CN108007746A - Zircon English ceramic fine bead prepares the performance test of oil well anti-gas-leak well cementation test block - Google Patents
Zircon English ceramic fine bead prepares the performance test of oil well anti-gas-leak well cementation test block Download PDFInfo
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- CN108007746A CN108007746A CN201711168611.7A CN201711168611A CN108007746A CN 108007746 A CN108007746 A CN 108007746A CN 201711168611 A CN201711168611 A CN 201711168611A CN 108007746 A CN108007746 A CN 108007746A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; ceramics; glass; bricks
Abstract
The present invention provides the performance test that a kind of zircon English ceramic fine bead prepares the well cementation test block of oil well anti-gas-leak,By G grades of 40~50 wt% of oil-well cement,10~15 wt% of superfine cement,Particle diameter is 50~300 μm of hollow 25~35 wt% of quartz-ceramics microballon of closed pore,5~7 wt% of flyash of loss on ignition 1.1%,99.9% calcium oxide of purity, 1.5~2 wt%,Sodium sulphate 0.5~1.0 wt% and 1~5wt% of silica flour are sampled,Obtain mixture,The sum of percentage by weight of above component is 100%,Mixture stirs evenly,Sized mixing with 0.5~0.7 ratio of mud,Add the aluminium foaming agent that mixture gross weight is 0.2~0.5%,It is prepared into dilatant slurry,Carry out the density of dilatant slurry,Acid-base value measures,Uniformity test,Rate of change of the density is tested and anti-gas-leak performance test.
Description
Technical field
The present invention relates to the performance test that modified zircon English ceramic fine bead prepares the well cementation test block of oil well anti-gas-leak, belong to material
Technology is led.
Background technology
At present, both at home and abroad in oil well cementing, extremely-low density cement is used for high temperature and pressure oil well, but use flyash
Floating bead, compression strength is low, and cement slurry density change rate is big, after the static solidification of cement mortar, leaks air, blind hole, in addition, fine coal
The ratio of the palliatives such as grey floating bead must be controlled within 40%, and otherwise, palliative can influence the pressure resistance of cementing concrete test block
Degree, the density of palliative cement briquette within 40% is in 1.2g/cm3More than, depending merely on the ratio of increase palliative reduces cement
The density of test block is infeasible.
The content of the invention
Using the material of modified zirconium Quartz ceramic material as palliative, foaming agent is added in cement mortar, forms expansion
Slurries, reduce the density of slurries, prevent slurries from, because of weightlessness, leaking air in well cementation, anti-pressure ability decline.
Its technical solution is：
Modified zircon English ceramic fine bead prepares the performance test of oil well anti-gas-leak well cementation test block, comprises the following steps：
A, the preparation of the hollow zircon English composite material ceramic fine bead of modified closed pore：
The preparation of the first step, base-material：By 1~50 μm of silica flour of particle diameter, 5~50 μm of zirconia powders of particle diameter, 20~50 μm of aluminium oxide
Powder is by weight：70~85wt%：10~20wt%：20~30wt% is sampled, and obtains mixed powder, the percentage by weight of above component
The sum of be 100%；
The modified firing of second step, base-material：The first step is obtained after mixture stirs evenly, to add the 5 of mixed powder gross weight
~8wt% also primary resins stir evenly in mixer, and blank is pressed into harder, when 100~300 DEG C of dryings 6~12 are small,
When insulation firing 2~4 is small in 1500~1650 DEG C of electric reduction furnaces, modified zircon English ceramic block is obtained by replacing reaction,
Modified zircon English chemical composition changes, and zirconium oxide makes zircon English intensity enhancing, and aluminium oxide makes zircon English resistance to elevated temperatures
Improve, molecular link attraction increase so that the resistance to compression of zircon English ceramic fine bead, anti-folding, anti-erosion, anti-aging, acid and alkali-resistance, resistance to height
Warm nature can improve；
The preparation of 3rd step, modified solid zircon English ceramic fine bead：Second step is obtained into zircon English ceramic block on balling machine
Be processed into the solid zircon English ceramic fine bead of 5~50 μm of spherical shapes of particle diameter, nodularization processing is that wind turbine blows afloat material, material it
Between rotary motion phase mutual friction be spherical particle, uniform wall thickness, the particle of spherical shape is uniform in each particle stress distribution,
Compression strength is big；
4th step, change the preparation of zirconium zircon English ceramics slurries：The percentage of zircon English slurries forms：5~50 μm of solid zirconiums of particle diameter
65~70 wt% of quartz-ceramics microballon：30~35 wt% of water；
5th step, add foaming agent：Urea is added in the zircon English ceramics slurries prepared to the 4th step, concentration is 1~3g/L, is used
N2H4CO, when the temperature in stove is increased to 135 DEG C, is decomposed as foaming agent and is produced CO2And NH3, increase ceramic fine bead volume
Greatly.
It is prepared by the 6th step, the modified hollow zircon English composite material ceramic fine bead of closed pore：5th step mixed serum is fully stirred
Filtering is mixed, using high-pressure injection high speed centrifugation rotary spraying technique, microballoon is formed, in the oxygen-enriched combustion that multi-region vertical drop controls respectively
Burn on stove by dehydration, expansion, high temperature sintering, melt surface vitreous, balling-up, clean classification by wind-force and obtain wall thickness 15~50
μm, the hollow zircon English ceramic fine bead of 50~300 μm of closed pores of particle diameter, inorganic mineral material prepare floating bead wall thickness it is artificially controllable,
In 120~300MPa, compression strength depends on the content of zircon English and forms modified closed pore by high temperature sintering compression strength
Hollow zircon English ceramic fine bead；
B, the modified hollow zircon English ceramic fine bead of closed pore prepares the well cementation test block of oil well anti-gas-leak：
The first step, dispensing：The dispensing of anti-gas-leak well cementation test block：By G grades of 40~50wt% of oil-well cement, superfine cement 10~
15wt%, particle diameter be 50~300 μm 25~35wt% of the hollow zircon English ceramic fine bead of closed pore, loss on ignition 1.1% flyash 5~
7wt%, pure 99.9% calcium oxide, 1.5~2 wt%, 1~5wt% of 0.5~1.0wt% of sodium sulphate and silica flour, obtain mixture, above group
The sum of percentage by weight divided is 100%, and using the flyash of loss on ignition 1.1%, according to accumulation principle, flyash mainly fills up G
Gap between two kinds of material particle sizes of level oil-well cement and zircon English closed pore hollow ceramic microspheres, the different particle of particle diameter are tangent two-by-two
When, the gap between tangent circle is filled by flyash, G grades of oil-well cements and glass microballoon grain is combined closely, but in usage amount
It should control and within the specific limits, that is, control in the range of 5~7 % of gross weight, otherwise, influence the strong of high temperature high voltage resistant test block
Degree, secondly the flyash generated by high temperature sintering, active, significantly improves the hydration rate of slurries, loss on ignition is low
Flyash needs the ratio of mud small, contributes to the early strong of test block of cementing the well, 99.9% calcium hydroxide of purity, calcium oxide purity is higher, activity
Stronger, hydration rate is fast, and generates gelatinous material calcium hydroxide, and beneficial to the early strong of slurries, temperature plays by force the early of test block
Important effect, the calcium hydroxide secondly generated after aquation is in alkalescence, can adjust the pH value of slurries, under weak basic condition,
The early strength of high temperature high voltage resistant oil-well cement can be improved, sodium sulphate is a kind of fluid loss agent, and drop dehydration effect is obvious, sodium sulphate
In sodium ion, have the function of reverse osmosis, diffusion velocity is fast, slurries is separated out part water in solidification, and how much is sodium sulphate dosage,
Drop dehydration to slurries plays an important role, and is reacted using activated silica, aluminium and G a grade oil-well cement and generates hydrated calcium silicate gel
Shape and other gels, add the flow resistance in cement grout gap and the pressure in gap, reduce particle in well cementation test block
Gap, improves the structure of slurries, reduces the permeability of well cementation test block, improves the compactness and compression strength of well cementation test block；
Second step, anti-gas-leak test block dilatant slurry preparation：Mixture is mixed to get by the percentage by weight sampling of the first step,
And stir evenly mixture, sized mixing with 0.5~0.7 ratio of mud, wherein ash is mixture, adding mixture gross weight is
0.2~0.5% aluminium foaming agent, aluminium foaming agent be aluminium powder cream, aluminium powder or aluminium compound one kind therein, aluminium foaming agent aquation
Reaction generation bubble, forms the slurries of expansion, reduces the density of slurries, reduces pressure, activated silica, aluminium and G grades of oil accordingly
Well cement react generation hydrated calcium silicate gel shape material and other gels, the structure hole of cement mortar diminish, crushing resistance
Enhancing, slurries are aspirated by liquid pump, spray the outer surface to high speed revolving drum, and centrifugal force is produced by slurries in outer surface of cylinder
Shed, Stirring is shed in realization；
3rd step, testing performance index：
A, the density measurement of dilatant slurry：The dilatant slurry for taking second step to prepare, pours into and density is weighed in fluid densitometer, expands
The density of slurries is in 0.8~1.2g/cm3Between, for the density of this slurries extremely-low density, the compression strength of test block is big, uses
Modified zirconium Quartz ceramic material, the resistance to compression of the raising hollow zircon English ceramic fine bead of closed pore, anti-folding, anti-erosion, anti-aging property；
B, the measure of dilatant slurry acid-base value：The dilatant slurry for taking second step to prepare, is poured into pH value tester, shows pH value,
The pH value of dilatant slurry is between 9.0~10.5；
C, the uniformity test of slurries：Take second step to prepare dilatant slurry and pour into settlement barrel, 0.5 it is small when after observe homogeneity, surely
Qualitative, homogeneity is that the hollow zircon English ceramic fine bead of closed pore is mutually merged with slurries, and stability is no longer floating fluctuation up and down, micro-
Pearl is evenly distributed in dilatant slurry；
D, the rate of change of the density experiment of test block：Second step is prepared into slurries, pours into one group of three pieces of length and width, high respectively 53mm*
In 53mm*53mm die trials, conserved respectively in the water-bath curing box of 52 DEG C of constant temperature 24 it is small when, 48 it is small when, 96 it is small when, after the demoulding
When immersion 1 is small in cold water, the test block after solidification is put into the enterprising line density change rate of forcing press and is tested, tries fast variable density
Rate is less than 0.02%；
E, anti-gas-leak performance test：Gas leakage occurs in slurries in process of setting, i.e., from mecystasis to the process of Solid State Transformation
In, take dilatant slurry prepared by second step to pour into gas leakage analogue experiment installation, gas leakage analogue experiment installation includes stent, remote control
Oblique angle regulator, central tube, outer tube, pressurization hole, pressure tap, top cover labyrinth, lower sealing cover, the filter screen of electric digital display,
Central tube runs through outer tube, and center pipe diameter has a plurality of specifications, and between 10~200cm of internal diameter, ring is formed between central tube and outer tube
Sky, annular space are mineshaft annulus, and central tube is equipped with micropore with outer tube, by the slurries injection of expansion wherein, other component peaces
On stent, test bracket angle of inclination is in the gap of influence of 0~90 degree of change to gas leakage, central tube and outer tube to slurries
Influence, the density of slurries influence to gas leakage of the quantity of dehydration to gas leakage, drop in the influence of setting time and gas leakage, and slurries are weightless
Influence to gas leakage, hydration reaction drop dehydration is excessive, causes volume contraction excessive, and pressure is directly proportional to depth, adds from pressurization hole
Pressure, for pressurization scope from 1~350MPa, pressure tap access digital pressure sensor, measures the slurries static pressure that annular space expands, filtering
The online quantity equipped with leak-off hole metering drop dehydration, fluid loss should be in 10~50mL/30min, and single-factor measures density, inclines respectively
The influence of oblique angle, pressure to drop dehydration, the influence of multiple-factor density, inclination angle, force combination measurement to drop dehydration, drop dehydration are more
Few directly related with gas leakage, drop dehydration excessively causes the gap and crack of test block, prevents that slurries are weightless in solidification, test block of cementing the well
One of the reason for gas leakage, compressive load per unit area was bigger since the density for test block of cementing the well is bigger, with well cementation depth down, bottom pressure
Power is bigger, collapses, and using expanding cement, reduces the density of slurries, so that the pressure in shaft bottom is reduced, it is raw in hydration process
Gelled material, the basal body structure hole of cement mortar diminish, and form high vapour lock well cementation test block, reduce the infiltration of well cementation test block
Rate, improves the flow of pore resistance of well cementation test block.
Oil-producing region is in safe operation state, improve the quality of well recovery, slurries are in process of setting, constriction coefficient
It is small, the weightlessness of slurries is solved, reduces the density of slurries, spawn forms film, stops the invasion of aqueous vapor, be anti-well cementation
The key technology of gas leakage.
Using low-density cement mortar, palliative ratio is excessive, and compression strength declines, and weightlessness easily occurs in slurries well cementing process,
Palliative ratio is too small, and cement slurry density is excessive, and base pressure is bigger, collapses, and is the technical barrier that can not go beyond, and uses
Material it is different, its chemical property is also different.
The present invention has the following advantages.
1st, the displacement reaction by thermal reduction, generates the modified ceramic material containing high silicon, it is hollow to improve zircon English closed pore
The performance such as the resistance to compression of ceramic fine bead, anti-folding, anti-erosion, anti-aging.
2nd, using the slurries of expansion, the density of slurries is reduced, so as to reduce the pressure in shaft bottom.
3rd, activated silica, aluminium and G a grade oil-well cement, which react, generates hydrated calcium silicate gel shape material and other gels, water
The basal body structure hole of mud diminishes, and forms high vapour lock well cementation test block, reduces the permeability of well cementation test block, improves well cementation examination
The flow of pore resistance of block.
Brief description of the drawings
Fig. 1 is the structure diagram of the testing stand of the anti-gas-leak performance test of the embodiment of the present invention.
1, stent 2, the oblique angle regulator 3 of remote control electric digital display, lower sealing cover 4, beaker 5, mistake wherein in figure
Strainer 6, outer tube 7, central tube 8, top cover labyrinth 9, pressure tap 10, pressurization hole 11, compression pump 12, digital pressure sensor.
Embodiment
Embodiment 1.
Zircon English ceramic fine bead prepares the performance test of oil well anti-gas-leak well cementation test block, comprises the following steps：
A, the preparation of zircon English closed pore hollow ceramic microspheres：
The preparation of the first step, base-material：By 20 μm of ZrO2 powders of particle diameter, 30 μm of zirconia powders of particle diameter, 20 μm of alumina powders by weight
Than： 70wt%：20wt%：10wt% is sampled；
The modified firing of second step, base-material：After the first step is mixed evenly, the 5wt% of mixed powder gross weight is added
Also primary resin stirs evenly in mixer, and blank is pressed into harder, when 150 DEG C of dryings 10 are small, in 1500 DEG C of reduction electricity
When insulation firing 4 is small in stove, modified zircon English ceramic block is obtained by replacing reaction, modified zircon English chemical composition occurs
Changing, zirconium oxide makes zircon English intensity enhancing, and aluminium oxide improves zircon English heat resistance, the increase of molecular link attraction, resistance to compression,
Anti- folding, anti-erosion, anti-aging, acid and alkali-resistance, resistance to elevated temperatures improve；
The preparation of 3rd step, modified solid zircon English ceramic fine bead：Second step is obtained zircon English block to process on balling machine
The solid zircon English ceramic fine bead of 30 μm of spherical shapes of particle diameter is made.
It is prepared by the 4th step, zircon English ceramics slurries：The percentage of zircon English slurry forms：The solid zircon English of 30 μm of particle diameter
Ceramic fine bead 70wt%：Water 30wt%.
5th step, add foaming agent：Urea, concentration 1.5g/ are added in the zircon English ceramics slurries prepared to the 4th step
L, uses N2H4CO, when the temperature in stove is increased to 135 DEG C, is decomposed as foaming agent and is produced CO2And NH3, make ceramic fine bead volume
Increase.
It is prepared by the 6th step, the modified hollow zircon English ceramic fine bead of closed pore：5th step mixed serum is sufficiently stirred filtering, is adopted
With high-pressure injection high speed centrifugation rotary spraying technique, microballoon is formed, by de- on the combustion furnace of multi-region vertical drop zonal control
Water, expansion, high temperature sintering, melt surface vitreous, balling-up, clean classification by wind-force and obtain the hollow zircon English pottery of 250 μm of closed pores
Porcelain microballon, the hollow zircon English ceramic fine bead wall thickness of closed pore is at 50 μm, and more than the wall thickness of other floating beads, compression strength is in 200MPa.
B, the modified hollow zircon English ceramic fine bead of closed pore prepares oil well anti-gas-leak test block.
The first step, the dispensing of anti-gas-leak test block：G grades of oil-well cement 48wt%, superfine cement 15wt%, particle diameter are 250 μm
20 μm of flyash 5wt% of particle diameter, 99.9% calcium hydroxide of purity of zircon English closed pore hollow ceramic microspheres 27wt%, loss on ignition 1.1%
2.0wt%, sodium sulphate 1.0wt% and 5 μm of silica flour 2wt% of particle diameter, obtain mixture.
Second step, anti-gas-leak test block dilatant slurry preparation：It is mixed to get by the percentage by weight sampling of the first step mixed
Material is closed, and mixture is stirred evenly, is sized mixing with 0.55 ratio of mud, adds the aluminium powder cream that mixture gross weight is 0.25%,
Aluminium powder cream hydration reaction generates bubble, forms the slurries of expansion, reduces the density of slurries, and activated silica, aluminium and G oil-well cements occur
Reaction generation hydrated calcium silicate gel shape material and other gels, the basal body structure hole of cement mortar diminish, and slurries pass through liquid pump
Suction, sprays the outer surface to high speed revolving drum, and producing centrifugal force in outer surface of cylinder sheds slurries, and rotation is shed in realization
Stirring.
3rd step, testing performance index：
A, the density measurement of dilatant slurry：Take second step to prepare slurries, pour into and density is weighed in fluid densitometer, dilatant slurry
Density is in 0.85g/cm3Between, the density of this slurries is extremely-low density, and the compression strength of test block is big, using modified ceramics
Material, the resistance to compression of raising zircon English closed pore hollow ceramic microspheres, anti-folding, anti-erosion, anti-aging property.
B, the measure of dilatant slurry acid-base value：Take second step to prepare slurries, pour into pH value tester, show pH value, it is swollen
The pH value of swollen slurries is 9.5.
C, the uniformity test of slurries：Take second step to prepare dilatant slurry and pour into settlement barrel, 0.5 it is small when after observe it is homogeneous
Property, stability, homogeneity is that the hollow zircon English ceramic fine bead of closed pore is mutually merged with slurries, and stability is no longer to float ripple up and down
Dynamic, microballon is evenly distributed in the slurries of expansion.
D, the pressure testing of test block：Second step is prepared into slurries, the slurries being stirred pour into one group of two pieces of length and widths, high scores
Not Wei in 53mm*53mm*53mm die trials, conserved respectively in the water-bath curing box of 52 DEG C of constant temperature 24 it is small when, 48 it is small when, it is 96 small
When, when immersion 1 is small in cold water after the demoulding, the test block after solidification is put on forcing press and carries out resistance to compression, flexural strength is tested.
E, anti-gas-leak performance test：The dilatant slurry that second step makes is taken to pour into gas leakage analogue experiment installation, gas leakage mould
Draft experiment device includes stent 1, the oblique angle regulator 2 of remote control electric digital display, central tube 7, outer tube 6, pressurization hole 10, pressure measurement
Hole 9, top cover labyrinth 8, lower sealing cover 3, filter screen 5, wherein, central tube 7 runs through outer tube 6, and central tube 7 can be replaced, central tube 7 with
Annular space is formed between outer tube 6, wherein, other components are installed on stent 1, and remote control electric digital display inclines for the slurries injection of expansion
Rake angle adjuster 2 makes 1 angle of inclination of stent, and for 10 °, 30 centimetres of the gap of central tube 7 and outer tube 6, measurement angle coagulates slurries
Solid influence, dehydration is dropped and influence of the quantity to gas leakage, the density of slurries is in 0.85g/cm3Influence to gas leakage, because of test block
Gap and crack cause drop dehydration it is excessive, slurries weightlessness causes compression strength to decline, and pressure is directly proportional to depth, with compression pump 11
Pressurize from pressurization hole 10, be pressurized to 250MPa, digital pressure sensor 12, the slurries static pressure of measurement annular space expansion, filter screen 5
The quantity of leak-off hole metering drop dehydration is equipped with, the drop dehydration in 18mL/30min, unit interval of the drop fluid loss in beaker 4 is expired
Sufficient cementing requirements, single-factor measure the influence of density, inclination angle, pressure to drop dehydration, multiple-factor density, inclination angle, pressure respectively
Influence of the power measurement in a closed series to drop dehydration, how much directly related with gas leakage drop dehydration is, and the density for test block of cementing the well is bigger, unit area
Pressure is bigger, and with well cementation depth down, base pressure is bigger, collapses, micro- using modified sial closed pore hollow ceramic
Pearl, the slurries of expansion, reduce the density of slurries, reduce the pressure in shaft bottom, spawn, cement are generated in hydration process
The basal body structure hole of slurry diminishes, and forms high vapour lock well cementation test block, improves the flow of pore resistance of well cementation test block, reduces solid
The permeability of well test block, improves the flow of pore resistance of well cementation test block.
Claims (1)
1. zircon English ceramic fine bead prepares the performance test of oil well anti-gas-leak well cementation test block, it is characterised in that：Comprise the following steps：
The first step, the dispensing of anti-gas-leak well cementation test block：By G grades of 40~50 wt% of oil-well cement, 10~15 wt% of superfine cement, grain
Hollow 25~35 wt% of zircon English ceramic fine bead of closed pore, 5~7 wt% of flyash, pure of loss on ignition 1.1% that footpath is 50~300 μm
99.9% calcium oxide, 1.5~2 wt%, sodium sulphate 0.5~1.0 wt% and 1~5wt% of silica flour sampling are spent, obtains mixture, above group
The sum of percentage by weight divided is 100%；
The preparation of second step, anti-gas-leak well cementation test block dilatant slurry：Mixing is mixed to get by the percentage by weight sampling of the first step
Material, mixture is stirred evenly, is sized mixing with 0.5~0.7 ratio of mud, wherein ash is mixture, adds mixture gross weight
For 0.2~0.5% aluminium foaming agent, aluminium foaming agent hydration reaction generates bubble, forms the slurries of expansion, reduces the density of slurries,
Activated silica, aluminium and G a grade oil-well cement, which react, generates hydrated calcium silicate gel shape material and other gels, adds cement mortar
The flow resistance of liquid air gap and the pressure in gap, reduce the gap of particle in well cementation test block, improve the structure of slurries, reduce solid
The permeability of well test block, improves the compactness and compression strength of well cementation test block, and slurries are aspirated by liquid pump, sprays to rotation at a high speed
Walk around the outer surface of cylinder, produce centrifugal force in outer surface of cylinder and shed slurries, Stirring is shed in realization；
3rd step, anti-gas-leak performance test：The dilatant slurry that second step makes is taken to pour into gas leakage analogue experiment installation, gas leakage mould
Draft experiment device includes stent（1）, remote control electric digital display oblique angle regulator（2）, central tube（7）, outer tube（6）, pressurization
Hole（10）, pressure tap（9）, top cover labyrinth（8）, lower sealing cover（3）, filter screen（5）, wherein central tube（7）Through outer tube（6）,
Central tube（7）Diameter has plurality of specifications, central tube（7）With outer tube（6）Between form annular space, by the injection of the slurries of expansion wherein,
Other components are installed on stent（1）On, switch board is equipped with keyboard, changes the corner of servomotor by input parameter, into
And change stent（1）Angle of inclination, test bracket（1）Influence of the different angles of inclination to gas leakage, central tube（7）With outer tube
（6）Influence of the gap to grout cures time and gas leakage, influence of the quantity of dehydration to gas leakage, the density of slurries are dropped to gas leakage
Influence, influence of the slurries weightlessness to gas leakage, uses compression pump（11）From pressurization hole（10）Pressurization, pressure tap（9）Access numeral pressure
Force snesor（12）, the slurries static pressure that annular space expands is measured, simulates the pressure value of different depth, filter screen（5）It is equipped with filter
The quantity of hole metering drop dehydration is lost, drop dehydration enters beaker（4）In, single-factor measures density, inclination angle, pressure to drop mistake respectively
The influence of water, multiple-factor density, inclination angle, force combination measurement to drop dehydration influence, drop dehydration how much with the direct phase of gas leakage
Close, note down measured value, the density for test block of cementing the well is bigger, and compressive load per unit area is bigger, with well cementation depth down, base pressure
It is bigger, collapse, using the modified hollow zircon English ceramic fine bead of closed pore, the slurries of expansion, reduce the density of slurries, reduce
The pressure in shaft bottom, generates spawn, the basal body structure hole of cement mortar diminishes, and forms high vapour lock and consolidates in hydration process
Well test block, reduces the permeability of well cementation test block, improves the flow of pore resistance of well cementation test block.
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|---|---|---|---|---|
| CN113213785A (en) * | 2021-06-04 | 2021-08-06 | 嘉华特种水泥股份有限公司 | High-strength low-hydration-heat well cementing cement and preparation method thereof |
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Application publication date: 20180508 |