CN203081411U - Antiseptic, anti-scale and gas-lift integral completion pipe string - Google Patents
Antiseptic, anti-scale and gas-lift integral completion pipe string Download PDFInfo
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- CN203081411U CN203081411U CN 201220676773 CN201220676773U CN203081411U CN 203081411 U CN203081411 U CN 203081411U CN 201220676773 CN201220676773 CN 201220676773 CN 201220676773 U CN201220676773 U CN 201220676773U CN 203081411 U CN203081411 U CN 203081411U
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Abstract
The utility model discloses an antiseptic, anti-scale and gas-lift integral completion pipe string, and is designed for making tubular piles to have antiseptic, anti-scale and oil deposit protecting functions. The completion pipe string is arranged in a sleeve, and is connected with each level of gas-lift working barrel with gas-lift valves, each level of chemical injection working barrel with chemical injection valves, matched telescopic short sections, sliding sleeves, sealing inserting pipes, packers, centralizers, landing nipples and pipe sockets from top to bottom through oil pipes in sequence. The antiseptic, anti-scale and gas-lift integral completion pipe string can achieve five functions of gas-lift oil extraction production, anticorrosion, antiscale, later stage well tubular pile flushing and no-killing operation, can achieve tubular pile well flushing and no-killing operation once, can avoid leakage of inflow liquid, improves well flushing quality, reduces oil reservoir pollution, and protects the oil reservoir. The antiseptic, anti-scale and gas-lift integral completion pipe string is high in production time efficiency, small in number of matched devices, strong in maneuverability, reliable in process, simple in operation mode, long in service life of tubular piles, and wide in gas-lift application range.
Description
Technical field
The utility model relates to a kind of anti-corrosion anti-scale and the integrated completion tubular column of gaslift, belongs to oil well completion and production technical field.
Background technology
Conventional gaslift flow string only is used for completion production, does not consider supporting anti-corrosion anti-scale measure.Oil well produced water can form corrosion and scaling at the production tube inwall, when seriously arriving to a certain degree, can cause flow string to lose efficacy, and has a strong impact on gas-lift well output.Also to carry out construction maintenance, significantly improve cost for oil production, reduce productivity effect.Fouling is generally adopted heat to wash operation and is solved, and for the oil well that adopts conventional gas-lift production mode, heat is washed or the tubing string maintenance can cause a large amount of working fluids to enter the stratum, influences heat and washes quality or kill-job measure, prolongs the discharge opeing cycle, incurs loss through delay production capacity and recovers, and pollutes oil reservoir.
Summary of the invention
The purpose of this utility model is to provide a kind of anti-corrosion anti-scale and the integrated completion tubular column of gaslift, and this tubing string also possesses the function of anti-corrosion anti-scale and protection oil reservoir when possessing the gas-lift production function.
Concrete technology contents of the present utility model is as follows:
This completion tubular column is located in the sleeve pipe, and it connects the gaslift seating nipple of band gas lift valves at different levels from top to bottom successively by oil pipe; Seating nipple is injected by the chemistry that oil pipe connects the chemical injection valve of bands at different levels successively in final stage gaslift seating nipple lower end; Chemistry injects the seating nipple lower end and connects supporting Telescopic short piece by oil pipe; The Telescopic short piece lower end connects sliding sleeve by oil pipe; The sliding sleeve lower end connects the sealing intubate by oil pipe, and sealing intubate lower end is directly inserted in the packer; The packer lower end connects centralizer; The centralizer bottom connects landing nipple by oil pipe; Seat is put the pipe nipple lower end and is connected horn mouth by oil pipe.
Advantage of the present utility model is to realize gas-lift production production, anticorrosion, antiscale and later stage Flushing tubular column and five functions of snubbing serving; can realize one-trip string well-flushing and snubbing serving, can avoid the working fluid leakage, improve the well-flushing quality; reduce oil layer pollution, the protection oil reservoir.Production timeliness height, corollary equipment is few, and is workable, and technology is reliable, and operating type is simple, and the tubing string life-span is long, the gaslift applied range.
Description of drawings
Fig. 1 is the integrated completion tubular column structural representation of anti-corrosion anti-scale and gaslift.
Fig. 2 is a gaslift seating nipple structural representation.
The specific embodiment
Embodiment:
With reference to Fig. 1 and 2 embodiment of the present utility model is further specified:
This completion tubular column is located in the sleeve pipe, and it connects the gaslift seating nipple 2 of (present embodiment is a two-stage) at different levels band gas lift valve from top to bottom successively by oil pipe 1; Final stage gaslift seating nipple 2 lower ends connect (present embodiment is a two-stage) at different levels chemistry injection seating nipple 3 with chemical injection valve successively by oil pipe 1; Chemistry injects seating nipple 3 lower ends and connects supporting Telescopic short piece 4 by oil pipe 1; Telescopic short piece 4 lower ends connect sliding sleeve 5 by oil pipe 1; Sliding sleeve 5 lower ends connect sealing intubate 6 by oil pipe 1, and directly insert in the packer 7 of retrievable the intubate lower end; Packer 7 lower ends connect centralizer 8; Centralizer 8 bottoms connect landing nipple 9 by oil pipe 1; Seat is put pipe nipple 9 lower ends and is connected horn mouth 10 by oil pipe 1.
The eccentric installation tube 21 and oil pipe 1 decentraction of KPX-140,168 large scale gaslift seating nipples 2, both center lines are at a distance of the 10-20 millimeter, be provided with valve bag 22 in the eccentric installation tube 21, be provided with corrosion-resistant gas lift valve 23 in the valve bag 22, between the inner chamber of valve bag 22 and eccentric installation tube 21 fluid passage is arranged, injecting gas injects flow string by the aperture on eccentric installation tube 21 and the corrosion-resistant gas lift valve 23 from annular space.
The valve bag inside that chemistry injects seating nipple 3 is equipped with chemical injection valve, is connected with oil pipe, and injection valve injects pipeline by the 3/8in stainless steel and is connected with the injection pump of well head, and the circulation passage of production tube is provided.
The function of each connection device of this completion tubular column is as follows:
1) gaslift seating nipple: the main effect of gaslift seating nipple is to provide working material for gas lift valve, be used for gas-lift well off-load and control gas injection rate and gas injection pressure, reach the purpose of lifting down-hole liquid, relevant parameters such as its progression and the degree of depth are determined by the gaslift technological design.Seating nipple possesses enough flow channels, is consistent with latus rectum in the supporting oil pipe, and under the condition that keeps latus rectum, satisfies the completion requirement of bearing 35MPa.
2) chemistry injects seating nipple: chemistry injects working barrel valve bag inside and is provided with the chemical injection valve that is connected with oil pipe, and it is connected with the injection pump of well head by pipeline, and is provided to the circulation passage of production tube.This seating nipple drops into chemical injection valve in the valve bag hole by steel wire operation or pulls out from valve bag hole, can guarantee the effect of chemical injected system for a long time, prolongs the period of validity of tubing string.
3) Telescopic short piece: be used to regulate that Yin Wendu or pressure change and the variation of the tubing length that causes is avoided changing the excessive danger that occurs because of axial load.But its cooperative mechanical or hydraulic packer use, and are applicable to various well stimulation operations such as pressure break, acidifying, also can be widely used in water filling and gas injection and various well-completing process.
4) sliding sleeve:, be used for kill-job or well-flushing for tubing string provides circulation canal.Sliding sleeve is provided with the interior cover and the overcoat of band circulation port, drags interior cover up and down by the steel wire operation string that has special-purpose shifting tool, can repeatedly open and close sliding sleeve, for setting up passage between sleeve pipe and the oil pipe.
5) sealing intubate: lower tubular column in the connection, realize locking and sealing simultaneously.On the sealing intubate detent mechanism is set, can prevents that the oil well intubate breaks away from packer; When playing oil pipe, rotatable or directly on carry flow string, make the sealing intubate break away from packer, operation is convenient.
6) packer: packer has slips and the cartridge that is used for fastening sleeve pipe and Seal Oil cover annular space.During production, the gas that intercepts in the annular space directly enters oil pipe from pin, avoids the pin air inlet; Avoid working fluid to enter the stratum, intercept on the formation oil gas and gush, realize snubbing serving from the oil jacket annular space.During the packer deblocking, can adopt special-purpose deblocking instrument.
7) centralizer: the last lower tubular column that is used to connect, support and set upright packer; centralizer body external diameter and casing inner diameter are consistent; make the elasticity centralizer body break away from the radial effect power of internal surface of sleeve pipe greater than the radial effect power of inclined shaft completion tubular column to sleeve pipe; guarantee that packer all is in the middle position in the inclined shaft under freedom and duty; make packer not be subjected to the influence of hole deviation, protecting packer.
8) seat is put pipe nipple: similar tubing nipple, be provided with lock slots and positioning step, and for flow control tools such as ball-and-seat and blanking plug provide carrier, intercept working fluid and enter the stratum or prevent that formation oil gas from gushing from oil pipe.
9) horn mouth: enough big internal diameter is arranged, ganged up to make things convenient for testing tool.
The operation and the course of work of this completion tubular column are as follows:
One, is lowered to this completion tubular column
1) be lowered to tubing strings such as horn mouth 10, landing nipple 9, centralizer 8, packer 7 and setting tool, behind design attitude, the pitching set packer is also given up at packer 7, trips out the above tubing string of giving up from bottom to up;
2) be lowered to sealing intubate 6 and above tubing string, 5 tons of the back tests that put in place under the tubing string are carried 3 tons on again, confirm that sealing intubate 6 inserts packers 7, and test is 3 tons again, is seated in tubing hanger, and well head is installed, and then, well head is carried out pressure testing, begins gaslift after pressure testing is qualified and goes into operation;
3) utilize on-the-spot gaslift surface line to introduce source of the gas, to the gas injection of oil jacket annular space from compressor station;
4) flow line imports relief line, controls gas injection speed simultaneously, and annulus liquid level is descended, and down-hole gas lift valve 23 comes out step by step, by its gas injection in oil pipe 1.Injecting gas mixes with fluid in the pit shaft, has reduced the fluid density in the pit shaft, and well liquid is lifted to ground, reaches the purpose of well killing fluid in the emptying well;
5) after annulus liquid level dropped to the last level work valve position, gaslift system stability, well killing fluid return row to be finished, and pours the ground flow line into production system, beginning oil well gaslift steady production;
6) carry out injection pump at well head and inject being connected of seating nipple 3, inject corresponding chemical agent, be implemented in and realize the anti-corrosion anti-scale operation when gaslift is produced according to scheme with chemistry.
Two, oil well clean-out service
Oil well though the chemistry of supporting anti-corrosion anti-scale injects seating nipple 3, needs well-flushing after long-time production after producing a period of time.This completion tubular column can avoid flushing fluid to enter the stratum, improves well-flushing efficient, avoids oil layer pollution.Well-flushing is realized by following steps:
1) drops into ball-and-seat in the pipe nipple 9 by present the putting of steel wire operation, can intercept flushing fluid and enter the stratum;
2) be lowered to special-purpose shifting tool by steel wire operation and open sliding sleeve 5, the well-flushing passage is provided;
3) flushing fluid injects from the oil jacket annular space, flows into oil pipe 1 through sliding sleeve 5 and enters ground flow; Be subjected to the obstruct of ball-and-seat and packer 7, flushing fluid can not enter the stratum, thereby effectively improves well-flushing efficient, and the protection oil reservoir is avoided the pollution that causes because of kill job;
4) pull ball-and-seat out and close sliding sleeve 5 by steel wire operation, recover the oil well gaslift and produce.
Three, snubbing serving
After certain time limit of oil well work, because the variation of reservoir geology, the position of operating valve need redefine, and this just needs workover treatment, to change tubing string.The step of not kill-job of the utility model workover treatment is as follows:
1) drops into blanking plug in the pipe nipple 9 by present the putting of steel wire operation, close the flow channels of stratum and oil pipe;
2) from oil jacket annular space and oil pipe emptying simultaneously.After the emptying, well killing fluid is injected by annular space, flows into oil pipe through gas lift valve, returns liquid until oil pipe.Close the production tree main gate valve, build the pressure to 10MPa from annular space, voltage stabilizing 30 minutes, if pressure drop less than 0.5MPa, illustrates that blanking plug and packer sealing are good, and release.Because the iris action of blanking plug and packer 7, working fluid can not enter the stratum, and stratum liquid or gas do not gush on not understanding yet, thereby realizes snubbing serving, effectively protects oil reservoir and improves the production capacity resume speed;
3) in packer 7, trip out sealing intubate 6 and above tubing string by rotation and upper lifting pipe post, keep packer 7 and reach with lower tubular column;
4) be lowered to tubing string after the renewal according to designing requirement, will seal intubate 9 and insert packers 7, well head and surface line are installed;
5) pull blanking plug out by steel wire operation, gaslift operation completion.
Claims (2)
1. anti-corrosion anti-scale and the integrated completion tubular column of gaslift is characterized in that:
Tubing string is located in the sleeve pipe, it connects the gaslift seating nipple (2) of band gas lift valves at different levels from top to bottom successively by oil pipe (1), seating nipple (3) is injected by the chemistry of oil pipe (1) connecting band chemistry injection valve in final stage gaslift seating nipple (2) lower end, chemistry injects seating nipple (3) lower end and connects supporting Telescopic short piece (4) by oil pipe (1), Telescopic short piece (4) lower end connects sliding sleeve (5) by oil pipe (1), connect sealing intubate (6) in sliding sleeve (5) lower end by oil pipe (1), directly insert in the packer (7) sealing intubate (6) lower end, packer (7) lower end connects centralizer (8), centralizer (8) bottom connects landing nipple (9) by oil pipe (1), and seat is put pipe nipple (9) lower end and connected horn mouth (10) by oil pipe (1).
2. anti-corrosion anti-scale as claimed in claim 1 and the integrated completion tubular column of gaslift is characterized in that packer (7) is the retrievable packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676773 CN203081411U (en) | 2012-12-10 | 2012-12-10 | Antiseptic, anti-scale and gas-lift integral completion pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676773 CN203081411U (en) | 2012-12-10 | 2012-12-10 | Antiseptic, anti-scale and gas-lift integral completion pipe string |
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| Publication Number | Publication Date |
|---|---|
| CN203081411U true CN203081411U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220676773 Expired - Fee Related CN203081411U (en) | 2012-12-10 | 2012-12-10 | Antiseptic, anti-scale and gas-lift integral completion pipe string |
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| CN (1) | CN203081411U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033139A (en) * | 2014-06-20 | 2014-09-10 | 中国石油化工股份有限公司 | Corrosion and leakage preventing production pipe column of CO2 oil displacement injection well |
| CN106522887A (en) * | 2015-09-15 | 2017-03-22 | 中国石油化工股份有限公司 | Well completion pipe string used for horizontal well |
| CN108457601A (en) * | 2018-04-10 | 2018-08-28 | 山东普瑞思德石油技术有限公司 | Gas-lift production one plows completion tubular column and technique |
| CN110952963A (en) * | 2019-10-30 | 2020-04-03 | 中国石油化工股份有限公司 | Structure and method for producing tubular column with pressing-down gas lift |
| CN112081535A (en) * | 2019-06-14 | 2020-12-15 | 中国石油化工股份有限公司 | Ultra-deep high-sulfur-content gas well completion pipe string and construction method thereof |
| CN112253059A (en) * | 2020-10-19 | 2021-01-22 | 中建四局土木工程有限公司 | Central well completion pipe string for gas lift production and gas lift construction method |
| CN112647857A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Injection-production string and well completion method using same |
| CN114562240A (en) * | 2022-03-04 | 2022-05-31 | 中海石油(中国)有限公司 | Bypass gas lift working barrel for oil and gas field |
| CN114562241A (en) * | 2022-03-04 | 2022-05-31 | 中海石油(中国)有限公司 | Bypass continuous pipe gas injection gas lift pipe column system |
-
2012
- 2012-12-10 CN CN 201220676773 patent/CN203081411U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033139A (en) * | 2014-06-20 | 2014-09-10 | 中国石油化工股份有限公司 | Corrosion and leakage preventing production pipe column of CO2 oil displacement injection well |
| CN106522887A (en) * | 2015-09-15 | 2017-03-22 | 中国石油化工股份有限公司 | Well completion pipe string used for horizontal well |
| CN108457601A (en) * | 2018-04-10 | 2018-08-28 | 山东普瑞思德石油技术有限公司 | Gas-lift production one plows completion tubular column and technique |
| CN108457601B (en) * | 2018-04-10 | 2023-06-30 | 山东普瑞思德石油技术有限公司 | Gas lift oil extraction one-trip well completion pipe string and process |
| CN112081535A (en) * | 2019-06-14 | 2020-12-15 | 中国石油化工股份有限公司 | Ultra-deep high-sulfur-content gas well completion pipe string and construction method thereof |
| CN112647857A (en) * | 2019-10-12 | 2021-04-13 | 中国石油化工股份有限公司 | Injection-production string and well completion method using same |
| CN112647857B (en) * | 2019-10-12 | 2022-11-25 | 中国石油化工股份有限公司 | Injection-production string and well completion method using same |
| CN110952963A (en) * | 2019-10-30 | 2020-04-03 | 中国石油化工股份有限公司 | Structure and method for producing tubular column with pressing-down gas lift |
| CN112253059A (en) * | 2020-10-19 | 2021-01-22 | 中建四局土木工程有限公司 | Central well completion pipe string for gas lift production and gas lift construction method |
| CN112253059B (en) * | 2020-10-19 | 2024-04-09 | 中建四局土木工程有限公司 | Center well completion pipe column for gas lift production and gas lift construction method |
| CN114562240A (en) * | 2022-03-04 | 2022-05-31 | 中海石油(中国)有限公司 | Bypass gas lift working barrel for oil and gas field |
| CN114562241A (en) * | 2022-03-04 | 2022-05-31 | 中海石油(中国)有限公司 | Bypass continuous pipe gas injection gas lift pipe column system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20211210 |