CN203362120U - Horizontal well segmented even negative pressure acid pickling tubular column - Google Patents
Horizontal well segmented even negative pressure acid pickling tubular column Download PDFInfo
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- CN203362120U CN203362120U CN 201320405587 CN201320405587U CN203362120U CN 203362120 U CN203362120 U CN 203362120U CN 201320405587 CN201320405587 CN 201320405587 CN 201320405587 U CN201320405587 U CN 201320405587U CN 203362120 U CN203362120 U CN 203362120U
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- horizontal well
- negative pressure
- tubular column
- choked flow
- tubing string
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Abstract
The utility model provides a horizontal well segmented even negative pressure acid pickling tubular column. The horizontal well segmented even negative pressure acid pickling tubular column comprises a tubular column body which comprises even injection allocation devices, choked flow packers, a sealed insertion tube and a well washing valve assembly all of which are sequentially connected from top to bottom, wherein the even injection allocation devices and the choked flow packers are connected into combinations through threads, and the number of the combinations is at least one. The tubular column body is located inside open hole sieve tubes, the length of the tubular column body is matched with the length of the open hole sieve tubes, open hole annuluses are arranged on the outer sides of the open hole sieve tubes, and the length of the tubular column body is adjusted through the number of the combinations formed by connecting the even injection allocation devices with the choked flow packers. The horizontal well segmented even negative pressure acid pickling tubular column completely cleans the drilling mud pollution and mud blocking at the horizontal well sieve tubes, the open hole annuluses and immediate vicinity of a well, and effectively overcomes the defects that in the prior art, traditional acid pickling is not strong in pertinence, cleaning of mud cakes is not complete, and residual acid is left at the position with the irregular well diameters and causes corrosion easily.
Description
Technical field
The utility model relates to bore hole sieve tube segment mud cake cleaning technique, the specifically even negative pressure pickling of a kind of horizontal well in segments tubing string.
Background technology
At present, most of horizontal well adopts bore hole screen sand control completion, this part well is in the operation process, all need the mud cake between bore hole well and screen casing is cleaned, current mud cake cleaning rests on the basis of the common anti-circulation well cleanup technique of compound acid solution more, there is certain mud cake cleaning action, but also have following problem:
(1) traditional pickling can't realize uniform acid distribution, causes part bore hole sieve tube segment mud cake to clean not thorough, affects to a certain extent the horizontal well single well productivity;
(2) traditional pickling is just cleaned the mud cake in screen casing and open-hole annulus, does not possess the function of nearly well transformation;
(3), for the irregular sieve tube segment of hole diameter, mud cake is difficult to remove and easily causes residual acid to be detained, and causes the screen casing heavy corrosion during steam injection.
Summary of the invention
The purpose of this utility model is to provide the even negative pressure pickling of a kind of horizontal well in segments tubing string, drilling mud pollution and the shale of thoroughly removing horizontal well sieve tube and open-hole annulus and near wellbore zone stop up, effectively overcome or avoid problem in prior art, the problem includes: traditional pickling specific aim is strong, mud cake removal is thorough, the problem that easily causes corrosion, the degree of perfection of the well of improving the standard are detained in the residual acid in the irregular place of hole diameter.
The purpose of this utility model can be achieved by the following technical measures:
The even negative pressure pickling of this horizontal well in segments tubing string comprises from top to bottom interconnective even distributor, choked flow packer, sealing intubate, flushing valve assembly successively, described even distributor, choked flow packer are threaded connection into a combination, and this combination at least arranges one.
The purpose of this utility model also can be achieved by the following technical measures:
Described tubing string is positioned at bore hole screen casing inside, and matches with bore hole screen casing length, and the bore hole screen casing outside is open-hole annulus, and the quantity of the combination that the length of described tubing string connects into by even distributor, choked flow packer is regulated.
Described even distributor comprises bindiny mechanism, and even injection allocation inner tube and even injection allocation outer tube that described bindiny mechanism is arranged on respectively box cupling inside by box cupling and coaxial-type form.
Described even distributor also comprises even injection allocation mechanism, and described even injection allocation mechanism is comprised of hydraulic pressure ball seat, steel ball, effluent conversion mouth, spring, acid-filling mouth and bottom valve body.
Described choked flow packer comprises central tube and is enclosed within successively leather cup, leather cup seat, adapter sleeve, leather cup, the leather cup seat on the central tube outer circle wall from top to bottom.
The utlity model has following beneficial effect:
Drilling mud pollution and shale that the utility model is thoroughly removed horizontal well sieve tube and open-hole annulus and near wellbore zone stop up, effectively overcome or avoid problem in prior art, the problem includes: traditional pickling specific aim is strong, mud cake removal is thorough, the problem that easily causes corrosion is detained in the residual acid in the irregular place of hole diameter, the improve the standard degree of perfection of well, remove the harm of remaining acid, thereby extend the sand control life.
The accompanying drawing explanation
The structural representation that Fig. 1 is the utility model embodiment;
Fig. 2 is anti-flushing well process schematic diagram of the present utility model;
Fig. 3 is even injection process schematic diagram of the present utility model.
In figure: flushing valve assembly 1, sealing intubate 2, choked flow packer 3, even distributor 4, bore hole screen casing 5, open-hole annulus 6, sleeve pipe 7, oil pipe 8.
The specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate accompanying drawing to be described as follows, yet accompanying drawing only provides the use of reference with explanation, not is used for the utility model is limited.
As shown in Figure 1, the even negative pressure acid washing method of the horizontal well in segments of the present embodiment comprises a flushing valve assembly 1, sealing intubate 2, one or several choked flow packer 3, one or several even distributor 4, one group of bore hole screen casing 5, open-hole annulus 6.Described flushing valve assembly 1, sealing intubate 2, choked flow packer 3, the even negative pressure acid cleaning process of even distributor 4 common formation horizontal well in segments tubing string.Wherein, evenly distributor 4 is provided with acid-filling mouth, and this mouth is for circulation well cleanup process external circulation passage; Choked flow packer 3 of 4 times terminations of each even distributor, the two is threaded connection, and according to the demand of horizontal well in segments pickling, can be equipped with a plurality of even distributors 4 and choked flow packer 3, realizes the demand of even pickling.Evenly the hydraulic pressure ball seat on distributor 4 and steel ball have formed unidirectional liquid stream device.Choked flow packer 3 has sealing function.Choked flow packer 3 lower ends are connected with sealing intubate 2 by screw thread; Sealing intubate 2 lower ends are connected with flushing valve assembly 1 by screw thread.
Shown in Fig. 2, anti-circulation well cleanup process:
Anti-for the high-quality completion fluid: as (to take density as 0.5～0.6g/cm
3the foam solution form replace into); In the situation that oil pipe is opened, the high-quality completion fluid is by the oil jacket annular space, enter open-hole annulus 6 through bore hole screen casing 5 under the effect of choked flow packer 3, with the slurry fluid effect in open-hole annulus, and carry slurry fluid and enter into oil pipe through flushing valve 1 and the fluid course that sealing intubate 2 forms, finally from oil pipe, return to ground.
Annotate: during liquid process choked flow packer 3, its double leather cup structure forms sealing function at the oil jacket annular space, and liquid can't directly flow to the other end, forces liquid to enter open-hole annulus 5 through bore hole screen casing 5, realizes the fluid course transfer process.
Shown in Fig. 3, even injection process:
Just squeezing the foam acid solution: (according to every section stratum transformation consumption of design, take density as 0.4～0.5g/cm
3the foam solution form replace into); Close the outlet of oil jacket annular space, pass through oil pipe according to every section design foam acid solution consumption, enter open-hole annulus 6 through bore hole screen casing 5 under the effect of one or several choked flow packer 3 and one or several even distributor 4, mud cake, the effect of formation contaminant thing with in open-hole annulus and near wellbore zone, after clamp-oning design foam acid solution consumption, replace the high-quality completion fluid of whole oil pipe volume consumption, then close the oil pipe import, form confined space, closing well reaction 30～60 minutes.
Annotate: during the even distributor 4 of liquid process, its even process of injection allocation relies on formation absorption ability to realize.The spring pressure design is evenly arranged in distributor 4, complete under the structure actings in conjunction such as spring, steel ball and ball seat.
The foregoing is only preferred embodiment of the present utility model, non-in order to limit the scope of the claims of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to the scope of the claims of the present utility model.
Claims (5)
1. the even negative pressure pickling of a horizontal well in segments tubing string, it is characterized in that, comprise from top to bottom interconnective even distributor, choked flow packer, sealing intubate, flushing valve assembly successively, described even distributor, choked flow packer are threaded connection into a combination, and this combination at least arranges one.
2. the even negative pressure pickling of a kind of horizontal well in segments according to claim 1 tubing string, it is characterized in that, described tubing string is positioned at bore hole screen casing inside, and with bore hole screen casing length matches, the bore hole screen casing outside is open-hole annulus, and the quantity of the combination that the length of described tubing string connects into by even distributor, choked flow packer is regulated.
3. the even negative pressure pickling of a kind of horizontal well in segments according to claim 1 tubing string, it is characterized in that, described even distributor comprises bindiny mechanism, and even injection allocation inner tube and even injection allocation outer tube that described bindiny mechanism is arranged on respectively box cupling inside by box cupling and coaxial-type form.
4. the even negative pressure pickling of a kind of horizontal well in segments according to claim 3 tubing string, it is characterized in that, described even distributor also comprises even injection allocation mechanism, and described even injection allocation mechanism is comprised of hydraulic pressure ball seat, steel ball, effluent conversion mouth, spring, acid-filling mouth and bottom valve body.
5. the even negative pressure pickling of a kind of horizontal well in segments according to claim 1 tubing string, it is characterized in that, described choked flow packer comprises central tube and is enclosed within successively leather cup, leather cup seat, adapter sleeve, leather cup, the leather cup seat on the central tube outer circle wall from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320405587 CN203362120U (en) | 2013-07-09 | 2013-07-09 | Horizontal well segmented even negative pressure acid pickling tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320405587 CN203362120U (en) | 2013-07-09 | 2013-07-09 | Horizontal well segmented even negative pressure acid pickling tubular column |
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| Publication Number | Publication Date |
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| CN203362120U true CN203362120U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320405587 Expired - Fee Related CN203362120U (en) | 2013-07-09 | 2013-07-09 | Horizontal well segmented even negative pressure acid pickling tubular column |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278971A (en) * | 2013-07-09 | 2015-01-14 | 中国石油化工股份有限公司 | Horizontal well segmentation uniform negative pressure pickling method and negative pressure pickling pipe column |
| CN108086954A (en) * | 2017-12-07 | 2018-05-29 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Horizontal well is classified pickling acidization tool |
| CN110273652A (en) * | 2018-03-14 | 2019-09-24 | 中国石油天然气股份有限公司 | The acid washing method of producing well pickling tubular column structure and producing well |
| CN114575787A (en) * | 2020-11-30 | 2022-06-03 | 中国石油天然气股份有限公司 | Plug removal pipe column and method for long well section polluted well |
-
2013
- 2013-07-09 CN CN 201320405587 patent/CN203362120U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278971A (en) * | 2013-07-09 | 2015-01-14 | 中国石油化工股份有限公司 | Horizontal well segmentation uniform negative pressure pickling method and negative pressure pickling pipe column |
| CN104278971B (en) * | 2013-07-09 | 2017-11-28 | 中国石油化工股份有限公司 | The uniform negative pressure acid washing method of horizontal well in segments and negative pressure pickling tubing string |
| CN108086954A (en) * | 2017-12-07 | 2018-05-29 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Horizontal well is classified pickling acidization tool |
| CN108086954B (en) * | 2017-12-07 | 2020-07-28 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Horizontal well grading acid pickling acidification method |
| CN110273652A (en) * | 2018-03-14 | 2019-09-24 | 中国石油天然气股份有限公司 | The acid washing method of producing well pickling tubular column structure and producing well |
| CN114575787A (en) * | 2020-11-30 | 2022-06-03 | 中国石油天然气股份有限公司 | Plug removal pipe column and method for long well section polluted well |
| CN114575787B (en) * | 2020-11-30 | 2023-12-22 | 中国石油天然气股份有限公司 | Plugging removal pipe column and method for long well section polluted well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20180709 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |