CN109186866B - Packer seal testing device - Google Patents
Packer seal testing device Download PDFInfo
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- CN109186866B CN109186866B CN201811005621.3A CN201811005621A CN109186866B CN 109186866 B CN109186866 B CN 109186866B CN 201811005621 A CN201811005621 A CN 201811005621A CN 109186866 B CN109186866 B CN 109186866B
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- sliding sleeve
- inner barrel
- sealing
- seal
- annular space
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Abstract
The utility model provides a packer tests sealing device, relates to oil well instrument technical field, including urceolus, inner tube, sliding sleeve and seal assembly, the inner tube cover is located in the urceolus, be equipped with first annular space between the two of inner tube and urceolus, the lower port of first annular space is sealed, be equipped with on the section of thick bamboo wall of inner tube with the inner tube trompil of first annular space intercommunication, the sliding sleeve cover is located in the inner tube, be equipped with on the sliding sleeve with the staggered sliding sleeve trompil of inner tube trompil, the sliding sleeve trompil with seal between the inner tube, the inner tube trompil with seal between the sliding sleeve, seal assembly sets up to with the upper port of sliding sleeve is sealed, the sliding sleeve can be relative under the exogenic action the inner tube slides to making the sliding sleeve trompil. The seal checking device provided by the embodiment of the invention can be applied to seal checking operation of a packer, and the seal checking is reliable.
Description
Technical Field
The application relates to the technical field of oil well tools, in particular to a packer seal testing device.
Background
At present, deep wells, major workovers, highly deviated wells and horizontal wells are increasing, and increasingly high requirements are put forward on a layer-by-layer filling sand prevention process. The core component of the tool used in the layer-by-layer filling sand control process is an inner and outer pipe column, and the following problems exist at present: 1. the seal inspection is unreliable, pressure leakage is easy to occur, and the seal inspection operation of the packer cannot be realized; 2. the operation of highly deviated wells and horizontal wells cannot be realized under the influence of the well structure. The defects greatly restrict the application range of the pipe column and increase the operation risk.
Disclosure of Invention
The embodiment of the invention provides a packer seal inspection device which comprises an outer barrel, an inner barrel, a sliding sleeve and a sealing assembly, wherein the inner barrel is sleeved in the outer barrel, a first annular space is arranged between the inner barrel and the outer barrel, a lower port of the first annular space is sealed, an inner barrel opening communicated with the first annular space is formed in the barrel wall of the inner barrel, the sliding sleeve is sleeved in the inner barrel, a sliding sleeve opening staggered with the inner barrel opening is formed in the sliding sleeve, the sliding sleeve opening is sealed with the inner barrel, the inner barrel opening is sealed with the sliding sleeve, the sealing assembly is arranged to seal an upper port of the sliding sleeve, and the sliding sleeve can slide relative to the inner barrel under the action of external force to a position enabling the sliding sleeve opening to be communicated with the inner barrel opening.
Has the advantages that:
the seal checking device provided by the embodiment of the invention can be applied to seal checking operation of a packer, and the seal checking is reliable.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the embodiments of the invention serve to explain the principles of the embodiments of the invention and not to limit the embodiments of the invention.
FIG. 1 is a schematic structural diagram of a seal inspection device according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the seal inspection device shown in FIG. 1, wherein the sliding sleeve slides to a position where the opening of the sliding sleeve is communicated with the opening of the inner cylinder;
fig. 3 is a schematic diagram of the seal inspection device according to an embodiment of the present invention.
The reference signs are: 1. the sealing device comprises an upper joint, 2, an overflowing block, 3, a protective barrel, 4, a sealing block, 5, a shear pin, 6, an inner barrel, 7, a sliding sleeve, 8, a short joint, 9, a lower joint, 10, a spacer ring, 11, a first sealing ring, 12, a second sealing ring, 13, an outer sealing assembly, 14, a third sealing ring, 15, a fourth sealing ring, 16, a spring, 17, a connecting rod, 18, a protective plate, 19, a first annular space, 20, a second annular space, 21, an inner barrel opening, 22, a sliding sleeve opening, 23, a step, 24, an outer barrel, 25, an inner barrel limiting platform, 26, a sliding sleeve limiting platform, 27, a packer, 28, a sealing device, 29, a shaft pipe column, 30, a service pipe column, 31, a seal testing device, 32, a well mouth, 33 and an oil well casing.
The arrows in fig. 3 represent the flow direction of the sealing liquid.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application.
As shown in fig. 1 and 2, an embodiment of the present invention provides a packer testing device, which comprises an outer cylinder 24, an inner cylinder 6, a sliding sleeve 7 and a sealing assembly, the inner cylinder 6 is sleeved in the outer cylinder 24, a first annular space 19 is arranged between the inner cylinder 6 and the outer cylinder 24, the lower port of the first annular space 19 is sealed, the wall of the inner cylinder 6 is provided with an inner cylinder opening 21 communicated with the first annular space 19, the sliding sleeve 7 is sleeved in the inner cylinder 6, a sliding sleeve opening 22 staggered with the inner cylinder opening 21 is arranged on the sliding sleeve 7, the sliding sleeve opening 22 and the inner cylinder 6 are sealed, the inner cylinder opening 21 and the sliding sleeve 7 are sealed, the sealing assembly is arranged to seal the upper port of the sliding sleeve 7, and the sliding sleeve 7 can slide relative to the inner cylinder 6 under the action of external force to a position where the sliding sleeve opening 22 is communicated with the inner cylinder opening 21.
In this embodiment, the outer cylinder 24 includes an upper joint 1, a short joint 8 and a lower joint 9, two ends of the short joint 8 are respectively in threaded connection with the lower end of the upper joint 1 and the upper end of the lower joint 9, and the joints of the short joint 8 and the upper joint 1 and the lower joint 9 are respectively provided with a sealing ring for sealing. Lower clutch 9 includes lower clutch extension section and lower clutch main part section, form a step 23 between lower clutch extension section and the lower clutch main part section between the two, the lower extreme threaded connection of inner tube 6 is in on the lower clutch extension section, and the department of meeting between inner tube 6 and lower clutch 9 is equipped with third sealing washer 14 and seals, 8 threaded connection of short joint in on the lower clutch main part section. The upper port of the inner cylinder 6 is located in the outer cylinder 24, so that the outer cylinder 24 can be connected with other matching tools in practical application of the seal inspection device of the embodiment.
In this embodiment, the sliding sleeve 7, the inner cylinder 6 and the outer cylinder 24 are coaxially arranged, the upper port of the sliding sleeve 7 is located in the outer cylinder 24, two sealing rings are respectively arranged on the outer wall of the sliding sleeve 7 at two sides of the sliding sleeve opening 22, and the two sealing rings are sealed with the inner wall of the inner cylinder 6; and a fourth sealing ring 15 is arranged at the lower part of the position, corresponding to the inner cylinder opening 21, on the outer wall of the sliding sleeve 7, and the fourth sealing ring 15 is sealed with the inner wall of the inner cylinder 6. When the sliding sleeve 7 can not slide relative to the inner cylinder 6, the three sealing rings on the outer wall of the sliding sleeve 7 enable the sliding sleeve opening 22 and the inner cylinder opening 21 to be in a non-communicated state, the inside of the sliding sleeve 7 and the first annular space 19 are not communicated, and good sealing performance is guaranteed.
In this embodiment, the sliding sleeve 7 is fixed in the inner cylinder 6 through the shear pin 5, and the shear pin 5 is cut off by the sliding sleeve 7 under the action of external force and slides relative to the inner cylinder 6.
In this embodiment, be equipped with the spacing platform 25 of inner tube on the inner wall of inner tube 6, be equipped with the spacing platform 26 of sliding sleeve on the outer wall of sliding sleeve 7, sliding sleeve 7 is relative under the exogenic action after inner tube 6 slides to the right place, the spacing platform 25 of inner tube can block the spacing platform 26 of sliding sleeve makes sliding sleeve 7 stop sliding. The sliding sleeve 7 slides downwards relative to the inner cylinder 6, and stops sliding to the position corresponding to the position of the sliding sleeve opening 22 and the position corresponding to the position of the inner cylinder opening 21, at the moment, the sliding sleeve opening 22, the inner cylinder opening 21 and the first annular space 19 are communicated, so that a circulation channel for communicating an upper port and a lower port of the outer cylinder 24 is formed in the sealing device.
In this embodiment, seal assembly includes connecting rod 17, spring 16, spring holder and sealed piece 4, the one end of connecting rod 17 with sealed 4 threaded connection, the first pole hole that the connecting rod 17 other end set up on the spring holder is worn out in the activity, is equipped with the spring spacing groove on the spring holder, and 16 covers of spring are established on connecting rod 17 and are compression state, and the one end butt of spring 16 is in the spacing inslot of spring, the other end butt is in on the sealed piece 4, spring 16 utilizes its self elasticity will sealed piece 4 compresses tightly in the last port department of sliding sleeve 7 is in order to form sealedly.
In this embodiment, the inner wall of the upper port of the sliding sleeve 7 is provided with a first conical surface, the sealing block 4 is provided with a second conical surface in sealing fit with the first conical surface, and the sealing block 4 and the sliding sleeve 7 realize metal-to-metal sealing by applying a pretightening force through the spring 16. And the first conical surface and the second conical surface are both arc surface structures.
The sealing assembly that this embodiment seal inspection device adopted, its elasticity that utilizes spring 16 self seals sealing block 4 in the up end department of sliding sleeve 7, and this kind of sealing mode does not receive the restriction of well structure for this seal inspection device not only can be applied to the seal inspection of straight well, directional well, still can be applied to the seal inspection operation of highly deviated well and horizontal well, and conventional seal inspection device can only be used for the directional well of straight well or less inclination. The seal checking device can reliably seal in wells with different slopes, pressure leakage cannot occur in the seal checking process, and the seal checking is reliable.
In this embodiment, the seal inspection device further includes a protection cylinder 3, one end of the protection cylinder 3 is in threaded connection with the upper end of the inner cylinder 6, a protection plate 18 is arranged at an opening at the other end of the protection cylinder 3, one end of the protection cylinder 3, which is provided with the protection plate 18, is located in the outer cylinder 24, and a spring seat of the sealing assembly is fixed on the protection plate 18, or the protection plate 18 and the spring seat are of an integral structure.
A second annular space 20 is arranged between the protection cylinder 3 and the outer cylinder 24, and the second annular space 20 is communicated with the first annular space 19. The protection plate 18 or the protection cylinder 3 is provided with a first flow through hole communicated with the interior of the protection cylinder 3, the protection plate 18 and the protection cylinder 3 can be provided with first flow through holes, and the first flow through holes mainly play a role in communicating the second annular space 20 with the interior space of the protection cylinder 3. In practical application of the seal checking device, pressure injected through an upper port of the seal checking device can act on the sealing block 4 of the sealing assembly through the first flow through hole, and the shear pin 5 sheared by the sliding sleeve 7 slides downwards relative to the inner barrel 6.
In this embodiment, a boss is disposed on an inner wall of an upper end of the outer cylinder 24, the boss is provided with an overflow block 2, the overflow block 2 is provided with a second rod hole and a second flow through hole, after the other end of the connecting rod 17 of the sealing assembly movably penetrates through the first rod hole of the spring seat, the other end of the connecting rod movably penetrates through the second rod hole of the overflow block 2, and the second flow through hole is used for communicating an inner space of the outer cylinder 24 at upper and lower sides of the overflow block 2. The overflowing block 2 is arranged to mainly prevent sundries from falling into the seal checking device in practical application.
In practical applications, the seal testing device of the present embodiment can be used to pack gravel packing strings used in sand control processes layer by layer, as shown in fig. 3. Specifically, a gravel packing string comprises a wellbore string 29 and a service string 30, the service string 30 is sleeved in the wellbore string 29, and both the wellbore string 29 and the service string 30 comprise a plurality of sequentially connected components or assemblies. Wherein the service string 30 is re-usable after completion of the filling and is removed from the wellhead 32. In the layer-by-layer filling sand control process, the packer 27 at the upper end of the shaft pipe column 29 is sealed with the oil well casing pipe 33, and in order to ensure that the filling operation is smoothly carried out, the sealing performance of the packer 27 at the upper end of the shaft pipe column 29 needs to be checked.
In practical application, the upper port and the lower port of the outer cylinder 24 of the seal testing device 31 of the present embodiment are respectively connected with other components or assemblies of the service string 30, and are kept in sealing connection at the connection, that is, the seal testing device 31 of the present embodiment is used as a certain pipe section of the service string 30. In this embodiment, the outer walls at both ends of the short joint 8 of the seal inspection device 31 are provided with outer seal assemblies 13, and the outer wall at the lower end of the lower joint 9 is provided with a spacer ring 10, a first seal ring 11 and a second seal ring 12. The outer seal assembly 13, the spacer ring 10, the first seal ring 11 and the second seal ring 12 are all used for sealing with the inner wall of the shaft pipe column 29 so as to ensure the inner and outer isolation of the service pipe column 30. Other sealing structures can be used for sealing between the outer cylinder 24 of the seal testing device 31 and the inner wall of the well bore string 29.
In the layer-by-layer packing sand control process, the upper end of service string 30 extends out of wellhead 32, and packer 27 at the upper end of wellbore string 29 seals with well casing 33. When the seal is tested, the spring 16 of the seal testing device 31 of the present embodiment is in a compressed state, and the seal block 4 is pressed against the upper port of the sliding sleeve 7 by its own elastic force to form a seal, i.e. the sliding sleeve 7 of the seal testing device 31 of the present embodiment is in the position shown in fig. 1, the upper port of the annular space between the wellbore string 29 and the service string 30 is sealed by the sealing device 28, and the upper port of the service string 30 and the upper port of the annular space between the well casing 33 and the service string 30 are also in a sealed state, i.e. the well head 32 is in a sealed state. Then, injecting a sealing liquid between the service string 30 and the oil well casing 33, wherein the direction of the arrow in fig. 3 represents the flow direction of the sealing liquid, and due to the sealing action of the packer 27 at the upper end of the wellbore string 29 and the sealing device 28, the sealing liquid flows into the service string 30 from the opening at the upper part of the service string 30, and when the sealing liquid flows to the position of the sealing device 31 in the embodiment, the sealing liquid cannot flow downwards continuously because the flow channel inside the sealing device 31 in the embodiment is not communicated, the sealing liquid is injected continuously, and the pressure is increased to 1000psi, and the pressure is stabilized for a certain time, i.e. the pressure is suppressed.
The sealing condition of the packer 27 is determined by observing the pressure change of a pressure gauge arranged on a wellhead seal checking liquid pipeline. After the pressure is held for a certain time, the reading of the pressure gauge is constant or the change is very small, which indicates that the sealing performance of the packer 27 is good; when the pressure gauge reading drops, it indicates that the packer 27 is not sealed well.
When the seal checking operation is completed, the pressure of the seal checking liquid is increased to 2500psi, the shear pin 5 is cut off by the sliding sleeve 7 of the seal checking device 31 in this embodiment, and the sliding sleeve 7 slides downward relative to the inner cylinder 6 to a position where the sliding sleeve opening 22 communicates with the inner cylinder opening 21, and then stops, as shown in fig. 2, at this time, the sliding sleeve opening 22, the inner cylinder opening 21, the first annular space 19, and the second annular space 20 communicate with each other, so that the internal flow passage of the service string 30 communicates with the seal checking device 31 in this embodiment, and thus, a fluid passage can be provided for the subsequent filling operation.
The seal inspection device of this embodiment can be applied to the seal inspection operation of directional well, highly deviated well and horizontal well, and the homoenergetic is reliably sealed in different inclination wells, tests the in-process and can not appear leaking the pressure, tests to seal reliably.
Claims (9)
1. The utility model provides a packer tests a device which characterized in that: the outer barrel is sleeved with the inner barrel, a first annular space is arranged between the inner barrel and the outer barrel, a lower port of the first annular space is sealed, an inner barrel opening communicated with the first annular space is formed in the barrel wall of the inner barrel, the sliding sleeve is sleeved in the inner barrel, the sliding sleeve is fixed in the inner barrel through shear pins, sliding sleeve openings staggered with the inner barrel opening are formed in the sliding sleeve, the sliding sleeve openings are sealed with the inner barrel, the inner barrel opening is sealed with the sliding sleeve, the sealing assembly is set to seal an upper port of the sliding sleeve, and the sliding sleeve can be cut off under the action of external force to enable the shear pins to slide relative to the inner barrel, so that the sliding sleeve opening is communicated with the inner barrel opening.
2. The packer setting inspection device of claim 1, wherein: the sealing assembly comprises a connecting rod, a spring seat and a sealing block, one end of the connecting rod is connected with the sealing block, the spring is sleeved on the connecting rod, one end of the spring is abutted to the spring seat, and the other end of the spring compresses the sealing block tightly at the upper port of the sliding sleeve to form sealing.
3. The packer setting inspection device of claim 2, wherein: the seal inspection device further comprises a protective cylinder, one end of the protective cylinder is connected with the upper end of the inner cylinder, a protective plate is arranged at the opening of the other end of the protective cylinder, a first flow through hole communicated with the interior of the protective cylinder is formed in the protective plate or the protective cylinder, the spring seat is fixed on the protective plate, and the connecting rod penetrates through the first rod hole formed in the spring seat in a movable mode.
4. The packer setting inspection device of claim 3, wherein: and a second annular space is arranged between the protection barrel and the outer barrel, and the second annular space is communicated with the first annular space.
5. The packer setting inspection device of claim 3, wherein: the protection plate and the spring seat are of an integrated structure.
6. The packer setting inspection device of claim 2, wherein: the inner wall of the upper port of the sliding sleeve is provided with a first conical surface, and the sealing block is provided with a second conical surface in sealing fit with the first conical surface.
7. The packer setting inspection device of claim 1, wherein: the inner wall of the inner barrel is provided with an inner barrel limiting table, the outer wall of the sliding sleeve is provided with a sliding sleeve limiting table, the sliding sleeve is opposite under the action of external force after the inner barrel slides in place, and the inner barrel limiting table can block the sliding sleeve limiting table to enable the sliding sleeve to stop sliding.
8. The packer setting inspection device of claim 1, wherein: the urceolus includes sealing connection's top connection and lower clutch, the lower clutch includes lower clutch extension section and lower clutch main part section, form a step between lower clutch extension section and the lower clutch main part section both, the lower extreme sealing connection of inner tube is in on the lower clutch extension section.
9. The packer setting inspection device of claim 1, wherein: the upper port of the inner cylinder is positioned in the outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811005621.3A CN109186866B (en) | 2018-08-30 | 2018-08-30 | Packer seal testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811005621.3A CN109186866B (en) | 2018-08-30 | 2018-08-30 | Packer seal testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109186866A CN109186866A (en) | 2019-01-11 |
| CN109186866B true CN109186866B (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811005621.3A Active CN109186866B (en) | 2018-08-30 | 2018-08-30 | Packer seal testing device |
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| CN (1) | CN109186866B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646458A (en) * | 2020-12-17 | 2022-06-21 | 中国石油化工股份有限公司 | Device and method for testing performance of downhole packer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201507268U (en) * | 2009-08-28 | 2010-06-16 | 中国石油化工股份有限公司 | Step-by-step sealing detecting device |
| US8727011B2 (en) * | 2009-11-24 | 2014-05-20 | Tam International, Inc. | Wellhead test tool and method |
| CN201593418U (en) * | 2010-01-10 | 2010-09-29 | 蓝鲁哲 | Anti-butting seal-examining device of pipe column |
| CN102507096B (en) * | 2011-10-18 | 2014-02-19 | 中国石油化工股份有限公司 | Seal examining method of packer and seal examining device used in method |
| CN205778704U (en) * | 2016-05-31 | 2016-12-07 | 中国石油集团渤海钻探工程有限公司 | Cross ball stepped setting deblocking compression controllable confining |
| CN206554875U (en) * | 2016-12-13 | 2017-10-13 | 中国石油天然气股份有限公司 | A kind of sliding sleeve of bushing |
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- 2018-08-30 CN CN201811005621.3A patent/CN109186866B/en active Active
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| CN109186866A (en) | 2019-01-11 |
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