Sand prevention and water control sliding sleeve assembly with switch structure

Abstract

The utility model relates to the technical field of oil and gas well production, and discloses a sand prevention and water control sliding sleeve assembly with a switch structure, which comprises an outer sleeve, first water inlet holes are equidistantly formed in the circumference of the outer wall of the outer sleeve, sliding grooves are equidistantly formed in the circumference of the inner wall of the outer sleeve, and a second threaded groove is formed in the inner wall of the middle end of the outer sleeve. And a control assembly is arranged in the outer sleeve. The threaded sleeve is rotated, the threaded sleeve is rotationally connected with the inner pipe through the bearing, the threaded sleeve can drive the inner pipe to move upwards when rotating on the second threaded groove, the inner pipe slides upwards on the inner wall of the outer sleeve through the sliding block, and when the inner pipe moves upwards, the inner sealing sleeve is driven to seal and block the first water inlet hole. And the second density ring and the first density ring can well increase the sealing performance, and the distance between the second density ring and the first density ring is larger than the size of the first water inlet hole, so that the effect of controlling water infinitely is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas well production, in particular to a sand-proof and water-control sliding sleeve component with a switch structure. Background Art

[0002] With the exploration and development of unconventional oil and gas resources such as shale gas and shale oil, the horizontal well staged fracturing transformation technology has been effectively implemented. Reservoir fracturing transformation technology is to divide horizontal wells such as shale oil and gas and tight rock formations into multiple sections, and then fracture the formation into multiple fractures to expand the oil leakage area of ​​the oil and gas production layer, improve the oil and gas recovery rate, and thus increase the single well production. Horizontal well open hole staged fracturing technology is a type of reservoir fracturing transformation and has been widely promoted and applied in unconventional oil and gas fields at home and abroad. Among them, a flow channel is established with each layer section through a sliding sleeve. In this technology, whether different layers can be fractured according to the construction design, and the sliding sleeve tool in the completion string that establishes a flow channel with the formation is one of the key technologies.

[0003] The sliding sleeves currently used are all ball-throwing sliding sleeves, which have certain defects in the convenience of opening. When the amount of loose balls is too low, or the pin value is set too low or inaccurately, it will lead to the situation that it cannot be opened, thereby reducing the recovery rate of oil and gas wells. Utility Model Content

[0004] The utility model aims to provide a sand-proof and water-control sliding sleeve assembly with a switch structure, so that the device can increase sand prevention when controlling water, and at the same time control the rotation of the threaded sleeve to achieve the purpose of unlimited opening and closing.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sand-proof and water-control sliding sleeve assembly with a switch structure, comprising an outer sleeve, the outer wall of the outer sleeve is provided with water inlet holes equidistantly arranged around the circumference, the inner wall of the outer sleeve is provided with sliding grooves equidistantly arranged around the circumference, a second threaded groove is provided on the inner wall of the middle end of the outer sleeve, and a control assembly is arranged inside the outer sleeve.

[0006] Preferably, the outer wall of the outer sleeve is connected to a filter screen cylinder via bolts.

[0007] Preferably, an outer wall at one end of the outer sleeve is provided with an external thread groove, and an inner wall at the other end of the outer sleeve is provided with an internal thread groove.

[0008] Preferably, a partition is fixedly installed just below the internal threaded groove, and a connecting ring is provided on the top of the partition.

[0009] Preferably, the control component comprises: an inner tube, which is arranged inside the outer tube.

[0010] Preferably, two water inlet holes are equidistantly opened on the circumference of the outer wall of the inner tube, a fixed sleeve is fixedly provided on the outer wall of the middle end of the inner tube, a fixed sleeve is fixedly provided directly below the fixed sleeve, a density ring is fixedly connected to the bottom of the fixed sleeve, a density ring is fixedly connected to the top of the fixed sleeve, a sealing inner sleeve is fixedly connected between the density rings, and a threaded sleeve is rotatably connected to the outer wall of the bottom end of the inner tube through a bearing, and the threaded sleeve is threadedly connected to the second thread groove.

[0011] Preferably, sliding blocks are equidistantly mounted on the outer wall of the top end of the inner tube, and the sliding blocks are slidably connected to the sliding grooves.

[0012] Preferably, the density ring 1, the density ring 2 and the sealing inner sleeve are all fixedly mounted on the outer wall of the inner tube.

[0013] The utility model provides a sand-proof and water-control sliding sleeve assembly with a switch structure. It has the following beneficial effects:

[0014] (1) The utility model connects the filter screen cylinder with the outer sleeve by bolts, then connects a plurality of sliding sleeves together, and connects the bottom end of the outer sleeve with the top end of another outer sleeve by threads, so as to achieve the effect of preventing gravel in the water from entering the sliding sleeve when the device is used for water control in the later stage.

[0015] (2) The utility model rotates the threaded sleeve. Since the threaded sleeve and the inner tube are rotatably connected via a bearing, the threaded sleeve can drive the inner tube to move upward when rotating on the second threaded groove. The inner tube slides upward on the inner wall of the outer tube via a slider. When the inner tube moves upward, it drives the sealing inner sleeve to seal and block the water inlet hole 1 to prevent water from entering. The density ring 2 and the density ring 1 can well increase the sealing performance. The distance between the density ring 2 and the density ring 1 is larger than the size of the water inlet hole 1. Therefore, the size of the sealing inner sleeve is also larger than the size of the water inlet hole 1, thereby achieving an effect of unlimited water control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a front sectional view of the structure of the utility model;

[0018] Figure 3 This is a structural view of the control component of the utility model;

[0019] Figure 4 This is an exploded front view of the control assembly structure of the utility model.

[0020] In the figure: 1 outer sleeve, 2 filter screen, 3 bolt, 4 external thread groove, 5 internal thread groove, 6 control assembly, 7 baffle, 8 connecting ring, 9 slide groove, 10 second thread groove, 11 water inlet hole 1;

[0021] 611 inner tube, 612 water inlet hole 2, 613 fixed sleeve plate 1, 614 fixed sleeve plate 2, 615 density ring 1, 616 density ring 2, 617 sealing inner sleeve, 618 bearing, 619 threaded sleeve, 6111 slider. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Example 1

[0024] A preferred embodiment of a sand control and water control sleeve assembly with a switch structure provided by the utility model is as follows: Figure 1-4As shown: a sand control and water control sliding sleeve assembly with a switch structure, including an outer sleeve 1, the outer wall of the outer sleeve 1 is connected to a filter screen cylinder 2 by bolts 3, an outer wall of one end of the outer sleeve 1 is provided with an external thread groove 4, and an inner wall of the other end of the outer sleeve 1 is provided with an internal thread groove 5, the outer wall of the outer sleeve 1 is equidistantly provided with water inlet holes 11 on the circumference, the inner wall of the outer sleeve 1 is equidistantly provided with sliding grooves 9 on the circumference, a second thread groove 10 is provided on the inner wall of the middle end of the outer sleeve 1, a partition 7 is fixedly installed just below the internal thread groove 5, a connecting ring 8 is provided on the top of the partition 7, a control assembly 6 is provided inside the outer sleeve 1, and the control assembly 6 includes: an inner tube 611, which is arranged inside the outer sleeve 1; sliders 6111 are equidistantly installed on the outer wall of the top end of the inner tube 611, and the slider 61 11 is slidably connected with the slide groove 9, the outer wall of the inner tube 611 is equidistantly provided with water inlet holes 612, the middle end outer wall of the inner tube 611 is fixedly sleeved with a fixed sleeve plate 613, and a fixed sleeve plate 614 is fixedly sleeved directly below the fixed sleeve plate 613, the bottom of the fixed sleeve plate 613 is fixedly connected with a density ring 616, the top of the fixed sleeve plate 614 is fixedly connected with a density ring 1 615, and a sealing inner sleeve 617 is fixedly connected between the density ring 1 615 and the density ring 2 616. The density ring 1 615, the density ring 2 616 and the sealing inner sleeve 617 are all fixedly sleeved on the outer wall of the inner tube 611, and the outer wall of the bottom end of the inner tube 611 is rotatably connected with a threaded sleeve 619 through a bearing 618, and the threaded sleeve 619 is threadedly connected to the second thread groove 10.

[0025] Furthermore, in the embodiment, by rotating the threaded sleeve 619, since the threaded sleeve 619 and the inner tube 611 are rotatably connected through the bearing, the threaded sleeve 619 can drive the inner tube 611 to move upward when rotating on the second thread groove 10, and the inner tube 611 slides upward on the inner wall of the outer tube 1 through the slider 6111. When the inner tube 611 moves upward, it drives the sealing inner sleeve 617 to seal and block the water inlet hole 11 to prevent water from entering, and the density ring 2 616 and the density ring 1 615 can well increase the sealing performance, and the distance between the density ring 2 616 and the density ring 1 615 is larger than the size of the water inlet hole 11, so the size of the sealing inner sleeve 617 is also larger than the size of the water inlet hole 11. When the water needs to enter the inner tube 611, the threaded sleeve 619 is rotated in the opposite direction, so that the threaded sleeve 619 drives the inner tube 611 to move downward, so that the sealing inner sleeve 617 is separated from the water inlet hole 11.

[0026] When in use, first connect the filter screen cylinder with the outer sleeve by bolts, then connect multiple sliding sleeves together, connect the bottom end of the outer sleeve with the top end of another outer sleeve by threads, and the connecting ring can connect the two outer sleeves more tightly together. The control component and the outer sleeve are threaded together by the second thread groove. The size of the threaded sleeve is longer than that of the second thread groove. Rotate the threaded sleeve. Since the threaded sleeve and the inner tube are rotatably connected by the bearing, the threaded sleeve can drive the inner tube to move upward when it rotates on the second thread groove, and the inner tube By sliding the slider upward on the inner wall of the outer tube, the inner tube moves upward, driving the sealing inner sleeve to seal and block the water inlet hole 1 to prevent water from entering. The density ring 2 and the density ring 1 can well increase the sealing performance, and the distance between the density ring 2 and the density ring 1 is larger than the size of the water inlet hole 1, so the size of the sealing inner sleeve is also larger than the size of the water inlet hole 1. When the water needs to enter the inner tube, the threaded sleeve is rotated in the opposite direction to make the threaded sleeve drive the inner tube to move downward, so that the sealing inner sleeve is separated from the water inlet hole 1, and the water inlet hole 2 is flush with the water inlet hole 1.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sand control and water control sleeve assembly with a switch structure, comprising an outer sleeve (1), characterized in that: The outer wall of the outer sleeve (1) is provided with water inlet holes (11) at equal intervals on its circumference, the inner wall of the outer sleeve (1) is provided with sliding grooves (9) at equal intervals on its circumference, a second thread groove (10) is provided on the inner wall of the middle end of the outer sleeve (1), and a control component (6) is arranged inside the outer sleeve (1).

2. The sand control and water control sleeve assembly with a switch structure according to claim 1, characterized in that: The outer wall of the outer sleeve (1) is connected to a filter screen cylinder (2) via bolts (3).

3. The sand control and water control sleeve assembly with a switch structure according to claim 1, characterized in that: An outer thread groove (4) is formed on the outer wall of one end of the outer sleeve (1), and an inner thread groove (5) is formed on the inner wall of the other end of the outer sleeve (1).

4. The sand control and water control sleeve assembly with a switch structure according to claim 3, characterized in that: A partition plate (7) is fixedly mounted directly below the internally arranged threaded groove (5), and a connecting ring (8) is arranged on the top of the partition plate (7).

5. The sand control and water control sleeve assembly with a switch structure according to claim 1, characterized in that: The control component (6) comprises: The inner tube (611) is arranged inside the outer tube (1).

6. The sand control and water control sleeve assembly with a switch structure according to claim 5, characterized in that: The outer wall of the inner tube (611) is provided with two water inlet holes (612) at equal intervals on its circumference; a fixed sleeve plate (613) is fixedly sleeved on the outer wall of the middle end of the inner tube (611); a fixed sleeve plate (614) is fixedly sleeved directly below the fixed sleeve plate (613); a density ring (616) is fixedly connected to the bottom of the fixed sleeve plate (613); a density ring (615) is fixedly connected to the top of the fixed sleeve plate (614); a sealing inner sleeve (617) is fixedly connected between the density ring (615) and the density ring (616); a threaded sleeve (619) is rotatably connected to the outer wall of the bottom end of the inner tube (611) via a bearing (618); and the threaded sleeve (619) is threadedly connected to the second thread groove (10).

7. The sand control and water control sleeve assembly with a switch structure according to claim 5, characterized in that: Slide blocks (6111) are equidistantly mounted on the outer wall of the top end of the inner tube (611), and the slide blocks (6111) are slidably connected to the slide groove (9).

8. The sand control and water control sleeve assembly with a switch structure according to claim 6, characterized in that: The density ring 1 (615), the density ring 2 (616) and the sealing inner sleeve (617) are all fixedly sleeved on the outer wall of the inner tube (611).

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