CN101775977A - Dual-tube injection well safety production string - Google Patents
Dual-tube injection well safety production string Download PDFInfo
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- CN101775977A CN101775977A CN 201010102534 CN201010102534A CN101775977A CN 101775977 A CN101775977 A CN 101775977A CN 201010102534 CN201010102534 CN 201010102534 CN 201010102534 A CN201010102534 A CN 201010102534A CN 101775977 A CN101775977 A CN 101775977A
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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 and an injection layered packer, and the lower part of the sand control string is provided with an anchoring device, the bottom sand filtering pipe and the plug; 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, the fillup valve and the plug 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 underground water-injection tubing string, particularly a kind of dual-tube injection well safety production string,
Two, background technology
The stratified injection water technology tubing string is an important process in the oil exploitation, traditional water injection technology tubing string is generally the single tube dispensing, its structure is to install on the single tube water injection string to connect the dispensing instrument, this water injection technology tubing string is being brought into play for oil exploitation always and is being acted on, but this water injection string structure exists following shortcoming or deficiency: 1. layering dispensing is imprecise, the dispensing weak effect; 2. the multi-zone flow regulating amount is inaccurate, and the layering dispensing does not reach requirement; 3. can't ensure its safe dispensing production and environmental requirement for sea one or offshore oil field.
Three, summary of the invention
The purpose 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, divides fluence accurate, conform to maritime safety production and environmental requirement, the shortcoming or the deficiency that overcome effectively or avoid existing in the above-mentioned prior art.
Dual-tube injection well safety production string of the present invention, a kind of two-tube minute post well safety in production tubing string, comprise ground control system, liquid controling pipe line, annulus safety valve, the annular space packer, the location injection valve, sealing plug, tubing string, inject safety valve, layer separating packer, injection valve, plug, the bottom sand screen, anchor, sand control packer, sand control screen, sand control pipe, casing string and water injection string, water injection string top is installed in the casing string, the bottom is installed in the sand control pipe, and described sand control pipe top is equipped with the sand control packer bottom and is connected with anchoring device.Annulus safety valve, annular space packer, location injection valve, sealing plug, injection safety valve are installed on the water injection string in turn, annotate people's layer separating packer, injection valve and plug, be connected by liquid controling pipe line between annulus safety valve and the ground hydraulic control system.
Wherein, described water injection string is the variable-diameter structure that upper diameter is big, lower diameter is little, top is equipped with annulus safety valve and annular space packer, and the middle part is equipped with sealing plug, injects safety valve, injects layer separating packer, injects safety valve, injection valve, and the lower end is equipped with plug.Described sealing plug bottom is connected with the location injection valve, and annulus safety valve is passed on top.Sand control pipe top is equipped with hanging packer, and the middle part is equipped with sand control screen, sand control packer, and the bottom is equipped with anchoring device and bottom sand screen and plug.
The present invention has following advantage compared with prior art:
1, multi-zone flow regulating is convenient, accurate in well head Ground Control, allotment;
2, dispensing injection allocation latus rectum is big, is fit to big discharge capacity water filling demand;
3, no pulling risk, safety in production;
4, satisfy the low shearing requirement that the layering dispensing is injected polymer;
5, satisfy the dispensing and the environmental requirement of sea or offshore oil field.
Four, description of drawings
Accompanying drawing is a kind of example structure schematic diagram of the present invention
Five, the specific embodiment
Consult accompanying drawing, a kind of dual-tube injection well safety production string comprises ground control system 1, liquid controling pipe line 2, annulus safety valve 3, annular space 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 the casing string 20, and the bottom is installed in the sand control pipe 13.Sand control pipe 13 is installed in the casing string 20.Sand control pipe 13 tops are equipped with hanging packer 16, and the bottom is connected with anchoring device 12.Annulus safety valve 3, annular space packer 4, location injection valve 5, sealing plug 6 are installed on the water injection string 19 in turn, inject safety valve 7, annotate people's layer separating packer 8, injection valve 9 and plug 10.Be connected by liquid controling pipe line 2 between annulus safety valve 3 and the ground hydraulic control system 1.
When water filling takes place when unusual, hydraulic pressure automatically unloadings in the liquid controling pipe line 2, annulus safety valve 3 is under the effect of mechanism, from the two-tube annular space 17 of movable sealing dispensing; When stopping annotating, also under the effect of spring, piston bounces back injection safety valve 7, and the center valve plate is closed automatically, works with annular space packer 4 one simultaneously, and the maritime safety environmental requirement is satisfied in closing automatically of the whole pit shaft under the realization abnormal conditions.
During normal the injection, ground control system 1 is opened the annular space airtight passage 18 of annulus safety valve 3 by 3 pressurizations of 2 pairs of annulus safety valves of liquid controling pipe line, and it is downward to inject the flow through annulus access of annulus safety valve 3 of liquid, by location injection valve 5, carry out upper strata oil reservoir dispensing through sand screen 15; 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 enters the two-tube annular space 17 of dispensing, annulus safety valve 3 by oil jacket annular space, annular space packer 4, location injection valve 5, until returning ground, realizes cleaning two-tube annular space 17 of dispensing and annular space airtight passage 18; During direct flushing, after being intracardiac pipe during flushing fluid passes through, injection safety valve 7, injection valve 9, enter in the annular space 18 of anti-sandpipe and dispensing pipe, again by injecting layer separating packer 8, annular space packer 4, intracardiac pipe and sand control pipe, water injection string are able to safe cleaning in returning ground, making.
Claims (4)
1. dual-tube injection well safety production string, comprise ground control system, liquid controling pipe line, annulus safety valve, annular space packer, location injection valve, sealing plug, tubing string, injection 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, water injection string top is installed in the casing string, the bottom is installed in the sand control pipe, sand control pipe is installed in the casing string, described sand control pipe top is equipped with sand control packer, and the bottom is connected with anchoring device.Annulus safety valve, annular space packer, location injection valve, sealing plug, injection safety valve are installed on the water injection string in turn, annotate people's layer separating packer, injection valve and plug, be connected by liquid controling pipe line between annulus safety valve and the ground hydraulic control system.
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 big, lower diameter is little, top is equipped with annulus safety valve and annular space packer, the middle part is equipped with sealing plug, injects safety valve, injects layer separating packer, injects safety valve, injection valve, and the lower end is equipped with plug.
3. dual-tube injection well safety production string according to claim 1 and 2 is characterized in that described sealing plug bottom is connected with the location injection valve, and annulus safety valve is passed on top.
4. dual-tube injection well safety production string according to claim 1 is characterized in that described sand control pipe top is equipped with hanging packer, and the middle part is equipped with sand control screen, sand control packer, and the bottom is equipped with anchoring device and bottom sand screen and plug.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101775977A true CN101775977A (en) | 2010-07-14 |
| CN101775977B 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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Cited By (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 same-well layering same-injection process pipe column |
| CN104948149A (en) * | 2015-07-06 | 2015-09-30 | 东北石油大学 | Multi-media separated injection system suitable for mine field complex oil reservoir |
| 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 permeability oil reservoir or compact oil reservoir |
| CN105545272A (en) * | 2015-12-31 | 2016-05-04 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-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 |
| CN106437641A (en) * | 2015-08-11 | 2017-02-22 | 中国石油化工股份有限公司 | Independent safe long-acting double-pipe water injection pipe column |
| 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 |
| CN108979572A (en) * | 2018-07-26 | 2018-12-11 | 中国石油天然气股份有限公司 | Combined anti-pollution sand washing device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2779801B1 (en) * | 1998-06-11 | 2000-07-21 | Inst Francais Du Petrole | PROCESS FOR THERMAL INSULATION OF PRODUCTION TUBINGS PLACED IN A WELL BY MEANS OF NON-RIGID FOAM |
| CN100343480C (en) * | 2005-12-24 | 2007-10-17 | 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 |
| CN100526599C (en) * | 2007-05-11 | 2009-08-12 | 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 |
-
2010
- 2010-01-22 CN CN201010102534.7A patent/CN101775977B/en not_active Expired - Fee Related
Cited By (13)
| 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 same-well layering same-injection process pipe column |
| CN104948149A (en) * | 2015-07-06 | 2015-09-30 | 东北石油大学 | Multi-media separated injection system suitable for mine field complex oil reservoir |
| 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 |
| CN106437641A (en) * | 2015-08-11 | 2017-02-22 | 中国石油化工股份有限公司 | Independent safe long-acting double-pipe water injection pipe column |
| 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 |
| CN105545272B (en) * | 2015-12-31 | 2018-06-01 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-low permeability water-sensitive reservoir/compact reservoir |
| CN105545272A (en) * | 2015-12-31 | 2016-05-04 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-low permeability water-sensitive reservoir/compact reservoir |
| 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 permeability oil reservoir or compact oil 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 |
| CN108979572A (en) * | 2018-07-26 | 2018-12-11 | 中国石油天然气股份有限公司 | Combined anti-pollution sand washing device and method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101775977B (en) | 2014-03-05 |
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