CN2898283Y - Buffering sliding-casing switch - Google Patents
Buffering sliding-casing switch Download PDFInfo
- Publication number
- CN2898283Y CN2898283Y CN 200620112834 CN200620112834U CN2898283Y CN 2898283 Y CN2898283 Y CN 2898283Y CN 200620112834 CN200620112834 CN 200620112834 CN 200620112834 U CN200620112834 U CN 200620112834U CN 2898283 Y CN2898283 Y CN 2898283Y
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- steel ball
- spring
- steam
- utility
- Prior art date
- 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.)
- Expired - Lifetime
Links
Abstract
The utility model relates to a buffer sliding sleeve switch, comprising an upper joint 1, a sealing ring 2, a through hole 3, a steel ball 4, a spring 5, a sliding sleeve 6 and a joint 7. The utility model adopts the technical proposal that: the upper joint is sealing connected with the lower joint through the sealing ring; the through hole is arranged in the upper joint and the sliding sleeve is arranged in the through hole; the steel ball is arranged in the sliding sleeve, which is supported by the spring at the bottom. Firstly, the steam enters into a small layer at the lowest oil well position until reaching the given steam amount; the steel ball with smallest diameter is thrown into the well and passes through the upper buffer sliding sleeve switch; the inner diameter of the sliding sleeve is bigger than the steel ball diameter to enable the steel ball to pass through the sliding sleeve in principle. After reaching the given steam amount, steel balls with corresponding diameter are thrown into the well again and then the steam is poured into corresponding layers and by parity of reasoning finish multilevel steam pouring on three layers more. The compression force of the spring is used as the buffering force to avoid the upper steel ball shoving the sliding sleeve switch open by chance, which should be closed during throwing the steel ball to ensure the successful implement of the layered steaming pouring. The utility model has the advantages of simple structure, easy operation and field popularization.
Description
Technical field:
The utility model is a kind of downhole tool that a kind of oilfield steam injection is used, particularly a kind of buffering sliding sleeve switch.
Background technology:
Pitching choosing notes, the de-plugging process technology of application during oil thermal recovery is handled up and developed at present, have an obvious limitation: reason is because of the sliding sleeve switch structural limitations, the two-layer form of annotating vapour respectively can only be reached, a plurality of switches can not be designed, repeatedly the choosing carried out more than three layers of pitching is annotated.Because existing sliding sleeve switch, when throwing first steel ball, the falling speed of invar ball in tubing string is very big, if do not taking buffer on a sliding sleeve topmost, cause its pin to be cut off easily, will occur only throwing a steel ball like this and just two sliding sleeves be opened simultaneously, cause the failure of layer steam injection measure technology.
Technical scheme:
The purpose of this utility model is to provide a kind of sliding sleeve switch that can cushion, and it adopts the elastic compression masterpiece of spring to be buffering, and the sliding sleeve switch that top should not be opened when avoiding pitching is rushed open by the Metal Ball accident, guarantees the smooth implementation of layer steam injection measure.
The purpose of this utility model is to realize like this, mainly form by top connection (1), sealing ring (2), through hole (3), ball (4), spring (5), sliding sleeve (6), lower contact (7) just, top connection (1) is tightly connected by sealing ring (2) and lower contact (7), through hole (3) is arranged in top connection (1), sliding sleeve (6) is arranged in it, there is firm ball (4) at sliding sleeve (6) seat of honour, and the bottom has spring (5) to support.
2 or 3 buffering sliding sleeve switches that structure is identical are installed in steam injection string successively, and switching sliding sleeve internal diameter from the bottom to top increases gradually.Supporting corresponding thermal packer between each switch has promptly been finished multistage injection allocation tubing string.At first steam enters oil well substratum position bottom, annotate the vapour amount to design after, drop into the steel ball of diameter minimum, steel ball is during through the buffering sliding sleeve switch on top, the internal diameter of sliding sleeve is greater than steel ball size, steel ball can pass through smoothly in principle.When on the unexpected sideslip of steel ball strikes the half the circumference of the sleeve where it joins the shoulder of sliding sleeve, causing top sliding sleeve switch moment to be opened, because the elastic buffer effect of spring can be closed again again, last steel ball drops down onto on the sliding sleeve half the circumference of the sleeve where it joins the shoulder of design switch, under the pressure effect of steam, steel ball, sliding sleeve compression spring, sliding sleeve moves down and exposes the notes steam vent, and beginning is at equivalent layer position steam in jection.After design notes vapour amount, drop into the steel ball of respective diameters once more, annotate the equivalent layer position again, finish the multistage injection allocation more than three layers by that analogy.
The utility model has through hole owing to adopt top connection to be tightly connected by sealing ring and lower contact in top connection, sliding sleeve is arranged in it, and there is firm ball at the sliding sleeve seat of honour, and the bottom has spring to support.At first steam enters oil well substratum position bottom, annotate the vapour amount to design after, drop into the steel ball of diameter minimum, steel ball is during through the buffering sliding sleeve switch on top, the internal diameter of sliding sleeve is greater than steel ball size, steel ball can pass through smoothly in principle.After design notes vapour amount, drop into the steel ball of respective diameters once more, annotate the equivalent layer position again, finish the multistage injection allocation more than three layers by that analogy.It adopts the elastic compression masterpiece of spring to be buffering, and the sliding sleeve switch that top should not be opened when avoiding pitching is rushed open by the Metal Ball accident, guarantees the smooth implementation of layer steam injection measure.The utility model is simple in structure, reasonable in design, and is easy to use, is well suited for field popularization application.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Below in conjunction with accompanying drawing the utility model is further specified.
Embodiment
As shown in the figure, the utility model is made up of top connection 1, sealing ring 2, through hole 3, ball 4, spring 5, sliding sleeve 6, lower contact 7 just, top connection 1 is tightly connected by sealing ring 2 and lower contact 7, through hole 3 is arranged in top connection 1, sliding sleeve 6 is arranged in it, there is firm ball 4 at sliding sleeve 6 seats of honour, and the bottom has spring 5 to support.
Claims (1)
1, a kind of buffering sliding sleeve switch, mainly form by top connection (1), sealing ring (2), through hole (3), ball (4), spring (5), sliding sleeve (6), lower contact (7) just, it is characterized in that: top connection (1) is tightly connected by sealing ring (2) and lower contact (7), through hole (3) is arranged in top connection (1), sliding sleeve (6) is arranged in it, there is firm ball (4) at sliding sleeve (6) seat of honour, and the bottom has spring (5) to support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620112834 CN2898283Y (en) | 2006-04-26 | 2006-04-26 | Buffering sliding-casing switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620112834 CN2898283Y (en) | 2006-04-26 | 2006-04-26 | Buffering sliding-casing switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2898283Y true CN2898283Y (en) | 2007-05-09 |
Family
ID=38073619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620112834 Expired - Lifetime CN2898283Y (en) | 2006-04-26 | 2006-04-26 | Buffering sliding-casing switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2898283Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103080470A (en) * | 2010-07-01 | 2013-05-01 | 史密斯运输股份有限公司 | Multiple ball-ball seat for hydraulic fracturing with reduced pumping pressure |
| CN104234683A (en) * | 2014-09-12 | 2014-12-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Reducing mechanism |
| US9181778B2 (en) | 2010-04-23 | 2015-11-10 | Smith International, Inc. | Multiple ball-ball seat for hydraulic fracturing with reduced pumping pressure |
-
2006
- 2006-04-26 CN CN 200620112834 patent/CN2898283Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9181778B2 (en) | 2010-04-23 | 2015-11-10 | Smith International, Inc. | Multiple ball-ball seat for hydraulic fracturing with reduced pumping pressure |
| CN103080470A (en) * | 2010-07-01 | 2013-05-01 | 史密斯运输股份有限公司 | Multiple ball-ball seat for hydraulic fracturing with reduced pumping pressure |
| CN103080470B (en) * | 2010-07-01 | 2015-11-25 | 史密斯运输股份有限公司 | For with the many ball-ball seats of pumping pressure fracturing reduced |
| CN104234683A (en) * | 2014-09-12 | 2014-12-24 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Reducing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070509 |
|
| EXPY | Termination of patent right or utility model |