CN204920891U - Instrument of scurrying is prevented to thin layer cement of giving birth - Google Patents
Instrument of scurrying is prevented to thin layer cement of giving birth Download PDFInfo
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- CN204920891U CN204920891U CN201520634946.3U CN201520634946U CN204920891U CN 204920891 U CN204920891 U CN 204920891U CN 201520634946 U CN201520634946 U CN 201520634946U CN 204920891 U CN204920891 U CN 204920891U
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Abstract
The utility model relates to an instrument of scurrying is prevented to thin layer cement of giving birth. Its technical scheme is: mainly comprise coupling, center tube, hydraulic cylinder, piston, piston reset spring, cement chamber, packing element, packing element helmet, the packing element passes through the packing element helmet to be fixed on the center tube, and hydraulic cylinder, cement chamber and packing element helmet are fixed respectively on the center tube, hydraulic cylinder and center tube pass through hydraulic cylinder inlet intercommunication, be equipped with piston and piston reset spring between hydraulic cylinder and the center tube, the outside in cement chamber be equipped with the cement inlet, the lower part in cement chamber is advanced the packing element valves through cement and is connected to the packing element, packing element outside and inside is filled fullly by cement, realize preventing scurrying. The beneficial effects are that: it is easy and simple to handle to be under construction, becomes conventional instrument and seal to long lasting entity is sealed more effective realization zone isolation under the prerequisite that does not change former well cementation construction process. Owing to adopt the construction of no inner tube, avoided interior intubate construction process complicated simultaneously, the long risk of construction cycle.
Description
Technical field
The utility model relates to a kind of oilfield well completion instrument, and particularly one is given birth thin layer cement anti-channeling instrument.
Background technology
Oil is as scarce resource, recovery process often can run into oil sheet, thickness of interlayer between oil reservoir and water layer is thin, some thickness of interlayer only have 1 ~ 3m, current conventional leptophragmata layer cementing method is that the leptophragmata layer place utilizing external packer of pipe between oil reservoir and water layer carries out packing, generally scene mostly adopts the swollen sealing tube external packer technology of completion fluid, but conventional cementing is difficult to form a kind of densification at leptophragmata layer place, long-acting Inter-zonal packing, a period of time easily causes interlayer channelling after producing, thermal production well situation is just even more serious, As time goes on, external packer of pipe seal is the rapid aging breakage of meeting under the condition that down-hole is severe, swollen sealing liquid body in encapsulation flows out packing element, thus cause the inefficacy of packer.
Summary of the invention
The purpose of this utility model is exactly in view of the foregoing defects the prior art has, provides one to give birth thin layer cement anti-channeling instrument, and what solve that the aging broken invalid of packer under long-term mal-condition cause alters layer; Construction is simple simultaneously, does not change original technique, has good economic benefit.
Its technical scheme is: primarily of box cupling, central tube, fluid cylinder, piston, piston reset spring, cement chamber, packing element, packing element helmet composition, packing element is fixed on central tube by packing element helmet, fluid cylinder, cement chamber and packing element helmet are separately fixed on central tube, described fluid cylinder is communicated with by fluid cylinder inlet with central tube, is provided with piston and piston reset spring between fluid cylinder and central tube; The outside in described cement chamber is provided with cement inlet, and the bottom in cement chamber is entered packing element valve group by cement and is connected to packing element, and the outside of packing element and inside are filled full by cement, realize anti-channeling.
Above-mentioned fluid cylinder inlet is arranged on the central tube of the upside of piston.
The beneficial effects of the utility model are: constructing operation is easy, become conventional instrument and be sealed into long-acting entity sealing under the prerequisite not changing former cementing operation technique, more effectively realize zone isolation.Simultaneously owing to adopting without interior pipe construction, avoid interpolation pipe complicated construction technique, long construction period, construction risk is high, the risk of interior pipe " plant flag bar ".
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model;
In upper figure: box cupling 1, central tube 2, fluid cylinder 3, packing element 4, fluid cylinder inlet 5, piston 6, piston reset spring 7, cement inlet 8, cement enter packing element valve group 9, cement chamber 10, packing element helmet 11.
Detailed description of the invention
By reference to the accompanying drawings 1, the utility model will be further described:
The utility model forms primarily of box cupling 1, central tube 2, fluid cylinder 3, piston 6, piston reset spring 7, cement chamber 10, packing element 4, packing element helmet 11, packing element 4 is fixed on central tube 2 by packing element helmet 11, fluid cylinder 3, cement chamber 10 and packing element helmet 11 are separately fixed on central tube 2, described fluid cylinder 3 is communicated with by fluid cylinder inlet 5 with central tube 2, is provided with piston 6 and piston reset spring 7 between fluid cylinder 3 and central tube 2; The outside in described cement chamber 10 is provided with cement inlet 8, and the bottom in cement chamber 10 is entered packing element valve group 9 by cement and is connected to packing element 4, and the outside of packing element 4 and inside are filled full by cement, realize anti-channeling.
Wherein, fluid cylinder inlet 5 is arranged on the central tube 2 of the upside of piston 6.
Lower fashionable starting bar is not triggered, instrument is in the lock state, be connected with whole completion tubular string by box cupling and central tube external screw thread, during work, replace while plug passes through for slurry and start, open fluid cylinder inlet 5, cement inlet 7, instrument is made to be in active state, after plug puts in place, pressurizeed by well head, promote descent of piston, then well head step-down, piston is up under the effect of concrete column pressure and piston reset spring, tool exterior cement enters cement chamber 10 by cement inlet 7 simultaneously, now well head pressurization, descent of piston, cement in cement chamber 10 is entered by piston the inner space that cement port 9 clamp-ons packing element 4, then well head step-down, piston stroking upward, suck outside cement to cement chamber, so repeatedly, until packing element 4 spreading completely, then Hou Ning cement, so far, packing element is outside and inner is filled completely by cement, realize fleeing proof effect.
The above is only preferred embodiment of the present utility model, and any those of ordinary skill in the art all may utilize the technical scheme of above-mentioned elaboration to the utility model correct or are revised as equivalent technical scheme.Therefore, any simple modification of carrying out according to the technical solution of the utility model or substitute equivalents, belong to the greatest extent the scope that the utility model is claimed.
Claims (2)
1. a thin layer cement anti-channeling instrument of giving birth, it is characterized in that: primarily of box cupling (1), central tube (2), fluid cylinder (3), piston (6), piston reset spring (7), cement chamber (10), packing element (4), packing element helmet (11) forms, packing element (4) is fixed on central tube (2) by packing element helmet (11), fluid cylinder (3), cement chamber (10) and packing element helmet (11) are separately fixed on central tube (2), described fluid cylinder (3) is communicated with by fluid cylinder inlet (5) with central tube (2), piston (6) and piston reset spring (7) is provided with between fluid cylinder (3) and central tube (2), the outside in described cement chamber (10) is provided with cement inlet (8), and the bottom of cement chamber (10) is entered packing element valve group (9) by cement and is connected to packing element (4), and the outside of packing element (4) and inside are filled full by cement, realize anti-channeling.
2. thin layer cement anti-channeling instrument of giving birth according to claim 1, is characterized in that: described fluid cylinder inlet (5) is arranged on the central tube (2) of the upside of piston (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520634946.3U CN204920891U (en) | 2015-08-21 | 2015-08-21 | Instrument of scurrying is prevented to thin layer cement of giving birth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520634946.3U CN204920891U (en) | 2015-08-21 | 2015-08-21 | Instrument of scurrying is prevented to thin layer cement of giving birth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204920891U true CN204920891U (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520634946.3U Active CN204920891U (en) | 2015-08-21 | 2015-08-21 | Instrument of scurrying is prevented to thin layer cement of giving birth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204920891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047791A (en) * | 2021-04-06 | 2021-06-29 | 中国石油天然气集团有限公司 | Heavy oil thermal recovery top water channeling and multistage steam channeling prevention method |
-
2015
- 2015-08-21 CN CN201520634946.3U patent/CN204920891U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047791A (en) * | 2021-04-06 | 2021-06-29 | 中国石油天然气集团有限公司 | Heavy oil thermal recovery top water channeling and multistage steam channeling prevention method |
| CN113047791B (en) * | 2021-04-06 | 2023-02-24 | 中国石油天然气集团有限公司 | Heavy oil thermal recovery top water channeling and multistage steam channeling prevention method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |