CN86206266U - Multifunctional blockage - Google Patents
Multifunctional blockage Download PDFInfo
- Publication number
- CN86206266U CN86206266U CN 86206266 CN86206266U CN86206266U CN 86206266 U CN86206266 U CN 86206266U CN 86206266 CN86206266 CN 86206266 CN 86206266 U CN86206266 U CN 86206266U CN 86206266 U CN86206266 U CN 86206266U
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- CN
- China
- Prior art keywords
- packer
- blockage
- proof
- central tube
- multifunctional
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a multifunctional blockage used in the process of oil-field development. The utility model adopts a floating air-proof coupling mechanism in structure. The floating air-proof coupling mechanism is composed of a floating air-proof upper connecter, a floating air-proof lower connecter, a central tube and a rubber tube. The multifunctional blockage has the advantages of simple structure and nimble conception, and has two blockage performances of a water power pressure difference type and a water power air-proof type. The multifunctional blockage can do various process measures such as stratification water exploration, clamping water, stratification acidification, clogging water, etc. A fuel tube does not need to be raised from a well mouth in the process. The utility model reduces the times of underground working, enhances the effect of the process measures, and is a subsurface tool with wide application.
Description
The utility model is a kind of downhole packer that is used for oilfield development process, and this packer adopts the airtight coupling mechanism that floats.Being mainly used in open hole well carries out in the comprehensive process measures such as layering water detection, Ka Shui, separate layer acid treatment, water blockoff.
To be the carbonate rock oil field in advance under the completion condition, realize the basic tool of hierarchical-development in bore hole with open hole packer.Both at home and abroad the seat envelope of the packer that uses (refer to seal oil pipe and wellbore space, separate oil reservoir up and down) uses all generally that lower slips supports and grappling, and the deblocking of packer (mentioning the oil pipe tubing string) mechanism is rotation and adds the form of putting forward.This class packer construction more complicated, manufacturability is more single.The 671 moldeed depth well open hole packers (nineteen eighty-two was once obtained national fourth class invention award) that latest domestic is succeeded in developing have been widely used in the underground work such as layering water detection, zonal testing, separate zone water shutoff of open hole well.The structure of this packer is the waterpower closed, have locking on the steel body, separate sealing mechanism and airtight valve system, but this packer is not suitable in the underground work of separate layer acid treatment.Be the hydraulic pressuring difference formula on the 472 type bore hole separator structures of developing, be mainly used in the operation of separate layer acid treatment, but the work progress complexity, effect is not good enough yet.Variation along with the oil field subsurface picture, carry out single technological measure in the down-hole and can not adapt to the needs of current oil field development far away, in order on individual well, to carry out the comprehensive process measure, must solve the effect that influences construction owing to frequent kill-job again, improve the technological level of underground work, the utility model is designed a kind of composite type and is used packer more.This packer design very ingenious, structure is very simple, and it has adopted the airtight coupling mechanism that floats, and its purpose is: provide a kind of envelope, deblocking, the flexible movements of heavy seat reliable, easy and simple to handle, and the downhole packer with multiple function.Promptly in the deep-well open hole well, one-trip string just can carry out comprehensive process measures such as layering water detection, Ka Shui, separate layer acid treatment, water blockoff, has overcome the unicity of original packer.
Technical characterictic of the present utility model is:
1. how composite type forms the airtight coupling mechanism that floats with the structure of packer by unsteady upper and lower joint and central tube.
2. the upper design of central tube has the spacing convex shoulder of floating, and the bottom of central tube is provided with inlet opening.15 ° chamfering is arranged on the cylindrical of inlet opening, and its acute angle transition is the circular arc of R15.
3. design has a closed chamber in the unsteady lower contact, and when central tube fluctuated, inlet opening and closed chamber had constituted the airtight holes mechanism of crossing.
Accompanying drawing 1 is the tubing string that composite type uses packer and kit to form more.
Accompanying drawing 2 is that composite type is many with the vertical whole sectional drawing of packer.
Accompanying drawing 3 is enlarged drawings of inlet opening in the accompanying drawing 2 (15).
Packer (5) inserts in the tubing string (1) as can be seen from Figure 1, packer top many with valve (2), safety joint (3), often to close sliding sleeve (4) be the kit that tubing string connects with packer.The packer bottom is ball seat (6).
Reducer union as can be seen from Figure 2 (11) and guide sub (19) are the fittings that connects packer and tubing string.Reducer union (11) is packed into behind the central tube (16), have between reducer union (11) and the positioning sleeve (12) certain unsteady be 90-92mm apart from H, floating seal top connection (14) is housed under the positioning sleeve (12), central tube (16) in the top connection (14) is gone up design a convex shoulder (13), can limit the distance that central tube floats.Because central tube can float, therefore between central tube and pressing plate (22), certain clearance is arranged, pressing plate (22) is used for fixing the capsula interna (21) of packing element (17).The outside of capsula interna (21) is packing element (17).4 inlet openings (15) are arranged at the bottom of central tube (16), and 15 ° chamfering is arranged on the cylindrical of inlet opening, and its acute angle transition is the circular arc of R15.Design has an annular closed chamber (20) in the floating seal lower contact (18), and annular seal space (20) has constituted the airtight holes mechanism of crossing with inlet opening (15), and airtight pressurize has the effect of double seal to the expansion packing element in this mechanism.
One, seat envelope process:
When (1) being applied to the separate layer acid treatment operation, can be used as hydraulic differential pressure set packer and use.The packer tubing string behind predetermined well depth, is thrown the bat of corresponding size down in oil pipe, seat is on the ball seat (6) of packer bottom.Suppress in tubing string on ground, liquid enters from the inlet opening (15) on the central tube (16), by the gap between central tube (16) and the pressing plate (22).Enter capsula interna (21), capsula interna (21) is subjected to compression swelling, and packing element (17) is expanded outwardly, valve on the tubing string (2) breakdown, pressure arrive greatly greater than packing element expansion pressure, packer set like this, reach sealing oil pipe and wellbore annulus, separate the purpose on stratum up and down.
When (2) being applied to composite technology such as layering water detection, acidifying, water blockoff, can be used as hydraulic closed packer and use.During packer set, about 60～the 80cm of upper lifting pipe post, suppress toward oil pipe, the effect of frictionally after packing element expands, tightly be anchored on the bore hole borehole wall, at this moment hold pressure, transfer tubing string, the inlet opening (15) of central tube (16) is in the closed chamber that is displaced downwardly to unsteady lower contact (18) (20).Packer set.
Two, deblocking process:
In the time of need mentioning tubing string, make on the central tube inlet opening (15) and move carrying certain distance on the tubing string, leaving closed chamber (20) packer is deblocking.
Three, heavy seat
Packer is separated the seat envelope of being honored as a queen the once more seat of attaching most importance to.When the mobile stuck point of needs or when carrying out other technological measure, do not need tubing string (1) is proposed well head, at first with the packer deblocking, adjust to new stuck point, carry 60～80cm on the tubing string; (fixed according to depth of setting) suppressed in tubing string, and after packing element expanded, tubing string was transferred in voltage stabilizing, and packer is the seat envelope again.
Claims (5)
1, a kind of downhole packer that has ball seat and packing element, it is characterized in that having between the reducer union (11) of packer and the positioning sleeve (12) one to float apart from (H), the bottom of packer central tube (16) is provided with inlet opening (15), floating seal lower contact (18) is provided with a closed chamber (20), thereby makes this downhole packer constitute the airtight coupling mechanism that floats.
2, downhole packer according to claim 1 is characterized in that unsteady between reducer union and the positioning sleeve is 90～92mm apart from H.
3, downhole packer according to claim 1 and 2 is characterized in that the top of central tube is provided with a unsteady convex shoulder (13).
4, downhole packer according to claim 1 is characterized in that on the cylindrical of central tube bottom inlet opening (15) 15 ° chamfering being arranged, and its acute angle transition is the circular arc of R15.
5, downhole packer according to claim 1 is that feature is that the annular seal space of floating seal lower contact (18) is an annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206266 CN86206266U (en) | 1986-08-30 | 1986-08-30 | Multifunctional blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206266 CN86206266U (en) | 1986-08-30 | 1986-08-30 | Multifunctional blockage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86206266U true CN86206266U (en) | 1988-10-12 |
Family
ID=4808941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86206266 Withdrawn CN86206266U (en) | 1986-08-30 | 1986-08-30 | Multifunctional blockage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86206266U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917598A (en) * | 2015-12-25 | 2017-07-04 | 中国石油天然气股份有限公司 | Acid fracturing string and packing method |
| CN110513072A (en) * | 2019-10-20 | 2019-11-29 | 达坦能源科技（上海）有限公司 | A kind of ultradeep well open hole packer |
-
1986
- 1986-08-30 CN CN 86206266 patent/CN86206266U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917598A (en) * | 2015-12-25 | 2017-07-04 | 中国石油天然气股份有限公司 | Acid fracturing string and packing method |
| CN110513072A (en) * | 2019-10-20 | 2019-11-29 | 达坦能源科技（上海）有限公司 | A kind of ultradeep well open hole packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |