CN101122219A - Well-repairing process for casing deformed oil and water well - Google Patents
Well-repairing process for casing deformed oil and water well Download PDFInfo
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- CN101122219A CN101122219A CNA200710012939XA CN200710012939A CN101122219A CN 101122219 A CN101122219 A CN 101122219A CN A200710012939X A CNA200710012939X A CN A200710012939XA CN 200710012939 A CN200710012939 A CN 200710012939A CN 101122219 A CN101122219 A CN 101122219A
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Abstract
The invention relates to a casing deformation oil-water well repair technics. The sand-washing technology and the anti-sand technics with a gravel-filled string are adopted by the invention. Sand is first washed to a preset position with a specially made sand-washing tool, and then the anti-sand string is put into the well. A certain amount of quartz sand is filled outside the string to complete the well. Thus, a well bore hole is reinforced and an oil flow or water injection passage is formed, so as to reach the purpose of production recovery for an oil well and water injection recovery for a water injection well. The casing deformation oil-water well repair technics provided by the invention avoids the overhaul procedure. The sand prevention work can be directly carried out, the well repair cost is reduced, and the construction period is shortened. Moreover, when the sand is effectively prevented, the intention is provided with a certain channelizing effect for an oil layer, which is favorable for increasing the oil well output or the water injection amount of the water injection well.
Description
Technical field:
The present invention relates to a kind of process that casing deformation oil, well well workover reproduce that is used for, belong to oil recovery workover treatment technology class.
Background technology:
Along with the prolongation of oil field development time, many oil fields enter middle and advanced stage, and the oil-water well of casing deformation, fault is more and more.At present, field by using multiple sleeve pipe recovery technique, as casing patching, get and change cover, following small casing well cementation secondary completion etc.Because these technologies are subjected to the restriction of specific well conditions, and the work progress complexity, the duration is longer, does not have reasonability economically, its application is affected, and oil field development and production actual needs are developed the casing deformation well repair process that can overcome above-mentioned deficiency.
Summary of the invention:
The object of the present invention is to provide a kind of operation is simple, easy to implement, construction cost is low, the duration is short casing deformation oil, well workover process method.
Technical scheme of the present invention is as follows.It is to adopt casing deformation well sand washing technology and gravel pack tubing string anti-sand process technology that this kind cover becomes oil-water well workover process method, at first use special sand flushing tool sand washing behind the precalculated position, be lowered to special sand preventing tool tubing string, a certain amount of quartz sand completion of filling outside pipe, realize the reinforcing of casing deformation well well, form oil stream or waterflood path, reach the purpose that oil well reproduces, water injection well is annotated again.
The construction sequence of this kind process is as follows:
1, washes kill-job, trip out tubing string in the well.
2, sand washing: adopt no box cupling or little tail pipe sand washing tubing string to visit the sand face, have sand then sand washing to the precalculated position;
3, drifting: the drifting of following corresponding size drift size gauge tool is to projected depth;
4, pipe cleaning: following pipeline scraper is scraped well, scrapes the back and uses hot water two weeks of anti-flushing well;
5, be lowered to bottom filling or top filling anti-sand tubing string or not filling tubing string, the seat envelope;
6, dress high-pressure well mouth, connecting line, sand control construction;
7, give up, trip out the filling tubing string, form completion tubular column by device for filling and screen casing in the well.
The technical essential of this process is as follows:
1, adopt the no box cupling of series towards sand control pipe or minor diameter tail pipe sand washing tubing string.
Because the special limitation of casing deformation well section, the feasible conventional problem that has the box cupling tubing string in removing, scratching very easily to take place or can not be lowered at all, no box cuplingization towards sand control pipe has solved the problems referred to above effectively, the measure that guaranteed is effectively carried out smoothly, not having the box cupling sand control screen simultaneously makes into well casing post external diameter unified, form the smooth face of cylinder, the friction factor of outer wall is reduced to 0.09 by 0.25 of band box cupling, salvage resistance only for original 1/3rd thereby make, efficiently solve in the past sand control pipe and salvage difficult problem.
No box cupling sand washing tubing string external diameter is φ 73mm, also can make the integral joint tubing that adopts φ 42mm, φ 52mm, φ 60.3mm plurality of specifications.
2, adopt towards sand control pipe direction swivel joint.
Casing deformation well section in many places cover change, the sand washing tubing string is bearing crooked and multiple stress such as is reversing, make tubing string easily thread off or bending, and on the sand washing tubing string, connect the swivel joint of respective numbers, make down-hole string freely crooked rotation when bearing bending and torsional stress, can address the above problem effectively.
3, adopt high strength slit self-cleaning sand-proof screen pipe.
The casing deformation well sand control screen is the most important ring of this technology, and the sand control screen one that this class well requires is to want the intensity height, is unlikely to distortion under the local stress effect of casing deformation position; The 2nd, external diameter can not be too thick, so that go into the well; The 3rd, certain self-cleaning ability is arranged, applicability is strong; The 4th, salvage if desired, salvage easily.The slit self-cleaning sand-proof screen pipe can satisfy above-mentioned requirements fully.
4, adopt the gravel filling sand prevention tubing string.This tubing string is followed successively by plug+tubing nipple+centralizer+high-pressure packing sand-control screen casing+tubing nipple+safety joint+signal pipe nipple+plain end oil well pipe+device for filling+heavy wall tubing from bottom to top.
Casing deformation well workover process method provided by the invention has been saved the overhaul operation, directly carry out sand control and administer, can save workover cost, shorten construction period, and, help improving oil well output or water injection well injection rate effectively in the sand control oil reservoir being had certain effect of dredging.
Description of drawings:
Accompanying drawing is an operating tool string structural representation of the present invention.Among the figure, label " 7 ", " 8 " are respectively oil-gas Layer and shaft bottom.
The specific embodiment:
Be illustrated below in conjunction with accompanying drawing.
As shown in the figure: the gravel filling sand prevention tubing string that the present invention adopts is made up of heavy wall tubing 1, device for filling 2, signal pipe nipple 3, high-pressure packing sand-control screen casing 4, centralizer 5, plug 6 from top to bottom, can be one of following three kinds of package assemblies from bottom to top according to the hole condition tubing string:
Top filling: plug+integral joint tubing pipe nipple+no box cupling sand control screen+integral joint tubing pipe nipple+no box cupling safety joint+tell tale screen+integral joint tubing pipe nipple+top device for filling+oil pipe
Bottom filling: plug+integral joint tubing pipe nipple+bottom filling device+no box cupling sand control screen+integral joint tubing pipe nipple+no box cupling safety joint+tell tale screen+integral joint tubing pipe nipple+packer+oil pipe
Not filling: plug+integral joint tubing pipe nipple+no box cupling sand control screen+integral joint tubing pipe nipple+no box cupling safety joint+integral joint tubing pipe nipple+packer+oil pipe.
Claims (6)
1. well-repairing process for casing deformed oil and water well, it is characterized in that: this process is to adopt casing deformation well sand washing technology and gravel filling sand prevention process technology, at first use special sand flushing tool sand washing behind the precalculated position, be lowered to special sand preventing tool tubing string, at the outer a certain amount of quartz sand of filling of pipe or do not carry out the direct completion of gravel pack, realize that the casing deformation well well reinforces, form liquid and flow or waterflood path, reach oil well and reproduce, the purpose that water injection well is annotated again.
2. well-repairing process for casing deformed oil and water well as claimed in claim 1 is characterized in that: the main construction sequence of this kind process is as follows:
1) washes kill-job, trip out tubing string in the well;
2) sand washing: adopt no box cupling or little tail pipe sand washing tubing string to visit the sand face, have sand then sand washing to the precalculated position;
3) drifting: the drifting of following corresponding size drift size gauge tool is to projected depth;
4) pipe cleaning: following pipeline scraper is scraped well;
5) be lowered to bottom filling or top filling anti-sand tubing string or not filling tubing string, the seat envelope;
6) dress high-pressure well mouth, connecting line, sand control construction;
7) give up, trip out the filling tubing string, form completion tubular column by device for filling and screen casing in the well.
3. well-repairing process for casing deformed oil and water well as claimed in claim 1 is characterized in that: adopt minor diameter tail pipe sand washing tubing string or do not have box cupling sand washing tubing string or coiled tubing sand washing tubing string.
4. well-repairing process for casing deformed oil and water well as claimed in claim 1 is characterized in that: in sleeve pipe many places distortion well, and minor diameter tail pipe sand washing tubing string as claimed in claim 3 or do not have that box cupling sand washing tubing string is optional uses universal swivel joint.
5. well-repairing process for casing deformed oil and water well as claimed in claim 1 is characterized in that: adopt high strength slit self-cleaning sand-proof screen pipe.
6. well-repairing process for casing deformed oil and water well as claimed in claim 1, it is characterized in that: adopt top gravel pack technology or bottom gravel pack technology or according to not filling of hole condition completion, the no box cupling sand control pipe that adopts is followed successively by following three kinds of package assemblies from bottom to top:
Top filling: plug+integral joint tubing pipe nipple+no box cupling sand control screen+integral joint tubing pipe nipple+no box cupling safety joint+tell tale screen+integral joint tubing pipe nipple+top device for filling+oil pipe
Bottom filling: plug+integral joint tubing pipe nipple+bottom filling device+no box cupling sand control screen+integral joint tubing pipe nipple+no box cupling safety joint+tell tale screen+integral joint tubing pipe nipple+packer+oil pipe
Not filling: plug+integral joint tubing pipe nipple+no box cupling sand control screen+integral joint tubing pipe nipple+no box cupling safety joint+integral joint tubing pipe nipple+packer+oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710012939XA CN101122219A (en) | 2007-09-24 | 2007-09-24 | Well-repairing process for casing deformed oil and water well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710012939XA CN101122219A (en) | 2007-09-24 | 2007-09-24 | Well-repairing process for casing deformed oil and water well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101122219A true CN101122219A (en) | 2008-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710012939XA Pending CN101122219A (en) | 2007-09-24 | 2007-09-24 | Well-repairing process for casing deformed oil and water well |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330545A (en) * | 2011-10-17 | 2012-01-25 | 中国石油天然气股份有限公司 | Oil well sand prevention method for heavy oil reservoir |
| CN103967459A (en) * | 2014-05-05 | 2014-08-06 | 中国石油集团渤海钻探工程有限公司 | Sewage reinjection well and water injection method of sewage reinjection well |
| CN104632130A (en) * | 2014-12-03 | 2015-05-20 | 中国庆华能源集团有限公司 | Workover well completion process |
| CN106761590A (en) * | 2015-11-24 | 2017-05-31 | 中国石油化工股份有限公司 | Many slug high compact filling anti-sand processes |
| CN109854213A (en) * | 2019-03-18 | 2019-06-07 | 中国石油化工股份有限公司 | Set damage repairs the sand control pipe of well |
| CN110195578A (en) * | 2019-03-18 | 2019-09-03 | 中国石油化工股份有限公司 | The seperated layer water injection system of small casing pipe well |
| CN114135250A (en) * | 2020-09-04 | 2022-03-04 | 中国石油天然气股份有限公司 | Casing deformation well sand prevention method and device |
-
2007
- 2007-09-24 CN CNA200710012939XA patent/CN101122219A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330545A (en) * | 2011-10-17 | 2012-01-25 | 中国石油天然气股份有限公司 | Oil well sand prevention method for heavy oil reservoir |
| CN102330545B (en) * | 2011-10-17 | 2014-02-05 | 中国石油天然气股份有限公司 | Oil well sand prevention method for heavy oil reservoir |
| CN103967459A (en) * | 2014-05-05 | 2014-08-06 | 中国石油集团渤海钻探工程有限公司 | Sewage reinjection well and water injection method of sewage reinjection well |
| CN104632130A (en) * | 2014-12-03 | 2015-05-20 | 中国庆华能源集团有限公司 | Workover well completion process |
| CN106761590A (en) * | 2015-11-24 | 2017-05-31 | 中国石油化工股份有限公司 | Many slug high compact filling anti-sand processes |
| CN109854213A (en) * | 2019-03-18 | 2019-06-07 | 中国石油化工股份有限公司 | Set damage repairs the sand control pipe of well |
| CN110195578A (en) * | 2019-03-18 | 2019-09-03 | 中国石油化工股份有限公司 | The seperated layer water injection system of small casing pipe well |
| CN110195578B (en) * | 2019-03-18 | 2023-05-12 | 中国石油化工股份有限公司 | Separate layer water injection system of small cased well |
| CN114135250A (en) * | 2020-09-04 | 2022-03-04 | 中国石油天然气股份有限公司 | Casing deformation well sand prevention method and device |
| CN114135250B (en) * | 2020-09-04 | 2023-08-22 | 中国石油天然气股份有限公司 | Sand control method and device for casing change well |
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Open date: 20080213 |