CN205135530U - Biliquid jar external casing packer - Google Patents
Biliquid jar external casing packer Download PDFInfo
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- CN205135530U CN205135530U CN201520872251.9U CN201520872251U CN205135530U CN 205135530 U CN205135530 U CN 205135530U CN 201520872251 U CN201520872251 U CN 201520872251U CN 205135530 U CN205135530 U CN 205135530U
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- central tube
- cap
- packing element
- fluid cylinder
- support
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Abstract
Biliquid jar external casing packer belongs to oil field oil, gas, well well cementation back, the pressure -expandable external casing packer structure technology of sealing spacer pipe and wall of a well annular space. Including the center tube, the lower clutch is connected to the lower extreme of center tube, on the center tube from top to bottom in proper order the cover load onto and the cap is pressed the cap on, is gone up the hydraulic cylinder on, support piece, a plurality of packing element, time support piece, on the center tube of lower stay below from top to bottom in proper order the cover load the hydraulic cylinder, push down the cap, down and the cap, form down hydraulic pressure chamber down between hydraulic cylinder, center tube, the lower clutch, set up feed liquor hole down on the center tube, lower feed liquor hole intercommunication is hydraulic pressure chamber and center tube inner chamber down, pushes down the lower end screw thread connection of cap and lower hydraulic cylinder to push down the cap and be connected with the center tube through lower shearing pin nail, down and the cap is connected with connector thread down, catch under the lower extreme inner wall of hydraulic cylinder sets up under, the interior week of lower catch and the periphery of the center tube above the lower catch all set up the lower pawl of mutually supporting. The utility model discloses seal at a distance from effectual.
Description
Technical field
After the utility model belongs to oil field oil, gas, well well cementation, the pressure expansion sleeve exterior packer structure technology of packing sleeve pipe and borehole wall annular space.
Background technology
After the oil in oil field, gas, water are cemented the well, the interlayer oil caused by abnormal formation pressure, cement slurry weight loss, gas, water are gone here and there mutually, affect cementing quality, do not ensure the normal production of oil well.
At present, conventional waterpower expansion formula external casing packer solves the problem.The action principle of this packer is: after well cementing impact pressure, in sleeve pipe, apply certain pressure, by the specific device of packer, uses in the packing element of drilling fluid filling packer in sleeve pipe, packing element is expanded, the annular space between packing sleeve pipe and pit shaft.Because the borehole wall is irregular, packing element unbalance stress everywhere after expanding, easily makes packer burst, loses packing effect.In addition, waterpower expands formula external casing packer complex structure, and difficulty of processing is large, and required precision is high, and quality is not easy to ensure.According to statistics, waterpower is used to expand formula external casing packer success rate less than 85%.
At present pressure expansion sleeve exterior packer (patent No.: ZL200820037902.2) solve because the borehole wall is irregular, packing element unbalance stress everywhere after expanding, easily makes packer burst to obtain a difficult problem.And have that structure is simple, processing and easy to assembly, the feature such as trouble point is few, construction technology is simple.But existing problems: 1, because external casing packer packing element is long, only have a fluid cylinder, fluid cylinder thrust is limited, and the compressive strain near fluid cylinder packing element is larger, and the packing element deformation comparison away from fluid cylinder is little, even only has slight deformation, and packing effect is undesirable; 2, because compression packing element deformation comparison is large, require to expand 240mm to from external diameter 185mm, the upper and lower supporting seat of packing element is rigidity, do not expand along with packing element external diameter and expand, packing element after expansion does not effectively support, packing element after expansion, easily from supporting cover sliding sleeve, produces the present situation of " de-trousers ", causes packing failure.And the waterpower expansion formula external casing packer action principle of ZL201220688981.X is: after well cementing impact pressure, certain pressure is applied in sleeve pipe, by the specific device of packer, use in the packing element of drilling fluid filling packer in sleeve pipe, packing element is expanded, the annular space between packing sleeve pipe and pit shaft.This structure is irregular due to the borehole wall, and expand rear packing element unbalance stress everywhere, easily makes packer burst, lose packing effect.In addition, waterpower expands formula external casing packer complex structure, and difficulty of processing is large, and required precision is high, and quality is not easy to ensure.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, the biliquid cylinder sleeve external packer of pipe providing a kind of packing effective.
The purpose of this utility model is achieved in that biliquid cylinder sleeve external packer of pipe, comprises central tube, and the upper end of central tube is connected with box cupling, and the lower end of central tube connects lower contact; On described central tube from top to bottom successively cover load onto and cap, upper pressing cap, on fluid cylinder, upper supporting piece, multiple packing element, lower support element; Upper and cap is threaded with central tube, upper pressing cap is connected with the threaded upper ends of upper fluid cylinder, and upper pressing cap is connected with central tube by upper shear pin, hydraulic cavities is formed between upper fluid cylinder and central tube, inlet opening on central tube is arranged, upper inlet opening is communicated with upper hydraulic cavities and central tube inner chamber, arranges lock ring at the upper end inwall of upper fluid cylinder, the periphery of the central tube below the inner circumferential of upper lock ring and upper lock ring all arranges the upper inverted tooth cooperatively interacted, and arranges middle spacer ring between adjacent two packing elements; On central tube below described lower support element, from top to bottom cover loads fluid cylinder, lower pressing cap, lower also cap successively; Lower hydraulic pressure chamber is formed between lower fluid cylinder, central tube, lower contact, central tube arranges lower inlet opening, lower inlet opening is communicated with lower hydraulic pressure chamber and central tube inner chamber, described lower pressing cap is threaded with the lower end of lower fluid cylinder, and lower pressing cap is connected with central tube by down cut pin, described lower and cap is threaded with lower contact, arranges lower lock ring at the lower end inner wall of described lower fluid cylinder, and the periphery of the central tube above the inner circumferential of lower lock ring and lower lock ring all arranges the lower pawl cooperatively interacted.
During work, biliquid cylinder sleeve external packer of pipe, as the ingredient of bunch tube, is lowered into precalculated position by design, and note people cement process is identical with former activities.During for drilling fluid, plug with hold up hoop, after holding up footwear bruising, pressure is elevated to predetermined pressure, upper fluid cylinder and lower fluid cylinder are cut off, down cut pin, descending and the lower fluid cylinder of upper fluid cylinder is up, upper pressing cap drives upper lock ring descending, lower pressing cap drives lower lock ring up, now support member increases along with pressure and expands, shape is bowl-type, keep pressure 3 ~ 5min, fluid cylinder is made fully to compress packing element, joint ring empty gap, now then being let out by cover overpressure is 0, stop 5min, now, packing element is counter pushes fluid cylinder and upper fluid cylinder, because upper lock ring is identical with lower contact external diameter tooth groover rot diameter with central tube with lower lock ring internal diameter, lock ring can not retreat, in prevention, fluid cylinder and lower fluid cylinder retreat, thus ensure packing element compression seal annular clearance.
The utility model is ZL201220688981.X comparatively: waterpower expands formula external casing packer, has that structure is simple, processing and easy to assembly a, feature such as trouble point is few, construction technology is simple.
The utility model is compared with the pressure expansion sleeve exterior packer of ZL200820037902.2, and adopt upper and lower fluid cylinder thrust large, upper lower rubber cylinder compressive strain is even, and seal length is long, effective.
As improvement of the present utility model, described upper supporting piece comprises support packing element, upper elastic steel sheet, upper support ring, described lower support element comprises lower support packing element, lower elastic steel sheet, lower support ring, multiple packing element is arranged between support packing element and lower support packing element, upper elastic steel sheet is compounded in support packing element, lower elastic steel sheet is compounded in lower support packing element, and upper support ring is arranged between support packing element and upper fluid cylinder, and lower support ring is arranged between lower support packing element and lower fluid cylinder.When descending, the lower fluid cylinder of upper fluid cylinder is up, supporting packing element increases along with pressure and expands, and shape is bowl-type, and due to the supporting role of elastic steel sheet, guarantee that supporting packing element does not overturn, support force is large.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Detailed description of the invention
As shown in Figure 1, biliquid cylinder sleeve external packer of pipe, comprises central tube 13, and the lower end of central tube 13 connects lower contact 6, and the upper end of central tube 13 is connected with box cupling 25.On central tube 13 from the bottom to top successively cover load and cap 1, lower pressing cap 3, lower fluid cylinder 5, lower support element 28, lower rubber cylinder 11, on packing element 14, upper supporting piece 29, on fluid cylinder 18, upper pressing cap 22, on and cap 24.
Lower and cap 1 is threaded with lower contact 6.Lower pressing cap 3 is threaded with the lower end of lower fluid cylinder 5, and lower pressing cap 3 is connected with central tube 13 by down cut pin 2, arrange lower lock ring 4 at the lower end inner wall of lower fluid cylinder 5, the periphery of the central tube 13 above the inner circumferential of lower lock ring 4 and lower lock ring 4 all arranges the lower pawl 26 cooperatively interacted.Form lower hydraulic pressure chamber 27 between lower fluid cylinder 5, central tube 13, lower contact 6, central tube 13 arranges lower inlet opening 7, lower inlet opening 7 is communicated with lower hydraulic pressure chamber 27 and central tube 13 inner chamber.Spacer ring 12 in arranging between lower rubber cylinder 11 and upper packing element 14.Hydraulic cavities 30 is formed between upper fluid cylinder 18 and central tube 13, central tube 13 arranges inlet opening 19, upper inlet opening 19 is communicated with upper hydraulic cavities 30 and central tube 13 inner chamber, arrange lock ring 21 at the upper end inwall of upper fluid cylinder 18, the periphery of the central tube 13 below the inner circumferential of upper lock ring 21 and upper lock ring 21 all arranges the upper inverted tooth 31 cooperatively interacted.Upper pressing cap 22 is connected with the threaded upper ends of upper fluid cylinder 18, and upper pressing cap 22 is connected with central tube 13 by upper shear pin 23.Upper and cap 24 is threaded with central tube 13.20 is sealing ring.
Upper supporting piece 29 comprises support packing element 15, upper elastic steel sheet 16, upper support ring 17, lower support element 28 comprises lower support packing element 10, lower elastic steel sheet 9, lower support ring 8, upper packing element 14 and lower rubber cylinder 11 are arranged between support packing element 15 and lower support packing element 10, upper elastic steel sheet 16 is compounded in support packing element 15, lower elastic steel sheet 9 is compounded in lower support packing element 10, upper support ring 17 is arranged between support packing element 15 and upper fluid cylinder 18, and lower support ring 8 is arranged between lower support packing element 10 and lower fluid cylinder 5.
Claims (2)
1. biliquid cylinder sleeve external packer of pipe, comprises central tube, and the upper end of central tube is connected with box cupling, and the lower end of central tube connects lower contact; On described central tube from top to bottom successively cover load onto and cap, upper pressing cap, on fluid cylinder, upper supporting piece, multiple packing element, lower support element; Upper and cap is threaded with central tube, upper pressing cap is connected with the threaded upper ends of upper fluid cylinder, and upper pressing cap is connected with central tube by upper shear pin, hydraulic cavities is formed between upper fluid cylinder and central tube, inlet opening on central tube is arranged, upper inlet opening is communicated with upper hydraulic cavities and central tube inner chamber, arranges lock ring at the upper end inwall of upper fluid cylinder, the periphery of the central tube below the inner circumferential of upper lock ring and upper lock ring all arranges the upper inverted tooth cooperatively interacted, and arranges middle spacer ring between adjacent two packing elements; It is characterized in that: on the central tube below described lower support element, from top to bottom cover loads fluid cylinder, lower pressing cap, lower also cap successively; Lower hydraulic pressure chamber is formed between lower fluid cylinder, central tube, lower contact, central tube arranges lower inlet opening, lower inlet opening is communicated with lower hydraulic pressure chamber and central tube inner chamber, described lower pressing cap is threaded with the lower end of lower fluid cylinder, and lower pressing cap is connected with central tube by down cut pin, described lower and cap is threaded with lower contact, arranges lower lock ring at the lower end inner wall of described lower fluid cylinder, and the periphery of the central tube above the inner circumferential of lower lock ring and lower lock ring all arranges the lower pawl cooperatively interacted.
2. biliquid cylinder sleeve external packer of pipe according to claim 1, it is characterized in that: described upper supporting piece comprises support packing element, upper elastic steel sheet, upper support ring, described lower support element comprises lower support packing element, lower elastic steel sheet, lower support ring, multiple packing element is arranged between support packing element and lower support packing element, upper elastic steel sheet is compounded in support packing element, lower elastic steel sheet is compounded in lower support packing element, upper support ring is arranged between support packing element and upper fluid cylinder, and lower support ring is arranged between lower support packing element and lower fluid cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520872251.9U CN205135530U (en) | 2015-11-05 | 2015-11-05 | Biliquid jar external casing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520872251.9U CN205135530U (en) | 2015-11-05 | 2015-11-05 | Biliquid jar external casing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205135530U true CN205135530U (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520872251.9U Active CN205135530U (en) | 2015-11-05 | 2015-11-05 | Biliquid jar external casing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205135530U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503708A (en) * | 2017-07-07 | 2017-12-22 | 中石化石油工程技术服务有限公司 | A kind of linear sealing packing device |
| CN113847018A (en) * | 2021-09-30 | 2021-12-28 | 于婷婷 | General pilot production tool for packing off earth formation |
-
2015
- 2015-11-05 CN CN201520872251.9U patent/CN205135530U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503708A (en) * | 2017-07-07 | 2017-12-22 | 中石化石油工程技术服务有限公司 | A kind of linear sealing packing device |
| CN107503708B (en) * | 2017-07-07 | 2023-04-25 | 中石化石油工程技术服务有限公司 | Wire seal packing device |
| CN113847018A (en) * | 2021-09-30 | 2021-12-28 | 于婷婷 | General pilot production tool for packing off earth formation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |