CN102979491A - Multielement oil well screen - Google Patents
Multielement oil well screen Download PDFInfo
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- CN102979491A CN102979491A CN2011102618772A CN201110261877A CN102979491A CN 102979491 A CN102979491 A CN 102979491A CN 2011102618772 A CN2011102618772 A CN 2011102618772A CN 201110261877 A CN201110261877 A CN 201110261877A CN 102979491 A CN102979491 A CN 102979491A
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Abstract
A multielement oil well screen comprises a sand filter with two ends respectively connected with a sleeve pipe. An outer protection tube of the sand filter is next to an oil layer, and a laser cutting screen is communicated with a liquid flow channel in an oil layer sleeve pipe. An inner sand-filtering medium, an outer sand-filtering medium and an outer protection pipe are sequentially installed on the laser cutting screen, and welding heads are installed at two end portions the inner sand-filtering medium, the outer sand-filtering medium and the outer protection pipe. A structure of the outer sand-filtering medium is a rectangular metal screen formed by braiding a stainless steel wire, length-width ratio is 0.65-0.9, diameter of the stainless steel wire is 0.5-2.0mm, the length direction of a rectangular is along the axial direction of the laser cutting screen, and the inner sand-filtering medium of the sand filter is in a folding corrugation-shaped structure of a rectangular metal screen formed by braiding a stainless steel wire. The multielement oil well screen has the advantages that an oil well can be put into normal production without well cementation on an oil layer section and without performing filling and construction outside the screen and the like, and the multielement oil well screen can be widely applied to well completion process of an oil exploitation sandstone reservoir horizontal well.
Description
Technical field
The present invention relates to oil exploitation well sand-preventing process downhole tool, particularly a kind of Multi-element oil well screen.
Background technology
At present, in oil exploitation, a large amount of sand-proof pipes that use of thick oil horizontal well, generally adopt two kinds of structures: a kind of is length according to actual perforated interval, is lowered to the sand-proof pipe of corresponding length in the perforated interval production string; Another kind is all to be lowered to the sand-proof pipe filling outside the line pipe of going forward side by side at the net horizontal section oil reservoir.The sand-proof pipe of these two kinds of structures is that the thick oil horizontal well exploitation contributes, its have simultaneously following shortcoming or deficiency: 1. structure one mainly according to the length of actual perforated interval in definite sand-proof pipe length, the outer cementing concrete ring of sleeve pipe causes oil layer pollution and affects perforating effect, so that oil well productivity descends; 2. sand control inefficacy post-processing difficulty is larger; 3. structure two mainly utilizes the outer filling quartz sand of sleeve pipe or ceramsite sand formation secondary sand block barrier to reach the sand control purpose, but because the particularity of horizontal well, often can not outside pipe, form the sand block barrier of average, so that the sand block barrier is imperfect, reservoir sand part imperfect from filling or that do not have filling to put in place enters, and causes sand control to lose efficacy; 4. the outer stowing operation more complicated of pipe sometimes can be slipped up because of the part of filling construction, and the sand-proof pipe heat resistance is relatively poor, and the sand-proof pipe slit increases after the steam injection, also can cause the sand control failure.5. especially to the Heavy Oil Reservoir horizontal well sand control of steam injection development, above-mentioned two kinds of structures there is no method and directly use.
Summary of the invention
The purpose of this invention is to provide a kind of Multi-element oil well screen, adopt dissimilar filter sand media, laser slotted screen pipe organic assembling structure, form multi-level sand control barrier, thereby namely solve the problem of sandstone oil reservoir horizontal well sieve tube completion and sand control difficulty, the shortcoming or the deficiency that effectively overcome or avoid existing in the above-mentioned prior art.
Multi-element oil well screen of the present invention comprises production string, sand filter.Described sand filter two ends are connected with sleeve pipe respectively, and the outside protective pipe of sand filter is close to oil reservoir, and the fluid course in laser slotted screen pipe and the production string is connected; The interior filter sand medium of described sand filter, outer filter sand medium, outside protective pipe are installed on the laser slotted screen pipe successively, and the both ends of interior filter sand medium, outer filter sand medium, outside protective pipe are equipped with plumb joint; The structure of the outer filter sand medium of described sand filter is the rectangle metallic sieve of stainless steel wire braiding, and Aspect Ratio is 0.65 ~ 0.9, and the stainless steel wire diameter is 0.5 ~ 2.0mm, and the direction of rectangle length is along the axial direction of laser slotted pipe; The interior filter sand medium of described sand filter is the folding wave structure of the rectangle metallic sieve of stainless steel wire braiding.
Wherein, the both ends of stating outer filter sand medium, outside protective pipe are sealed mutually by joint, and seal mutually with laser slotted screen pipe.The laser slotted of described laser slotted screen pipe is the rectangle structure that staggers in the interval, and the laser slotted screen pipe two ends grow outside the plumb joint, and this grows part and is provided with connecting thread.The folding direction of the folding corrugated metal screen cloth of the interior filter sand medium of described sand filter is the direction along rectangular length, and crest and trough distance are 2.0 ~ 4.0mm, and two wave spaces are 2 ~ 5mm.Be provided with the opening of crossing of punching press formation on the described outside protective pipe.Described outer filter sand medium external surface is connected with outside protective pipe, and inner surface is connected with interior filter sand medium.Described interior filter sand medium external surface is connected with outer filter sand medium, and inner surface is connected with laser slotted screen pipe.
The present invention has following advantage and beneficial effect compared with prior art:
1, energy Effective Raise sand control capability, prolongation sand control life, raising fluid producing intensity for the lower step takes technological measure that the accurate analysis data is provided, are guaranteed the validity of technological measure.According to the situation statistics of 2 mouthfuls of oil wells of present test, effective 2 mouthfuls, increase day by day 1.31 tons of oil of average individual well on year-on-year basis, 2 mouthfuls of wells still remain valid, and accumulative total increases 1507.4 tons of oil, obtains distinct economic;
2, easy to operate, can when drilling completion, be lowered into horizontal oil reservoir well section with production string, oil reservoir well Duan Buxu cements the well, need not manage outer filling, and oil well can drop into normal production;
3, the present invention be mainly used in the horizontal well sand control and annotate the steam well sand-preventing process in, all material heat resistances are good, and wave structure is guaranteed to utilize in the steam injection process steam injection pressure to remove the screen cloth obstruction and can not be destroyed screen cloth, through overtesting, the sand control precision reaches 0.07mm after the proportioning, can satisfy steam injection and production requirement requirement;
4, reduce cementing concrete to the injury of oil reservoir, reduce operation perforation operation and pipe is outer, save the validity that accounts for the well time, guarantees the measure of sandstone oil reservoir horizontal well sand-preventing process.
Description of drawings
Fig. 1 is a kind of example structure schematic diagram that the present invention uses at horizontal well;
Fig. 2 is for pressing sand filter structural representation shown in Figure 1.
The specific embodiment:
Consult Fig. 1-Fig. 2, a kind of Multi-element oil well screen comprises production string 1, sand filter 4, it is characterized in that described sand filter 4 two ends are connected with sleeve pipe 1 respectively, the outside protective pipe 6 of sand filter 4 is close to oil reservoir 3, and the fluid course 3 in laser slotted screen pipe 9 and the production string 1 is connected; The interior filter sand medium 8 of described sand filter 4, outer filter sand medium 7, outside protective pipe 6 are installed on the laser slotted screen pipe 9 successively, and the both ends of interior filter sand medium 8, outer filter sand medium 7, outside protective pipe 6 are equipped with plumb joint 5; The structure of the outer filter sand medium 7 of described sand filter 4 is the rectangle metallic sieve of stainless steel wire braiding, and Aspect Ratio is 0.65 ~ 0.9, and the stainless steel wire diameter is 0.5 ~ 2.0mm, and the direction of rectangle length is along the axial direction of laser slotted pipe; The interior filter sand medium 8 of described sand filter 4 is the folding wave structure of the rectangle metallic sieve of stainless steel wire braiding.
Wherein, the both ends of stating outer filter sand medium 7, outside protective pipe 6 are sealed mutually by joint 5, and seal mutually with laser slotted screen pipe 9.The laser slotted of described laser slotted screen pipe 9 is the rectangle structure that staggers in the interval, and laser slotted screen pipe 9 two ends grow outside the plumb joint 5, and this grows part and is provided with connecting thread 10.The folding direction of the folding corrugated metal screen cloth of the interior filter sand medium 8 of described sand filter 4 is the direction along rectangular length, and crest and trough distance are 2.0 ~ 4.0mm, and two wave spaces are 2 ~ 5mm.Be provided with the opening of crossing of punching press formation on the described outside protective pipe 6.Outer filter sand medium 7 external surfaces are connected with outside protective pipe 6, and inner surface is connected with interior filter sand medium 8.Interior sand medium 8 external surfaces are connected with the first filter sand medium 7, and inner surface is connected with laser slotted screen pipe 9.
During operation; the present invention is lowered into horizontal oil reservoir well section with production string; laser slotted screen pipe 9 two ends of sand filter 4 are connected with sleeve pipe 1 respectively; outside protective pipe 6 external surfaces are close to oil reservoir 3, and laser slotted screen pipe 9 is connected with polynary sand control fluid course 3 in the production string 1 by outside protective pipe 6, outer filter sand medium 7, interior filter sand medium 8.Sand filter 4 is lowered to the well section place that horizontal well is right against oil reservoir.
Claims (7)
1. a Multi-element oil well screen comprises production string, sand filter, it is characterized in that described sand filter two ends are connected with sleeve pipe respectively, and the outside protective pipe of sand filter is close to oil reservoir, and the fluid course in laser slotted screen pipe and the production string is connected; The interior filter sand medium of described sand filter, outer filter sand medium, outside protective pipe are installed on the laser slotted screen pipe successively, and the both ends of interior filter sand medium, outer filter sand medium, outside protective pipe are equipped with plumb joint; The structure of the outer filter sand medium of described sand filter is the rectangle metallic sieve of stainless steel wire braiding, and Aspect Ratio is 0.65 ~ 0.9, and the stainless steel wire diameter is 0.5 ~ 2.0mm, and the direction of rectangle length is along the axial direction of laser slotted pipe; The interior filter sand medium of described sand filter is the folding wave structure of the rectangle metallic sieve of stainless steel wire braiding.
2. Multi-element oil well screen according to claim 1 is characterized in that the both ends of described outer filter sand medium, outside protective pipe are sealed mutually by joint, and seals mutually with laser slotted screen pipe.
3. profit requires 1 described Multi-element oil well screen, and the laser slotted that it is characterized in that described laser slotted screen pipe is the rectangle structure that staggers in the interval, and the laser slotted screen pipe two ends grow outside the plumb joint, and this grows part and is provided with connecting thread.
4. Multi-element oil well screen claimed in claim 1 is characterized in that the folding direction of folding corrugated metal screen cloth of the interior filter sand medium of described sand filter is the direction along rectangular length, and crest and trough distance are 2.0 ~ 4.0mm, and two wave spaces are 2 ~ 5mm.
5. according to Multi-element oil well screen claimed in claim 1, it is characterized in that being provided with on the described outside protective pipe opening of crossing of punching press formation.
6. according to Multi-element oil well screen claimed in claim 1, it is characterized in that described outer filter sand medium external surface is connected with outside protective pipe, inner surface is connected with interior filter sand medium.
7. according to claim 1 or 5 described polynary Petroleum screen tubes, it is characterized in that described interior filter sand medium external surface is connected with outer filter sand medium, inner surface is connected with laser slotted screen pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102618772A CN102979491A (en) | 2011-09-06 | 2011-09-06 | Multielement oil well screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102618772A CN102979491A (en) | 2011-09-06 | 2011-09-06 | Multielement oil well screen |
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| Publication Number | Publication Date |
|---|---|
| CN102979491A true CN102979491A (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102618772A Pending CN102979491A (en) | 2011-09-06 | 2011-09-06 | Multielement oil well screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452534A (en) * | 2013-09-13 | 2013-12-18 | 天津金顺科技发展有限公司 | Composite sand-preventing sieve pipe |
| CN103939060A (en) * | 2014-04-17 | 2014-07-23 | 江阴市星宇塑胶有限公司 | Water filter pipe and device thereof |
| CN109236186A (en) * | 2018-10-30 | 2019-01-18 | 中国石油大学(华东) | New well drilling casing and big wellbore multilateral well quick drill completion method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE31604E (en) * | 1970-10-02 | 1984-06-19 | Standard Oil Company (Indiana) | Multi-layer well screen |
| CN2238904Y (en) * | 1995-12-07 | 1996-10-30 | 李大全 | Anti-sand screen pipe |
| US6305468B1 (en) * | 1999-05-28 | 2001-10-23 | Baker Hughes Incorporated | Downhole screen and method of manufacture |
| CN201857944U (en) * | 2010-09-03 | 2011-06-08 | 杨恺 | Well completion sieve tube for thick oil horizontal well |
| CN201857943U (en) * | 2010-09-03 | 2011-06-08 | 张洪才 | Completion sieve tube for a horizontal steam stimulation well of heavy oil |
-
2011
- 2011-09-06 CN CN2011102618772A patent/CN102979491A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE31604E (en) * | 1970-10-02 | 1984-06-19 | Standard Oil Company (Indiana) | Multi-layer well screen |
| CN2238904Y (en) * | 1995-12-07 | 1996-10-30 | 李大全 | Anti-sand screen pipe |
| US6305468B1 (en) * | 1999-05-28 | 2001-10-23 | Baker Hughes Incorporated | Downhole screen and method of manufacture |
| CN201857944U (en) * | 2010-09-03 | 2011-06-08 | 杨恺 | Well completion sieve tube for thick oil horizontal well |
| CN201857943U (en) * | 2010-09-03 | 2011-06-08 | 张洪才 | Completion sieve tube for a horizontal steam stimulation well of heavy oil |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452534A (en) * | 2013-09-13 | 2013-12-18 | 天津金顺科技发展有限公司 | Composite sand-preventing sieve pipe |
| CN103939060A (en) * | 2014-04-17 | 2014-07-23 | 江阴市星宇塑胶有限公司 | Water filter pipe and device thereof |
| CN103939060B (en) * | 2014-04-17 | 2017-09-12 | 江阴市星宇塑胶有限公司 | One kind takes gravel drainage tube preparation method |
| CN109236186A (en) * | 2018-10-30 | 2019-01-18 | 中国石油大学(华东) | New well drilling casing and big wellbore multilateral well quick drill completion method |
| CN109236186B (en) * | 2018-10-30 | 2020-03-06 | 中国石油大学(华东) | Well drilling casing and rapid well drilling and completion method for multilateral well of large well |
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Application publication date: 20130320 |