CN201318157Y - Oil-soluble impervious screen pipe - Google Patents
Oil-soluble impervious screen pipe Download PDFInfo
- Publication number
- CN201318157Y CN201318157Y CNU2008203035159U CN200820303515U CN201318157Y CN 201318157 Y CN201318157 Y CN 201318157Y CN U2008203035159 U CNU2008203035159 U CN U2008203035159U CN 200820303515 U CN200820303515 U CN 200820303515U CN 201318157 Y CN201318157 Y CN 201318157Y
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- Prior art keywords
- oil
- soluble
- slot
- pipe
- pipe body
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- Expired - Fee Related
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Abstract
The utility model relates to screen pipes used for drilling well, in particular to an oil-soluble impervious screen pipe comprising a pipe body, a blind plate fixedly arranged on the lower end of the pipe body, a cover fixed on the pipe body and capable of coving kerfs and a special dissolvent positioned inside the inner cavity of the pipe body, wherein the kerfs capable of communicating the inner cavity of the pipe body with outside are evenly distributed on the pipe body. The oil-soluble impervious screen pipe has reasonable and compact structure and convenient use, and well completion pipe strings can be quickly and safely landed under no killing well and no under-balanced conditions, thereby greatly enhancing the efficiency and safety when landing well completion pipe strings under no killing well and no under-balanced conditions.
Description
One, technical field
The utility model relates to the screen casing that is used for drilling completion, is the non-infiltration screen casing of a kind of oil-soluble.
Two, background technology
At present, insufficient balance well completion uses three kinds of modes usually: 1, barefoot completion: barefoot completion only need be lowered to oil pipe under insufficient balance condition, need not kill-job tripping assembly and two kinds of auxiliary equipment of unidirectional constant pressure valve can realize safety work, but barefoot completion requires harshness to the stratum, limitation is big.2, casing valve (downhole blow-out preventer): according to sieve tube segment length and completion tubular string structure, casing valve is connected on the sleeve pipe of upper strata in advance, after under-balance drilling operation is finished, when drill bit is lifted from the casing valve position, casing valve is closed, can open wide well head (opening not kill-job tripping assembly) simultaneously; When completion tubular string during down to the casing valve position, open casing valve, utilize not kill-job of well head tripping assembly can be safely smoothly with screen casing down to the design well depth.Because casing valve is disposable use equipment, cost is higher; Casing valve is installed in the protective casing in advance, and adopts cement sealing, in case lost efficacy then without any remedial measure; The casing valve required precision is higher, and the inefficacy probability is bigger.3, utilize the inflatable slot pipe of non-formula to realize sieve tube completion technology: the inflatable slot pipe of non-formula well-completing process is complicated, operation is many, and it is still under test at present, expanding not open after existing tubing string to go into well, (especially the jointing between two slot pipes is difficult to distending, two slot pipes are that well-completing process glue is lowered in well), do not make seam and distending after seam roomy, sand control equivalent risk not.All there is bigger limitation in three kinds of methods, have seriously restricted applying of gas drilling technology.
Three, summary of the invention
The utility model provides a kind of oil-soluble non-infiltration screen casing, has overcome the deficiency of above-mentioned prior art, and it can effectively separate the never following problem that is lowered to the completion tubular string safely of kill-job insufficient balance condition.
The technical solution of the utility model realizes by following measure: the non-infiltration screen casing of a kind of oil-soluble comprises body, blind plate, overburden and special solvent; Lower end at body is installed with blind plate; On body, be evenly distributed with and the slot that is connected outside tube cavity and the body can be fixed with the overburden that can cover slot on body, in the inner chamber of body, special solvent is arranged.
Be further optimization and/or improvements below to above-mentioned utility model technical scheme:
Above-mentioned overburden can be fixed on the body by sulfuration.
The lower end of above-mentioned blind plate can be installed with guide shoe.
The width of above-mentioned slot can be 0.45 millimeter.
The length of above-mentioned slot can be 60 millimeters.
The utility model reasonable and compact in structure, easy to use, can under not kill-job insufficient balance condition, be lowered to the completion tubular string safely and fast, therefore greatly improved efficient and the safety that under not kill-job insufficient balance condition, in well, is lowered to the completion tubular string.
Four, description of drawings
Accompanying drawing 1 is the main TV structure schematic diagram of the utility model most preferred embodiment when not having overburden.
A-A when accompanying drawing 2 has overburden for accompanying drawing 1 is to the sectional structure schematic diagram.
Coding in the accompanying drawing is respectively: 1 is body, and 2 is overburden, and 3 is slot.
Five, the specific embodiment
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
Shown in accompanying drawing 1,2, the non-infiltration screen casing of this oil-soluble comprises body 1, blind plate, overburden 2 and special solvent; Lower end at body 1 is installed with blind plate; On body 1, be evenly distributed with and the slot 3 that is connected outside tube cavity and the body can be fixed with the overburden 2 that can cover slot on body 1, in the inner chamber of body 1, special solvent is arranged.
Can according to actual needs the non-infiltration screen casing of above-mentioned oil-soluble be made further optimization and/or improvements:
Shown in accompanying drawing 1,2, overburden 2 is fixed on the body 1 by sulfuration.
Shown in accompanying drawing 1,2, the lower end of blind plate is installed with guide shoe.
Shown in accompanying drawing 1,2, the width of slot 3 is 0.45 millimeter, and this slot 3 is present slot minimum widith.
Shown in accompanying drawing 1,2, the length of slot 3 is 60 millimeters.
Above technical characterictic has constituted most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
The use of the utility model most preferred embodiment: after under balance pressure drilling finishes, trip out drilling tool, closing under the situation of full envelope, with completion tubular string (guide shoe+blind plate+screen casing string+bunch tube+left-hand thread pipe nipple+send into drilling tool+flechette-type valve+send into drilling tool) during down to full envelope place, the assurance rotating blowout preventer can be held tightly under the situation of sleeve pipe (or screen casing), open full envelope, normally be lowered to the completion tubular string.When being lowered to the utility model, in time pour into special solvent to its inner chamber.When completion tubular column down to the design well depth after, suppress by liquid nitrogen pump vehicle, when pressure rises to annular pressure, elder generation's voltage stabilizing 5 minutes, every thereafter increase 2.0MPa, voltage stabilizing 30 minutes, under pressure, the overburden 2 of sulfuration around slot 3 separates with sleeve body gradually, and special solvent distributes therebetween, dissolves overburden 2 rapidly.When pressure descends suddenly, overburden 2 destroyeds are described, adjust completion tubular string weight then, open the left-hand thread pipe nipple, trip out and send into drilling tool.
Claims (9)
1, the non-infiltration screen casing of a kind of oil-soluble is characterized in that comprising body, blind plate, overburden and special solvent; Lower end at body is installed with blind plate; On body, be evenly distributed with and the slot that is connected outside tube cavity and the body can be fixed with the overburden that can cover slot on body, in the inner chamber of body, special solvent is arranged.
2, the non-infiltration screen casing of oil-soluble according to claim 1 is characterized in that overburden is fixed on the body by sulfuration.
3, the non-infiltration screen casing of oil-soluble according to claim 1 and 2 is characterized in that the lower end of blind plate is installed with guide shoe.
4, the non-infiltration screen casing of oil-soluble according to claim 1 and 2, the width that it is characterized in that slot is 0.45 millimeter.
5, the non-infiltration screen casing of oil-soluble according to claim 3, the width that it is characterized in that slot is 0.45 millimeter.
6, the non-infiltration screen casing of oil-soluble according to claim 1 and 2, the length that it is characterized in that slot is 60 millimeters.
7, the non-infiltration screen casing of oil-soluble according to claim 3, the length that it is characterized in that slot is 60 millimeters.
8, the non-infiltration screen casing of oil-soluble according to claim 4, the length that it is characterized in that slot is 60 millimeters.
9, the non-infiltration screen casing of oil-soluble according to claim 5, the length that it is characterized in that slot is 60 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203035159U CN201318157Y (en) | 2008-12-19 | 2008-12-19 | Oil-soluble impervious screen pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203035159U CN201318157Y (en) | 2008-12-19 | 2008-12-19 | Oil-soluble impervious screen pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201318157Y true CN201318157Y (en) | 2009-09-30 |
Family
ID=41196923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203035159U Expired - Fee Related CN201318157Y (en) | 2008-12-19 | 2008-12-19 | Oil-soluble impervious screen pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201318157Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470228A (en) * | 2013-09-07 | 2013-12-25 | 中国石油集团西部钻探工程有限公司 | Hot melting impermeable screen pipe device |
| CN108457626A (en) * | 2017-12-28 | 2018-08-28 | 中国石油天然气集团公司 | A kind of dissolution type sand bridge screen casing |
| RU2722750C1 (en) * | 2019-05-17 | 2020-06-03 | Алексей Федорович Кутиев | Downhole filter with soluble element |
-
2008
- 2008-12-19 CN CNU2008203035159U patent/CN201318157Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470228A (en) * | 2013-09-07 | 2013-12-25 | 中国石油集团西部钻探工程有限公司 | Hot melting impermeable screen pipe device |
| CN108457626A (en) * | 2017-12-28 | 2018-08-28 | 中国石油天然气集团公司 | A kind of dissolution type sand bridge screen casing |
| RU2722750C1 (en) * | 2019-05-17 | 2020-06-03 | Алексей Федорович Кутиев | Downhole filter with soluble element |
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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: 20090930 Termination date: 20161219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |