CN104675344A - Well cementation simulated flushing efficiency evaluation device - Google Patents
Well cementation simulated flushing efficiency evaluation device Download PDFInfo
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- CN104675344A CN104675344A CN201410689322.1A CN201410689322A CN104675344A CN 104675344 A CN104675344 A CN 104675344A CN 201410689322 A CN201410689322 A CN 201410689322A CN 104675344 A CN104675344 A CN 104675344A
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- flushing
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- wellbore hole
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Abstract
The invention relates to the technical field of oil drilling, in particular to a well cementation simulated flushing efficiency evaluation device. The well cementation simulated flushing efficiency evaluation device comprises a sealed filtration system and a flushing replacement circulation system. The sealed filtration system comprises a simulated shaft and a pressure-proof kettle wrapping the simulated shaft. A heating sleeve is arranged at a recession of the outer portion of the pressure-proof kettle. A filtration groove covers a reducing portion of the simulated shaft. A mud cake is arranged between the filtration groove and the simulated shaft. A hydraulic rubber sleeve is embedded between the simulated shaft and the filtration groove. The well cementation simulated flushing efficiency evaluation device has the advantages that forming of mud cakes by permeable stratums under different downhole conditions can be simulated, the downhole flowing state of flushing fluid can be also simulated, and flushing efficiency of the flushing fluid under different working conditions is evaluated; the device convenient to mount and demount can monitor simulated stratum core quality before and after mud cake forming and simulated stratum core quality after flushing in real time to achieve quantitative evaluation of flushing efficiency of the flushing fluid to second interfaces.
Description
Technical field
The present invention relates to oil drilling technology field, be specifically related to a kind of well cementation simulation flush efficiency evaluating apparatus.
Background technology
Improve down-hole annular flush efficiency, good cementing environment can be provided for cement sheath, ensure cementing quality.At present, also do not form unified flush efficiency evaluation method both at home and abroad, and some conventional flush efficiency evaluation methods also also exist very large deficiency, on-the-spot cementing operation can not be entirely rationally effective experimental data is provided.Both at home and abroad once set up large-scale simulation wellbore hole and overall merit carried out to flush efficiency, but due to complicated operation, maintenance difficulty, experimentation cost higher, now seldom use.And much relevant well cementation flush efficiency research is only paid close attention to and is washed away replacement to the drilling fluid that can flow, and but have ignored the flushing to the borehole wall having certain gel strength mud cake, therefore second contact surface is not cleaned up, and have impact on second contact surface bonding quality.
Summary of the invention
The present invention is intended to propose a kind of well cementation simulation flush efficiency evaluating apparatus.
Technical program of the present invention lies in:
A kind of well cementation simulation flush efficiency evaluating apparatus, replaces the circulating system by airtight leak-off system and flushing and forms; Wherein, airtight leak-off system by simulation wellbore hole, and is wrapped in the withstand voltage kettle composition of simulation wellbore hole outer wall, and the outside recess of withstand voltage kettle is provided with heating jacket, and the reducing place of simulation wellbore hole is enclosed with leak-off groove; Mud cake is provided with between leak-off groove and simulation wellbore hole; Hydraulic rubber sleeve is nested with between simulation wellbore hole and leak-off groove.
Preferably, rinsing the replacement circulating system is the pipeline end to end with simulation wellbore hole; Pipeline is in series with the water tank that makes up a prescription, centrifugal pump, flow meter successively; Make up a prescription water tank connecting analog pit shaft top, flow meter is connected to simulation wellbore hole bottom.
More preferably, water tank inside of making up a prescription is provided with heater.
Or preferably, simulation wellbore hole inside is provided with temperature pick up.
Technique effect of the present invention is:
The present invention cements the well and simulates the forming process that flush efficiency evaluating apparatus not only can simulate permeable formation mud cake, flushing liquor flush efficiency to mud cake under different flow regime can also be evaluated, can be cleaning parameter design and foundation is provided, make the working condition can recognizing flusher at work in real time.Permeable formation can be simulated under different conditions down-hole, form mud cake, and the flow regime of flushing liquor in down-hole can be simulated, evaluate the developing result of flushing liquor under different operating mode.This device wants easy accessibility, can carry out Real-Time Monitoring, realize the quantitative assessment of flushing liquor to second contact surface flush efficiency to simulation formation core quality after simulated formation core quality before and after formation mud cake and flushing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, 1-simulation wellbore hole; 2-is withstand voltage kettle; 3-heating jacket; 4-leak-off groove; 5-mud cake; 6-hydraulic rubber sleeve; 7-makes up a prescription water tank; 8-centrifugal pump; 9-flow meter; 10-heater; 11-temperature pick up.
Detailed description of the invention
A kind of well cementation simulation flush efficiency evaluating apparatus, replaces the circulating system by airtight leak-off system and flushing and forms; Wherein, airtight leak-off system is by simulation wellbore hole 1, and the withstand voltage kettle 2 being wrapped in simulation wellbore hole 1 outer wall forms, and the outside recess of withstand voltage kettle 2 is provided with heating jacket 3, and the reducing place of simulation wellbore hole 1 is enclosed with leak-off groove 4; Mud cake 5 is provided with between leak-off groove 4 and simulation wellbore hole 1; Hydraulic rubber sleeve 6 is nested with between simulation wellbore hole 1 and leak-off groove 4.
Wherein, it is the pipeline end to end with simulation wellbore hole 1 that described flushing replaces the circulating system; Pipeline is in series with successively the water tank 7 that makes up a prescription, centrifugal pump 8, flow meter 9; Make up a prescription water tank 7 connecting analog pit shaft 1 top, flow meter 9 is connected to simulation wellbore hole 1 bottom.Water tank 7 inside of making up a prescription is provided with heater 10.Simulation wellbore hole 1 inside is provided with temperature pick up 11.
Simulation wellbore hole 1 is tapered pipeline, plays a transition role, and keeps fluid stable during to guarantee that flushing liquor replaces simulation core.Pressurization mouth is arranged at withstand voltage kettle 2 top, by gas cylinder pressurization, to simulate the leak-off pressure reduction of drilling fluid at rock core place.
During test, simulated formation rock core is placed in the airtight leak-off system of evaluating apparatus, and add drilling fluid, setting downhole temperature, pressurizeed by the pressurization mouth on withstand voltage kettle 2 top, to form leak-off pressure reduction, the leak-off process of simulation drilling fluid in certain permeability rock core also forms certain thickness mud cake 5; The simulated formation rock core with mud cake 5 is taken out from airtight leak-off system, and claim its quality m, then be positioned in flush cycle system, in conjunction with the hydraulic parameters of on-the-spot cementing operation, set centrifugal pump delivery, simulate different annular space upward velocity and rinse the rock core having mud cake 5, after being flushed to certain hour (washing time was determined according to the time of contact of on-the-spot flushing liquor and drilling fluid), from circle irrigation system, taking out simulated formation rock core and claim its quality m; Finally calculate flush efficiency.
Claims (4)
1. a well cementation simulation flush efficiency evaluating apparatus, is characterized in that: replace the circulating system by airtight leak-off system and flushing and form; Wherein, airtight leak-off system by simulation wellbore hole (1), and is wrapped in withstand voltage kettle (2) composition of simulation wellbore hole (1) outer wall, and withstand voltage kettle (2) outside recess is provided with heating jacket (3), and the reducing place of simulation wellbore hole (1) is enclosed with leak-off groove (4); Mud cake (5) is provided with between leak-off groove (4) and simulation wellbore hole (1); Hydraulic rubber sleeve (6) is nested with between simulation wellbore hole (1) and leak-off groove (4).
2., as claim 1 one kind well cementation simulation flush efficiency evaluating apparatus, it is characterized in that: it is the pipeline end to end with simulation wellbore hole (1) that described flushing replaces the circulating system; Pipeline is in series with successively the water tank that makes up a prescription (7), centrifugal pump (8), flow meter (9); Make up a prescription water tank (7) connecting analog pit shaft (1) top, flow meter (9) is connected to simulation wellbore hole (1) bottom.
3., as claim 2 one kind well cementation simulation flush efficiency evaluating apparatus, it is characterized in that: the described water tank that makes up a prescription (7) inside is provided with heater (10).
4., as claim 1 one kind well cementation simulation flush efficiency evaluating apparatus, it is characterized in that: described simulation wellbore hole (1) inside is provided with temperature pick up (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410689322.1A CN104675344A (en) | 2014-11-26 | 2014-11-26 | Well cementation simulated flushing efficiency evaluation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410689322.1A CN104675344A (en) | 2014-11-26 | 2014-11-26 | Well cementation simulated flushing efficiency evaluation device |
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| Publication Number | Publication Date |
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| CN104675344A true CN104675344A (en) | 2015-06-03 |
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| CN201410689322.1A Pending CN104675344A (en) | 2014-11-26 | 2014-11-26 | Well cementation simulated flushing efficiency evaluation device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990776A (en) * | 2015-07-07 | 2015-10-21 | 西南石油大学 | Device for simulating underground drilling fluid cake forming and flushing fluid flushing |
| CN108240185A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Evaluation device and method for well cementation flushing efficiency |
| CN109541175A (en) * | 2018-11-20 | 2019-03-29 | 中国地质大学（北京） | A kind of simulation down-hole drilling fluids recycle the device and method to form mud cake |
| CN110107235A (en) * | 2019-06-14 | 2019-08-09 | 西南石油大学 | A kind of compacting of drilling fluid filter cake and cleaning efficiency integration evaluating apparatus and method |
| CN110617018A (en) * | 2019-09-16 | 2019-12-27 | 西南石油大学 | Device and method for evaluating flushing efficiency of filter cake of well cementation cement injection drilling fluid |
| CN111577172A (en) * | 2020-05-11 | 2020-08-25 | 中国石油天然气股份有限公司 | Well cementation flushing fluid flushing efficiency evaluation device and method |
-
2014
- 2014-11-26 CN CN201410689322.1A patent/CN104675344A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990776A (en) * | 2015-07-07 | 2015-10-21 | 西南石油大学 | Device for simulating underground drilling fluid cake forming and flushing fluid flushing |
| CN108240185A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Evaluation device and method for well cementation flushing efficiency |
| CN109541175A (en) * | 2018-11-20 | 2019-03-29 | 中国地质大学（北京） | A kind of simulation down-hole drilling fluids recycle the device and method to form mud cake |
| CN112903961A (en) * | 2018-11-20 | 2021-06-04 | 中国地质大学（北京） | Using method of device for simulating underground drilling fluid circulation to form mud cakes |
| CN112903961B (en) * | 2018-11-20 | 2022-02-01 | 中国地质大学（北京） | Using method of device for simulating underground drilling fluid circulation to form mud cakes |
| CN110107235A (en) * | 2019-06-14 | 2019-08-09 | 西南石油大学 | A kind of compacting of drilling fluid filter cake and cleaning efficiency integration evaluating apparatus and method |
| CN110107235B (en) * | 2019-06-14 | 2021-03-19 | 西南石油大学 | Drilling fluid filter cake pressing and cleaning efficiency integrated evaluation device and method |
| CN110617018A (en) * | 2019-09-16 | 2019-12-27 | 西南石油大学 | Device and method for evaluating flushing efficiency of filter cake of well cementation cement injection drilling fluid |
| CN110617018B (en) * | 2019-09-16 | 2021-06-11 | 西南石油大学 | Device and method for evaluating flushing efficiency of filter cake of well cementation cement injection drilling fluid |
| CN111577172A (en) * | 2020-05-11 | 2020-08-25 | 中国石油天然气股份有限公司 | Well cementation flushing fluid flushing efficiency evaluation device and method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |
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| WD01 | Invention patent application deemed withdrawn after publication |