil entering the screen pipe group, so that the sand prevention capability is improved.

Furthermore, expansion air holes are formed in the pipe wall of the supporting pipe of the packing rubber pipe section, and the pressurization air holes are communicated with the packing rubber pipe through the expansion air holes.

The invention has the following beneficial effects:

according to the invention, the supporting tubes, the middle filter tube and the filter wall are arranged to form a plurality of screen tube groups, and the screen tube groups are connected by the packing rubber tubes, so that the working sections of the screen tube groups can be packed, the pressure of an oil well on the screen tube is dispersed, and meanwhile, leaked oil slides down along the middle filter tube and the supporting tubes, thereby avoiding direct contact with the filter wall and influencing the heating balance; on the other hand, by arranging the screening wall and the locking sliding pipe, the locking sliding pipe is utilized to pressurize the inside of the support sliding sleeve, and the screening wall is ejected and unfolded by utilizing air pressure, so that the screening wall is directly attached to an oil outlet channel, oil accumulation is avoided, and pressure is applied to the screen pipe group; in addition, the screening wall structure supported by air pressure can buffer to a certain extent after being impacted by oil pressure, so that the structure of the screen pipe group is further protected.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a view of the assembled structure of a pressure-resistant screen unit for high temperature oil well operation according to the present invention;

FIG. 2 is a front view of a pressure resistant screen for high temperature well operations in accordance with the present invention;

FIG. 3 is a schematic structural view of section A-A in FIG. 2;

FIG. 4 is a partial display view of portion B of FIG. 3;

FIG. 5 is a schematic structural view of section C-C of FIG. 3;

fig. 6 is a partial view of portion D of fig. 5.

In the drawings, the components represented by the respective reference numerals are listed below:

1. locking the sliding pipe; 2. supporting a tube; 3. a middle filter tube; 4. a screen wall; 201. supporting the sliding sleeve; 401. a plunger; 402. a screen bar; 403. a sieve plate; 101. pressurizing the air hole; 301. sealing the rubber tube; 302. a limiting plate; 3021. a limiting chute; 404. connecting a hinge plate; 303. and (4) filtering the pores.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-6, the invention is a pressure-resistant sieve tube for high-temperature oil well operation, comprising a locking slide tube 1, a support tube 2, a middle filter tube 3 and a sieve filter wall 4, wherein the locking slide tube 1, the support tube 2 and the middle filter tube 3 are sequentially arranged from inside to outside, the support tube 2 is slidably nested with the locking slide tube 1, and the middle filter tube 3 is fixedly nested with the support tube 2; the screening walls 4 are hinged end to form a screen pipe wall structure and are nested outside the middle filtering pipe 3, the opposite ends of the middle filtering pipe 3 are adhered with packing rubber pipes 301, the opposite ends of the supporting pipe 2 extend into the packing rubber pipes 301 and are adhered with the packing rubber pipes 301 to form a sealing structure; the supporting tube 2, the middle filter tube 3 and the filter wall 4 form a sieve tube group, and a plurality of sieve tube groups are mutually adhered and fixed through packing rubber tubes 301;

when the sieve tube device is used, a plurality of sieve tube groups are required to be assembled with each other according to the designed depth and then extend to a working position; when the packer rubber pipe 301 works, the packer rubber pipe 301 is pressed and expanded to pack the working sections of the sieve pipe groups, and the pressure of an oil well on the sieve pipes is dispersed.

Example 2:

a gap is formed between the middle filter pipe 3 and the support pipe 2, and a plurality of support sliding sleeves 201 are welded between the middle filter pipe 3 and the support pipe; a sliding rod plug 401 is welded on the inner side surface of the filtering wall 4, the sliding rod plug 401 extends into the supporting sliding sleeve 201 through the middle filtering pipe 3, and the sliding rod plug 401 and the supporting sliding sleeve 201 form a piston structure;

the screen wall 4 comprises a plurality of screen rods 402 and a plurality of screen plates 403, and the screen rods 402 and the screen plates 403 are mutually staggered and welded into an arc-shaped grid structure;

the locking sliding pipe 1 is in sliding fit with the inner wall of the supporting pipe 2, a plurality of pressurizing air holes 101 are formed in the pipe wall of the locking sliding pipe 1, and the pressurizing air holes 101 are communicated with the supporting sliding sleeve 201;

in actual work, firstly, the locking sliding pipe 1 is used for inflating the inside of the sieve pipe group, when the packing rubber pipe 301 is expanded by air pressure, the locking sliding pipe 1 injects air into the inside of the supporting sliding sleeve 201 through the pressurizing air hole 101, and pushes the sliding rod plug 401 and the sieve filter wall 4 to extend outwards by the air pressure, so that the outer side of the sieve filter wall 4 is tightly attached to the inner wall of the oil outlet channel, gaps between the outer wall of the sieve pipe group and the inner wall of the oil outlet channel are avoided, and the pressure of oil on the pipe wall of the sieve pipe group is increased.

Example 3:

two limiting plates 302 are welded on the circumferential side surface of the middle filter pipe 3, and the limiting plates 302 are arranged between the middle filter pipe 3 and the packing rubber pipe 301; a plurality of limiting sliding chutes 3021 are formed in one side surface of the packing rubber pipe 301; the two opposite side surfaces of the filtering walls 4 are hinged with connecting hinge plates 404, the connecting hinge plates 404 between two adjacent filtering walls 4 are hinged with each other, and the hinge shaft extends into the limiting sliding chute 3021 and is in sliding fit with the limiting sliding chute 3021; the hinge plates 404 are arranged to keep the screen walls 4 in a continuous state after being expanded under pressure, thereby ensuring the oil yield and the working efficiency.

Preferably, a plurality of middle filtering holes 303 are formed in the inner wall of the middle filtering pipe 3, and the aperture of the middle filtering holes 303 is smaller than the aperture of the meshes of the filtering wall 4; the meshes of the screening wall 4 and the middle filtering holes 303 can carry out double screening on oil entering the screening pipe group, thereby improving the sand control capability.

Preferably, an expansion air hole is formed in the pipe wall of the supporting pipe 2 of the section of the packing rubber pipe 301, and the pressurization air hole 101 is communicated with the packing rubber pipe 301 through the expansion air hole.

It should be further noted that, because the oil well or oil field is a one-way open cavity relative to the ground, when the locking slide pipe 1 is used to pressurize the inside, the air pressure generally acts directly on the screen wall 4 and the packing rubber pipe 301, which is more convenient for the screen pipe set to attach to the oil outlet channel.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure-resistant screen pipe for high-temperature oil well operation comprises a locking slide pipe (1), a support pipe (2), a middle filter pipe (3) and a screen wall (4), and is characterized in that: the locking sliding pipe (1), the supporting pipe (2) and the middle filter pipe (3) are sequentially arranged from inside to outside, the supporting pipe (2) is nested with the locking sliding pipe (1) in a sliding mode, and the middle filter pipe (3) is nested with the supporting pipe (2) in a fixed mode; the screen walls (4) are hinged end to form a screen wall structure and are nested outside the middle filter pipe (3);

a gap is formed between the middle filter pipe (3) and the support pipe (2), and a plurality of support sliding sleeves (201) are welded between the middle filter pipe and the support pipe; a sliding rod plug (401) is welded on the inner side surface of the screening wall (4), the sliding rod plug (401) extends into the supporting sliding sleeve (201) through the middle filtering pipe (3), and the sliding rod plug (401) and the supporting sliding sleeve (201) form a piston structure;

the screening wall (4) comprises a plurality of screening rods (402) and a plurality of screening plates (403), and the screening rods (402) and the screening plates (403) are mutually staggered and welded into an arc-shaped grid structure;

the locking sliding pipe (1) is in sliding fit with the inner wall of the supporting pipe (2), a plurality of pressurizing air holes (101) are formed in the pipe wall of the locking sliding pipe (1), and the pressurizing air holes (101) are communicated with the supporting sliding sleeve (201);

the opposite ends of the middle filter pipe (3) are both adhered with packing rubber pipes (301), and the opposite ends of the support pipe (2) extend into the packing rubber pipes (301) and are adhered with the packing rubber pipes (301) to form a sealing structure;

two limiting plates (302) are welded on the peripheral side surface of the middle filter pipe (3), and the limiting plates (302) are arranged between the middle filter pipe (3) and the packing rubber pipe (301); a plurality of limiting sliding chutes (3021) are formed in one side surface of the packing rubber pipe (301);

the two opposite side surfaces of the screening walls (4) are hinged with connecting hinge plates (404), the connecting hinge plates (404) between the two adjacent screening walls (4) are hinged with each other, and the hinge shaft extends into the limiting sliding groove (3021) and is in sliding fit with the limiting sliding groove (3021).

2. The screen pipe of claim 1, wherein the inner part of the middle filtering pipe (3) is provided with a plurality of middle filtering holes (303), and the hole diameter of the middle filtering holes (303) is smaller than the mesh hole diameter of the screen wall (4).

3. The screen pipe of claim 2, wherein the support pipes (2), the middle filter pipe (3) and the screen wall (4) form screen pipe groups, and the screen pipe groups are fixed by the packing rubber pipes (301) in an adhesion manner.

4. The pressure-resistant screen pipe for high-temperature oil well operation as claimed in claim 3, wherein the packing rubber pipe (301) section is provided with expansion air holes inside the pipe wall of the supporting pipe (2), and the pressurization air holes (101) are communicated with the packing rubber pipe (301) through the expansion air holes.