CN2816342Y - Cement-filling type packer - Google Patents
Cement-filling type packer Download PDFInfo
- Publication number
- CN2816342Y CN2816342Y CN 200520110270 CN200520110270U CN2816342Y CN 2816342 Y CN2816342 Y CN 2816342Y CN 200520110270 CN200520110270 CN 200520110270 CN 200520110270 U CN200520110270 U CN 200520110270U CN 2816342 Y CN2816342 Y CN 2816342Y
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- China
- Prior art keywords
- packing element
- lamination
- adhesive barrel
- barrel
- adhesive
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- Expired - Lifetime
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model relates to a cement-filling type packer which is composed of an upper short joint, a central tube, overlapping sheets, an adhesive barrel, connecting heads of an adhesive barrel, a valve connecting head, a lower short joint, etc. The utility model is characterized in that the length of the adhesive barrel ranges from two to eleven meters; the outer diameter of the adhesive barrel ranges from 100 to 210 millimeters, and the thickness of the adhesive barrel ranges from five to twenty-five millimeters. Both end parts of the adhesive barrel have a double barrel structure of which the center is provided with the upper overlapping sheet and the lower overlapping sheet respectively. The length of the upper overlapping sheet and the lower overlapping sheet ranges from 550 to 1000 millimeters. The structure of the upper and the lower overlapping sheets is used so that the traditional method of a single overlapping sheet is broken through. The maximum swell diameter of the adhesive barrel of the utility model can be four times the initial diameter of the adhesive barrel, and the swelled adhesive barrel is tightly attached to a well wall so as to improve cementing quality. The structure of the long adhesive barrel is used; thereby, strata can be sealed and isolated, and a well section within 11 meters can also be directly plugged.
Description
Technical field
The utility model relates to oil field downhole packer technical field, is a kind of external casing packer, particularly a kind of cement filling type packer.In the well cementation process, cementing slurry injects between packer central tube and the packing element annular space and in the annular space solidified inside, realizes the effect of packing stratum.The utility model is fit to be applied to irregular than long well section shutoff well cementing operation, has better practicability.
Background technology
The cement the well external casing packer of on-the-spot widespread usage of petroleum oil well completion is a hydraulic expansion formula packer.Form by last pipe nipple, central tube, lamination, packing element, valve union, following pipe nipple etc.During well cementing operation, packer is sent into the down-hole,,, packing element is expanded for annular space between central tube and the packing element injects highly pressurised liquid by the liquid inlet control valve in the valve union.Packing element is close to the borehole wall after expanding, and reaches the purpose on packing stratum.Then, cement injection in packer top or bottom annular space is finished well cementation work after cement paste solidifies.At present, occur cement injection technology in a kind of directly past packer again, make packing element expand the operational method that cement paste solidifies in the packing element annular space.This cementing method can be finished packing stratum and well cementation task simultaneously.Employed packer construction is in the inside of elastic metallic lamination, outside packing element to be arranged, and promptly adopts the continuous metal lamination.The continuous metal lamination is inside and outside have respectively in packing element and outside packing element, the continuous metal lamination is as the skeleton of packing element.Because this continuous metal skeleton elastic strength is big, the packing element after the expansion can not closely be attached on the irregular borehole wall; Because 2.5 meters of the curtailments of metallic framework and packing element, when needing the packing well section to surpass 3 meters the irregular borehole wall, the continuous metal lamination can not satisfy the well cementation requirement as the packer of packing element skeleton again.The Chinese patent publication number is 2532232 patent, discloses a kind of external packer of pipe.The packing element structure that it adopts is exactly to be made up of the inside and outside packing element that accompanies metallic laminations.
Summary of the invention
The purpose of this utility model is: a kind of cement filling type packer is provided, it is big to overcome original packer continuous metal skeleton elastic strength, packing element can not closely be attached to the deficiency on the irregular borehole wall, overcomes continuous metal skeleton packer and can not be applied to the deficiency that the packing well section surpasses 3 meters.Change the packing element structure, prolong packer shutoff well segment length; Under borehole wall irregular conditions, the packing element and the borehole wall after the expansion closely attach, and improve cementing quality.
The technical scheme in the invention for solving the technical problem is: be made up of last pipe nipple, central tube, lamination, packing element, packing element joint, valve union, following pipe nipple etc.Be threaded central tube upper end of last pipe nipple, the central tube lower end connects valve union and following pipe nipple.Liquid inlet control valve is arranged in the valve union.It is characterized in that: the length of packing element is between the 2-11 rice, and the external diameter of packing element is between the 100-210 millimeter, and the thickness of packing element is between the 5-25 millimeter.The both ends of packing element are double-barrel structure, and last lamination and following lamination are arranged respectively in the middle of the double-barrel structure of two ends.The length of last lamination and following lamination is between the 550-1000 millimeter.The mode that upper and lower lamination connects the packing element joint is identical with original technology.
The beneficial effects of the utility model are: the utility model adopts upper and lower lamination, has broken traditional single continuous lamination way, and it is big to have overcome the single continuous lamination intensity of original packer, the well cementation hydraulic coupling attaching borehole wall that packing element fully can not be expanded.The utility model packing element maximum swelling diameter can reach 4 times of initial packing element diameter, and original packer only can expand 25%.Closely attach with the borehole wall after packing element expands,, be commonly called as pregnant well section even under borehole wall irregular conditions, equally that borehole wall shutoff is tight, can improve cementing quality.Adopt the upper and lower lamination of long packing element type, the effect of packing stratum is not only arranged, directly 11 meters of shutoff are with interior well section.Existing packer can only shutoff 2.5 meters with interior well section.The utility model has been received beyond thought effect, because the packing element effective length increases, makes the original technology of seat envelope force rate of this utility model improve 1.3-7.3 doubly, reduces the caused packer slide displacement of tubing string weight in the well cementation process.
Description of drawings
Accompanying drawing is the cross-sectional view of the utility model cement filling type packer.In the middle of clearly expressing packing element (6) the two ends double-barrel structure and the bitubular upper and lower lamination (5) (7) is arranged respectively.Because packing element (6) and central tube (2) are longer, adopt the two ends of two chain line intercepting packing elements (6) and central tube (2) among the figure, the intermediate portion is not represented.Spool part in the valve union (10) does not belong to characteristic of the present utility model, not expression.
Among the figure, 1. go up pipe nipple, 2. central tube, 3. packing element top connection, 4. lock ring on the packing element is 5. gone up lamination, and 6. packing element 7. descends lamination, 8. packing element lower contact, 9. lock ring under the packing element, 10 valve unions, 11. lower contacts.
The specific embodiment
As figure, be that 114 millimeters cement filling type packer is an example with a central tube (2) external diameter, further specify.The inner taper pipe thread that adopts in last pipe nipple (1) two ends.Last pipe nipple (1) connects central tube (2) upper end.Central tube (2) length is 10 meters.Central tube (2) lower end connects valve union (10) and following pipe nipple (11).Packing element top connection (3) is fixed on pipe nipple (1) bottom, and packing element lower contact (8) is fixed on down pipe nipple (11) top.The length of packing element (6) is 9 meters, and the external diameter of packing element (6) is 138 millimeters, and the thickness of packing element (6) is 12 millimeters.The both ends of packing element (6) are double-barrel structure, and described two ends double-barrel structure just is divided into bilayer in packing element (6) two ends.Lamination (5) and following lamination (7) in the middle of the bitubular of two ends, inserting respectively.Last lamination (5) and following lamination (7) length are 650 millimeters.The length of last lamination (5) and following lamination (7) can be unequal.Lock ring (4) is fixed on top connection (3) inwall with packing element (6) internal layer on the employing packing element; Following lock ring (9) is fixed on lower contact (8) inwall with packing element (6) internal layer.The mode that upper and lower lamination (5) (7) connects packing element joint (3) (8) is identical with original technology, is not described in detail.Liquid inlet control valve on the valve union (10) can adopt the prior art liquid inlet control valve, or the liquid inlet control valve in the patent axial self-locking valve formula packer of employing our company application.
After the utility model is succeeded in developing, on probation in 12 mouthfuls of oil wells, reached designing requirement.Cement paste enters packing element (6), and packing element (6) expands and the borehole wall attaches closely, and cement paste solidifies in packing element (6), and 12 mouthfuls of well cementing qualities are all qualified.10.5 meters of directly effective plugged well sections.
Claims (2)
1, a kind of cement filling type packer, be mainly used in the well cementation process, it is characterized in that: by last pipe nipple (1), central tube (2), lamination (5) (7), packing element (6), packing element joint (3) (8), valve union (1), following pipe nipple (11) is formed, last pipe nipple (1) is threaded on the central tube (2), central tube (2) lower end connects valve union (10) and following pipe nipple (11), it is characterized in that: the length of packing element (6) is between the 2-11 rice, the external diameter of packing element (6) is between the 100-210 millimeter, the thickness of packing element (6) is between the 5-25 millimeter, the both ends of packing element (6) are double-barrel structure, in the middle of the double-barrel structure last lamination (5) and following lamination (7) are arranged respectively, the length of last lamination (5) and following lamination (7) is between the 550-1000 millimeter.
2, according to claims 1 described cement filling type packer, it is characterized in that: it is unequal with following lamination (7) length to go up lamination (5) length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520110270 CN2816342Y (en) | 2005-06-20 | 2005-06-20 | Cement-filling type packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520110270 CN2816342Y (en) | 2005-06-20 | 2005-06-20 | Cement-filling type packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2816342Y true CN2816342Y (en) | 2006-09-13 |
Family
ID=36996150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520110270 Expired - Lifetime CN2816342Y (en) | 2005-06-20 | 2005-06-20 | Cement-filling type packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2816342Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120997A (en) * | 2014-07-31 | 2014-10-29 | 中国石油天然气股份有限公司 | Pipe string for horizontal well |
| CN112302571A (en) * | 2019-07-31 | 2021-02-02 | 陕西海格瑞恩实业有限公司 | Bridge plug for fully-soluble metal casing |
-
2005
- 2005-06-20 CN CN 200520110270 patent/CN2816342Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104120997A (en) * | 2014-07-31 | 2014-10-29 | 中国石油天然气股份有限公司 | Pipe string for horizontal well |
| CN112302571A (en) * | 2019-07-31 | 2021-02-02 | 陕西海格瑞恩实业有限公司 | Bridge plug for fully-soluble metal casing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150620 Granted publication date: 20060913 |