Constant pressure sliding sleeve for packer

Abstract

The constant-pressure sliding sleeve comprises a shell, openings are formed in the two ends of the shell, unsealing sliding sleeves and setting sliding sleeves are arranged on the inner walls of the two sides of the shell in a sleeved mode, the two unsealing sliding sleeves are oppositely arranged, the two setting sliding sleeves are oppositely arranged, and the unsealing sliding sleeve and the setting sliding sleeve which are located on the same side abut against each other. First pressure relief holes extending into the unsealing sliding sleeve are formed in the outer walls of the two sides of the shell correspondingly, first shear pins are embedded into the first pressure relief holes, second pressure relief holes extending into the setting sliding sleeve are formed in the outer walls of the two sides of the shell correspondingly, and second shear pins are embedded into the second pressure relief holes correspondingly. The end, away from the setting sliding sleeve, of the unsetting sliding sleeve is provided with a first slope, and the end, close to the unsetting sliding sleeve, of the setting sliding sleeve is provided with a second slope. The packer is convenient to operate, is matched with the packer for use, realizes stable setting and unsetting of the packer, meets the requirements of underground work, does not increase the operation difficulty, and is beneficial to popularization and use.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oilfield equipment technical field relates to a packer with constant pressure sliding sleeve. BACKGROUND

[0002] In the downhole operation construction of oil and gas field, it is needed to transport pipeline and tool to downhole for thousands of meters, in order to prevent the tool from falling into downhole, it is needed to fix the tool, and at the same time, it is needed to use the packer to seal the annulus of oil jacket, so as to prevent the phenomenon of pressure channeling layer during oil production, and during the period, the inside of the packer needs to be pressurized and released, but it is very inconvenient to pressurize and release the inside of the packer, and a device for pressurizing the inside of the packer is urgently needed. UTILITY MODEL CONTENTS

[0003] The utility model discloses a packer with constant pressure sliding sleeve, which solves the problem of inconvenient pressurization and release of the inside of the packer in the prior art.

[0004] The utility model discloses a packer with constant pressure sliding sleeve, which solves the problem of inconvenient pressurization and release of the inside of the packer in the prior art.

[0005] The utility model discloses a packer with constant pressure sliding sleeve, which solves the problem of inconvenient pressurization and release of the inside of the packer in the prior art.

[0006] The part of the unsealing sliding sleeve and the shell is provided with at least one first sealing groove, and the first sealing groove is embedded with a first sealing ring.

[0007] The part of the unsealing sliding sleeve and the shell is provided with at least one first sealing groove, and the first sealing groove is embedded with a first sealing ring.

[0008] The two openings of the shell are provided with threads.

[0009] The area of the first inclined surface is larger than that of the second inclined surface.

[0010] The end of the unsealing sliding sleeve close to the setting sliding sleeve is provided with a third inclined surface.

[0011] The first pressure ball is arranged on the second inclined surface, and the diameter of the first pressure ball is smaller than the distance between the two unsealing sliding sleeves.

[0012] The first inclined surface is provided with a second pressure ball, the second pressure ball is made of the same material as the first pressure ball, and the diameter of the second pressure ball is greater than the distance between the two unsealing sliding sleeves.

[0013] A cavity is arranged between the end of the unsealing sliding sleeve close to the setting sliding sleeve and the inner wall of the shell.

[0014] The cross sections of the two ends of the shell are circular, the cross section diameter of the end of the shell close to the unsealing sliding sleeve is greater than the cross section diameter of the end of the shell close to the setting sliding sleeve.

[0015] The packer with the constant pressure sliding sleeve has the advantages that:

[0016] Compared with the prior art, the packer with the constant pressure sliding sleeve is convenient to operate, and after being used in combination with the packer, the first pressure ball is put in and the inside of the downhole string is pressurized, so that the tubing is shut off, and when the pressure in the tubing and the pressure in the packer meet a certain pressure difference, the packer is set;

[0017] The second pressure ball is put in to cut the first and second cutting pins, the first and second pressure relief holes are exposed, the internal and external pressures are balanced, the tubing and the oil jacket are penetrated, and the packer is unsealed;

[0018] Meanwhile, the needs of downhole work can be met, the operation difficulty is not increased, and the packer with the constant pressure sliding sleeve is conducive to popularization and use. DRAWINGS

[0019] Figure 1 is an internal structure diagram of the packer with the constant pressure sliding sleeve of the utility model;

[0020] Figure 2 is an unsealing sliding sleeve structure diagram in the packer with the constant pressure sliding sleeve of the utility model;

[0021] Figure 3 is a setting sliding sleeve structure diagram in the packer with the constant pressure sliding sleeve of the utility model;

[0022] Figure 4 is a pressurizing and setting diagram of the packer with the constant pressure sliding sleeve of the utility model;

[0023] Figure 5 is a pressure relief and unsealing diagram of the packer with the constant pressure sliding sleeve of the utility model.

[0024] In the drawings, 1 is a shell, 2 is a first cutting pin, 3 is an unsealing sliding sleeve, 4 is a second cutting pin, 5 is a setting sliding sleeve, 6 is a first sealing groove, 7 is a first opening, 8 is a first inclined surface, 9 is a second inclined surface, 10 is a first steel ball, 11 is a second steel ball, 12 is a first sealing ring, 13 is a second sealing groove, 14 is a second sealing ring, 15 is a first pressure relief hole, 16 is a second pressure relief hole, 17 is a third inclined surface, and 18 is a cavity. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Constant pressure sliding sleeve for packer, refer to Figure 1 , including a shell 1, both ends of the shell 1 are provided with openings 7, the inner walls of both sides of the shell 1 are provided with an unsealing sleeve 3 and a setting sleeve 5, the two unsealing sleeves 3 are arranged oppositely, the two setting sleeves 5 are arranged oppositely, the unsealing sleeve 3 and the setting sleeve 5 located on the same side are abutted against each other, the outer walls of both sides of the shell 1 are provided with a first pressure relief hole 15 extending to the inside of the unsealing sleeve 3, the first pressure relief hole 15 is embedded with a first shear pin 2, the outer walls of both sides of the shell 1 are provided with a second pressure relief hole 16 extending to the inside of the setting sleeve 5, the second pressure relief hole 16 is embedded with a second shear pin 4, refer to Figure 2 The first inclined surface 8 is provided at one end of the unsealing sleeve 3 away from the setting sleeve 5. Figure 3 A second inclined surface 9 is provided on one end of the setting sliding sleeve 5 close to the unsealing sliding sleeve 3.

[0027] Reference Figure 1 At least one first sealing groove 6 is provided at the connection portion between the unsealing sleeve 3 and the shell 1, and a first sealing ring 12 is embedded in the first sealing groove 6. At least one second sealing groove 13 is provided at the connection portion between the setting sleeve 5 and the shell 1, and a second sealing ring 14 is embedded in the second sealing groove 13. Threads are provided at the two openings 7 of the shell 1. The threads close to the unsealing sleeve 3 are used to connect the packer, and the threads away from the unsealing sleeve 3 are used to connect the guide shoe or screen pipe; the area of ​​the first inclined surface 8 is larger than the area of ​​the second inclined surface 9, and a third inclined surface 17 is provided at the end of the unsealing sleeve 3 close to the setting sleeve 5.

[0028] Reference Figure 4 A first pressure ball 10 is provided on the second inclined surface 9. The diameter of the first pressure ball 10 is smaller than the distance between the unsealing sleeves 3 on both sides. The first pressure ball 10 can pass between the unsealing sleeves 3 on both sides and is located between the second inclined surface 9 and the third inclined surface 17, thereby finally achieving the setting of the packer. Figure 5 A second pressure ball 11 is provided on the first inclined surface 8. The second pressure ball 11 is made of the same material as the first pressure ball 10 and the diameter of the second pressure ball 11 is greater than the distance between the unsealing sleeves 3 on both sides. The second pressure ball 11 can sit on the first inclined surface 8 and squeeze the first inclined surface 8. Since the mass of the second pressure ball 11 is greater than the mass of the first pressure ball 10, the first shear pin 2 and the second shear pin 4 can be sheared to realize the unsealing of the packer.

[0029] Reference Figure 1The cavity 18 is arranged between the end of the unblocking sliding sleeve 3 close to the setting sliding sleeve 5 and the inner wall of the shell 1.

[0030] The working principle of the utility model is:

[0031] When the packer needs to be set, referring to Figure 4 The packer is connected to the packer by the constant-pressure sliding sleeve close to the unblocking sliding sleeve 3, the packer is connected to the shoe or screen pipe by the constant-pressure sliding sleeve away from the unblocking sliding sleeve 3, and the packer is connected to the downhole string, and the downhole string is connected to the oil pipe; the first pressure ball 10 is put into the packer, and the first pressure ball 10 is arranged between the second inclined surface 9 and the third inclined surface 17 after passing through the unblocking sliding sleeve 3 on both sides; at this time, the downhole string is pressurized, the setting sliding sleeve 5 is set, and the oil pipe is blocked; when the pressure difference between the pressure in the oil pipe and the pressure in the packer meets a certain requirement, the packer is set.

[0032] When the packer needs to be unblocked, referring to Figure 5 The second pressure ball 11 is put into the packer, and the second pressure ball 11 is arranged on the first inclined surface 8; because the area of the first inclined surface 8 is greater than the area of the second inclined surface 9, and the cross-sectional diameter of the end of the shell 1 close to the unblocking sliding sleeve 3 is greater than the cross-sectional diameter of the end of the shell 1 close to the setting sliding sleeve 5, the extrusion force generated by the second pressure ball 11 is greater under the same internal pressure; finally, the first shear pin 2 and the second shear pin 4 are sheared, the first pressure relief hole 15 and the second pressure relief hole 16 are exposed, the internal and external pressures are balanced, the oil pipe and the oil jacket are penetrated, and the packer is unblocked.

[0033] Embodiment 1:

[0034] The packer constant-pressure sliding sleeve comprises a shell 1, both ends of the shell 1 are provided with openings 7, the inner walls on both sides of the shell 1 are sleeved with unblocking sliding sleeves 3 and setting sliding sleeves 5, the two unblocking sliding sleeves 3 are oppositely arranged, the two setting sliding sleeves 5 are oppositely arranged, the unblocking sliding sleeve 3 and the setting sliding sleeve 5 on the same side are abutted, the outer walls on both sides of the shell 1 are provided with first pressure relief holes 15 extending into the unblocking sliding sleeve 3, the first pressure relief holes 15 are embedded with first shear pins 2, the outer walls on both sides of the shell 1 are provided with second pressure relief holes 16 extending into the setting sliding sleeve 5, the second pressure relief holes 16 are embedded with second shear pins 4, the end of the unblocking sliding sleeve 3 away from the setting sliding sleeve 5 is provided with a first inclined surface 8, and the end of the setting sliding sleeve 5 close to the unblocking sliding sleeve 3 is provided with a second inclined surface 9.

[0035] The part where the unblocking sleeve 3 is connected with the shell 1 is provided with three first sealing grooves 6, and the first sealing grooves 6 are embedded with first sealing rings 12; the part where the setting sleeve 5 is connected with the shell 1 is provided with three second sealing grooves 13, and the second sealing grooves 13 are embedded with second sealing rings 14; the two openings 7 of the shell 1 are provided with threads; a cavity 18 is arranged between the end of the unblocking sleeve 3 close to the setting sleeve 5 and the inner wall of the shell 1; the cross sections of the two ends of the shell 1 are circular; the cross section diameter of the end of the shell 1 close to the unblocking sleeve 3 is larger than the cross section diameter of the end of the shell 1 close to the setting sleeve 5.

[0036] Embodiment 2

[0037] The packer pressure maintaining sleeve comprises a shell 1, the two ends of the shell 1 are provided with openings 7, the inner walls of the two sides of the shell 1 are sleeved with unblocking sleeves 3 and setting sleeves 5, the two unblocking sleeves 3 are oppositely arranged, the two setting sleeves 5 are oppositely arranged, the unblocking sleeves 3 and the setting sleeves 5 on the same side are abutted, the outer walls of the two sides of the shell 1 are provided with first pressure relief holes 15 extending into the unblocking sleeves 3, the first pressure relief holes 15 are embedded with first shear pins 2, the outer walls of the two sides of the shell 1 are provided with second pressure relief holes 16 extending into the setting sleeves 5, the second pressure relief holes 16 are embedded with second shear pins 4, the end of the unblocking sleeve 3 away from the setting sleeve 5 is provided with a first inclined surface 8, and the end of the setting sleeve 5 close to the unblocking sleeve 3 is provided with a second inclined surface 9.

[0038] The part where the setting sleeve 5 is connected with the shell 1 is provided with four second sealing grooves 13, and the second sealing grooves 13 are embedded with second sealing rings 14; the two openings 7 of the shell 1 are provided with threads; the area of the first inclined surface 8 is larger than the area of the second inclined surface 9; the end of the unblocking sleeve 3 close to the setting sleeve 5 is provided with a third inclined surface 17; the cross sections of the two ends of the shell 1 are circular; the cross section diameter of the end of the shell 1 close to the unblocking sleeve 3 is larger than the cross section diameter of the end of the shell 1 close to the setting sleeve 5.

[0039] Embodiment 3

[0040] The packer pressure maintaining sleeve comprises a shell 1, the two ends of the shell 1 are provided with openings 7, the inner walls of the two sides of the shell 1 are sleeved with unblocking sleeves 3 and setting sleeves 5, the two unblocking sleeves 3 are oppositely arranged, the two setting sleeves 5 are oppositely arranged, the unblocking sleeves 3 and the setting sleeves 5 on the same side are abutted, the outer walls of the two sides of the shell 1 are provided with first pressure relief holes 15 extending into the unblocking sleeves 3, the first pressure relief holes 15 are embedded with first shear pins 2, the outer walls of the two sides of the shell 1 are provided with second pressure relief holes 16 extending into the setting sleeves 5, the second pressure relief holes 16 are embedded with second shear pins 4, the end of the unblocking sleeve 3 away from the setting sleeve 5 is provided with a first inclined surface 8, and the end of the setting sleeve 5 close to the unblocking sleeve 3 is provided with a second inclined surface 9.

[0041] The area of the first inclined surface 8 is greater than the area of the second inclined surface 9, the unseating sleeve 3 is provided with a third inclined surface 17 at one end close to the setting sleeve 5, the first pressure ball 10 is arranged on the second inclined surface 9, the diameter of the first pressure ball 10 is smaller than the distance between the two unseating sleeves 3, the cross sections of the two ends of the shell 1 are circular, and the cross section diameter of the shell 1 close to the unseating sleeve 3 is greater than the cross section diameter of the shell 1 close to the setting sleeve 5.

[0042] Embodiment 4

[0043] The pressure-keeping sleeve for packers comprises a shell 1, the two ends of the shell 1 are provided with openings 7, the inner walls of the two sides of the shell 1 are both sleeved with unseating sleeves 3 and setting sleeves 5, the two unseating sleeves 3 are oppositely arranged, the two setting sleeves 5 are oppositely arranged, the unseating sleeves 3 and the setting sleeves 5 on the same side are abutted, the outer walls of the two sides of the shell 1 are both provided with first pressure relief holes 15 extending into the unseating sleeves 3, the first pressure relief holes 15 are embedded with first shear pins 2, the outer walls of the two sides of the shell 1 are both provided with second pressure relief holes 16 extending into the setting sleeves 5, the second pressure relief holes 16 are embedded with second shear pins 4, one end of the unseating sleeve 3 away from the setting sleeve 5 is provided with a first inclined surface 8, and one end of the setting sleeve 5 close to the unseating sleeve 3 is provided with a second inclined surface 9.

[0044] The two openings 7 of the shell 1 are both provided with threads, the first pressure ball 10 is arranged on the second inclined surface 9, the second pressure ball 11 is arranged on the first inclined surface 8, the diameter of the first pressure ball 10 is smaller than the distance between the two unseating sleeves 3, the second pressure ball 11 is made of the same material as the first pressure ball 10, and the diameter of the second pressure ball 11 is greater than the distance between the two unseating sleeves 3, the cross sections of the two ends of the shell 1 are circular, and the cross section diameter of the shell 1 close to the unseating sleeve 3 is greater than the cross section diameter of the shell 1 close to the setting sleeve 5.

[0045] Embodiment 5

[0046] The pressure-keeping sleeve for packers comprises a shell 1, the two ends of the shell 1 are provided with openings 7, the inner walls of the two sides of the shell 1 are both sleeved with unseating sleeves 3 and setting sleeves 5, the two unseating sleeves 3 are oppositely arranged, the two setting sleeves 5 are oppositely arranged, the unseating sleeves 3 and the setting sleeves 5 on the same side are abutted, the outer walls of the two sides of the shell 1 are both provided with first pressure relief holes 15 extending into the unseating sleeves 3, the first pressure relief holes 15 are embedded with first shear pins 2, the outer walls of the two sides of the shell 1 are both provided with second pressure relief holes 16 extending into the setting sleeves 5, the second pressure relief holes 16 are embedded with second shear pins 4, one end of the unseating sleeve 3 away from the setting sleeve 5 is provided with a first inclined surface 8, and one end of the setting sleeve 5 close to the unseating sleeve 3 is provided with a second inclined surface 9.

[0047] The part where the unblocking sleeve 3 is connected with the shell 1 is provided with three first sealing grooves 6, and the first sealing grooves 6 are embedded with first sealing rings 12. The part where the setting sleeve 5 is connected with the shell 1 is provided with three second sealing grooves 13, and the second sealing grooves 13 are embedded with second sealing rings 14. The two openings 7 of the shell 1 are provided with threads. The end of the unblocking sleeve 3 close to the setting sleeve 5 is provided with a cavity 18 between the inner wall of the shell 1.

[0048] Embodiment 6

[0049] The packer pressure maintaining sleeve comprises a shell 1, the two ends of the shell 1 are provided with openings 7, the inner walls of the two sides of the shell 1 are sleeved with unblocking sleeves 3 and setting sleeves 5, the two unblocking sleeves 3 are oppositely arranged, the two setting sleeves 5 are oppositely arranged, the unblocking sleeves 3 and the setting sleeves 5 on the same side are abutted, the outer walls of the two sides of the shell 1 are provided with first pressure relief holes 15 extending to the inside of the unblocking sleeves 3, the first pressure relief holes 15 are embedded with first shear pins 2, the outer walls of the two sides of the shell 1 are provided with second pressure relief holes 16 extending to the inside of the setting sleeves 5, the second pressure relief holes 16 are embedded with second shear pins 4, the end of the unblocking sleeve 3 away from the setting sleeve 5 is provided with a first inclined surface 8, and the end of the setting sleeve 5 close to the unblocking sleeve 3 is provided with a second inclined surface 9.

[0050] The two openings 7 of the shell 1 are provided with threads, the first inclined surface 8 is provided with a first pressure ball 10, the diameter of the first pressure ball 10 is smaller than the distance between the two unblocking sleeves 3, and the second inclined surface 9 is provided with a second pressure ball 11, the second pressure ball 11 is made of the same material as the first pressure ball 10, and the diameter of the second pressure ball 11 is greater than the distance between the two unblocking sleeves 3.

[0051] Embodiment 7

[0052] The packer pressure maintaining sleeve comprises a shell 1, the two ends of the shell 1 are provided with openings 7, the inner walls of the two sides of the shell 1 are sleeved with unblocking sleeves 3 and setting sleeves 5, the two unblocking sleeves 3 are oppositely arranged, the two setting sleeves 5 are oppositely arranged, the unblocking sleeves 3 and the setting sleeves 5 on the same side are abutted, the outer walls of the two sides of the shell 1 are provided with first pressure relief holes 15 extending to the inside of the unblocking sleeves 3, the first pressure relief holes 15 are embedded with first shear pins 2, the outer walls of the two sides of the shell 1 are provided with second pressure relief holes 16 extending to the inside of the setting sleeves 5, the second pressure relief holes 16 are embedded with second shear pins 4, the end of the unblocking sleeve 3 away from the setting sleeve 5 is provided with a first inclined surface 8, and the end of the setting sleeve 5 close to the unblocking sleeve 3 is provided with a second inclined surface 9.

[0053] Six second sealing grooves 13 are arranged at the connection part between the setting sleeve 5 and the shell 1, and a second sealing ring 14 is embedded in each second sealing groove 13. Threads are arranged at the two openings 7 of the shell 1. The area of the first inclined surface 8 is larger than that of the second inclined surface 9. A third inclined surface 17 is arranged at the end of the releasing sleeve 3 close to the setting sleeve 5.

Claims

1. A constant pressure sliding sleeve for packers, characterized in that, The utility model provides a casing (1) is provided with the opening (7) at both ends, and the inner wall of both sides of casing (1) is sleeved with the unblocking sliding sleeve (3) and the setting sliding sleeve (5), two unblocking sliding sleeves (3) are opposite, two setting sliding sleeves (5) are opposite, and the unblocking sliding sleeve (3) and the setting sliding sleeve (5) on the same side abut, the outer wall of both sides of casing (1) is provided with the first pressure relief hole (15) extending to the inside of unblocking sliding sleeve (3), the first pressure relief hole (15) is embedded with the first shear pin (2), the outer wall of both sides of casing (1) is provided with the second pressure relief hole (16) extending to the inside of setting sliding sleeve (5), the second pressure relief hole (16) is embedded with the second shear pin (4), and the first inclined plane (8) is arranged at the end of unblocking sliding sleeve (3) away from setting sliding sleeve (5), and the second inclined plane (9) is arranged at the end of setting sliding sleeve (5) close to unblocking sliding sleeve (3).

2. The constant pressure sleeve for a packer of claim 1, wherein, The part of unblocking sliding sleeve (3) and casing (1) is provided with at least one first sealing groove (6), and the first sealing groove (6) is embedded with the first sealing ring (12).

3. The constant pressure sleeve for a packer of claim 1, wherein, The part of setting sliding sleeve (5) and casing (1) is provided with at least one second sealing groove (13), and the second sealing groove (13) is embedded with the second sealing ring (14).

4. The constant pressure sleeve for a packer of claim 1, wherein, The both openings (7) of casing (1) are provided with threads.

5. The constant pressure sleeve for a packer of claim 1, wherein, The area of first inclined plane (8) is greater than the area of second inclined plane (9).

6. The constant pressure sleeve for a packer of claim 1, wherein, The end of unblocking sliding sleeve (3) close to setting sliding sleeve (5) is provided with third inclined plane (17).

7. The constant pressure sliding sleeve for a packer according to claim 1, characterized in that: The second inclined plane (9) is provided with first pressure ball (10), and the diameter of first pressure ball (10) is less than the distance between two unblocking sliding sleeves (3).

8. The constant pressure sleeve for a packer of claim 7, wherein, The first inclined plane (8) is provided with second pressure ball (11), and the material of second pressure ball (11) is same with first pressure ball (10), and the diameter of second pressure ball (11) is greater than the distance between two unblocking sliding sleeves (3).

9. The constant pressure sleeve for a packer of claim 1, wherein, The cavity (18) is arranged between the end of unblocking sliding sleeve (3) close to setting sliding sleeve (5) and the inner wall of casing (1).

10. The constant pressure sleeve for a packer of any one of claims 1-9, wherein, The cross section of both ends of casing (1) is circular, and the cross section diameter of the end of casing (1) close to unblocking sliding sleeve (3) is greater than the cross section diameter of the end of casing (1) close to setting sliding sleeve (5).

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