CN104912514A - Anti-blocking packer - Google Patents
Anti-blocking packer Download PDFInfo
- Publication number
- CN104912514A CN104912514A CN201510350980.2A CN201510350980A CN104912514A CN 104912514 A CN104912514 A CN 104912514A CN 201510350980 A CN201510350980 A CN 201510350980A CN 104912514 A CN104912514 A CN 104912514A
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- China
- Prior art keywords
- center pipe
- central tube
- core barrel
- wall
- seal head
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Abstract
The invention discloses an anti-blocking packer, which comprises a center pipe, a sand prevention center pipe, an upper joint and a lower joint, wherein the upper part of a seam between the sand prevention center pipe and the center pipe is provided with a sealing ring; a sliding center pipe is arranged outside the center pipe in a sleeving way; a rubber tube is wrapped outside the sliding center pipe; an upper sealing head and a lower sealing head are arranged at the two ends of the sliding center pipe; the sliding center pipe, the rubber tube, the upper sealing head and the lower sealing head form a movable whole; the movable whole can freely slide on the center pipe; the middle part of the center pipe is provided with a first pressure transfer hole; a second pressure transfer hole is formed in the outer wall of the sliding center pipe; and a pressure transfer passage is formed between the center pipe and the sliding center pipe. During the fracturing, the peristaltic force of a pipe column is counteracted by the motion between the sliding center pipe and the center pipe; the rubber tube and a sleeve cannot move; the rubber tube cannot be damaged; the sealing is reliable; the seam between the center pipe and the sand prevention center pipe achieves a good sand prevention effect, so that sand cannot enter the rubber tube; and the rubber tube can easily contract. The anti-blocking packer has the advantages that the deblocking is easy; the structure is simple; and the cost is low.
Description
Technical field
The present invention relates to the downhole tool of a kind of oil-gas field development application, especially a kind of Anti-stopping excluder.
Background technology
In fracturing process, utilize packer protective casing or realize separate stratum fracfturing very general, but easily occur sand card after existing packer pressure break and cannot the problem of deblocking.The particularly oil well of packer layered pressure break, occurs that the probability of sand card is very high, has had a strong impact on production cycle and the rear output of pressure of fractured well.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of structure is simple, sealing is reliable, easily deblocking and the superior Anti-stopping excluder of sand control capability.
In order to solve the problems of the technologies described above, the present invention includes central tube, sand control core barrel and be arranged on top connection and the lower contact at central tube two ends, described sand control core barrel is arranged on central tube inside, the difference of described inner diameter of centerpipe and sand control core barrel external diameter is less than 0.1mm, and the top of the crack between this sand control core barrel and central tube is also provided with sealing ring;
Described central tube outer wall is set with a slip core barrel, this slip core barrel outer wall is enclosed with a packing element isometric with slip core barrel, the two ends of described slip core barrel are separately installed with seal head and lower seal head, on this seal head and lower seal head respectively sealing shroud be contained on central tube outer wall, described slip core barrel, packing element and upper and lower seal head constitute a mobile entirety, and this moves entirety and can the central tube outer wall between upper and lower joint be free to slide;
Run through in the middle part of described central tube outer wall and be provided with the first pressure transmission hole, described slip core barrel outer wall runs through being provided with the second pressure transmission hole, the gap between described central tube and slip core barrel constitutes the pressure transmission passage of connection first pressure transmission hole and the second pressure transmission hole.
Described upper seal head and lower seal head all realize sealing by sealing ring and central tube outer wall.
The invention has the beneficial effects as follows: during pressure break, the power of string creep is offset by the movement of sliding between core barrel and central tube, packing element and sleeve pipe can not be moved, packing element can not be damaged, sealing is reliable, crack sand controlling result between central tube and sand control core barrel is good, sand can not enter packing element, and packing element easily shrinks; The easy deblocking of Anti-stopping excluder of the present invention in addition, structure is simple, with low cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of Anti-stopping excluder of the present invention.
Detailed description of the invention
Anti-stopping excluder of the present invention is mainly used in protective casing or separate stratum fracfturing in pressing crack construction; utilize the crack between central tube and sand control core barrel can realize filtering the effect of sand while transmit fluid pressure; reach and only have liquid to enter expansion packing element to expand and stop sand to enter the object of packing element, solving because sand enters the problem that packing element causes packer not deblocking.
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
See Fig. 1, Anti-stopping excluder of the present invention comprises central tube 2, sand control core barrel 10 and be arranged on top connection 1 and the lower contact 9 at central tube 2 two ends, it is inner that described sand control core barrel 10 is arranged on central tube 2, the difference of described central tube 2 internal diameter and sand control core barrel 10 external diameter is less than 0.1mm, the top of the crack between this sand control core barrel 10 and central tube 2 is also provided with sealing ring, the effect of sealing circle is up in order to stop the liquid between sand control core barrel 10 and central tube 2 in crack to continue, in order to the installation of sealing ring, sand control core barrel 10 top external diameter is slightly large and central tube 2 upper inner diameter is also slightly large.
Described central tube 2 outer wall is set with a slip core barrel 4, this slip core barrel 4 outer wall is set with a packing element 6 isometric with slip core barrel 4, packing element 6 wraps up and seals slip core barrel 4, the two ends of described slip core barrel 4 are separately installed with seal head 3 and lower seal head 8, described upper seal head 3 and lower seal head 8 respectively sealing shroud are contained on central tube 2 outer wall, on this, seal head 3 and lower seal head 8 all realize sealing by sealing ring and central tube 2 outer wall, described slip core barrel 4, packing element 6, upper seal head 3 and lower seal head 8 constitute a mobile entirety, this moves entirety and can central tube 2 outer wall between top connection 1 and lower contact 9 be free to slide.Wherein the external diameter of top connection 1 and lower contact 9 is greater than central tube 2, and the length of slip core barrel 4 is less than central tube 2, can ensure that slip core barrel 4 slides between top connection 1 and lower contact 9.
Run through in the middle part of described central tube 2 outer wall and be provided with the first pressure transmission hole 7, described slip core barrel 4 outer wall runs through being provided with the second pressure transmission hole 5, the gap between described central tube 2 and slip core barrel 4 constitutes the pressure transmission passage of connection first pressure transmission hole 7 and the second pressure transmission hole 5.
Packer of the present invention needs to coordinate restriction choke to use, restriction choke is generally arranged on bottom packer, when liquid flows out from restriction choke through packer inside, the fluid pressure of packer inside is higher than external pressure, liquid can tiny crack under pressure between central tube 2 and sand control core barrel 10, through the first pressure transmission hole 7, enter the pressure transmission passage between slip core barrel 4 and central tube 2, the inside of packing element 6 is being entered through the second pressure transmission hole 5, packing element 6 expands under the effect of fluid pressure, and seals oil sets annular space.Between central tube 2 and sand control core barrel 10, crack can allow liquid to pass through, and hinders the solids such as sand to pass through.After liquid stops flowing, the liquid of packing element 6 inside enters central tube 2, and packing element 6 shrinks, removing seal for packer, and oil sets annular space is communicated with up and down.
In sum, content of the present invention is not limited in the above-described embodiment, and those skilled in the art can propose other embodiment within technological guidance's thought of the present invention, but these embodiments all comprise within the scope of the present invention.
Claims (2)
1. an Anti-stopping excluder, it is characterized in that: comprise central tube (2), sand control core barrel (10) and be arranged on top connection (1) and the lower contact (9) at central tube (2) two ends, it is inner that described sand control core barrel (10) is arranged on central tube (2), the difference of described central tube (2) internal diameter and sand control core barrel (10) external diameter is less than 0.1mm, and the top of the crack between this sand control core barrel (10) and central tube (2) is also provided with sealing ring;
Described central tube (2) outer wall is set with a slip core barrel (4), this slip core barrel (4) outer wall is enclosed with a packing element (6) isometric with slip core barrel (4), the two ends of described slip core barrel (4) are separately installed with seal head (3) and lower seal head (8), on this seal head (3) and lower seal head (8) respectively sealing shroud be contained on central tube (2) outer wall, described slip core barrel (4), packing element (6) and upper, lower seal head (3, 8) a mobile entirety is constituted, this moves entirety can upper, lower contact (1, 9) central tube (2) outer wall between is free to slide,
Run through in the middle part of described central tube (2) outer wall and be provided with the first pressure transmission hole (7), described slip core barrel (4) outer wall runs through and is provided with the second pressure transmission hole (5), the gap between described central tube (2) and slip core barrel (4) constitutes the pressure transmission passage of connection first pressure transmission hole (7) and the second pressure transmission hole (5).
2. according to Anti-stopping excluder according to claim 1, it is characterized in that: described upper seal head (3) and lower seal head (8) all realize sealing by sealing ring and central tube (2) outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510350980.2A CN104912514B (en) | 2015-06-23 | 2015-06-23 | Anti-stopping excluder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510350980.2A CN104912514B (en) | 2015-06-23 | 2015-06-23 | Anti-stopping excluder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104912514A true CN104912514A (en) | 2015-09-16 |
| CN104912514B CN104912514B (en) | 2018-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510350980.2A Active CN104912514B (en) | 2015-06-23 | 2015-06-23 | Anti-stopping excluder |
Country Status (1)
| Country | Link |
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| CN (1) | CN104912514B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014354A (en) * | 2016-06-21 | 2016-10-12 | 陕西汇丰悦石油科技开发有限公司 | Cava-free automatic liquid drainage throttle device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2828823A (en) * | 1955-07-07 | 1958-04-01 | Exxon Research Engineering Co | Reinforced inflatable packer |
| CN201943649U (en) * | 2011-03-09 | 2011-08-24 | 毛元红 | High pressure fracture long glue cylinder packer |
| CN103764942A (en) * | 2011-09-13 | 2014-04-30 | 韦尔泰克有限公司 | Annular barrier with axial force mechanism |
| CN204200161U (en) * | 2014-07-21 | 2015-03-11 | 扬州诚创石油机械有限公司 | A kind of Bidirectional pressure expanding external packer of pipe |
-
2015
- 2015-06-23 CN CN201510350980.2A patent/CN104912514B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2828823A (en) * | 1955-07-07 | 1958-04-01 | Exxon Research Engineering Co | Reinforced inflatable packer |
| CN201943649U (en) * | 2011-03-09 | 2011-08-24 | 毛元红 | High pressure fracture long glue cylinder packer |
| CN103764942A (en) * | 2011-09-13 | 2014-04-30 | 韦尔泰克有限公司 | Annular barrier with axial force mechanism |
| CN204200161U (en) * | 2014-07-21 | 2015-03-11 | 扬州诚创石油机械有限公司 | A kind of Bidirectional pressure expanding external packer of pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014354A (en) * | 2016-06-21 | 2016-10-12 | 陕西汇丰悦石油科技开发有限公司 | Cava-free automatic liquid drainage throttle device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104912514B (en) | 2018-05-04 |
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Effective date of registration: 20210302 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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| TR01 | Transfer of patent right |