CN104912514B - Anti-stopping excluder - Google Patents
Anti-stopping excluder Download PDFInfo
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- CN104912514B CN104912514B CN201510350980.2A CN201510350980A CN104912514B CN 104912514 B CN104912514 B CN 104912514B CN 201510350980 A CN201510350980 A CN 201510350980A CN 104912514 B CN104912514 B CN 104912514B
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- central tube
- pipe
- heart pipe
- packing element
- seal head
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Abstract
The invention discloses a kind of Anti-stopping excluder, it includes central tube, anti-sand core pipe and upper and lower connector, and the crack top of anti-sand core pipe and central tube is equipped with sealing ring；It is cased with sliding heart pipe outside central tube, slip heart pipe is wrapped with packing element, slides heart pipe both ends and is provided with upper and lower seal head, slip heart pipe, packing element and upper and lower seal head form mobile entirety, and mobile entirety can be free to slide on central tube；The first pressure transmission hole is equipped with the middle part of central tube, heart pipe outer wall is slided and is equipped with the second pressure transmission hole, being formed between central tube and slip heart pipe has pressure transmission passage.The power of string creep is offset by the movement between slip heart pipe and central tube during pressure break, and packing element will not be moved with casing, will not damage packing element, sealed reliable, crack sand controlling result between central tube and anti-sand core pipe is good, and sand will not enter packing element, and packing element is easily shunk；In addition Anti-stopping excluder of the invention easily unseals, simple in structure, of low cost.
Description
Technical field
The present invention relates to a kind of downhole tool of oil-gas field development application, especially a kind of Anti-stopping excluder.
Background technology
In fracturing process, using packer protection sleeve pipe or realize that separate stratum fracfturing is very universal, but existing packing
The problem of easily there is sand card after device pressure break and can not unsealing., there are the several of sand card in the particularly oil well of packer layered pressure break
Rate is very high, seriously affected fractured well production cycle and pressure after yield.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of simple in structure, sealed reliable, easily deblocking and sand control capability
Superior Anti-stopping excluder.
In order to solve the above-mentioned technical problem, the present invention includes central tube, anti-sand core pipe and installed in central tube both ends
Top connection and lower contact, inside the anti-centrally disposed pipe of sand core pipe, the difference of the inner diameter of centerpipe and anti-sand core pipe outside diameter
Less than 0.1mm, the top of the crack between anti-the sand core pipe and central tube is additionally provided with sealing ring；
A slip heart pipe is set with the center pipe outer wall, one is enclosed with the slip heart pipe outer wall with sliding heart pipe etc.
Long packing element, the both ends for sliding heart pipe are separately installed with seal head and lower seal head, seal head and lower seal head on this
For sealing shroud in the pipe outer wall of center, slip heart pipe, packing element and the upper and lower seal head constitute a mobile entirety respectively,
The movement integrally can be free to slide in the center pipe outer wall between upper and lower connector；
Through the first pressure transmission hole is equipped with the middle part of the center pipe outer wall, run through in the slip heart pipe outer wall and passed equipped with second
Hole is pressed, the pressure transmission that the gap between the central tube and slip heart pipe constitutes connection the first pressure transmission hole and the second pressure transmission hole is led to
Road.
The upper seal head and lower seal head are realized by sealing ring and center pipe outer wall to be sealed.
The beneficial effects of the invention are as follows：The power of string creep is supported by the movement between slip heart pipe and central tube during pressure break
Disappear, packing element will not be moved with casing, will not damage packing element, sealed reliable, and the crack between central tube and anti-sand core pipe is prevented
Sand effect is good, and sand will not enter packing element, and packing element is easily shunk；In addition Anti-stopping excluder of the invention easily unseals, structure letter
It is single, it is of low cost.
Brief description of the drawings
Fig. 1 is the structure diagram of Anti-stopping excluder of the present invention.
Embodiment
The Anti-stopping excluder of the present invention is mainly used in protection sleeve pipe or separate stratum fracfturing in pressing crack construction, utilizes central tube
The effect of filtering sand is realized while crack between anti-sand core pipe can transmit fluid pressure, come reach only liquid into
Enter to expand packing element expansion and prevent sand from entering the purpose of packing element, solve the asking of not unsealing of packer caused by sand enters packing element
Topic.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments：
Referring to Fig. 1, Anti-stopping excluder of the invention includes central tube 2, anti-sand core pipe 10 and installed in 2 both ends of central tube
Top connection 1 and lower contact 9, inside the anti-centrally disposed pipe 2 of sand core pipe 10,2 internal diameter of central tube and anti-sand core pipe
The difference of 10 outside diameters is less than 0.1mm, and the top of the crack between anti-the sand core pipe 10 and central tube 2 is additionally provided with sealing ring, the sealing
The effect of circle be in order to prevent liquid between anti-sand core pipe 10 and central tube 2 in crack from continuing uplink, for the installation of sealing ring,
Anti- 10 top outside diameter of sand core pipe is slightly larger and 2 upper inner diameter of central tube is also slightly larger.
A slip heart pipe 4 is set with 2 outer wall of central tube, one is set with 4 outer wall of slip heart pipe with sliding the heart
The isometric packing element 6 of pipe 4, packing element 6, which is wrapped up and sealed, slides heart pipe 4, and the both ends for sliding heart pipe 4 are separately installed with seal head
3 and lower seal head 8, the upper seal head 3 and lower seal head 8 difference sealing shroud are on 2 outer wall of central tube, seal head 3 on this
Realized and sealed by sealing ring and 2 outer wall of central tube with lower seal head 8, the slip heart pipe 4, packing element 6,3 and of upper seal head
Lower seal head 8 constitutes mobile overall, 2 outer wall of central tube which integrally can be between top connection 1 and lower contact 9
It is upper free to slide.Wherein the outside diameter of top connection 1 and lower contact 9 is more than central tube 2, and the length for sliding heart pipe 4 is less than central tube 2,
It can ensure that slide heart pipe 4 slides between top connection 1 and lower contact 9.
Through the first pressure transmission hole 7 is equipped with the middle part of 2 outer wall of central tube, run through on 4 outer wall of slip heart pipe equipped with the
Two pressure transmission holes 5, the central tube 2 and the gap slided between heart pipe 4 constitute the first pressure transmission hole 7 of connection and the second pressure transmission hole 5
Pressure transmission passage.
The packer of the present invention needs to coordinate flow controller to use, and flow controller is typically mounted at packer bottom, when liquid passes through
Cross when being flowed out inside packer from flow controller, the fluid pressure inside packer is higher than external pressure, and liquid can be acted in pressure
The lower tiny crack by between central tube 2 and anti-sand core pipe 10, by the first pressure transmission hole 7, into slip heart pipe 4 and center
Pressure transmission passage between pipe 2, the inside of packing element 6 is being entered by the second pressure transmission hole 5, packing element 6 is swollen under the action of fluid pressure
It is swollen, and seal oil sets annular space.Crack can allow liquid by hindering sand etc. between central tube 2 and anti-sand core pipe 10
Solid passes through.After liquid stops flowing, the liquid inside packing element 6 enters central tube 2, and packing element 6 is shunk, removing seal for packer, oil jacket
Annular space connects up and down.
In conclusion present disclosure is not limited in the above embodiments, those skilled in the art can be
It is proposed other embodiments within the technological guidance's thought of the present invention, but these embodiments be included in the scope of the present invention it
It is interior.
Claims (2)
- A kind of 1. Anti-stopping excluder, it is characterised in that：Including central tube (2), anti-sand core pipe (10) and installed in central tube (2) The top connection (1) and lower contact (9) at both ends, the centrally disposed pipe of the anti-sand core pipe (10) (2) is internal, the central tube (2) The difference of internal diameter and anti-sand core pipe (10) outside diameter is less than 0.1mm, the top of the crack between the anti-sand core pipe (10) and central tube (2) It is additionally provided with sealing ring；A slip heart pipe (4) is set with central tube (2) outer wall, one is enclosed with slip heart pipe (4) outer wall with sliding The isometric packing element (6) of heart pipe (4), the both ends for sliding heart pipe (4) are separately installed with seal head (3) and lower seal head (8), Sealing shroud is on central tube (2) outer wall respectively for seal head (3) and lower seal head (8) on this, the slip heart pipe (4), packing element (6) and upper and lower seal head (3,8) constitutes a mobile entirety, which integrally can be between upper and lower connector (1,9) It is free to slide on central tube (2) outer wall；Through the first pressure transmission hole (7) is equipped with the middle part of central tube (2) outer wall, run through on described slip heart pipe (4) outer wall and be equipped with Second pressure transmission hole (5), the central tube (2) and the gap slided between heart pipe (4) constitute the first pressure transmission hole of connection (7) and the The pressure transmission passage of two pressure transmission holes (5).
- 2. Anti-stopping excluder described in accordance with the claim 1, it is characterised in that：The upper seal head (3) and lower seal head (8) are equal Realized and sealed 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 CN104912514A (en) | 2015-09-16 |
| CN104912514B true 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 |
|---|---|
| CN (1) | CN104912514B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014354B (en) * | 2016-06-21 | 2018-09-18 | 陕西汇丰悦石油科技开发有限公司 | A kind of no slips automatic drain flow controller |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104912514A (en) | 2015-09-16 |
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| TR01 | Transfer of patent right |
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 |