CN101775977B - Dual-tube injection well safety production string - Google Patents
Dual-tube injection well safety production string Download PDFInfo
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- CN101775977B CN101775977B CN201010102534.7A CN201010102534A CN101775977B CN 101775977 B CN101775977 B CN 101775977B CN 201010102534 A CN201010102534 A CN 201010102534A CN 101775977 B CN101775977 B CN 101775977B
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Abstract
The invention provides a dual-tube injection well safety production string. The dual-tube injection well safety production string comprises a ground control system, a fluid control pipeline, an annular safety valve, an annular packer, a positioning fillup valve, a pressure terminal, a string, an injection safety valve, a layered packer, an fillup valve, a plug, a bottom sand filtering pipe, an anchor, a sand control packer, a sand control screen, a sand control string, a casing string and a water injection string, wherein the upper part of the water injection string is arranged in the casing string, while the lower part is arranged in the sand control string; the sand control string is arranged in the casing string; the upper part of the sand control string is provided with a hanging packer, the middle part of the sand control string is provided with the sand control screen, a sand control packer and a sand control screen in turn, and the lower part of the sand control string is provided with an anchoring device, the bottom sand filtering pipe and the plug connected in turn; the water injection string is provided with the annular safety valve, the annular packer, the positioning fillup valve, the pressure terminal, the injection safety valve, the injection layered packer and the fillup valve in turn; and the annular safety valve is connected with a ground hydraulic control system through the fluid control pipeline. The dual-tube injection well safety production string has the characteristics of convenient and precise deployment, large drift diameter of injection and injection allocation, no risk of throwing and fishing, safe production, low shearing, environmental protection and the like, and is widely used in separate zone water injection process of oil production.
Description
One, technical field
The present invention relates to oil exploitation downhole water injection string, particularly a kind of dual-tube injection well safety production string.
Two, background technology
Layered water injection process pipe column is an important process in oil exploitation, traditional water injection technological string is generally single tube dispensing, its structure is on single tube water injection string, to install to connect dispensing instrument, this water injection technological string is being brought into play and is being acted on for oil exploitation always, but this water injection string structure exists following shortcoming or deficiency: 1. layering dispensing is imprecise, dispensing weak effect; 2. multi-zone flow regulating amount is inaccurate, and layering dispensing does not reach requirement; 3. for sea one or offshore oil field, cannot ensure its safe dispensing production and environmental requirement.
Three, summary of the invention
The object of this invention is to provide a kind of dual-tube injection well safety production string, adopt two-tube independent dispensing structure, dispensing is definite, and minute fluence is accurate, conform to maritime safety and produce and environmental requirement, the shortcoming or the deficiency that effectively overcome or avoid existing in above-mentioned prior art.
Dual-tube injection well safety production string of the present invention, comprises ground control system, liquid controling pipe line, annulus safety valve, annular packer, location injection valve, sealing plug, injection safety valve, injects layer separating packer, injection valve, plug, bottom sand screen, anchor, sand control packer, sand control screen, sand control pipe, casing string and water injection string.Described water injection string top is installed in casing string, and bottom is installed in sand control pipe.Sand control pipe is installed in casing string.Sand control pipe top is provided with hanging packer, and middle part is installed in turn and is connected with sand control screen, sand control packer, sand control screen, and bottom is connected with anchoring device, bottom sand screen, plug in turn.Annulus safety valve, annular packer, location injection valve, sealing plug, injection safety valve are installed on water injection string in turn, inject layer separating packer, injection valve and plug, between annulus safety valve and ground control system, by liquid controling pipe line, be connected.
Wherein, described water injection string is the variable-diameter structure that upper diameter is large, lower diameter is little, top is provided with annulus safety valve, annular packer and location injection valve, sealing plug is installed in the injection valve of location, middle part is provided with injects safety valve, injection layer separating packer, injection valve, and lower end is provided with plug.Described sealing plug top is through annulus safety valve, and bottom is connected with location injection valve.
The present invention compared with prior art tool has the following advantages:
1, multi-zone flow regulating is controlled, allocates convenient, accurate at wellhead ground;
2, dispensing injection allocation latus rectum is large, is applicable to large discharge capacity water filling demand;
3, without pulling risk, safety in production;
4, meet the low shearing requirement that layering dispensing is injected polymer;
5, meet dispensing and the environmental requirement of sea or offshore oil field.
Four, accompanying drawing explanation
Accompanying drawing is a kind of example structure schematic diagram of the present invention
Five, the specific embodiment
Consult accompanying drawing, a dual-tube injection well safety production string, comprises ground control system 1, liquid controling pipe line 2, annulus safety valve 3, annular packer 4, location injection valve 5, sealing plug 6, tubing string, injection safety valve 7, injects layer separating packer 8, injection valve 9, plug 10, bottom sand screen 11, anchor 12, sand control packer 14, sand control screen 15, sand control pipe 13, casing string 20 and water injection string 19.Water injection string 19 tops are installed in casing string 20, and bottom is installed in sand control pipe 13.Sand control pipe 13 is installed in casing string 20.Sand control pipe 13 tops are provided with hanging packer 16, and middle part is installed in turn and is connected with sand control screen 15, sand control packer 14, sand control screen 15, and bottom is connected with anchoring device 12, bottom sand screen 11, plug 10 in turn.Annulus safety valve 3, annular packer 4, location injection valve 5, sealing plug 6 are installed on water injection string 19 in turn, inject safety valve 7, note people's layer separating packer 8, injection valve 9 and plug 10, between annulus safety valve 3 and ground control system 1, by liquid controling pipe line 2, be connected.
Wherein, described water injection string 19 is the variable-diameter structure that upper diameter is large, lower diameter is little, and top is provided with annulus safety valve 3, annular packer 4 and location injection valve 5, and sealing plug 6 is installed in the injection valve 5 of location.Middle part is provided with injects safety valve 7, injection layer separating packer 8, injection valve 9, and lower end is provided with plug 10.Described sealing plug 6 tops are through annulus safety valve 3, and bottom is connected with location injection valve 5.Described anti-sand control pipe 13 tops are installed and are connected with hanging packer 16, and middle part is provided with sand control screen 15, sand control packer 14, and bottom is provided with anchoring device 12, bottom sand screen 11, plug 10.
When water filling occurs when abnormal, the interior hydraulic pressure automatically unloading of liquid controling pipe line 2, annulus safety valve 3 under the effect of mechanism, the two-tube annular space 17 of automatic-sealed dispensing; While stopping noting, inject safety valve 7 also under the effect of spring, piston retraction, center valve plate is closed automatically, works with annular packer 4 one simultaneously, realizes automatically closing of whole pit shaft under abnormal conditions, meets maritime safety environmental requirement.
During normal injection, ground control system 1, by 3 pressurizations of 2 pairs of annulus safety valves of liquid controling pipe line, is opened the annular space airtight passage 18 of annulus safety valve 3, and the flow through annulus access of annulus safety valve 3 of injection liquid is downward, by location injection valve 5, through sand screen 15, carry out upper strata oil reservoir dispensing; The injection safety valve 7 of sand control pipe 13 is opened under the pressure that injects hydraulic pressure, injects fluid by injecting safety valve 7, injection valve 9, sand screen 15, realizes lower floor's oil reservoir dispensing.
During anti-circulation well cleanup, flushing fluid, by oil jacket annular space, annular packer 4, location injection valve 5, enters the two-tube annular space 17 of dispensing, annulus safety valve 3, until return to ground, realizes and cleans the two-tube annular space 17 of dispensing and annular space airtight passage 18; During direct flushing, be that flushing fluid passes through center inner tube, injects after safety valve 7, injection valve 9, enter in the annular space 18 of sand-proof pipe and dispensing pipe, again by injecting layer separating packer 8, annular packer 4, until return to ground ，Shi center inner tube and sand control pipe, water injection string is able to safe cleaning.
Claims (3)
1. a dual-tube injection well safety production string, comprise ground control system, liquid controling pipe line, annulus safety valve, annular packer, location injection valve, sealing plug, inject safety valve, layer separating packer, injection valve, plug, bottom sand screen, anchor, sand control packer, sand control screen, sand control pipe, casing string and water injection string, it is characterized in that described water injection string top is installed in casing string, bottom is installed in sand control pipe, sand control pipe is installed in casing string, sand control pipe top is provided with hanging packer, middle part is installed and is connected with sand control screen in turn, sand control packer, sand control screen, bottom in turn with anchoring device, bottom sand screen, plug is connected, annulus safety valve is installed on water injection string in turn, annular packer, location injection valve, inject safety valve, inject layer separating packer, injection valve and plug, between annulus safety valve and ground control system, by liquid controling pipe line, be connected.
2. dual-tube injection well safety production string according to claim 1, it is characterized in that described water injection string is the variable-diameter structure that upper diameter is large, lower diameter is little, top is provided with annulus safety valve, annular packer and location injection valve, sealing plug is installed in the injection valve of location, middle part is provided with injects safety valve, injection layer separating packer, injection valve, and lower end is provided with plug.
3. dual-tube injection well safety production string according to claim 1 and 2, is characterized in that described sealing plug top is through annulus safety valve, and bottom is connected with location injection valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102534.7A CN101775977B (en) | 2010-01-22 | 2010-01-22 | Dual-tube injection well safety production string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102534.7A CN101775977B (en) | 2010-01-22 | 2010-01-22 | Dual-tube injection well safety production string |
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| Publication Number | Publication Date |
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| CN101775977A CN101775977A (en) | 2010-07-14 |
| CN101775977B true CN101775977B (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010102534.7A Expired - Fee Related CN101775977B (en) | 2010-01-22 | 2010-01-22 | Dual-tube injection well safety production string |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953716A (en) * | 2011-08-19 | 2013-03-06 | 中国石油天然气集团公司 | Parallel double-tube separate layer water injection string |
| CN104234671A (en) * | 2014-09-23 | 2014-12-24 | 中国石油天然气股份有限公司 | Water-gathering co-well layering co-charging process tubular column |
| CN104948149B (en) * | 2015-07-06 | 2016-06-29 | 东北石油大学 | A kind of multimedium dispensing system suitable in mining site complexity oil reservoir |
| CN106437641B (en) * | 2015-08-11 | 2018-12-04 | 中国石油化工股份有限公司 | The long-acting two-tube water injection string of independent safety |
| CN105422057A (en) * | 2015-12-31 | 2016-03-23 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-low permeable reservoir or dense reservoir |
| CN105545272B (en) * | 2015-12-31 | 2018-06-01 | 中国石油天然气股份有限公司 | The oil production method of extra-low permeability water-sensitive reservoir/compact reservoir |
| CN106401537A (en) * | 2016-11-16 | 2017-02-15 | 中国石油大学(华东) | Well completion pipe string of underground gas storage well and well completion method |
| CN106677749A (en) * | 2017-01-04 | 2017-05-17 | 中国海洋石油总公司 | Pipe pillar of multi-pipe injecting and washing technique of well controlling and inverse well-flushing integration |
| CN108979572B (en) * | 2018-07-26 | 2020-09-04 | 中国石油天然气股份有限公司 | Combined anti-pollution sand washing device and method |
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| US6283215B1 (en) * | 1998-06-11 | 2001-09-04 | Institut Francais Du Petrole | Process for thermal insulation of production tubings placed in a well by means of a non-rigid foam and a system for working a fluid producing well |
| CN1793606A (en) * | 2005-12-24 | 2006-06-28 | 中国石化胜利油田有限公司采油工艺研究院 | Separate layer gas injection tube pile |
| CN101059073A (en) * | 2007-05-11 | 2007-10-24 | 大庆油田有限责任公司 | Same-well double-medium synchronous separate injection tubing string tool and its separate injection method |
| CN201416430Y (en) * | 2009-01-16 | 2010-03-03 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Hydraulic controlled type concentric dual-pipe separate injection pipe string |
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2010
- 2010-01-22 CN CN201010102534.7A patent/CN101775977B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283215B1 (en) * | 1998-06-11 | 2001-09-04 | Institut Francais Du Petrole | Process for thermal insulation of production tubings placed in a well by means of a non-rigid foam and a system for working a fluid producing well |
| CN1793606A (en) * | 2005-12-24 | 2006-06-28 | 中国石化胜利油田有限公司采油工艺研究院 | Separate layer gas injection tube pile |
| CN101059073A (en) * | 2007-05-11 | 2007-10-24 | 大庆油田有限责任公司 | Same-well double-medium synchronous separate injection tubing string tool and its separate injection method |
| CN201416430Y (en) * | 2009-01-16 | 2010-03-03 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Hydraulic controlled type concentric dual-pipe separate injection pipe string |
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| CN101775977A (en) | 2010-07-14 |
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