CN109386277A - Tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus and method - Google Patents
Tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus and method Download PDFInfo
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- CN109386277A CN109386277A CN201811553824.6A CN201811553824A CN109386277A CN 109386277 A CN109386277 A CN 109386277A CN 201811553824 A CN201811553824 A CN 201811553824A CN 109386277 A CN109386277 A CN 109386277A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 56
- 230000005465 channeling Effects 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 108
- 238000005553 drilling Methods 0.000 claims description 75
- 239000007788 liquid Substances 0.000 claims description 57
- 239000004568 cement Substances 0.000 claims description 42
- 238000011010 flushing procedure Methods 0.000 claims description 41
- 238000002347 injection Methods 0.000 claims description 39
- 239000007924 injection Substances 0.000 claims description 39
- 238000012423 maintenance Methods 0.000 claims description 25
- 238000013519 translation Methods 0.000 claims description 18
- 238000002474 experimental method Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 238000002386 leaching Methods 0.000 claims description 11
- 238000004088 simulation Methods 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 10
- 239000000706 filtrate Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 238000013441 quality evaluation Methods 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims description 5
- 230000004520 agglutination Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 239000006210 lotion Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 89
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003196 chaotropic effect Effects 0.000 description 2
- 235000013351 cheese Nutrition 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/005—Monitoring or checking of cementation quality or level
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Quality & Reliability (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Examining Or Testing Airtightness (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of tiltable and eccentric well cementation second contact surface bonding quality waterpower test devices and method, autoclave body is followed successively by natural core, false rock core, heating and thermal insulation set, support frame from inside to outside, and autoclave body upper and lower part is respectively arranged with rotary table and lower rotary table on ellipse；Natural core and false rock core are connected with lower kettle cover, ensure to seal by seal groove between natural core and false rock core and lower kettle cover；Heating and thermal insulation set can be with heating kettle body inside, simulated formation temperature inside has thermocouple and temperature sensor, and computer is electrically connected with temperature sensor, pressure gauge and flowmeter, its temperature, pressure and flow are recorded and monitored.The present invention is applied widely, not only the cementing situation of second contact surface of analog difference casing eccentricity degree, but also can simulate different hole angles to the influence of second contact surface bonding quality；Its accuracy tested is high, can be applied to that live has channeling is instructed to predict.
Description
Technical field
The present invention relates to oil drilling technology fields, specifically, being related to a kind of tiltable and eccentric well cementation second
Interface agglutination quality evaluation device and method.This patent is related to commenting for oil gas well cementing operation second contact surface i.e. rock core and cement sheath interface
Valence, analog goes out the complete process cemented the well under high temperature and pressure, and analog goes out casing random eccentric degree and hole angle operating condition,
And the cementing situation of rock core Yu cement sheath interface is evaluated using has channeling mode.
Background technique
Cement sheath interlayer bonding quality affects the service life of oil/gas well and effective implementation of various well stimulations.Wherein, water
Cement plane between mud ring and stratum is referred to as second contact surface of cementing the well, and second contact surface bonding quality is easily affected by other factors, and wraps
Include formation condition, wellbore shape, drilling fluid mud cake formational situation, insulating liquid, cement slurry property etc..Therefore, second contact surface is improved
Bonding quality is the key that improve entire cementing quality.
At present about well cementation second contact surface bonding quality evaluation apparatus and method there are still many problems have it is to be solved.Mesh
There are two main classes in preceding laboratory to determine second contact surface cementing strength, first is that using shearing cementing strength, second is that waterpower is cementing strong
Degree.The former has more research at present, as (Yang Zhejie, Liang Hongjun, Li Feng wait well cementation interface cementing strength test to Yang Zhejie
Instrument: CN202381076U [P] .2012.), Cheng Rongchao (Cheng Rongchao, walk Yuhuan, Wang Rui and blast-furnace cinder improve cementing concrete circle
Face bonding capacity research [J] gas industry, 2007,27 (2): 63-66.), Xu Bihua (Xu Bihua, Lu Xiang, Xie Yingquan high
Oil-well cement ring cementing strength test new method [J] drilling engineering under warm high pressure, 2016,36(11): 65-69.) etc., but survey and cut
The stratum channelling pressure that cement plane can be born cannot be represented by cutting the result that cementing strength method obtains, the size of cementing strength with
Anti-channeling ability does not have significant concern, and if cement plane is there are crack, actual formation has occurred and that channelling, but tests cutting for display
Cutting cementing strength still may be very big.As it can be seen that this kind of method is unable to accurate evaluation second contact surface anti-channeling ability.Waterpower cementing strength is commented
The essence of valence method is to evaluate the anti-ability of altering at interface, using channelling pressure as evaluating cementing second interface anti-channeling capacity index, symbol
Close underground situation.(Gu Jun, Yang Weihua, Qin Wenzheng wait well cementation second interface packing merit rating technique study [J] petroleum to Gu Jun
Journal, 2008,29 (3): 451-454.), (step Yuhuan, Liang Yan, Du Jiapei wait the lower second interface of cementing the well of water flooding disturbance to step Yuhuan
Maintenance and bonding quality evaluating apparatus and method: CN107725030A [P] .2017) utilize waterpower cementing strength method test the
The cementing strength of second interface, but the two is all without using natural core simulated formation, cementing situation and underground second contact surface
There are larger differences for truth, therefore experimental result can not really reflect second contact surface bonding quality.Guo little Yang (Guo little Yang,
Zhang Kai, the early member of Lee wait high temperature and pressure well cementation one, the Sichuan second interface sealing aptitude tests device and method [P]:
CN104406910A, 2015-03-11.) it is improved on the basis of waterpower test method, test fluid is changed to gas, phase
For liquid, gas compressibility factor is big, it is easier to above alter, monitoring channelling situation, more accurate evaluation are easier after expansion
Second contact surface bonding quality more accurately tests the breakthrough pressure of second contact surface bonding quality, but device does not simulate flushing liquor
Influence with insulating liquid to mud cake, therefore the second contact surface bonding quality of experimental evaluation and physical presence different.
In addition to above-mentioned analyzed defect, second contact surface bonding quality evaluation of cementing the well at present does not consider casing eccentricity and hole deviation
Influence of the angle to second contact surface cementing strength, cannot abundant simulating down-hole actual behavior.Meanwhile outlet end channelling fluid is not monitored
Flow changes over time relationship, is not previously predicted channelling rule, is not easy to that live channelling is instructed to predict.
Summary of the invention
The present invention is precisely in order to solve above-mentioned technical problem and a kind of tiltable designed and eccentric the second boundary of well cementation
Face bonding quality evaluating apparatus and method.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, including autoclave body, control valve, slush pump,
Pressure gauge, flowmeter, gas bottle, intermediate receptacle, hydraulic pump, computer, deflecting fixed frame, support frame, cursor and dial；
Autoclave body is followed successively by natural core, false rock core, heating and thermal insulation set, support frame from inside to outside, and autoclave body upper and lower part is respectively arranged with
Rotary table and lower rotary table on ellipse；The natural core and false rock core are connected with lower kettle cover, natural core and vacation rock core and lower kettle
Ensure to seal by seal groove between lid；Heating and thermal insulation set can be with heating kettle body inside, simulated formation temperature inside has thermocouple
And temperature sensor, it is electrically connected computer, temperature is recorded and is monitored, meanwhile, computer and pressure gauge and flowmeter are right
Its pressure and flow are recorded and are monitored；
Autoclave body upper and lower part is respectively arranged with rotary table and lower rotary table, upper rotary table side on ellipse and is provided with adjusting screw, separately
Side is provided with fixing screws, and lower rotary table side is provided with adjusting screw, and the other side is provided with fixing screws, and upper rotary table adjusts spiral shell
Nail and lower rotary table adjust screw and are all provided with offset distance graduated scale, turn and adjust screw or the extrudable upper kettle of lower adjusting screw
Lid or the translation of lower kettle cover；
Support frame is fixed on deflecting fixed frame, and support frame is connected by fixing bolt, rotates cursor, keeps tuning drive gear corner full
Hole angle needed for foot, angle on dial, fixed by cursor fixing bolt by cursor；
Upper rotary table is connect by bolt with upper kettle cover, and the two ensures to seal there are sealing ring, and the ring type seal is embedded in upper kettle
In lid, and width is greater than the maximal translation distance i.e. width of annular space of natural core；There are a channels to survey on upper kettle cover
Gas blowby outlet, is connected with the gap of natural core and upper kettle cover；
Lower rotary table is connect by bolt with lower kettle cover, and the two ensures to seal there are ring type seal, and ring type seal is embedded in lower kettle
In lid, and width is greater than the maximal translation distance i.e. width of autoclave body annular space of natural core；There are three channels on lower kettle cover:
First is that ring drainage mouth, is connected with autoclave body annular space, second is that surveying blowby gas inlet, it is connected with false rock core intermediate channel, third is that confining pressure enters
Mouthful, it is connected with confining pressure annular space；Lower kettle cover top can squeeze into a gasket in the annular space between natural core and autoclave body, can be every
From the channel for flowing into ring drainage mouth in lower part with blocking cement；
All symmetrically there is bolt translation slot on upper rotary table and lower rotary table, it is bolt in slot that bolt, which translates, and the translation slot length is big
In the translatable maximum distance of natural core, the i.e. width of autoclave body annular space, to guarantee to obtain the degree of eccentricity large-scale as far as possible, and day
When so rock core is placed in the middle, bolt is located at the starting point of translation slot；
Second contact surface refers to the cement plane that cement sheath and natural core are formed；The survey blowby gas inlet can inject high pressure gas, right
Second contact surface survey is altered；The survey gas blowby outlet is connected with the gap of upper kettle cover and natural core, collects and second contact surface gas is discharged
The gas altered；
Survey gas blowby outlet can connect three pipelines: first is that drilling fluid inject pipeline, may be implemented drilling fluid injection, flushing liquor, every
Chaotropic circulation, second is that maintenance pressure pipeline, may be implemented seal groove Leakage Test, cement sheath maintenance, mud cake formation when
Pressure, third is that has channeling gas detection pipeline, may be implemented the detection and collection of surveying gas blowby body；
Ring drainage mouth can connected drainage pipeline, realization drilling fluid discharge and flushing liquor, insulating liquid circulation；
Two pipelines can be connected by surveying blowby gas inlet: first is that has channeling gas pressurized pipeline, realizes that has channeling gas is inputted to second contact surface
And pressurization；Second is that wellbore liquid leaching loss pipeline, realizes the discharge of seal groove Leakage Test and drilling fluid filtrate；
Confining pressure entrance is connected with confining pressure pipeline, it is ensured that the leakproofness between seal groove and natural core and false rock core.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, the drilling fluid inject pipeline,
After examining the leakproofness between seal groove and natural core and false rock core, control valve is only opened, other control valves are closed
It closes, under the action of slush pump, drilling fluid flows through control valve, is exported by survey gas blowby and flows into autoclave body annular space；After mud cake is formed, beat
Control valve is opened, drilling fluid is discharged from ring drainage mouth, the drilling fluid in slush pump is substituted for flushing liquor, opens control valve
Door, other control valves are turned off, and under the action of slush pump, flushing liquor flows through control valve, are exported by survey gas blowby and are flowed into kettle
Body annular space flows out autoclave body annular space through control valve by ring drainage mouth；After flushing liquor completes circulation, by the flushing in slush pump
Liquid is substituted for insulating liquid, opens control valve, other control valves are turned off, and under the action of slush pump, insulating liquid flows through control
Valve processed is exported by survey gas blowby and flows into autoclave body annular space, by ring drainage mouth, flows out autoclave body annular space through control valve.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, the maintenance pressure pipeline,
Before examining seal groove leakproofness, control valve is opened, other control valves are turned off, and using hydraulic pump, pressure fluid is by centre
Container is exported inside injection autoclave body through control valve and pressure gauge by survey gas blowby；After completing drilling fluid injection, control is opened
Valve, using hydraulic pump, pressure fluid is by intermediate receptacle, through control valve and pressure gauge, exports injection pressure stream by survey gas blowby
Body, reaches pressure condition suffered by simulation down-hole drilling fluids, and simulation mud cake is formed；Cement slurry injects after autoclave body, only opens
Control valve, other control valves are turned off, and at this time under the action of hydraulic pump, open control valve, other control valves are equal
It closes, using hydraulic pump, pressure fluid is exported in injection autoclave body through control valve and pressure gauge by survey gas blowby by intermediate receptacle
Portion reaches simulation underground cement pressure condition.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, the has channeling gas pressurized pipe
Line opens control valve, other control valves are turned off, and using hydraulic pump, alters through intermediate receptacle to blowby gas inlet injection survey is surveyed
Gas, gas enter in seal groove through control valve, detect to second contact surface bonding quality.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, the has channeling gas detecting tube
Line opens control valve, other control valves are turned off, and gas is exported by survey gas blowby and is discharged, through control valve and flowmeter, by
The gas bottle for filling liquid is collected.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, the ring drainage pipeline, mud
Cheese opens control valve at rear, other control valves are turned off, and drilling fluid is discharged from ring drainage pipeline；Drilling fluid discharge
Afterwards, the drilling fluid in slush pump is substituted for flushing liquor, under the action of slush pump, flushing liquor is through control valve, by survey gas blowby
Outlet flows into inside autoclave body, flows out autoclave body annular space by ring drainage mouth, flows out ring drainage pipeline through control valve；It completes to rinse
After liquid circulation, the flushing liquor in slush pump is substituted for insulating liquid, insulating liquid is exported by survey gas blowby through control valve and flows into autoclave body
Inside, flows out body by ring drainage mouth, flows out ring drainage pipeline through control valve, completes insulating liquid circulation.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, the wellbore liquid leaching loss pipeline,
After lower kettle cover seal groove and natural core and false rock core sealing and pressure fluid injection autoclave body, control valve is opened, other
Control valve is turned off, if seal groove and natural core and false rock core leakproofness are bad, pressure fluid is flowed out by survey blowby gas inlet,
Wellbore liquid leaching loss pipeline is flowed out through control valve；After completing drilling fluid pressure, control valve is opened, other control valves are closed
It closes, under the action of drilling liquid pressure, filtrate is flowed out by survey blowby gas inlet, flows out wellbore liquid leaching loss pipeline through control valve.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, the confining pressure pipeline open control
Valve processed, using hydraulic pump, pressure fluid flows into confining pressure annular space by confining pressure entrance, completes sealing.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, natural core are diameter
The small rock core of 25.4mm, is easier to obtain at the scene.
The tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, autoclave body diameter range exist
Between 53.4mm-139.4mm, the pump amount of slush pump is 8.8 L/S -10.1L/S.
The tiltable and eccentric well cementation second contact surface bonding quality evaluation method, evaluation method include following step
It is rapid:
Step 1: adjusting the degree of eccentricity
A, upper kettle cover and lower kettle cover are all removed, first false rock core is put into lower kettle cover seal groove, then natural core is put into vacation
Above rock core, lower kettle cover is connected to autoclave body, kettle cover bolt is not necessarily to tighten at present for this；
B, lower adjusting screw is turned, since bolt is not tightened, rock core can be translated with lower kettle cover at this time, adjust required bias with this
Degree；
C, reach and turn lower fixing screws after the required degree of eccentricity and fix lower kettle cover, tighten bolt immediately later, and use kettle
Lid adjusts screw and regulates upper kettle cover, and upper kettle cover fixing screws fix upper kettle cover, tighten kettle cover bolt immediately later；
Step 2: adjusting hole angle
Support frame is fixed on deflecting fixed frame, tightening fixing bolt makes two support frames be connected, fixed autoclave body, rotation rotation
Arm, hole angle needed for meeting tuning drive gear corner, angle fix cursor on dial, then with cursor fixing bolt；
Step 3: Leakage Test
A, connection pressure pipeline, opens control valve, and other control valves are turned off, using infusing in the downward confining pressure annular space of hydraulic pump
Enter pressure fluid, observe the registration of pressure gauge, until registration is 2MPa, closing control valve；
B, open control valve, other control valves are turned off, using hydraulic pump into autoclave body annular space slowly injection pressure fluid,
It observes autoclave body annular space and conserves pressure value, and remain that sealed pressure is greater than autoclave body pressure 2MPa, the every raising of autoclave body annular pressure
1MPa opens control valve, has checked whether that pressure fluid scurries into mouth outflow from survey, until annular space maintenance pressure rises to subsequent water
Until mud conserves pressure and flows out without liquid from survey blowby gas inlet；
Step 4: forming mud cake, flushing liquor rinses and insulating liquid circulation
A, after ensuring leakproofness according to requirement of experiment, pipeline is connected according to circulation of drilling fluid pipeline requirements, and opens heating and protects
Temperature set is heated to 20 DEG C -200 DEG C of required temperature of experiment；
B, drilling fluid is inhaled under the action of slush pump, flows through control valve, is exported and is flowed into inside annular space by survey gas blowby, when reaching
After drilling fluid injection rate is set, closing control valve；
C, using hydraulic pump, the pressure fluid of required pressure is conserved by surveying gas blowby outlet injection drilling fluid, opens simultaneously valve,
In order to which drilling fluid filtrate smoothly can alter mouth discharge from survey；
D, according to experiment needs, maintenance a period of time (1-3 days), while the leak-off situation of drilling fluid is observed, maintenance pressure decline
Pressure is conserved needed for should being adjusted in time, after reaching curing time, closing control valve is opened control valve, arranged by annular space
Liquid mouth empties drilling fluid；
E, circulation of drilling fluid pipeline is connected, flushing liquor is commonly used before the drilling fluid in slush pump is substituted for cementing, opens
Control valve, flushing liquor are flowed into from gas blowby outlet is surveyed, are flowed out from ring drainage mouth, and washing time is according to simulation Operating condition adjustment.Punching
After the completion of washing, flushing liquor is substituted for insulating liquid, is emptied liquid in device after recycling a period of time, washing time is according to well cementation
Technique requires adjustment；
Step 5: cement injection and maintenance
A, lower kettle cover is removed, the shape of gasket is determined according to the degree of eccentricity, and is squeezed between rock core and autoclave body medial surface, then
Secondary to install lower kettle cover, kettle cover in opening is slowly injected into cement slurry into annular space using pipeline from the bottom to top, installs again
Kettle cover；
B, it opens heating and thermal insulation set and is heated to experiment set temperature, temperature is the formation temperature for simulating well section, connection maintenance pressure
Pipeline, to device inside be pumped into cement slurry conserve needed for pressure hydraulic fluid, pressure size is according to the strata pressure simulated
And cement sheath self weight analytical calculation obtains, is conserved under conditions set 1-3 days according to experiment demand；
Step 6: second contact surface bonding quality is examined
Gas injection tube line and detection pipeline are connected, control valve is only opened, other control valves are turned off, using hydraulic pump,
Mouth injection is scurried into survey through intermediate receptacle and surveys gas blowby body, and second contact surface bonding quality is detected, air pressure is gradually risen, is observed
Pressure change, that is, pressure gauge the registration and survey surveyed at blowby gas inlet are scurried out the variation of mouthful flowmeter and gas bottle, if observing
Bubble is generated in pressure gauge and flowmeter registration significant changes or gas bottle, then shows that has channeling has occurred for second contact surface, at this time
It surveys and alters the inlet pressure i.e. registration of pressure gauge then and be the pressure value that has channeling is resisted at the interface, the value is bigger to illustrate interface agglutination effect
Better.
The tiltable and eccentric well cementation second contact surface bonding quality evaluation method survey gas blowby body and use nitrogen.
The beneficial effects of the invention are as follows false rock core is provided in natural core lower end, really simulates mud cake and formed
Journey increases the area that natural core is exposed to autoclave body annular space, ensure that the sealing of rock core annular space, improves the accurate of test
Property.The present apparatus is applied widely, not only the cementing situation of second contact surface of analog difference casing eccentricity degree, but also can simulate different wells
Oblique angle influences second contact surface bonding quality.Heating mantle, flowmeter, pressure gauge are connected with computer, warm in real time monitoring apparatus
The variation of degree, pressure, second contact surface has channeling flow, and the curve that has channeling flow changes over time is made using computer, accurately
Measurement well cementation second contact surface breakthrough pressure, the cementing strength of direct evaluating cementing second contact surface instruct live has channeling prediction.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is upper kettle cover top view.
Fig. 3 is lower kettle cover top view.
Fig. 4 is tilting gearing schematic diagram.
Fig. 5 is tilting gearing top view.
Fig. 6 is deflecting fixed frame right view (being free of support frame).
Fig. 7 is cursor right view.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in figs. 1-7, tiltable of the present invention and eccentric well cementation second contact surface bonding quality evaluating apparatus mainly by
Survey blowby gas inlet 1, ring drainage mouth 2, confining pressure entrance 3, gasket 4, ring type seal 5,22, lower kettle cover 6, seal groove 7, adjusting
Screw 8,20, fixing screws 9,21, bolt 10,54, bolt translate slot 11, autoclave body 12, upper rotary table 13, lower rotary table 14, heating guarantor
Temperature set 15, false rock core 16, natural core 17, autoclave body annular space 18, upper kettle cover 19 survey gas blowby outlet 23, confining pressure annular space 24, control valve
25(the first), 26(the second), 27(third), 28(four), 29(five), 30(six), 31(seven), 32(eight), 33(
Nine), slush pump 34, pressure gauge 35(the first), 36(the second), 37(third), flowmeter 38, gas bottle 39, intermediate receptacle 40(
One), 41(the second), hydraulic pump 42(the first), 43(the second), computer 44, deflecting fixed frame 45, support frame 46(the first), 47
(the second), fixing bolt 48,49, cursor 50, cursor fixing bolt 51, dial 52, tuning drive gear 53, support frame are fixed
Slot 54, cursor fixing groove 55, pedestal 56 form.
The autoclave body is followed successively by rock core (natural core 17 and false rock core 16), heating and thermal insulation set 14, support frame from inside to outside
46,47；The natural core 17 is the small rock core of diameter 25.4mm, is easier to obtain at the scene；The natural core 17 and vacation
Rock core 16 is connected with lower kettle cover 6, ensures to seal by seal groove 7 between natural core 17 and false rock core 16 and lower kettle cover 6；It is described
Rock core lower part can squeeze into a gasket 4, and cement can be stopped to flow into lower kettle cover 6 and cementing with lower kettle cover 6；The heating and thermal insulation set 15
Inside can be with heating kettle body, simulated formation temperature inside has thermocouple and temperature sensor, computer 44 is electrically connected, to temperature
It is recorded and is monitored, meanwhile, computer 44 and pressure gauge 37 and flowmeter 38 are recorded and are supervised to its pressure and flow
Control.
The autoclave body upper and lower part is respectively arranged with rotary table 13 and lower rotary table 14 on ellipse, upper 13 side of rotary table setting
Have and adjust screw 20, the other side is provided with fixing screws 21, and lower 14 side of rotary table, which is provided with, adjusts screw 8, other side setting
There are fixing screws 9, upper rotary table adjusts screw 20 and lower rotary table adjusts screw 8 and is all provided with offset distance graduated scale, turns up-regulation
Save screw 20 or the extrudable upper kettle cover of lower adjusting screw 8 or the translation of lower kettle cover；Autoclave body and upper kettle cover and lower kettle cover all pass through annular
Sealing ring 5,22 seals.
Support frame 46,47 is fixed on deflecting fixed frame 45 by support frame fixing groove 54, and support frame 46,47 is by fixing bolt
48,49 connection, cursor 50 rotate cursor 50 on fixing bolt 49, hole angle needed for meeting 53 corner of tuning drive gear,
For angle on dial 52, cursor fixing bolt 51 passes through the fixed cursor 50 of cursor fixing groove 55.
The upper rotary table 13 is connect by bolt 46 with upper kettle cover 19, and the two ensures to seal there are sealing ring, the annular
Sealing ring 22 is in upper kettle cover, and width is greater than the maximal translation distance i.e. width of annular space of natural core；The upper kettle
There are a channels to survey gas blowby outlet 23 on lid 17, is connected with the gap of natural core 17 and upper kettle cover 19.
The lower rotary table 14 is connect by bolt 10 with lower kettle cover 6, and there are ring type seals 5 to ensure to seal for the two, described
Ring type seal 5 is in lower kettle cover 6, and width is greater than the maximal translation distance i.e. width of autoclave body annular space 18 of natural core
Degree；There are three channels on the lower kettle cover 6: first is that ring drainage mouth 2, is connected with autoclave body annular space 18, second is that surveying blowby gas inlet
1, it is connected with false 16 intermediate channel of rock core, third is that confining pressure entrance 3, is connected with confining pressure annular space 45；6 top of lower kettle cover, can be
A gasket 4 is squeezed into annular space between natural core 17 and autoclave body 12, can be isolated and stop cement to flow into lower part ring drainage
The channel of mouth 2.
All symmetrically there is bolt translation slot 11 on the upper rotary table 13 and lower rotary table 14, it is bolt in slot 11 that bolt, which translates,
10, translation 11 length of slot is greater than the translatable maximum distance of natural core, the i.e. width of autoclave body annular space 12, to guarantee to obtain
The degree of eccentricity large-scale as far as possible, and when natural core is placed in the middle, bolt 10 is located at the starting point of translation slot 11.
The second contact surface refers to the cement plane that cement sheath and natural core 17 are formed；The survey blowby gas inlet 1 can inject
High pressure gas alters second contact surface survey；The survey gas blowby outlet is connected with the gap of upper kettle cover 13 and natural core 17, collects simultaneously
The gas of second contact surface has channeling is discharged.
The survey gas blowby outlet 23 can connect three pipelines: first is that drilling fluid injects pipeline, drilling fluid injection may be implemented,
Flushing liquor, insulating liquid circulation, second is that maintenance pressure pipeline, may be implemented Leakage Test, the cement sheath maintenance, mud of seal groove 7
Cheese at when pressure the detection and collection of surveying gas blowby body may be implemented third is that has channeling gas detection pipeline；
The ring drainage mouth 2 can connected drainage pipeline, drilling fluid discharge and flushing liquor, insulating liquid circulation may be implemented；
The survey blowby gas inlet 1 can connect two pipelines: first is that has channeling gas pressurized pipeline, may be implemented has channeling gas to second
Interface input and pressurization, second is that wellbore liquid leaching loss pipeline, may be implemented the row of seal groove 7 Leakage Test and drilling fluid filtrate
It puts；
The confining pressure entrance 3 is connected with confining pressure pipeline, it can be ensured that seal groove 7 and rock core (natural core 17 and vacation rock core 16) it
Between leakproofness.
The drilling fluid injects pipeline, examines the leakproofness of seal groove 7 and rock core (natural core 17 and false rock core 16)
Afterwards, control valve 26 is only opened, other control valves are turned off, and under the action of slush pump 34, drilling fluid flows through control valve
26, autoclave body annular space 18 is flowed by survey gas blowby outlet 23；After mud cake is formed, control valve 32 is opened, by drill-in fluid from ring drainage
Mouth 2 is discharged, and the drilling fluid in slush pump 34 is substituted for flushing liquor, opens control valve 26,32, other control valves are closed
It closes, under the action of slush pump 34, flushing liquor flows through control valve 26, autoclave body annular space is flowed by survey gas blowby outlet 23, by annular space
Leakage fluid dram 2 flows out autoclave body annular space 18 through control valve 32；After flushing liquor completes circulation, the flushing liquor in slush pump 34 is replaced
At insulating liquid, control valve 26,32 is opened, other control valves are turned off, and under the action of slush pump 34, insulating liquid flows through control
Valve 2 processed flows into autoclave body annular space 18 by survey gas blowby outlet 23, by ring drainage mouth 2, flows out autoclave body annular space through control valve 32
18。
The cement conservation pressure pipeline opens control valve 25,33 before examining seal groove leakproofness, other controls
Valve is turned off, and using hydraulic pump 42, pressure fluid is by intermediate receptacle 40, through control valve 25 and pressure gauge 35, by survey gas blowby
Inside 1 injection autoclave body of outlet, with seal groove sealing pipeline cooperation, seal groove 7 and rock core (natural core 17 and false rock core are completed
16) inspection of leakproofness；After completing drilling fluid injection, control valve 25 is opened, using hydraulic pump 42, pressure fluid is by centre
Container 40 exports 1 injection pressure fluid by survey gas blowby through control valve 25 and pressure gauge 35, reaches simulation down-hole drilling fluids institute
The pressure condition being subject to, simulation mud cake are formed；Cement slurry injects after autoclave body, only opens control valve 25,33, other control valves
Door is turned off, and at this time under the action of hydraulic pump 42, opens control valve 25, other control valves are turned off, and utilize hydraulic pump
42, pressure fluid reaches inside 1 injection autoclave body of survey gas blowby outlet by intermediate receptacle 40, through control valve 25 and pressure gauge 35
Simulate underground cement pressure condition.
The has channeling gas pressurized pipeline opens control valve 30,31, other control valves are turned off, and utilize hydraulic pump
42, gas blowby body (nitrogen) is surveyed to the injection of blowby gas inlet 23 is surveyed through intermediate receptacle 41, gas enters seal groove 7 through control valve 30
It is interior, second contact surface bonding quality is detected.
The has channeling gas detection pipeline, opening control valve 27,30,31, other control valves are turned off, and gas is by surveying
23 discharge of gas blowby outlet, through control valve 27 and flowmeter 38, the gas bottle 39 by filling liquid is collected.
The ring drainage pipeline after mud cake is formed, opens control valve 32, other control valves are turned off, drilling fluid
It is discharged from ring drainage pipeline；After drilling fluid discharge, the drilling fluid in slush pump 34 is substituted for flushing liquor, in slush pump 34
Under effect, flushing liquor is flowed into inside autoclave body through control valve 26 by survey gas blowby outlet 23, body is flowed out by ring drainage mouth 2, through controlling
Valve 32 processed flows out ring drainage pipeline.After completing flushing liquor circulation, the flushing liquor in slush pump 34 is substituted for insulating liquid, every
Chaotropic is exported by survey gas blowby and is flowed into inside autoclave body through control valve 26, is flowed out body by ring drainage mouth, is flowed out through control valve 32
Ring drainage pipeline completes insulating liquid circulation.
The wellbore liquid leaching loss pipeline, to lower kettle cover seal groove 7 and rock core (natural core 17 and false rock core 16) seal with
And after pressure fluid injection autoclave body, control valve 29 is opened, other control valves are turned off, if seal groove 7 and rock core (natural rock
The heart 17 and false rock core 16) leakproofness is bad, and pressure fluid is flowed out by survey blowby gas inlet 1, flows out drilling fluid filter through control valve 29
Lose pipeline；After completing drilling fluid pressure, control valve 29 is opened, other control valves are turned off, in the effect of drilling liquid pressure
Under, filtrate is flowed out by survey blowby gas inlet 1, flows out wellbore liquid leaching loss pipeline through control valve 29.
The confining pressure pipeline opens control valve 28, and using hydraulic pump 43, pressure fluid flows into confining pressure by confining pressure entrance 3
Annular space 24 completes sealing.
Step:
1. adjusting the degree of eccentricity:
(1) upper kettle cover 19 and lower kettle cover 6 are all removed, first false rock core 16 is put into lower kettle cover seal groove 7, then by natural core
17 are put into false 16 top of rock core, lower kettle cover 6 are connected to autoclave body 12, kettle cover bolt 10 is not necessarily to tighten at present for this.
(2) lower adjusting screw 8 is turned, since bolt 10 is not tightened, rock core can be translated with lower kettle cover 6 at this time, be adjusted with this
The required degree of eccentricity.
(3) reach and turn lower fixing screws 9 after the required degree of eccentricity and fix lower kettle cover 6, tighten bolt 10 immediately later,
And adjust screw 20 with kettle cover and regulate upper kettle cover 19, upper kettle cover fixing screws 21 fix upper kettle cover 19, Zhi Houli
Tighten kettle cover bolt 46.
2. adjusting hole angle:
Support frame 46,47 is fixed on deflecting fixed frame 45, tightening fixing bolt 48,49 makes 47 phase of support frame 46 and support frame
Even, fixed autoclave body 12 rotates cursor 50, hole angle needed for meeting 53 corner of tuning drive gear, angle on dial 52, then
With the fixed cursor 50 of cursor fixing bolt 51.
3. Leakage Test:
(1) connection pressure pipeline, opens control valve 28, and other control valves are turned off, and utilizes the downward confining pressure ring of hydraulic pump 43
Injection pressure fluid in sky 24 observes the registration of pressure gauge 36, until registration is 2MPa, closing control valve 28.
(2) control valve 25,33 is opened, other control valves are turned off, slow into autoclave body annular space 18 using hydraulic pump 42
Slow injection pressure fluid, observation autoclave body annular space conserve pressure value, and remain that sealed pressure is greater than autoclave body pressure 2MPa, autoclave body
The every raising 1MPa of 18 pressure of annular space opens control valve 29, has checked whether that pressure fluid scurries into mouth outflow from survey, until annular space
Until maintenance pressure rises to subsequent cement conservation pressure and flows out without liquid from survey blowby gas inlet.
4. forming mud cake, flushing liquor rinses and insulating liquid circulation:
(1) after ensuring leakproofness according to requirement of experiment, pipeline is connected according to circulation of drilling fluid pipeline requirements, and opens heating and protects
Temperature set 15 is heated to experiment required temperature.
(2) drilling fluid is inhaled under the action of slush pump 34, flows through control valve 26, flows into annular space by survey gas blowby outlet 23
Inside, after reaching setting drilling fluid injection rate, closing control valve 26.
(3) hydraulic pump 42 is utilized, by the pressure fluid of pressure needed for surveying 23 injection drilling fluid maintenance of gas blowby outlet, simultaneously
Valve 29 is opened, in order to which drilling fluid filtrate smoothly can alter mouth discharge from survey.
(4) according to experiment needs, maintenance a period of time, while the leak-off situation of drilling fluid is observed, maintenance pressure decline is answered
Pressure is conserved needed for being adjusted in time, after reaching curing time, closing control valve 25 and 29 opens control valve 32, passes through
Ring drainage mouth 2 empties drilling fluid.
(5) circulation of drilling fluid pipeline is connected, the drilling fluid in slush pump 34 is substituted for commonly use before cementing and is rinsed
Liquid, opens control valve 26, and flushing liquor is flowed into from gas blowby outlet 23 is surveyed, flowed out from ring drainage mouth 2, washing time is according to simulation
Operating condition adjustment.After the completion of flushing, flushing liquor is substituted for insulating liquid, empties liquid in device after recycling a period of time, is rinsed
Time requires to adjust according to well shaft fixing technology.
5. cement injection and maintenance:
(1) remove lower kettle cover 6, the shape of gasket 4 determined according to the degree of eccentricity, and squeezed into rock core and autoclave body medial surface it
Between, lower kettle cover 6 is installed again, and kettle cover 19 in opening is slowly injected into cement slurry into annular space using pipeline, again from the bottom to top
Install kettle cover 6.
(2) it opens heating and thermal insulation set 15 and is heated to experiment set temperature, temperature is the formation temperature for simulating well section, and connection is supported
Shield pressure pipeline, to device inside be pumped into cement slurry conserve needed for pressure hydraulic fluid, pressure size is according to the ground simulated
Stressor layer and cement sheath self weight analytical calculation obtain, conserve certain time under conditions set according to experiment demand.
6. second contact surface bonding quality is examined:
(1) connection gas injection tube line and detection pipeline, only open control valve 30,31, and other control valves are turned off, and are utilized
Hydraulic pump 42 scurries into mouth injection to survey through intermediate receptacle 41 and surveys gas blowby body (nitrogen), detects to second contact surface bonding quality,
Gradually rise air pressure, the registration for pressure change, that is, pressure gauge 37 that observation is surveyed at blowby gas inlet 1 and survey are scurried out mouthful flowmeter 38
With the variation of gas bottle 39, bubble is generated in pressure gauge 37 and 38 registration significant changes of flowmeter or gas bottle if observing,
Then show that has channeling has occurred for second contact surface, surveying alter the inlet pressure i.e. registration of pressure gauge 37 at this time is then that has channeling is resisted at the interface
Pressure value, the value is bigger to illustrate that interface agglutination effect is better.
The present invention is not limited to above-mentioned preferred forms, anyone obtain under the inspiration of the present invention other it is any with
The identical or similar product of the present invention, is within the scope of the present invention.
Claims (10)
1. a kind of tiltable and eccentric well cementation second contact surface bonding quality evaluating apparatus, including autoclave body, control valve, slush pump
(34), pressure gauge, flowmeter (38), gas bottle (39), intermediate receptacle, hydraulic pump, computer (44), deflecting fixed frame (45),
Support frame, cursor (50) and dial (52)；It is characterized by: autoclave body is followed successively by natural core (17), false rock from inside to outside
The heart (16), heating and thermal insulation set (14), support frame (46,47), autoclave body upper and lower part is respectively arranged with rotary table on ellipse (13)
With lower rotary table (14)；The natural core (17), false rock core (16) are connected with lower kettle cover (6), natural core (17), false rock core
(16) ensure to seal by seal groove (7) between lower kettle cover (6)；Heating and thermal insulation set (15) can be with heating kettle body inside, simulation
Formation temperature inside has thermocouple and temperature sensor, is electrically connected computer (44), is recorded and monitored to temperature, meanwhile,
Computer (44) and pressure gauge (37) and flowmeter (38), are recorded and are monitored to its pressure and flow；
Autoclave body upper and lower part is respectively arranged with rotary table on ellipse (13) and lower rotary table (14), and upper rotary table (13) side is provided with
It adjusts screw (20), the other side is provided with fixing screws (21), and lower rotary table (14) side, which is provided with, adjusts screw (8), the other side
It is provided with fixing screws (9), upper rotary table adjusts screw (20) and lower rotary table adjusts screw (8) and is all provided with offset distance scale
Ruler turns and adjusts screw (20) or the extrudable upper kettle cover of lower adjusting screw (8) or the translation of lower kettle cover；
Support frame is fixed on deflecting fixed frame (45), and support frame (46,47) is connected by fixing bolt (48,49), rotation rotation
Arm (50), hole angle needed for meeting tuning drive gear (53) corner, angle on dial (52), fixed by cursor by cursor
Bolt (51) is fixed；
Upper rotary table (13) is connect by bolt (46) with upper kettle cover (19), and the two ensures to seal there are sealing ring, and the annular is close
Seal (22) is in upper kettle cover, and width is greater than the maximal translation distance i.e. width of annular space of natural core；Upper kettle cover
(17) there are a channels to survey gas blowby outlet (23) on, is connected with the gap of natural core (17) and upper kettle cover (19)；
Lower rotary table (14) is connect by bolt (10) with lower kettle cover (6), and there are ring type seal (5) to ensure to seal for the two, annular
Sealing ring (5) is in lower kettle cover (6), and width is greater than the maximal translation distance i.e. width of autoclave body annular space (18) of natural core
Degree；There are three channels on lower kettle cover (6): first is that ring drainage mouth (2), is connected with autoclave body annular space (18), entering second is that surveying gas blowby
Mouth (1), is connected, third is that confining pressure entrance (3), is connected with confining pressure annular space (45) with false rock core (16) intermediate channel；On lower kettle cover (6)
Portion can squeeze into a gasket (4) in the annular space between natural core (17) and autoclave body (12), can be isolated and cement be stopped to flow into
The channel of lower part ring drainage mouth (2)；
All symmetrically there is bolt translation slot (11) on upper rotary table (13) and lower rotary table (14), it is bolt in slot (11) that bolt, which translates,
(10), translation slot (11) length is greater than the translatable maximum distance of natural core, the i.e. width of autoclave body annular space (12), to protect
Card obtains the large-scale as far as possible degree of eccentricity, and when natural core is placed in the middle, bolt (10) is located at the starting point of translation slot (11)；
Second contact surface refers to cement sheath and the cement plane that natural core (17) are formed；The survey blowby gas inlet (1) can inject high pressure
Gas alters second contact surface survey；The survey gas blowby outlet is connected with the gap of upper kettle cover (13) and natural core (17), collects simultaneously
The gas of second contact surface has channeling is discharged；
Three pipelines can be connected by surveying gas blowby outlet (23): first is that drilling fluid injects pipeline, drilling fluid injection may be implemented, rinse
Liquid, insulating liquid circulation；Second is that maintenance pressure pipeline, may be implemented Leakage Test, the cement sheath maintenance, mud cake of seal groove (7)
Pressure when formation；Third is that has channeling gas detection pipeline, may be implemented the detection and collection of surveying gas blowby body；
Ring drainage mouth (2) can connected drainage pipeline, realization drilling fluid discharge and flushing liquor, insulating liquid circulation；
Two pipelines can be connected by surveying blowby gas inlet (1): first is that has channeling gas pressurized pipeline, realizes that has channeling gas is defeated to second contact surface
Enter and pressurizes；Second is that wellbore liquid leaching loss pipeline, realizes the discharge of seal groove (7) Leakage Test and drilling fluid filtrate；
Confining pressure entrance (3) is connected with confining pressure pipeline, it is ensured that close between seal groove (7) and natural core (17) and false rock core (16)
Feng Xing.
2. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the drilling fluid injects pipeline, examines the leakproofness between seal groove (7) and natural core (17) and false rock core (16)
Afterwards, control valve (26) only are opened, other control valves are turned off, and under the action of slush pump (34), drilling fluid flows through control
Valve (26) flows into autoclave body annular space (18) by survey gas blowby outlet (23), closing control valve (26)；After mud cake is formed, control is opened
Drilling fluid is discharged from ring drainage mouth (2), the drilling fluid in slush pump (34) is substituted for flushing liquor by valve (32) processed, then
It opens control valve (26), other control valves are turned off, and under the action of slush pump (34), flushing liquor flows through control valve
(26), autoclave body annular space is flowed by survey gas blowby outlet (23), by ring drainage mouth (2), flows out autoclave body annular space through control valve (32)
(18)；After flushing liquor completes circulation, the flushing liquor in slush pump (34) is substituted for insulating liquid, the effect in slush pump (34)
Under, insulating liquid flows through control valve (26), autoclave body annular space (18) is flowed by survey gas blowby outlet (23), by ring drainage mouth (2), warp
Control valve (32) flows out autoclave body annular space (18).
3. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the maintenance pressure pipeline is opened control valve (25,33), other control valves are equal before examining seal groove leakproofness
It closes, using hydraulic pump (42), pressure fluid is altered through control valve (25) and pressure gauge (35) by survey by intermediate receptacle (40)
Gas exports inside (1) injection autoclave body；After completing drilling fluid injection, opens control valve (25), utilize hydraulic pump (42), pressure
Fluid is by intermediate receptacle (40), through control valve (25) and pressure gauge (35), exports (1) injection pressure fluid by survey gas blowby, reaches
To pressure condition suffered by simulation down-hole drilling fluids, simulation mud cake is formed；Cement slurry injects after autoclave body, only opens control valve
Door (25,33), other control valves are turned off, and at this time under the action of hydraulic pump (42), are opened control valve (25), other controls
Valve processed is turned off, and using hydraulic pump (42), pressure fluid is by intermediate receptacle (40), through control valve (25) and pressure gauge
(35), inside by survey gas blowby outlet (1) injection autoclave body, reach simulation underground cement pressure condition.
4. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the has channeling gas pressurized pipeline is opened control valve (30,31), other control valves are turned off, and utilize hydraulic pump
(42), gas blowby body is surveyed to blowby gas inlet (23) injection is surveyed through intermediate receptacle (41), gas enters seal groove through control valve (30)
(7) in, second contact surface bonding quality is detected.
5. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the has channeling gas detection pipeline is opened control valve (27,30,31), other control valves are turned off, and gas is by surveying
Gas blowby exports (23) discharge, and through control valve (27) and flowmeter (38), the gas bottle (39) by filling liquid is collected.
6. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the ring drainage pipeline after mud cake is formed, is opened control valve (32), other control valves are turned off, drilling fluid from
The discharge of ring drainage pipeline；After drilling fluid discharge, the drilling fluid in slush pump (34) is substituted for flushing liquor, in slush pump (34)
Under the action of, flushing liquor is flowed into inside autoclave body through control valve (26) by survey gas blowby outlet (23), is flowed by ring drainage mouth (2)
Autoclave body annular space out flows out ring drainage pipeline through control valve (32)；After completing flushing liquor circulation, by rushing in slush pump (34)
Washing lotion is substituted for insulating liquid, and insulating liquid is exported by survey gas blowby and flowed into inside autoclave body, flowed by ring drainage mouth through control valve (26)
Body out flows out ring drainage pipeline through control valve (32), completes insulating liquid circulation.
7. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the wellbore liquid leaching loss pipeline carries out lower kettle cover seal groove (7) and natural core (17) and false rock core (16) leakproofness
When inspection, open control valve (29), other control valves are turned off, if leakproofness is bad, pressure fluid is by survey blowby gas inlet
(1) it flows out, flows out wellbore liquid leaching loss pipeline through control valve (29)；After completing drilling fluid pressure, open control valve (29),
Under the action of drilling liquid pressure, filtrate is flowed out by survey blowby gas inlet (1), flows out wellbore liquid leaching loss pipeline through control valve (29).
8. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the confining pressure pipeline is opened control valve (28), and using hydraulic pump (43), pressure fluid is flowed by confining pressure entrance (3) to be enclosed
Pressure ring sky (24) completes sealing.
9. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluating apparatus, feature
Be: the natural core (17) is the small rock core of diameter 25.4mm, is easier to obtain at the scene.
10. tiltable according to claim 1 and eccentric well cementation second contact surface bonding quality evaluation method, feature
Be: evaluation method includes the following steps:
Step 1: adjusting the degree of eccentricity
A, upper kettle cover (19) and lower kettle cover (6) are all removed, first false rock core (16) is put into lower kettle cover seal groove (7), then will
Natural core (17) is put into above false rock core (16), and lower kettle cover (6) is connected to autoclave body (12), this kettle cover bolt (10) nothing at present
It need to tighten；
B, lower adjusting screw (8) is turned, rock core can be translated with lower kettle cover (6) at this time, adjust the required degree of eccentricity with this；
C, reach and turn lower fixing screws (9) after the required degree of eccentricity and fix lower kettle cover (6), tighten bolt immediately later
(10), it and adjusts screw (20) with kettle cover to regulate upper kettle cover (19), upper kettle cover fixing screws (21) are by upper kettle cover (19)
It fixes, tightens kettle cover bolt (46) immediately later；
Step 2: adjusting hole angle
Support frame (46,47) is fixed on deflecting fixed frame (45), tightening fixing bolt (48,49) makes support frame (46) and branch
Support (47) is connected, and fixed autoclave body (12) rotate cursor (50), hole angle needed for meeting tuning drive gear (53) corner, angle
Degree fixes cursor on dial (52), then with cursor fixing bolt；
Step 3: Leakage Test
A, confining pressure pipeline is connected, is opened control valve (28), other control valves are turned off, using hydraulic pump (43) to confining pressure ring
Empty (24) interior injection pressure fluid, observes the registration of pressure gauge (36), until registration is 2MPa, closing control valve (28)；
B, connection maintenance pressure pipeline, is opened control valve (25,33), other control valves are turned off, and are utilized hydraulic pump (42)
To slowly injection pressure fluid in autoclave body annular space (18), observation autoclave body annular space conserves pressure value, timely adjustment sealed pressure, always
It keeps sealed pressure to be greater than autoclave body pressure 2MPa, the every raising 1MPa of autoclave body annular space (18) pressure, opens control valve (29), examine
Whether have pressure fluid from survey scurry into mouth outflow, until annular space maintenance pressure rise to subsequent cement conservation pressure and without liquid from
Until surveying blowby gas inlet outflow；
Step 4: forming mud cake, flushing liquor rinses and insulating liquid circulation
A, after ensuring leakproofness according to requirement of experiment, pipeline is connected according to circulation of drilling fluid pipeline requirements, and opens heating and protects
Temperature set (15) is heated to 20 DEG C -200 DEG C of required temperature of experiment；
B, drilling fluid is inhaled under the action of slush pump (34), flows through control valve (26), flows into ring by survey gas blowby outlet (23)
It is empty internal, after reaching setting drilling fluid injection rate, closing control valve (26)；
C, using hydraulic pump (42), the pressure fluid of pressure needed for drilling fluid conserves is injected by surveying gas blowby outlet (23), simultaneously
It opens valve (29), in order to which drilling fluid filtrate smoothly can alter mouth discharge from survey；
D, it according to experiment needs, conserves 1-3 days, while observing the leak-off situation of drilling fluid, maintenance pressure decline should be adjusted in time
To required maintenance pressure, after reaching curing time, closing control valve (25,29) is opened control valve (32), is arranged by annular space
Liquid mouth (2) empties drilling fluid；
E, circulation of drilling fluid pipeline is connected, commonly uses flushing liquor before the drilling fluid in slush pump (34) is substituted for cementing,
Open control valve (26), flushing liquor from survey gas blowby outlet (23) flow into, from ring drainage mouth (2) flow out, washing time according to
Simulate Operating condition adjustment；After the completion of flushing, flushing liquor is substituted for insulating liquid, empties liquid in device after recycling a period of time,
Washing time requires to adjust according to well shaft fixing technology；
Step 5: cement injection and maintenance
A, lower kettle cover (6) are removed, the shape of gasket (4) is determined according to the degree of eccentricity, and are squeezed into rock core and autoclave body medial surface
Between, it installs again lower kettle cover (6), kettle cover (19), is slowly injected into cement into annular space using pipeline from the bottom to top in opening
Slurry, installs kettle cover (6) again；
B, heating and thermal insulation set (15) are opened and are heated to experiment set temperature, temperature is the formation temperature for simulating well section, connection maintenance
Press pipeline, to device inside be pumped into cement slurry conserve needed for pressure hydraulic fluid, pressure size is according to the stratum simulated
Pressure and cement sheath self weight analytical calculation obtain, are conserved under conditions set 1-3 days according to experiment demand；
Step 6: second contact surface bonding quality is examined
Gas injection tube line and detection pipeline are connected, only opens control valve (30,31), other control valves are turned off, and are utilized
Hydraulic pump (42) scurries into mouth injection to survey through intermediate receptacle (41) and surveys gas blowby body, detects to second contact surface bonding quality, by
Edge up hyperbar, and the reading for pressure change, that is, pressure gauge (37) that observation is surveyed at blowby gas inlet (1) and survey are scurried out a mouthful flowmeter
(38) and the variation of gas bottle (39), if observing pressure gauge (37) and flowmeter (38) reading significant changes or gas bottle
Interior generation bubble then shows that has channeling has occurred for second contact surface, and surveying alter the reading of inlet pressure i.e. pressure gauge (37) at this time is then this
The pressure value of has channeling is resisted at interface, and the value is bigger to illustrate that interface agglutination effect is better.
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| CN201811553824.6A CN109386277B (en) | 2018-12-19 | 2018-12-19 | Tiltable and eccentric cementing quality evaluation device and method for second interface of well cementation |
| CN202010551200.1A CN111622743B (en) | 2018-12-19 | 2018-12-19 | Tiltable and eccentric cementing second interface cementing quality evaluation method |
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| CN110552684A (en) * | 2019-09-17 | 2019-12-10 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | simulation environment cement channeling-preventing capability evaluation device and method |
| CN111044382A (en) * | 2019-12-30 | 2020-04-21 | 西南石油大学 | Experimental device for hydraulically simulating non-uniform confining pressure of casing and using method |
| CN111175208A (en) * | 2019-12-24 | 2020-05-19 | 中国地质大学（北京） | Drilling fluid mud cake permeability evaluation device and method |
| CN111596042A (en) * | 2020-05-13 | 2020-08-28 | 中国石油集团渤海钻探工程有限公司 | Real-time evaluation device and evaluation method for sedimentation stability of well cementation cement slurry |
| CN111663935A (en) * | 2019-03-08 | 2020-09-15 | 中石化石油工程技术服务有限公司 | Method and system for evaluating shaft annulus air tightness |
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| CN113899888A (en) * | 2021-12-10 | 2022-01-07 | 成都理工大学 | Device and method for evaluating cement paste condensation quality of slide-resistant pile |
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| CN111622743A (en) | 2020-09-04 |
| CN111622743B (en) | 2022-01-25 |
| CN109386277B (en) | 2020-07-17 |
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