CN114233249B - A pressure-resistant screen tube for high temperature oil well work - Google Patents

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

A pressure-resistant screen tube for high temperature oil well work

technical field

The invention belongs to the technical field of oilfield exploitation equipment, in particular to a pressure-resistant screen pipe used for high temperature oil well work.

Background technique

The oil screen is a common working component in the oil exploration work. Its main function is to prevent the oil from infiltrating into the pipeline from the oil field or oil well and bring in a large amount of mud and sand, which affects the efficiency of oil production. There are many types of oil screens. Usually, external force is required to continue it to the working depth; in this process, since the oil outlet channel is pre-opened, after the screen tube is continued, the outer wall of the screen tube is often difficult to fit the inner wall of the channel, resulting in gaps. In the process of oil production, it is easy to accumulate oil, press the wall of the screen tube, cause damage to the screen tube, and affect the oil production rate and the screen sand rate. In addition, the design length of the screen tube is usually long. In actual work, although the oil recovery rate is high However, due to the high internal temperature of the oil well, the oil that seeped out first continues to seep down, which is likely to cause uneven heating of the screen and an unbalanced oil pressure. Therefore, in order to solve the above problems, we designed a A pressure-resistant screen for high temperature oil well work.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pressure-resistant screen tube for high-temperature oil well work, which solves the problem that the existing screen tube is difficult to fit into the oil outlet channel and is easily heated unevenly in a high-temperature working environment, thereby causing damage to the tube group. The problem of oil rate and sand screen rate.

In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical solutions:

The present invention is a pressure-resistant screen tube for high temperature oil well operation, comprising a locking slide tube, a support tube, a middle filter tube and a screen filter wall, the locking slide tube, the support tube and the middle filter tube are arranged in order from inside to outside Arrangement, and the support pipe and the locking slide pipe are slidably nested, and the middle filter pipe and the support pipe are fixedly nested; a plurality of the screen filter walls are hinged with each other to form a screen pipe wall structure, which is nested outside the middle filter pipe, and the The two opposite ends of the middle filter tube are adhered with a sealing rubber tube, and the opposite ends of the supporting tube are extended to the inside of the sealing rubber tube, and are bonded with the sealing rubber tube to form a sealing structure; the supporting tube, the middle filter tube and the screen filter wall constitute a screen Tube groups, several screen tube groups are adhered and fixed to each other through sealing rubber pipes;

When using the screen tube device of the present invention, several screen tube groups need to be assembled with each other according to the design depth and then extended to the working position; during operation, the sealing rubber tube is compressed and expanded to seal off the working section of each screen tube group. Disperse the pressure of the well on the screen;

There is a gap between the middle filter tube and the support tube, and a number of support sliding sleeves are welded between the two; a sliding rod plug is welded on the inner side of the screen filter wall, and the sliding rod plug extends through the middle filter tube to the supporting sliding sleeve. inside, and the sliding rod plug and the supporting sliding sleeve form a piston structure;

The sieve filter wall includes a plurality of sieve bars and a plurality of sieve plates, and the sieve bars and the sieve plates are alternately welded to form an arc-shaped grid structure;

The locking slide pipe is slidably fitted with the inner wall of the support tube, and a plurality of pressurized air holes are opened inside the pipe wall of the locking slide pipe, and the pressurized air holes and the support slide sleeve are communicated with each other;

In actual work, firstly use the locking slide pipe to inflate the inside of the screen tube group, and at the same time use the air pressure to expand the packing rubber tube, the locking slide tube injects air from the pressurized air hole into the support slide sleeve, and uses the air pressure to push the slide rod plug and The screen wall stretches outward, so that the outside of the screen wall is close to the inner wall of the oil outlet channel, so as to avoid the gap between the outer wall of the screen tube group and the inner wall of the oil outlet channel, thereby increasing the pressure of the oil on the tube wall of the screen tube group.

Further, two limit plates are welded on the peripheral side of the middle filter tube, and the limit plates are arranged between the middle filter tube and the sealing rubber tube; a number of limit chutes are opened on one side of the sealing rubber tube; The screen walls are hinged with connecting hinge plates on opposite sides, the connecting hinge plates between two adjacent screen walls are hinged with each other, and the hinge shaft extends into the limit chute and slides with the limit chute. ;The setting of the connecting hinge plate can make the screen wall keep the continuous state of the outer wall of the screen tube group after being unfolded under pressure, so as to ensure the oil output rate and work efficiency.

Further, a number of middle filter holes are opened inside the tube wall of the middle filter tube, and the aperture of the middle filter hole is smaller than the mesh aperture of the screen filter wall; The liquid is double screened to improve the sand control ability.

Further, an expansion air hole is opened inside the pipe wall of the support pipe of the sealing rubber pipe section, and the pressurized air hole is communicated with the sealing rubber pipe through the expansion air hole.

The present invention has the following beneficial effects:

In the present invention, a plurality of screen tube groups are formed by arranging a support pipe, a middle filter pipe and a screen filter wall, which are connected by sealing rubber pipes, so that the working section of each screen pipe group can be sealed off, the pressure of the oil wells on the screen pipes can be dispersed, and the pressure of the oil wells on the screen pipes can be dispersed at the same time. The seeping oil slides down between the middle filter tube and the support tube to avoid direct contact with the screen wall and affect its heat balance; The pressurization in the sleeve, the use of air pressure to push the screen wall out and unfold, is convenient for the screen wall and the oil outlet channel to directly fit, avoid oil accumulation, and exert pressure on the screen tube group; in addition, the screen wall structure supported by air pressure After being hit by oil pressure, it can be buffered to a certain extent, which further protects the structure of the screen tube group.

Of course, it is not necessary for any product embodying the present invention to achieve all of the above-described advantages simultaneously.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is a kind of assembly structure diagram of a pressure-resistant screen tube unit for high temperature oil well work according to the present invention;

2 is a front view of a pressure-resistant screen pipe for high-temperature oil well work according to the present invention;

Fig. 3 is the structural representation of section A-A in Fig. 2;

Fig. 4 is a partial display diagram of part B in Fig. 3;

Fig. 5 is the structural representation of section C-C in Fig. 3;

FIG. 6 is a partial view of part D in FIG. 5 .

In the accompanying drawings, the list of components represented by each number is as follows:

1. Locking sliding pipe; 2. Supporting pipe; 3. Middle filter pipe; 4. Screening filter wall; 201. Supporting sliding sleeve; 401. Slide rod plug; 402, Screen rod; 403, Screen plate; 101, Pressurized air hole ; 301, sealing hose; 302, limit plate; 3021, limit chute; 404, connecting hinge plate; 303, middle filter hole.

Detailed ways

The technical solutions in 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "up", "middle", "outside", "inside", etc. indicate orientation or positional relationships, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or It is implied that the components or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Example 1:

Please refer to FIGS. 1-6 , the present invention is a pressure-resistant screen tube for high-temperature oil well work, including a locking slide tube 1, a support tube 2, a middle filter tube 3 and a screen wall 4, and the locking slide tube 1. The support tube 2 and the middle filter tube 3 are arranged in turn from the inside to the outside, and the support tube 2 is slidingly nested with the locking slide tube 1, and the middle filter tube 3 is fixedly nested with the support tube 2; Hinged to form a screen tube wall structure, nested on the outside of the middle filter tube 3, the opposite ends of the middle filter tube 3 are adhered with a sealing rubber tube 301, and the opposite ends of the support tube 2 are extended to the inside of the sealing rubber tube 301, and are connected with the sealing rubber tube 301. The rubber isolation tube 301 is adhered to form a sealing structure; the support tube 2, the middle filter tube 3 and the screen filter wall 4 constitute a screen tube group, and several screen tube groups are mutually adhered and fixed by the isolation rubber tube 301;

When using the screen tube device of the present invention, several screen tube groups need to be assembled with each other according to the design depth and then extended to the working position; during operation, the sealing rubber tube 301 is compressed and expanded to seal the working section of each screen tube group. , to disperse the pressure of the well on the screen.

Example 2:

There is a gap between the middle filter tube 3 and the support tube 2, and a number of support sliding sleeves 201 are welded between the two; the inner side of the screen filter wall 4 is welded with a sliding rod plug 401, and the sliding rod plug 401 extends through the middle filter tube 3 to The inside of the supporting sliding sleeve 201, and the sliding rod plug 401 and the supporting sliding sleeve 201 constitute a piston structure;

The sieve wall 4 includes a plurality of sieve rods 402 and a plurality of sieve plates 403, and the sieve rods 402 and the sieve plates 403 are alternately welded to each other to form an arc-shaped grid structure;

The locking slide pipe 1 is slidingly attached to the inner wall of the support pipe 2, and a plurality of pressurized air holes 101 are opened in the pipe wall of the locking slide pipe 1, and the pressurized air holes 101 and the support slide sleeve 201 are communicated with each other;

In actual work, firstly use the locking slide pipe 1 to inflate the inside of the screen tube group, and at the same time use the air pressure to expand the packing rubber tube 301, the locking slide tube 1 injects the air into the support slide sleeve 201 from the booster air hole 101, and uses the air pressure Push the sliding rod plug 401 and the screen filter wall 4 to extend outward, so that the outside of the screen filter wall 4 is close to the inner wall of the oil outlet channel, so as to avoid the gap between the outer wall of the screen tube group and the inner wall of the oil outlet channel, thereby increasing the oil to the screen tube group. wall pressure.

Example 3:

Two limit plates 302 are welded on the side surface of the middle filter tube 3, and the limit plates 302 are arranged between the middle filter tube 3 and the sealing rubber tube 301; a number of limit chutes 3021 are opened on one side of the sealing rubber tube 301; The two opposite sides of the filter wall 4 are hinged with connecting hinge plates 404, and the connecting hinge plates 404 between two adjacent screen filter walls 4 are hinged to each other, and the hinge shaft extends into the limit chute 3021, and is connected with the limit chute 3021. Sliding fit; the setting of the connecting hinge plate 404 can make the screen wall 4 maintain the continuous state of the outer wall of the screen tube group after being unfolded under pressure, so as to ensure the oil yield and work efficiency.

Preferably, a number of middle filter holes 303 are opened inside the pipe wall of the middle filter tube 3, and the diameter of the middle filter holes 303 is smaller than the mesh diameter of the screen filter wall 4; The oil in the group is double screened to improve the sand control ability.

Preferably, an expansion air hole is opened inside the pipe wall of the support pipe 2 of the section of the packing rubber tube 301, and the pressurizing air hole 101 communicates with the packing rubber tube 301 through the expansion air hole.

It should be further explained that since 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 interior, the air pressure generally acts directly on the screen filter wall 4 and the packing rubber pipe 301. It is more convenient to fit the screen tube group to the oil outlet channel.

In the description of this specification, description with reference to the terms "one embodiment," "example," "specific example," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one aspect of the present invention. in one embodiment or example. In this specification, schematic representations of the above terms 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 above-disclosed preferred embodiments of the present invention are provided only to help illustrate the present invention. The preferred embodiments do not exhaust all the details, nor do they limit the invention to only the described embodiments. Obviously, many modifications and variations are possible in light of the content of this specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is to be limited only by the claims and their full scope and equivalents.

Claims (4)

1. A pressure-resistant screen tube for high temperature oil well work, comprising a locking slide tube (1), a support tube (2), a middle filter tube (3) and a screen filter wall (4), characterized in that: the The locking slide tube (1), the support tube (2), and the middle filter tube (3) are arranged in sequence from the inside to the outside, and the support tube (2) and the locking slide tube (1) are slidably nested, and the middle filter tube (3) Fixed and nested with the support tube (2); a plurality of the screen filter walls (4) are hinged to each other end to end to form a screen tube wall structure, and are nested outside the middle filter tube (3); There is a gap between the middle filter tube (3) and the support tube (2), and a number of support sliding sleeves (201) are welded between the two; the inner side of the screen wall (4) is welded with a sliding rod plug ( 401), the sliding rod plug (401) extends to the inside of the supporting sliding sleeve (201) through the middle filter tube (3), and the sliding rod plug (401) and the supporting sliding sleeve (201) constitute a piston structure; The sieve wall (4) includes a plurality of sieve rods (402) and a plurality of sieve plates (403), and the sieve rods (402) and the sieve plates (403) are welded alternately to form an arc-shaped grid structure; The locking slide pipe (1) is slidingly attached to the inner wall of the support pipe (2), and a plurality of pressurized air holes (101) are opened inside the pipe wall of the locking slide pipe (1), and the pressurized air holes (101) are connected to the support The sliding sleeves (201) communicate with each other; Two opposite ends of the middle filter tube (3) are adhered with a sealing rubber tube (301), and both opposite ends of the support tube (2) extend to the inside of the sealing rubber tube (301), and are adhered to the sealing rubber tube (301) as follows. sealing structure; Two limit plates (302) are welded on the peripheral side of the middle filter tube (3), and the limit plates (302) are arranged between the middle filter tube (3) and the sealing rubber tube (301); the sealing A number of limit chutes (3021) are provided on one side of the hose (301); The screen walls (4) are hinged with connecting hinge plates (404) on two opposite sides, and the connecting hinge plates (404) between two adjacent screen walls (4) are hinged to each other, and the hinge shafts extend to the limit. in the position chute (3021), and slidingly fits with the limit chute (3021). 2 . The pressure-resistant screen tube for high temperature oil well work according to claim 1 , wherein a plurality of middle filter holes ( 303 ) are opened inside the tube wall of the middle filter tube ( 3 ), and the middle filter tube ( 3 ) The aperture of the filter hole (303) is smaller than the mesh aperture of the sieve wall (4). 3. A pressure-resistant screen tube for high temperature oil well work according to claim 2, characterized in that the support tube (2), the middle filter tube (3) and the screen filter wall (4) constitute a screen Tube groups, several screen tube groups are adhered and fixed to each other through the sealing rubber tube (301). 4. A pressure-resistant screen tube for high-temperature oil well operation according to claim 3, characterized in that, expansion holes are opened inside the tube wall of the support tube (2) in the section of the sealing rubber tube (301), And the pressurized air hole (101) is communicated with the packing rubber pipe (301) through the expansion air hole.

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