CN103967447B - The sweep-out method of oil pipe paraffin blockage - Google Patents
The sweep-out method of oil pipe paraffin blockage Download PDFInfo
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- CN103967447B CN103967447B CN201410227249.6A CN201410227249A CN103967447B CN 103967447 B CN103967447 B CN 103967447B CN 201410227249 A CN201410227249 A CN 201410227249A CN 103967447 B CN103967447 B CN 103967447B
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Abstract
The invention discloses the sweep-out method of a kind of oil pipe paraffin blockage, comprise the following steps: install on wellhead tree tree and rise senior executive, seal and lower seal in connection, it is lowered in liter senior executive after well-flushing pipe is connected syringe pipe, when well-flushing pipe upper end is away from liter senior executive top 1m～2m distance, fix well-flushing pipe with tubing slip；Connect adaptive switched threeway and next stage well-flushing pipe step by step and transfer；When well-flushing pipe is transferred to production tube, the annular space between well-flushing Guan Yusheng senior executive is sealed；While the wax on one section of tube wall to production tube is purged well-flushing fluid in the way of circulating, transfer well-flushing pipe continuously；Until by fully erased for the paraffin blockage in production tube.The present invention is easy to offshore oilfield and is removed paraffin blockage operation, solves current coiled tubing and removes that paraffin blockage cost is high, lifts paraffin cutting difficult, mechanical thoroughly and the defect of easy damaged tube wall, thus be effectively saved operating cost, adds oil well productivity.
Description
Technical field
The present invention relates to offshore oilfield field of engineering technology, the sweep-out method of a kind of oil pipe paraffin blockage.
Background technology
During oil exploitation, oil well paraffinication can make oil pipe necking down, affects the normal production of oil well, even make production tube block, cause oil well to stop production, for marine hypercoagulation oilfield, once oil well is lain well or keep away platform and close down, and crude oil also easily solidifies in tubing string and production tube blocked.Once production tube blocks completely, will be unable to use conventional means to be purged paraffin blockage operation.Using coiled tubing to be circulated flushing in production tube, can remove paraffin blockage, but continuous oil pipe operation cost is high, part producing platform Lifting Capacity is limited, it is impossible to platform, coiled tubing lifting is carried out wax removal operation；Use paraffin bit can strike off oil wax in pipe, but the method wax removal is not thorough, the easiest scratch tube wall；And using the mode that high temperature fluid annular space soaks, the efficiency releasing paraffin blockage is low, and fluid can invade reservoir and cause reservoir damage.
State Intellectual Property Office discloses Publication No. CN101748992A on June 23rd, 2010, patent name is the application for a patent for invention document of paraffin removal unit for oil well in oil field, the technical scheme of this patent documentation is as follows: be provided with ring-shaped transformer between the sleeve pipe and oil pick-up tube of producing well, has a conductor to connect sleeve pipe and oil pick-up tube bottom producing well.When ring-shaped transformer primary has electric current to pass through, the secondary loop being made up of oil pick-up tube, oil recovery number, sleeve pipe and producing well bottom conductor can produce electric current, makes oil pick-up tube generate heat, and dissolves the paraffin being attached on oil pick-up tube inner tubal wall, reaches the purpose removed.
State Intellectual Property Office discloses Publication No. CN101699024A on April 28th, 2010, patent name is the application for a patent for invention document of the paraffin removal technological method of washing oil wells with hot steam, it is mainly characterized by utilizing heat-pipe furnace that softening water is heated into steam, vapor (steam) temperature is made to be maintained at 120 DEG C-160 DEG C, steam pressure is more than oil well casing pressure, is input in oil well from oil well casing by steam, from oil pipe out, through 8-12 hour, oil pipe paraffin removal can be completed.The method provides the benefit that, solve a wax removal difficult problem for the oil well yielded poorly or heavy crude well, wax deposition capable of washing is very serious, oil-line plugging reach more than 60% oil well, do not affect the crude oil production of oil well, will not polluted reservoir, safety in production can be accomplished, the thermal efficiency is high, save fuel oil, reduce and pollute.The method is applicable to the daily output and is higher than the oil well of 10000 centipoises less than 8 sides or viscosity of crude.
Technique scheme, owing to using electric current to make oil pick-up tube generate heat, dissolves the paraffin being attached on oil pick-up tube inner tubal wall, and actual application is the most undesirable, not only need bigger electric energy is lost, and also dangerous, molten wax effect extreme difference, this patent is entirely different with technique scheme.The paraffin removal technological method of washing oil wells with hot steam is clearly the most entirely different with the sweep-out method of the oil pipe paraffin blockage of the present invention.
Summary of the invention
It is an object of the invention to overcome deficiency of the prior art, it is provided that a kind of easy to operation, sweep-out method of oil pipe paraffin blockage that low cost, efficiency are high.
For achieving the above object, the technical solution adopted in the present invention is:
The sweep-out method of oil pipe paraffin blockage, comprises the following steps:
A, on wellhead tree tree install rise a senior executive, rise the upper connection of senior executive and have upper sealing and lower seal, and make the inlet on the tube wall of liter senior executive be positioned at the top of lower seal, rise the leakage fluid dram on the tube wall of senior executive and be positioned at the lower section of lower seal, pump and heater are serially connected in cleanout fluid pipeline, again the drain side of cleanout fluid pipeline is connected with the inlet on the tube wall rising senior executive, the backflow end of cleanout fluid pipeline is connected with the leakage fluid dram on the tube wall rising senior executive；It is lowered in liter senior executive after first well-flushing pipe is connected syringe pipe, and opens the valve on wellhead tree tree；
B, when the well-flushing pipe upper end transferred is away from liter senior executive top 0.5m～2m distance, fix well-flushing pipe with tubing slip；
C, the lower port of adaptive switched threeway is connected in the upper port of well-flushing pipe, then the lower end of next root well-flushing pipe is connected in the upper port of adaptive switched threeway, and transfer well-flushing pipe；
D, repetition step B and C, when in the production tube that the well-flushing pipe of bottom is transferred to wellhead tree tree, upper sealing and lower seal are closed, makes sealing and lower seal embrace well-flushing pipe, annular space between well-flushing Guan Yusheng senior executive is sealed, constitutes closed loop dead band；
E, start pump and heater, pump by the well-flushing fluid in heater by cleanout fluid pipeline closed loop dead band in inlet is injected into liter senior executive, under the hydraulic action of well-flushing fluid, well-flushing fluid is after the sidewall inlet of the adaptive switched threeway on top flows in circular tube shaped valve body, ball sealer moves up along alley, upper end inlet is closed, flow into the liquid in circular tube shaped valve body all to discharge from lower end leakage fluid dram, each adaptive switched threeway of bottom is automatically switched off sidewall inlet, upper end inlet communicates with lower end leakage fluid dram, well-flushing fluid flows in production tube, flowed up by the annular space between well-flushing pipe and production tube again, the annular space risen between senior executive and well-flushing pipe is entered through wellhead tree tree, in leakage fluid dram is back to cleanout fluid pipeline, wax on the tube wall of production tube is purged in the way of circulating by well-flushing fluid；
During F, the well-flushing fluid circulated wax on the tube wall to production tube are purged, repeat step B and C, realize while the wax on the tube wall of production tube is purged, the well-flushing pipe transferred, until the wax on the tube wall of production tube is fully erased totally；
After G, removing, close pump and heater, upper sealing and lower seal are opened, after taking out well-flushing pipe, close the valve on well head production tree.
Further, in described step B, when well-flushing pipe upper end is away from liter senior executive top 1m～1.5m distance, fix well-flushing pipe with tubing slip.
Further, described well-flushing Guan Weiwu box cupling well-flushing pipe.
Further, in described step C, the upper port of adaptive switched threeway and lower port are threadeded with well-flushing pipe respectively.
Beneficial effects of the present invention: owing to using the sweep-out method of above-mentioned oil pipe paraffin blockage, the present invention is easy to offshore oilfield and is removed paraffin blockage operation, there is feature easy to operation, that low cost, efficiency are high, solve current coiled tubing to remove that paraffin blockage cost is high, lift paraffin cutting difficult, mechanical thoroughly and the defect of easy damaged tube wall, thus it is effectively saved operating cost, add oil well productivity.
Accompanying drawing explanation
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is the construction schematic diagram of the present invention；
Fig. 2 is the structural representation of adaptive switched threeway shown in Fig. 1.
In figure: 1, rise senior executive；2, well-flushing pipe；3, upper sealing；4, lower seal；5, adaptive switched threeway；6, pump；7, cleanout fluid pipeline；8, heater；9, wellhead tree tree；10, production tube；11, annular space；12, closed loop dead band；13, inlet；14, leakage fluid dram；15, tubing slip；16, circular tube shaped valve body；17, ball sealer；18, sidewall inlet；19, upper end inlet；20, lower end leakage fluid dram；21, alley.
Detailed description of the invention
As shown in Figure 1, 2, the sweep-out method of oil pipe paraffin blockage, comprise the following steps:
The sweep-out method of oil pipe paraffin blockage, comprises the following steps:
A, on wellhead tree tree 9 install rise a senior executive 1, rise to connect on senior executive 1 and have upper sealing 3 and lower seal 4, and make the inlet 13 on the tube wall of liter senior executive 1 be positioned at the top of lower seal 4, rise the leakage fluid dram 14 on the tube wall of senior executive 1 and be positioned at the lower section of lower seal 4, pump 6 and heater 8 are serially connected in cleanout fluid pipeline 7, again the drain side of cleanout fluid pipeline 7 is connected with the inlet 13 on the tube wall rising senior executive 1, the backflow end of cleanout fluid pipeline 7 is connected with the leakage fluid dram 14 on the tube wall rising senior executive；It is lowered in liter senior executive 1 after first well-flushing pipe is connected syringe pipe, and opens the valve on wellhead tree tree 9；Described well-flushing Guan Weiwu box cupling well-flushing pipe.
B, when well-flushing pipe 2 upper end transferred is away from liter senior executive top 0.5m～2m distance, fix well-flushing pipe with tubing slip 15；
C, the lower port of adaptive switched threeway 5 is connected in the upper port of well-flushing pipe 2, again the lower end of next root well-flushing pipe is connected in the upper port of adaptive switched threeway, and transfer well-flushing pipe, concrete connected mode is: the upper port of adaptive switched threeway and lower port are threadeded with well-flushing pipe respectively；
D, repetition step B and C, when in the production tube 10 that the well-flushing pipe of bottom is transferred to wellhead tree tree 9, upper sealing 3 and lower seal 4 are closed, make sealing 3 and lower seal 4 embrace well-flushing pipe 2, annular space between well-flushing Guan Yusheng senior executive is sealed, constitutes closed loop dead band 12；
nullE、Start pump 6 and heater 8，Pump 6 by the well-flushing fluid in heater 8 by cleanout fluid pipeline closed loop dead band 12 in inlet is injected into liter senior executive 1，Under the hydraulic action of well-flushing fluid，Well-flushing fluid is after the sidewall inlet 18 of the adaptive switched threeway 5 on top flows in circular tube shaped valve body 16，Ball sealer 17 moves up along alley 21，Upper end inlet 19 is closed，The liquid flowed in circular tube shaped valve body 16 is all discharged from lower end leakage fluid dram 20，Each adaptive switched threeway of bottom is automatically switched off sidewall inlet，Upper end inlet communicates with lower end leakage fluid dram，Well-flushing fluid flows in production tube 10，Flowed up by the annular space between well-flushing pipe and production tube again，The annular space 11 risen between senior executive and well-flushing pipe is entered through wellhead tree tree，In leakage fluid dram 14 is back to cleanout fluid pipeline 7，Wax on the tube wall of production tube is purged in the way of circulating by well-flushing fluid；
During F, the well-flushing fluid circulated wax on the tube wall to production tube are purged, repeat step B and C, realize while the wax on the tube wall of production tube is purged, the well-flushing pipe transferred, until the wax on the tube wall of production tube 10 is fully erased totally；
After G, removing, close pump 6 and heater 8, upper sealing 3 and lower seal 4 are opened, after taking out well-flushing pipe 2, close the valve on well head production tree 9.
The above is the preferred embodiment of the present invention; certainly the interest field of the present invention can not be limited with this; should be understood that; for those skilled in the art; technical scheme is modified or equivalent, without departure from the protection domain of technical solution of the present invention.
Claims (4)
1. the sweep-out method of an oil pipe paraffin blockage, it is characterised in that: comprise the following steps:
A, on wellhead tree tree install rise a senior executive, rise the upper connection of senior executive and have upper sealing and lower seal, and make the inlet on the tube wall of liter senior executive be positioned at the top of lower seal, rise the leakage fluid dram on the tube wall of senior executive and be positioned at the lower section of lower seal, pump and heater are serially connected in cleanout fluid pipeline, again the drain side of cleanout fluid pipeline is connected with the inlet on the tube wall rising senior executive, the backflow end of cleanout fluid pipeline is connected with the leakage fluid dram on the tube wall rising senior executive；It is lowered in liter senior executive after first well-flushing pipe is connected syringe pipe, and opens the valve on wellhead tree tree；
B, when the well-flushing pipe upper end transferred is away from liter senior executive top 0.5m～2m distance, fix well-flushing pipe with tubing slip；
C, the lower port of adaptive switched threeway is connected in the upper port of well-flushing pipe, then the lower end of next root well-flushing pipe is connected in the upper port of adaptive switched threeway, and transfer well-flushing pipe；
D, repetition step B and C, when in the production tube that the well-flushing pipe of bottom is transferred to wellhead tree tree, upper sealing and lower seal are closed, makes sealing and lower seal embrace well-flushing pipe, annular space between well-flushing Guan Yusheng senior executive is sealed, constitutes closed loop dead band；
nullE、Start pump and heater，Pump by the well-flushing fluid in heater by cleanout fluid pipeline closed loop dead band in inlet is injected into liter senior executive，Under the hydraulic action of well-flushing fluid，Well-flushing fluid is after the sidewall inlet of the adaptive switched threeway on top flows in circular tube shaped valve body，Ball sealer in adaptive switched threeway moves up along alley，Upper end inlet is closed，Flow into the liquid in circular tube shaped valve body all to discharge from lower end leakage fluid dram，Each adaptive switched threeway of bottom is automatically switched off sidewall inlet，Upper end inlet communicates with lower end leakage fluid dram，Well-flushing fluid flows in production tube，Flowed up by the annular space between well-flushing pipe and production tube again，The annular space risen between senior executive and well-flushing pipe is entered through wellhead tree tree，In leakage fluid dram is back to cleanout fluid pipeline，Wax on the tube wall of production tube is purged in the way of circulating by well-flushing fluid；
During F, the well-flushing fluid circulated wax on the tube wall to production tube are purged, repeat step B and C, realize while the wax on the tube wall of production tube is purged, the well-flushing pipe transferred, until the wax on the tube wall of production tube is fully erased totally；
After G, removing, close pump and heater, upper sealing and lower seal are opened, after taking out well-flushing pipe, close the valve on well head production tree.
The sweep-out method of oil pipe paraffin blockage the most according to claim 1, it is characterised in that: in described step B, when well-flushing pipe upper end is away from liter senior executive top 1m～1.5m distance, fix well-flushing pipe with tubing slip.
The sweep-out method of oil pipe paraffin blockage the most according to claim 1, it is characterised in that: described well-flushing Guan Weiwu box cupling well-flushing pipe.
The sweep-out method of oil pipe paraffin blockage the most according to claim 1, it is characterised in that: in described step C, the upper port of adaptive switched threeway and lower port are threadeded with well-flushing pipe respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410227249.6A CN103967447B (en) | 2014-05-27 | 2014-05-27 | The sweep-out method of oil pipe paraffin blockage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410227249.6A CN103967447B (en) | 2014-05-27 | 2014-05-27 | The sweep-out method of oil pipe paraffin blockage |
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| Publication Number | Publication Date |
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| CN103967447A CN103967447A (en) | 2014-08-06 |
| CN103967447B true CN103967447B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410227249.6A Expired - Fee Related CN103967447B (en) | 2014-05-27 | 2014-05-27 | The sweep-out method of oil pipe paraffin blockage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107420068A (en) * | 2016-05-24 | 2017-12-01 | 克拉玛依市鑫众石油工程技术服务有限公司 | A kind of high temperature nitrogen paraffin removal unit and wax removal technique |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2052202A1 (en) * | 1990-10-01 | 1992-04-02 | John Nenniger | Method and apparatus for oil well stimulation |
| CN1702292A (en) * | 2005-05-27 | 2005-11-30 | 黄灏 | Method for hot cleanout and paraffin removal of oil well |
| CN102352744A (en) * | 2011-10-31 | 2012-02-15 | 徐龙欣 | Circulating hot water heavy oil thermal recovery system for ultra-deep well and process thereof |
| RU2462586C2 (en) * | 2010-11-26 | 2012-09-27 | Закрытое акционерное общество "РЕНФОРС" | Method of synergetic reactant-impulse-wave treatment of bottom-hole formation zone and plant for its implementation |
| CN202832390U (en) * | 2012-08-24 | 2013-03-27 | 董宝玉 | Hot washing wax melting device |
| CN103362476A (en) * | 2013-07-02 | 2013-10-23 | 天津大学 | Casing type downhole heat exchanger heating system capable of preventing wall of producing well from paraffin precipitation |
-
2014
- 2014-05-27 CN CN201410227249.6A patent/CN103967447B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2052202A1 (en) * | 1990-10-01 | 1992-04-02 | John Nenniger | Method and apparatus for oil well stimulation |
| CN1702292A (en) * | 2005-05-27 | 2005-11-30 | 黄灏 | Method for hot cleanout and paraffin removal of oil well |
| RU2462586C2 (en) * | 2010-11-26 | 2012-09-27 | Закрытое акционерное общество "РЕНФОРС" | Method of synergetic reactant-impulse-wave treatment of bottom-hole formation zone and plant for its implementation |
| CN102352744A (en) * | 2011-10-31 | 2012-02-15 | 徐龙欣 | Circulating hot water heavy oil thermal recovery system for ultra-deep well and process thereof |
| CN202832390U (en) * | 2012-08-24 | 2013-03-27 | 董宝玉 | Hot washing wax melting device |
| CN103362476A (en) * | 2013-07-02 | 2013-10-23 | 天津大学 | Casing type downhole heat exchanger heating system capable of preventing wall of producing well from paraffin precipitation |
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| CN103967447A (en) | 2014-08-06 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC (China) Limited Zhanjiang Branch Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 China oil tower, 25 Chaoyangmen North Street, Dongcheng District, Beijing Co-patentee before: CNOOC (China) Limited Zhanjiang Branch Patentee before: China National Offshore Oil Corporation |
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| 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: 20160824 Termination date: 20210527 |