CN2402795Y - High-temp. thermal insulation centralizer - Google Patents
High-temp. thermal insulation centralizer Download PDFInfo
- Publication number
- CN2402795Y CN2402795Y CN 99225123 CN99225123U CN2402795Y CN 2402795 Y CN2402795 Y CN 2402795Y CN 99225123 CN99225123 CN 99225123 CN 99225123 U CN99225123 U CN 99225123U CN 2402795 Y CN2402795 Y CN 2402795Y
- Authority
- CN
- China
- Prior art keywords
- rings
- ring
- centering
- reduce
- heat preservation
- 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 - Fee Related
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Abstract
The utility model relates to a high-temperature thermal insulation centralizer, which is composed of a pressure ring (1), heat preservation rings 2, centralizing rings 3 and a spring sheet 4, wherein, the heat preservation rings 2 are two oil-resistant rubber asbestos rings which are respectively inlaid in concave grooves of two metal centralizing rings 3. Because of the adoption of the structure of heat preservation and the spring sheet, through the double action of the two parts, the utility model can reduce the heat loss so as to cause the steam injection quantity to be obviously reduced, can enlarge the sweep efficiency so as to save the steam injection cost, can reduce the oil production cost, can reduce the work intensity, has the advantages of simple structure and reasonable design, and is suitable for on-site generalization and application.
Description
The utility model relates to the downhole tool that uses on a kind of oilfield, particularly a kind of high temperature insulating formula centralizer.
Thickened oil steam-stimulated steam injection pipeline must carry out thermal insulation, to prevent thermal loss.The notes steam pipe of down-hole part mostly is instlated tubular at present, and instlated tubular is the middle double layer oil pipe that accompanies heat-barrier material; Although certain heat waste can be reduced in the stage casing at every pipe, the place still can be considered mono-layer tube at the pipe box cupling, and box cupling touches sleeve pipe, and for general well, particularly gradient well is inevitable.If box cupling touches casing wall, heat will lose by box cupling, sleeve pipe, and the cost of instlated tubular is very high again, has increased cost for oil production; Pipe has increased operating cost intensity heavily again.
The purpose of this utility model is to provide a kind of high temperature insulating formula centralizer, and it has reduced box cupling effectively and has touched casing wall and produce thermal loss and the minimizing cost, reduction labour intensity intensity.
The purpose of this utility model is to realize like this, it is made up of trim ring (1), insulating ring (2), centering ring (3), spring leaf (4), fluted in the centering ring (3), on the groove of insulating ring (2) seat in centering ring (3), trim ring (1) is arranged on it, trim ring (1) is threaded with centering ring (3), and the two ends of arc-shaped spring piece (4) are connected with two symmetrical centering rings (3) respectively.
During construction operation, this centralizer is enclosed within on the oil pipe (5), with oil pipe (5) G.I.H, spring leaf (4) is supported on the inwall of sleeve pipe (6), with annotate parts-rubber asbestos ring that gasoline pipe directly contacts can be high temperature resistant, heat insulation, because its coefficient of thermal conductivity is very little, be about 0.03w/m.oc, be iron one thousandth to ten thousand/, make the heat of annotating gasoline pipe can only be transmitted to very slightly on the spring leaf of centralizer, because the contact area of spring leaf that contacts with sleeve pipe and sleeve pipe is very little.Compare with box cupling, can drop to one of percentage, and the conduction of heat is directly proportional with area, can be so that the heat on the centralizer passes ground very slightly to sleeve pipe.
The utility model by the double action of above two parts, just reaches the minimizing heat waste owing to adopted the structure of insulating ring and spring leaf, has reduced heat waste, makes that annotating the vapour amount obviously reduces, and sweep efficiency increases has saved notes vapour cost.Reduce cost for oil production, reduce operation intensity.It is simple in structure, and is reasonable in design, is well suited for field popularization application.
Accompanying drawing is the novel structural representation of this reality.
Below in conjunction with accompanying drawing the utility model is further specified.
The utility model is made up of trim ring 1, insulating ring 2, centering ring 3, spring leaf 4, and fluted in the centering ring 3, insulating ring 2 is that two oil resistant rubber asbestos rings are embedded in respectively in two metal centering ring 3 inner groovies, directly contacts with the notes gasoline pipe.Trim ring 1 is arranged on it, and trim ring 1 is threaded with centering ring 3, is used for fixing asbestos ring, and the two ends of arc-shaped spring piece 4 are welded to connect with two symmetrical centering rings 3 respectively, and four spring leafs link together two metal centering rings and form a complete centralizer.
In casing deformation place, spring leaf 4 can shrink to remove smoothly in order to oil pipe voluntarily to be set upright oil pipe and occupies in the middle of the sleeve pipe.Just several mouthfuls of wells of having used have at present produced obvious effects.When following steam injection pipeline, centralizer is enclosed within to annotate on the gasoline pipe get final product, general two Guan Fangyi get final product, manage the next one for every when the hole deviation degree is big.During lift pipe string, centralizer is taken off, treat to use again when annotate vapour next time.
Claims (2)
1, a kind of high temperature insulating formula centralizer, it is made up of trim ring (1), insulating ring (2), centering ring (3), spring leaf (4), it is characterized in that: fluted in the centering ring (3), on the groove of insulating ring (2) seat in centering ring (3), trim ring (1) is arranged on it, trim ring (1) is threaded with centering ring (3), and the two ends of arc-shaped spring piece (4) are connected with two symmetrical centering rings (3) respectively.
2, high temperature insulating formula centralizer according to claim 1, it is characterized in that: insulating ring (2) is that two oil resistant rubber asbestos rings are embedded in respectively in two metal centering rings (3) inner groovy, and the two ends of four arc-shaped spring pieces (4) are welded to connect with two symmetrical centering rings (3) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99225123 CN2402795Y (en) | 1999-09-10 | 1999-09-10 | High-temp. thermal insulation centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99225123 CN2402795Y (en) | 1999-09-10 | 1999-09-10 | High-temp. thermal insulation centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2402795Y true CN2402795Y (en) | 2000-10-25 |
Family
ID=34015048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99225123 Expired - Fee Related CN2402795Y (en) | 1999-09-10 | 1999-09-10 | High-temp. thermal insulation centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2402795Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002060748A1 (en) * | 2001-01-31 | 2002-08-08 | Goodbaby Group Corp. | Bicycle's trailer |
| CN101932789B (en) * | 2007-12-27 | 2013-06-19 | 普拉德研究及开发股份有限公司 | Wellbore pipe centralizer having increased restoring force and self-sealing capability |
-
1999
- 1999-09-10 CN CN 99225123 patent/CN2402795Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002060748A1 (en) * | 2001-01-31 | 2002-08-08 | Goodbaby Group Corp. | Bicycle's trailer |
| CN101932789B (en) * | 2007-12-27 | 2013-06-19 | 普拉德研究及开发股份有限公司 | Wellbore pipe centralizer having increased restoring force and self-sealing capability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |