Casing pipe outer packer with bidirectional extrusion sealing function

Abstract

The utility model discloses a casing pipe outer packer with a bidirectional extrusion sealing function, and particularly relates to the technical field of casing pipe outer packers.The casing pipe outer packer comprises a hollow pipe, the top of the outer wall of the hollow pipe and the top of the outer wall of the hollow pipe are fixedly sleeved with first casing pipes, a second casing pipe is arranged between the two first casing pipes, the second casing pipe is fixedly arranged on the outer wall of the hollow pipe in a sleeved mode, and the first casing pipes and the second casing pipes are arranged in parallel. Expansion rubber sleeves are arranged between the two first sleeves and the second sleeve, the hollow pipe is sleeved with two extrusion assemblies which are symmetrically distributed up and down, each extrusion assembly comprises an extrusion block, the two extrusion blocks are arranged at the top and the bottom of the hollow pipe in a sleeving mode respectively, and limiting rings are fixedly arranged on the sides, close to each other, of the two extrusion blocks. The electric sliding table drives the extrusion block to automatically extrude the expansion rubber barrels for expansion, the expansion rubber barrels are uniform in stress and good in sealing performance and cannot contract due to the influence of pressure drop, meanwhile, the two expansion rubber barrels can achieve the bidirectional extrusion sealing function of the device, and the device is simple in overall structure and low in use cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of casing external packer, more specifically to the casing external packer with bidirectional extrusion sealing function. BACKGROUND

[0002] In the oil and gas field development well completion, cementing operation, according to the process requirement, need to use casing external packer to seal the wellbore and casing for a long time, for this requirement packer sets and seals long-term effective.Casing external packer is a kind of downhole tool connected with casing, used to seal casing external annulus (annular space between casing and the inner wall of wellbore), can effectively seal oil and gas layer, selectively exploitation or plugging a section, ensure the sealing of casing external annulus.Casing external packer can significantly improve cementing quality, effectively carry out interlayer isolation, avoid or reduce oil layer pollution, provide guarantee for improving oil recovery and exploitation efficiency.

[0003] For example, the prior art with publication number CN215108842U discloses a casing external packer, which utilizes the design of left and right clamping blocks, and after the left and right clamping blocks are spliced together, the expansion rubber tube can be clamped and fixed, and in combination with the design of the supporting block, the connection between the expansion rubber tube and the fixed limiting ring can be bent, so that the space inside the expansion rubber tube is more airtight.

[0004] However, the above-mentioned prior art still has the following problems when in use: because the downhole pressure of the oil well is different, the expansion rubber tube will shrink under the influence of pressure, thereby reducing the sealing performance. Based on this, the utility model provides a casing external packer with bidirectional extrusion sealing function, which has simple structure and high sealing effect. UTILITY MODEL CONTENTS

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a casing external packer with bidirectional extrusion sealing function, which is driven by an electric sliding table to automatically extrude the expansion rubber tube for expansion. The expansion rubber tube is uniformly stressed and has good sealing performance, and will not shrink under the influence of pressure drop. At the same time, the two expansion rubber tubes can realize the bidirectional extrusion sealing function of the device, and the overall structure of the device is simple and has low use cost, so as to solve the problems in the above-mentioned background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: the casing external packer with bidirectional extrusion sealing function, including the hollow tube, the hollow tube outer wall top and the outer wall top all are fixedly equipped with first sleeve, be equipped with second sleeve between two first sleeves, the second sleeve is fixedly equipped in the hollow tube outer wall, be equipped with expansion rubber cylinder between two first sleeves and the second sleeve, be used for playing the sealing effect in the oil well downhole inner wall, the hollow tube is equipped with two upper and lower symmetry distribution extrusion components, the extrusion component includes extrusion block, two extrusion blocks are equipped in the hollow tube top and bottom respectively, the side of two extrusion blocks is close to and all is fixedly equipped with limit ring, uses limit ring to drive extrusion block to move, in this way, the position of extrusion block is convenient to adjust, the inner wall of both sides of two limit rings is fixedly equipped with electric sliding table, the electric sliding table is fixed on the hollow tube, is used for adjusting the position of extrusion block.

[0007] In a preferred embodiment, the hollow tube is provided with two upper and lower distribution installation grooves on both sides of the outer wall, and a plurality of electric sliding tables are fixed in the plurality of installation grooves, for accommodating the electric sliding tables and improving the stability of the electric sliding tables.

[0008] In a preferred embodiment, the cross section of the two extrusion blocks is set as an isosceles trapezoid, and the inner cavity top and inner cavity bottom of the second sleeve are provided with annular receiving grooves, and the two extrusion blocks are arranged in the two annular receiving grooves, respectively. The extrusion blocks can automatically extrude and collide with the expansion rubber cylinders.

[0009] In a preferred embodiment, the two first sleeves are provided with annular insertion grooves on the side close to the second sleeve, the top end and the bottom end of the second sleeve, and the two expansion rubber cylinders are fixed in the two annular insertion grooves, respectively, to prevent the expansion rubber cylinders from falling off between the first sleeves and the second sleeve.

[0010] In a preferred embodiment, a battery compartment is fixedly arranged inside the hollow tube, and a storage battery for power supply is arranged inside the battery compartment, to provide electric energy for the electric sliding table and the illuminating lamp.

[0011] In a preferred embodiment, the top end and the bottom end of the hollow tube are provided with circular grooves, and a lifting ring is fixedly arranged in each circular groove, to lift and transport the hollow tube for installation and use.

[0012] In a preferred embodiment, the two first sleeves are fixedly embedded with illuminating lamps on the side away from each other, and the plurality of illuminating lamps can illuminate the inside of the oil well, to facilitate the installation of the device by the staff.

[0013] The technical effects and advantages of the utility model are as follows:

[0014] The utility model discloses a two -way extrusion sealing function's sleeve pipe outer packer is provided, including hollow pipe 1, the hollow pipe 1 outer wall top and outer wall top all fixed sleeve first sleeve pipe 2, and is equipped with second sleeve pipe 3 between two first sleeve pipe 2, second sleeve pipe 3 is fixedly covered in the hollow pipe 1 outer wall, and is equipped with expansion rubber cylinder 4 between two first sleeve pipe 2 and second sleeve pipe 3, is used for playing the sealing effect in the oil well downhole inner wall. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is whole structure schematic diagram of the utility model;

[0016] Figure 2 It is schematic diagram when expansion rubber cylinder of the utility model expands;

[0017] Figure 3 It is whole structure sectional view when expansion rubber cylinder of the utility model does not expand;

[0018] Figure 4 It is whole structure sectional view when expansion rubber cylinder of the utility model expands;

[0019] Figure 5 It is hollow pipe and extrusion subassembly schematic diagram of the utility model.

[0020] The sign is: 1, hollow pipe;2, first sleeve pipe;3, second sleeve pipe;4, expansion rubber cylinder;5, extrusion subassembly;6, installation groove;7, annular storage groove;8, annular slot;9, battery compartment;10, circular groove;11, lifting ring;12, illuminating lamp;

[0021] 501, extrusion block;502, limit ring;503, electric sliding table. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Refer to the drawings in the description Figures 1-5 The utility model provides two -way extrusion sealing function's sleeve pipe outer packer, including hollow pipe 1, the hollow pipe 1 outer wall top and outer wall top all fixed sleeve first sleeve pipe 2, and is equipped with second sleeve pipe 3 between two first sleeve pipe 2, second sleeve pipe 3 is fixedly covered in the hollow pipe 1 outer wall, and is equipped with expansion rubber cylinder 4 between two first sleeve pipe 2 and second sleeve pipe 3, is used for playing the sealing effect in the oil well downhole inner wall;

[0024] The hollow tube 1 is sleeved with two symmetrical extrusion assemblies 5, the extrusion assembly 5 comprises an extrusion block 501, two extrusion blocks 501 are respectively sleeved on the top and bottom of the hollow tube 1, and the two extrusion blocks 501 are fixed with a limiting ring 502 on the side close to each other. The limiting ring 502 drives the extrusion block 501 to move, so as to facilitate the adjustment of the position of the extrusion block 501. The two limiting rings 502 are fixed with an electric sliding table 503 on the inner wall of the two sides. The electric sliding table 503 is fixed on the hollow tube 1 and is used for adjusting the position of the extrusion block 501.

[0025] And, two installation grooves 6 are formed on the outer walls of the two sides of the hollow tube 1, a plurality of electric sliding tables 503 are respectively fixed in the installation grooves 6, and the electric sliding tables 503 are used for accommodating the electric sliding tables 503 and improving the stability of the electric sliding tables 503. The cross section of the two extrusion blocks 501 is an isosceles trapezoid. The inner cavity top and the inner cavity bottom of the second sleeve pipe 3 are provided with annular receiving grooves 7. The two extrusion blocks 501 are respectively arranged in the two annular receiving grooves 7, and the extrusion block 501 can automatically collide with the expansion rubber cylinder 4.

[0026] Moreover, annular insertion grooves 8 are formed on the side close to the second sleeve pipe 3 of the two first sleeve pipes 2 and the top and bottom of the second sleeve pipe 3. The two expansion rubber cylinders 4 are respectively fixed in the two annular insertion grooves 8, so as to avoid the expansion rubber cylinder 4 from falling off between the first sleeve pipe 2 and the second sleeve pipe 3.

[0027] In use, the first sleeve pipe 2 and the second sleeve pipe 3 are in contact with the oil well wall. After the first sleeve pipe 2 and the second sleeve pipe 3 are moved into position, the extrusion block 501 on the limiting ring 502 is driven by the electric sliding table 503 to move out of the annular receiving groove 7. Since the cross section of the extrusion block 501 is an isosceles trapezoid, the two extrusion blocks 501 respectively extrude the two expansion rubber cylinders 4 when moving, so as to expand the two expansion rubber cylinders 4. The expansion rubber cylinder 4 is uniformly stressed and has good sealing performance. The two expansion rubber cylinders 4 respectively play a sealing role between the second sleeve pipe 3 and the two first sleeve pipes 2, so as to realize the bidirectional extrusion sealing function of the device. After sealing, the extrusion block 501 is driven by the electric sliding table 503 to move into the annular receiving groove 7 again. The overall structure of the device is simple, and the use cost is low.

[0028] Refer to the drawings Figures 1-5 The side away from each other of the two first sleeve pipes 2 is fixedly embedded with a lighting lamp 12. The plurality of lighting lamps 12 can illuminate the inside of the oil well, so as to facilitate the installation of the device by the staff.

[0029] The hollow tube 1 is fixedly provided with a battery compartment 9. The battery compartment 9 is internally provided with a storage battery for power supply, which is used for providing electric energy for the electric sliding table 503 and the lighting lamp 12.

[0030] The hollow pipe 1 is provided with a circular groove 10 at the top end and the bottom end, and a lifting ring 11 is fixedly arranged in each circular groove 10, which is used for lifting the hollow pipe 1.

[0031] Finally: the above only for the preferred embodiments of the utility model have, and do not for limiting the utility model, any modification, equivalent replacement, improvement etc. which is made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A casing external packer with bidirectional extrusion sealing function, characterized in that: Including hollow tube (1), the outer wall top and the outer wall top of hollow tube (1) are fixedly provided with first sleeve (2), second sleeve (3) is arranged between two first sleeves (2), and second sleeve (3) is fixedly provided on the outer wall of hollow tube (1); Expansion rubber tube (4) is arranged between two first sleeves (2) and second sleeve (3), two upper and lower symmetrical distribution extrusion assemblies (5) are provided on hollow tube (1), extrusion assembly (5) includes extrusion block (501), two extrusion blocks (501) are respectively provided on the top and bottom of hollow tube (1), and limit ring (502) is fixedly arranged on the side of two extrusion blocks (501) close to each other, two limit rings (502) are fixedly provided with electric sliding table (503) on the inner wall of both sides, and electric sliding table (503) is fixed on hollow tube (1), for adjusting the position of extrusion block (501).

2. The casing external packer with bidirectional extrusion sealing function according to claim 1, characterized in that: The outer wall of hollow tube (1) is provided with two upper and lower distribution mounting grooves (6) on both sides, a plurality of electric sliding tables (503) are respectively fixed in a plurality of mounting grooves (6), for accommodating electric sliding table (503).

3. The casing external packer with bidirectional extrusion sealing function according to claim 1, characterized in that: The cross section of two extrusion blocks (501) is set as isosceles trapezoid, the inner cavity top and inner cavity bottom of second sleeve (3) are provided with annular receiving groove (7), and two extrusion blocks (501) are respectively arranged in two annular receiving grooves (7).

4. The external casing packer with bidirectional extrusion sealing function according to claim 1, characterized in that: Two first sleeves (2) close to second sleeve (3) side, second sleeve (3) top and bottom are provided with annular insertion slot (8), and two expansion rubber tubes (4) are respectively fixed in two annular insertion slots (8).

5. The external casing packer with bidirectional extrusion sealing function according to claim 1, characterized in that: The inside of hollow tube (1) is fixedly provided with battery compartment (9), and the inside of battery compartment (9) is placed with battery for power supply.

6. The casing external packer with bidirectional extrusion sealing function according to claim 1, characterized in that: The top and bottom of hollow tube (1) are provided with circular groove (10), and each circular groove (10) is fixedly provided with lifting ring (11) for lifting hollow tube (1).

7. The external casing packer with bidirectional extrusion sealing function according to claim 1, characterized in that: Two first sleeves (2) are fixedly embedded with illuminating lamp (12) on the side away from each other, for lighting effect.

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