CN212027716U - Throw-in and drag-out type sliding sleeve lock cylinder sealing tool - Google Patents
Throw-in and drag-out type sliding sleeve lock cylinder sealing tool Download PDFInfo
- Publication number
- CN212027716U CN212027716U CN202020694109.0U CN202020694109U CN212027716U CN 212027716 U CN212027716 U CN 212027716U CN 202020694109 U CN202020694109 U CN 202020694109U CN 212027716 U CN212027716 U CN 212027716U
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- Prior art keywords
- hole
- sliding sleeve
- inner core
- locking
- outer sliding
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 title claims abstract description 18
- 241000587161 Gomphocarpus Species 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 6
- 230000004308 accommodation Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a formula sliding sleeve lock core sealing tool can throw and drag for, include: the inner side surface of the outer sliding sleeve is provided with a groove along the axial direction of the outer sliding sleeve, the side surface of the inner core is provided with a through hole along the radial direction of the inner core, one end of the groove is connected with a longitudinal pilot hole, one end of the longitudinal pilot hole is connected to a transverse pilot hole, the side wall of the outer sliding sleeve is also provided with a containing hole along the radial direction of the outer sliding sleeve, a slidable guide disc is arranged in the containing hole, one side of the guide disc is fixedly connected with a locking nail head, and the side wall of the inner core is provided with a locking hole matched with. The utility model discloses utilize the suppressing pressure that intraductal pressure fluid exists to reach the recess through the through-hole to successively through vertical pilot hole and horizontal pilot hole entering accommodation hole, will promote the locking head and remove, lock the head and remove and pin the inner core in the locking hole, utilize the intraductal suppressing pressure to fix inner and outer sliding sleeve relatively so, thereby make fracturing fluid flow keep more stable state.
Description
Technical Field
The utility model relates to a relevant technical field of oil well construction specifically is a formula sliding sleeve lock core sealing tool can throw and drag for.
Background
The sliding sleeve type staged fracturing technology is an important means for unconventional oil and gas resource exploitation, and is widely applied to fracturing yield-increasing transformation of vertical wells, directional wells and horizontal wells of shale gas, low-permeability production layers and thin oil layers.
Currently, sliding sleeves in the prior art include ball-throwing type sliding sleeves, hydraulic sliding sleeves, and mechanical switch type sliding sleeves. The ball throwing type sliding sleeve is usually matched with an open hole packer for use, the outer cylinder of the sliding sleeve is in sliding fit with the core pipe, and a fracturing hole groove is formed in the wall of the outer cylinder of the sliding sleeve. The working principle is that a pressure building ball is put in a wellhead, and when the pressure building ball reaches the position of the sliding sleeve, the pressure building ball and a ball seat in the sliding sleeve form sealing, so that pressure building is realized. When the pressure reaches a certain value, the pin is cut off, and the fracturing hole groove on the outer barrel of the sliding sleeve is opened to establish a fracturing channel. The hydraulic sliding sleeve is usually arranged at the lowest stage of the staged fracturing string, and the working principle of the hydraulic sliding sleeve is that after all open hole packers are set, the hydraulic sliding sleeve continues to be pressed. When the pressure reaches the opening pressure of the hydraulic sliding sleeve, the sliding sleeve is opened, circulation is built inside and outside the sleeve from the opening pressure, and then fracturing construction is carried out. The mechanical switch type sliding sleeve is usually required to be put into a well together with a fracturing string, and is characterized in that the sliding sleeve is opened and closed by a special switch tool without throwing a pressure-holding ball.
Mechanical switch formula sliding sleeve has can throw and drag for the characteristics, and it is when the fracturing, takes place relative movement between overcoat and the inner core and make inside and outside fracturing hole correspond and accessible fracturing fluid, carries out the fracturing operation, nevertheless because intraductal pressure can't keep very stable state, and the inner core lacks firm locking structure, leads to two fracturing holes to be unable to keep stable counterpoint state all the time, causes fracturing fluid flow unstable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can throw formula sliding sleeve lock core sealing tool of salvaging to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a throw-in and drag-out type sliding sleeve lock cylinder sealing tool comprises: the outer sliding sleeve and the inner core are respectively provided with an outer fracturing hole and an inner fracturing hole;
the inner side surface of the outer sliding sleeve is provided with a groove along the axial direction of the outer sliding sleeve, the side surface of the inner core is provided with a through hole along the radial direction of the inner core, one end of the groove is connected with a longitudinal pilot hole, one end of the longitudinal pilot hole is connected with a transverse pilot hole, the transverse pilot hole and the longitudinal pilot hole are mutually vertical, the longitudinal pilot hole and the transverse pilot hole are both positioned in the side wall of the outer sliding sleeve, the side wall of the outer sliding sleeve is also provided with a containing hole along the radial direction of the outer sliding sleeve, one end of the containing hole is provided with a sealing cover in threaded connection with the side wall of the outer sliding sleeve, a slidable guide disc is arranged in the containing hole, one side of the guide disc is.
As a further aspect of the present invention: and a locking pin is arranged in the side wall of the outer sliding sleeve, and one end of the locking pin is embedded in the blind hole in the inner wall of the inner core.
As a further aspect of the present invention: the outer fracturing hole and the inner fracturing hole are in a straight line shape and have the same size.
As a further aspect of the present invention: the distance between the groove and the through hole is equal to the distance between the outer fracturing hole and the inner fracturing hole.
As a further aspect of the present invention: the distance between the locking hole and the locking nail head is equal to the distance between the groove and the through hole.
As a further aspect of the present invention: the end face of the locking nail head is conical, and the included angle between the side face of the cone and the horizontal plane is at least 135 degrees.
As a further aspect of the present invention: and one side of the lock pin head is positioned in the side wall of the accommodating hole and is also provided with a pressure spring.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the suppressing pressure that utilizes intraductal pressure fluid to exist reaches the recess through the through-hole to successively get into the accommodation hole through vertical pilot hole and horizontal pilot hole, to the guide disc production pressure, will promote the locking head to remove, the locking head removes and locks the inner core in the locking hole, utilizes intraductal suppressing pressure to fix inner and outer sliding sleeve relatively like this, makes the fracturing hole size keep unchangeable, thereby makes fracturing fluid flow keep more stable state; when the locking head is locked, the pressure spring is compressed, the pressure in the pipe disappears after fracturing operation, and the pressure spring pushes the locking head to reset to release locking.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, in an embodiment of the present invention, a retrievable sliding sleeve lock cylinder sealing tool includes: the outer sliding sleeve 1 and the inner core 2, the inner core 2 is movably arranged in the outer sliding sleeve 1, the outer sliding sleeve 1 and the inner core 2 are respectively provided with an outer fracturing hole 11 and an inner fracturing hole 21, the outer fracturing hole 11 and the inner fracturing hole 21 are in a straight shape and have the same size, and when pressure liquid is not introduced into the oil well pipe at an initial position, the outer fracturing hole 11 and the inner fracturing hole 21 are separated by a certain distance and are not communicated;
be provided with locking pin 3 in the 1 lateral wall of outer sliding sleeve, in the blind hole of locking pin 3 one end embedding in inner core 2 inner wall, locking pin 3 is used for locking the internal and external sliding sleeve fixedly under initial condition.
The inner side surface of the outer sliding sleeve 1 is provided with a groove 12 along the axial direction, the side surface of the inner core 2 is provided with a through hole 22 along the radial direction, the distance between the groove 12 and the through hole 22 at the initial position is equal to the distance between the outer fracturing hole 11 and the inner fracturing hole 21, one end of the groove 12 is connected with a longitudinal pilot hole 13, one end of the longitudinal pilot hole 13 is connected with a transverse pilot hole 14, the transverse pilot hole 14 and the longitudinal pilot hole 13 are vertical to each other, the longitudinal pilot hole 13 and the transverse pilot hole 14 are both positioned in the side wall of the outer sliding sleeve 1, the side wall of the outer sliding sleeve 1 is also provided with a containing hole 15 along the radial direction, one end of the containing hole 15 is provided with a sealing cover 5 in threaded connection with the side wall of the outer sliding sleeve 1, a slidable guide disc 6 is arranged in the containing hole 15, one side of the guide disc 6 is fixedly connected with a locking head 8, the end surface of, a pressure spring 7 is further arranged on one side of the lock nail head 8 and located in the side wall of the accommodating hole 15, a locking hole 23 matched with the lock nail head 8 in shape is formed in the side wall of the inner core 2, and in an initial state, a certain distance is formed between the locking hole 23 and the lock nail head 8 and is equal to the distance between the groove 12 and the through hole 22.
After pressure liquid is injected into the sliding sleeve, under the action of pressure, the inner core 2 generates a tendency of sliding relative to the outer sliding sleeve 1, shearing force is generated on the locking pin 3, the inner core 2 slides relative to the sliding sleeve 1 after being sheared, and moves to a position where the outer fracturing hole 11 and the inner fracturing hole 21 coincide, the fracturing holes are communicated after being in place, fracturing operation can be performed, meanwhile, in the position, the through hole 22 moves to one end position of the groove 12, the pressure building-out pressure of the pressure liquid in the pipe reaches the groove 12 through the through hole 22 and enters the accommodating hole 15 through the longitudinal pilot hole 13 and the transverse pilot hole 14 in sequence, pressure is generated on the guide disc 6, the locking head 8 is pushed to move, the locking head 8 moves into the locking hole 23 to lock the inner core 2, so that the inner sliding sleeve and the outer sliding sleeve are relatively fixed by the pressure building-out in the pipe, and the size of the fracturing; when the locking head 8 is locked, the pressure spring 7 is compressed under pressure, the internal pressure of the pipe disappears after fracturing operation, the pressure spring 7 pushes the locking head 8 to reset to release locking, and the conical shapes of the locking head 8 and the locking hole 23 prevent self-locking and prevent locking from being released.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A throw-in and drag-out type sliding sleeve lock cylinder sealing tool comprises: the outer sliding sleeve (1) and the inner core (2), the inner core (2) is movably arranged in the outer sliding sleeve (1), and the outer sliding sleeve (1) and the inner core (2) are respectively provided with an outer fracturing hole (11) and an inner fracturing hole (21);
the method is characterized in that: the inner side surface of the outer sliding sleeve (1) is provided with a groove (12) along the axial direction thereof, the side surface of the inner core (2) is provided with a through hole (22) along the radial direction thereof, one end of the groove (12) is connected with a longitudinal pilot hole (13), one end of the longitudinal pilot hole (13) is connected with a transverse pilot hole (14), the transverse pilot hole (14) and the longitudinal pilot hole (13) are vertical to each other, the longitudinal pilot hole (13) and the transverse pilot hole (14) are both positioned in the side wall of the outer sliding sleeve (1), the side wall of the outer sliding sleeve (1) is also provided with a containing hole (15) along the radial direction, one end of the accommodating hole (15) is provided with a sealing cover (5) in threaded connection with the side wall of the outer sliding sleeve (1), a slidable guide disc (6) is arranged in the accommodating hole (15), one side of the guide disc (6) is fixedly connected with a lock pin head (8), and a locking hole (23) matched with the lock pin head (8) in shape is formed in the side wall of the inner core (2).
2. The retrievable sliding sleeve lock cylinder sealing tool according to claim 1, wherein: and a locking pin (3) is arranged in the side wall of the outer sliding sleeve (1), and one end of the locking pin (3) is embedded in a blind hole in the inner wall of the inner core (2).
3. The retrievable sliding sleeve lock cylinder sealing tool according to claim 1, wherein: the outer fracturing hole (11) and the inner fracturing hole (21) are in a straight line shape and have the same size.
4. The retrievable sliding sleeve lock cylinder sealing tool according to claim 3, wherein: the distance between the groove (12) and the through hole (22) is equal to the distance between the outer fracturing hole (11) and the inner fracturing hole (21).
5. The retrievable sliding sleeve lock cylinder sealing tool according to claim 4, wherein: the distance between the locking hole (23) and the locking nail head (8) is equal to the distance between the groove (12) and the through hole (22).
6. The retrievable sliding sleeve lock cylinder sealing tool according to claim 1, wherein: the end face of the lock nail head (8) is conical, and the included angle between the side face of the cone and the horizontal plane is at least 135 degrees.
7. The retrievable sliding sleeve lock cylinder sealing tool according to claim 1 or 6, wherein: and a pressure spring (7) is also arranged on one side of the lock pin head (8) in the side wall of the accommodating hole (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020694109.0U CN212027716U (en) | 2020-04-29 | 2020-04-29 | Throw-in and drag-out type sliding sleeve lock cylinder sealing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020694109.0U CN212027716U (en) | 2020-04-29 | 2020-04-29 | Throw-in and drag-out type sliding sleeve lock cylinder sealing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212027716U true CN212027716U (en) | 2020-11-27 |
Family
ID=73496132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020694109.0U Expired - Fee Related CN212027716U (en) | 2020-04-29 | 2020-04-29 | Throw-in and drag-out type sliding sleeve lock cylinder sealing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212027716U (en) |
-
2020
- 2020-04-29 CN CN202020694109.0U patent/CN212027716U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201127 |