SY/T 5559-1992 General test methods for treatment agents for drilling fluids
Some standard content:
SY/T5559-92, Petroleum and Natural Gas Industry Standard of the People's Republic of China
General Test Methods for Treatment Agents for Drilling Fluids
Published on February 22, 1993
Ministry of Energy of the People's Republic of China
Implementation on August 1, 1993
1 Subject Content and Scope of Application
General Test Methods for Treatment Agents for Drilling Fluids, Petroleum and Natural Gas Industry Standard of the People's Republic of China
SY/T 5559-92
This standard specifies the determination steps of the physical and chemical properties of treatment agents for drilling fluids: volatile matter, water-insoluble matter, acid-insoluble matter, force II value, fineness, density and viscosity effect.
Different treatment agents for drilling fluids can be selected according to product needs. 2 Determination of Volatile Matter
Volatile matter is the percentage of the drying loss of the sample after drying for a certain period of time at 105°C, also known as moisture, humidity or drying loss.
2.1 Instruments and equipment
a. Balance, sensitivity 0.0001g
b. Electric thermostat: temperature control sensitivity ±2'C! c. Weighing bottle: 60×30mm2
d. Dryer: 200nm, silica gel desiccant, e. Watch glass: 140mr.
2.2 Determination steps
2.2.1 Place two clean weighing bottles on the clean watch glass 1: (the weighing bottle caps are also placed on the watch glass), send them into the thermostat, heat to 105\C and record the time, and control the temperature to 105±3°℃ and dry for 2h. 2.2.2 Take out the watch glass and the weighing bottle, put them in the desiccator, cool for 30min, cover the weighing bottle caps on the weighing bottle, and put them on the balance 1 to weigh (accurate to 0.0001g). Take the weighed weighing bottle from the upper half plate, open it, put 21.0.5g of the sample in with a key, cover the bottle cap, and weigh again (accurate to 0.0001g). 2.2.3 Place the two weighing bottles containing the sample on the surface (the weighing bottle caps are also placed on the surface), send them into the constant temperature box, and dry them at 105-3℃ for 4 hours.
2.2.4 Basis for determining A: At the same time, take out 14 weighing bottles and operate according to steps 2.2.1 to 2.2.3. Starting from 1.0h, take out a group (2) of weighing bottles, and then take out a group every 0.5h. According to m1-m2 in (1), calculate the drying loss at different drying times. Take the drying loss as the ordinate and the time as the abscissa, and find the inflection point of the curve on the grid coordinate paper, which is A. 2.2.5 Take out the surface blood together with the weighing bottle, put them into a desiccator, cool for 30 minutes, cover the weighing bottle cap on the weighing bottle, put it in the air and weigh it (accurate to 0.0001g).
2.3 Calculate
V= mi=mz- ×100.
m1—n20
Where: V-volatile content, %,
-Weighing bottle and sample mass, g:
Weighing bottle and sample mass after desiccating, #
-Weighing bottle mass, g.
Ministry of Energy of the People's Republic of China 1993-02-22 Standard (1)
1993-08-01 Implementation
2.4 Precision
SY/T 5559--92
When the difference between the results of two measurements is within 0.5%, take the arithmetic mean. 3 Determination of water-insoluble matter
Dissolve the sample in water to separate the insoluble matter from the solution. After drying, weigh the insoluble matter. The percentage of the insoluble matter in the sample mass is the water-insoluble matter.
3.1 Extraction method
Instruments and equipment
a. Balance, with a sensitivity of 0.0001g
b. Electric thermostatic box: temperature control sensitivity ±2'℃3C. Crucible filter: F3--3
d. Vacuum filtration.
3.1.2 Determination steps
3.1.2.1 Place the cleaned filter on the clean surface of the filter, put it into a constant temperature box, dry it at 105+3℃ for 2h, take it out and put it into a desiccator, cool it for 30min and weigh it (weigh to 0.0001g). 3.1.2.2 Weigh 2~3g of the test sample (weigh to 0.0001g) into a beaker, add 100mL of 50~60℃ steamed water, stir it, transfer the clear liquid into the crucible filter by pouring, and then wash the insoluble matter twice with 50~60℃ hot water, 50mL of water each time, and finally use a washing bottle to transfer all the insoluble residues from the beaker into the filter for suction filtration. 3.1.2.3 Place the filter on the surface IIIF, send it into a constant temperature box, dry it at 105 ± 3℃ for 2h, take it out and put it into the lower desiccator to cool for 30min, and weigh it (weigh to 0.0001).
3.1.3 Calculate
m-mox100
where, ——water insoluble matter, %,
-mass of plug filter and residue, 53
mo—-mass of crucible filter,
-mass of sample, g.
3.1.4 Precision
When the difference between two almost measured results is within 0.3%, take their arithmetic mean. 3.2 Centrifugation method
3.2.1 Apparatus and equipment
a: 100 g, sensitive plate 0.0001 g, maximum load 200 gb. Electric thermostatic box: temperature control sensitivity +2°C, c. Centrifuge: speed range 0~4000 r/mind. Centrifuge test tube.
3.2.2 Determination steps
3.2.2.1 Weigh 1 g of the sample (weighed to 0.0001 g) in a 200 ml beaker, add 100 mL of hot distilled water and stir to dissolve. (2)
3.2.2.2 Transfer the above solution into 4 or 6 centrifuge test tubes (the amount transferred to each test tube should be basically the same) that have been dried at 105-3°C and weighed to a constant weight, and centrifuge at 3000 r/min for 15 min. 3.2.2.3 Take out the centrifuge test tube, carefully aspirate the upper clear liquid, transfer the test solution in 3.2.2.1 into the centrifuge test tube, wash the residue in the beaker twice with 50mL hot water, transfer the washing liquid into the centrifuge test tube, and centrifuge at 3000r/min for 15min. Repeat this process until all the residue is transferred into the centrifuge test tube.
3.2.2.4 Finally, after aspirating the upper clear liquid of the centrifuge test tube, tilt the centrifuge test tube upside down and place it in a 100mL beaker with constant weight, dry it in a constant temperature box at 1052
SY/T5559—92
+3C for Ah, take it out (the A value is determined according to the actual situation of the product according to 2.2.4) and put it in a dryer to cool for 30min before weighing (accurate to 0.0001g).
3.2.3 Calculate
ml-moX100.
Where: ru2——water insoluble matter, %,
centrifuge tube, beaker and residual mass, 9
-centrifuge tube and beaker mass, g
sample mass, mol.
3.2.4 Precision
When the difference between the results of two parallel determinations is within 0.5%, take the technical average. 3.3 Filtration method
Instruments and equipment
a. Balance, with a sensitivity of 0.0001gs
b. Electric thermostatic box: control sensitivity up to 2℃. Glass funnel,
d: Filter paper: weigh 11cm, qualitative fast, medium and slow speeds e. Weighing bottle: Φ70×30mm.
3.3.2 Determination steps
3.3.2.1 Weigh 2~3g of the sample (weigh to 0.0001g) into a beaker, add 100mL of 50~60℃ distilled water, stir, transfer the clear liquid into a wetted funnel covered with qualitative filter paper by decanting method, and filter. Then wash the insoluble matter twice with 50~～60℃ hot distilled water, 50mL each time, and finally transfer all the insoluble residue from the beaker into the funnel with a washing bottle. 3.3.2.2 Transfer the filtered filter paper and the residue into a weighing bottle, send it into a thermostat, and dry it at 105±3℃ for 21. Take it out and put it in a dehumidifier to cool for 30min, and weigh it (weigh to 0.0001g). 3.3.3 Calculation
wg= m1 mo. ×100.
- Water insoluble matter, %:
Wherein
filter paper and residue mass, g
mo——filter paper mass, g
sample mass, g.
3.3.4 Precision waste
When the difference between two parallel determination results is within the range of 0.7%, take the total arithmetic mean. The fast, medium and slow speeds of the filter paper are determined according to the size of the residue and the nature of the product. The steps for determining the quality of the filter paper are as follows: randomly select 5 sheets from a box of filter paper at a specified speed, wet them with water, put them in a weighing bottle, send them into a constant temperature box, dry them at 105±8℃ for 21, take them out and put them in a dryer to cool for 30min (weigh to 0.0001g), take the average value of 5 sheets as the mass of the filter paper. 3.4 Filter paper method
Instruments and equipment
a. Temperature sensor, sensitivity is 0.0001g
b. Electric thermostat, temperature control sensitive 2℃sc, warm water bath:
d. Electric furnace: 100DW, adjustable.
3.4.2 Determination steps
SY/T 555992
3.4.2.1 Weigh 2+0.1g of sample (accurate to 0.0001g), put it into a 100nL beaker of known mass, add 80mL of boiling water, stir for 2min, let it stand for 5min, pour out the upper clear liquid, keep some solution to prevent the residue from pouring out, add 60mL of boiling water and stir for 2min, let it stand for 5min, pour out the upper full liquid, add 60mL of boiling water and stir, pour out after standing, repeat the operation until the total amount of water added is 500mL. 3.4.2.2 Cover the beaker with a water bath, evaporate the water in the residual water, wipe off the water outside the beaker, and then transfer it to a constant temperature box at 105+3℃ to dry for 2h, take it out and put it in a lower desiccator to cool for 30min and weigh it (accurate to 0.0001g). 3.4.3 Calculation
w=-.m1-mo ×100.
Wherein, w——water insoluble matter, %
beaker and residual mass,
mu——beaker mass, g=
m-—sample mass, g.
3.4.4 Precision
When the difference between two similar determination results is within 1%, the arithmetic mean shall be calculated. Determination of acid insoluble matter
Acid insoluble matter refers to the percentage of the residue of the sample after the reaction with acid under specified conditions to the sample mass. 4.1 Reagents and materials
a: Hydrochloric acid, chemically pure
b. Silver nitrate, chemically pure.
4.2 Instruments and equipment
a: Balance, sensitivity 0.0001g*
b, Constant overflow water bath
c. Electric thermostat, temperature control sensitivity ±2℃, d. Glass filter: F3-3
e, filtration device.
4.3 Determination steps
4.3.1 Weigh 1g of the sample (weighed to 0.0001g) that has been dried at 105±3℃ for 2h and cooled, place it in a 100mL beaker, add 50mL of 1+1 hydrochloric acid solution, stir with a glass rod, cover the surface, and place it in a constant temperature water bath at 50 (or 70)±2℃ to react for 90min. 4.3.2 Take out the sample beaker and filter it with a crucible filter of known mass. Use distilled water to transfer all the undissolved matter in the beaker into the filter. Continue to rinse the residue with distilled water until all chloride ions are eliminated (check with 1% silver nitrate solution). 4.3.3 Place the filter on surface III and place it in a constant temperature oven at 105 ± 3℃ to dry for 2 hours. Take it out and place it in a desiccator to cool for 30 minutes and then weigh it (weigh to 0.0001g).
4.4 Calculate
A--.m-- m2. ×100-.
Where: A—acid insoluble matter, %?
ml—mass of crucible filter and residue,!
mo—mass of filter, g!
n—mass of sample, g.
4.5 Precision
When the difference between the results of two parallel determinations is within 0.5%, take the common arithmetic mean. 4
5 Determination of pH value
SY/T5559-92
pH value refers to the pII value displayed by a 1% (m/V) aqueous solution of the treatment agent. 5.1 Acidity meter method
5.1.1 Reagents and materials
a. Distilled water,
b. pH standard solution: potassium dihydrogen phosphate-sodium dihydrogen phosphate with a pH value of 6.865 and borax standard solution with a pH value of 9.180. 5.1.2 Apparatus and equipment
a. Acidity meter, precision 0.01 pH unit, equipped with saturated calomel electrode and glass electrode b. Electromagnetic stirrer: with heating device.
5.1.3 Determination steps
5.1.3.1 Preparation of sample solution: Weigh 1g of sample (accurate to 0.01g) and put it into a 150mL beaker. Use a measuring cylinder to take 100mL of distilled water [If the sample mass is not 1.00g, adjust the solution concentration to 1% (m/V) by using a constant volume. Add it to the beaker and stir on a magnetic stirrer until it dissolves.
5.1.3.2 Calibration of pH meter
Follow the instrument instructions.
5.1.3.3 Measurement of pH value
Place the test solution on a magnetic stirrer and adjust the test solution temperature to 2 5-1℃, adjust the temperature compensation knob of the acidometer to 25℃, insert the electrode, stir for 2 minutes and then stop stirring. Read the value after the pointer of the acidometer is stable for 1 minute. Repeat the measurement twice and the difference is within 0.1pH unit as the measured value.
5.1.4 Precision
When the difference between the results of two parallel measurements is within the range of 0.2pH unit, take the arithmetic mean. 5.2 Test paper method
5.2.1 Reagents and materials
Precision pH test paper; the color scale interval is 0.2pH unit. 5.2.2 Determination steps
Weigh 1g of sample (weighed to 0.01g) is placed in a 150mL beaker. Use a measuring cylinder to take 100mL of distilled water [if the sample mass is not 1.00g, the solution concentration can be adjusted to % (m/V) by water. Add it to the beaker and stir with a glass rod until dissolved. After standing for 5min, dip the test paper into the test solution and take it out after 0.5s. Compare it with the color plate to get the pl value. 5.2.3 Precision
When the difference between the results of two parallel determinations is within the range of 0.2T units, take the lower arithmetic mean. 6 Determination of precision
The sieve residue of the sample passing through the standard sieve with an aperture of X1m accounts for the sample 6.1 Niu sievewwW.bzxz.Net
6.1.1 Instruments and equipment
a. Tianhu: Sensitivity is 0.01g
b. Standard sieve,
c. Oscillator.
6.1.2 Determination steps
Weigh 10g of the sample (accurate to 0.01g), put it into the standard push sieve with a pore size of Xmm on the oscillator (the sieve pore size can be determined according to the product regulations) and oscillate at medium speed for 10min. Transfer the sieve residue into a known mass device and weigh it (accurate to 0.01g). 6.1.3 Calculation
SY/T 5559--92
Sx= m1mo×100
Wherein: Sx——the sieve residue of the standard sieve with aperture Ymm, %m.
——the sieve residue and the mass of the instrument, g!
m——the maximum mass of the sample.
6.1.4 Precision
When the error between the results of two parallel determinations is within 0.5%, take the arithmetic mean. 6.2 Wet sieving
6.2.1 Reagents Materials and Equipment
Sodium polyphosphate: chemically pure.
6.2.2 Instruments and Equipment
a. Wet sieve: sensitivity 0.01g
b. Wet sieve, pressure gauge and pressure regulator: c. Standard sieve: diameter 7.6cm, height 6.3cm d. Electric thermostat, temperature control sensitivity up to 2℃, e: Constant temperature water solution:
f. Evaporating blood: glass, bottom, volume 50 or 100mL. 6.2.3 Determination steps
6.2.3.1 Weigh 10% (accurate to 0.01g) of the sample that has been dried at 10513 for 21 seconds and cooled: add it to a beaker containing 0.1g sodium polyphosphate and 350mL distilled water, stir for 5min, then transfer the suspension into a wet sieve with a pore size of Xmm, and rinse the residue on the beaker wall with a washing bottle into the visible sieve.
6.2.3.2 Rinse the sample on the wet screen surface with water at a gauge pressure of 0.7MPa from the nozzle of the wet screen for 2 minutes. When washing, the elbow of the nozzle should be close to the screen frame, tilted toward the screen surface, and moved back and forth on the screen surface (for non-rotating wet screens, the nozzle should be rotated). 6.2.3.3 Rinse the sieve residue on the screen to one side of the screen with deionized water and transfer it to an evaporator III of known mass (accurate to 0.01g). After steaming the sieve residue over boiling water, wipe off the moisture on the outer wall of the evaporator III, and then transfer it to a constant temperature box at 105±3℃ to dry for 2h. Take out the evaporator III, put it in a dryer, cool it for 30min, and weigh it (accurate to 0.01g). 6.2.4 Calculation
Sx=-m=mo ×100.
Where: SXmm aperture standard sieve residue, %, m1—mass of sieve residue, :
ma-—mass of evaporation, gs
m——mass of test sample, 6.2.5 Precision
When the difference between two parallel determination results is within 0.5, take the arithmetic mean. 7 Determination of density
7.1 Lee density bottle method
7.1.1. Reagents and materials
a. Anhydrous calcium chloride: chemical
b. Anhydrous kerosene: add 40g anhydrous calcium oxide to 1000g commercial kerosene, shake for 5min and then release for 24h, take the upper clear liquid (filter if necessary) for later use;
c. Filter paper.
Instruments and equipment
SY/T 5559-92
day, sensitivity 0.01gl
b. Super constant temperature water bath: temperature control sensitivity ±0.05℃sc, electric constant temperature box: temperature control sensitivity 2℃d. Ben's density bottle: graduation value is o.lml, volume 250mL, height 250mm. 7.1.3 Determination steps 1.3.1 Use a long-necked funnel to add anhydrous kerosene to a dry, clean density bottle until the neck is about 1 cm below the zero mark. Then use filter paper to wipe off the kerosene splashed on the upper part of the neck. Cover the bottle with a stopper and place it in a super thermostat so that the neck mark is below the water surface. Adjust the temperature of the thermostat to make it about 10°C higher than room temperature. However, the temperature change should be strictly controlled within ±0.05°C. After keeping the temperature for 30 minutes, read the volume of kerosene in the bottle in the thermostat (if the reading value is taken, it should be read within 5). This reading (accurate to 0.03mL) is the initial volume of the kerosene.
7.1.3.2 Use a clean and dry beaker to weigh 1m (g) of the sample that has been dried at 105±3℃ for 2h and cooled (accurate to 0.01g), add it to the density bottle through a dry short-necked funnel, cover the bottle with a stopper, roll or shake the density bottle for 15min (use an ultrasonic vibrator to exhaust for 30min when the density is less than 3.0g/cm), send it to a thermostat, and keep overflowing for 30min. 7.1.3.3 Take out the density bottle, roll or operate the density bottle for 15min again to eliminate the remaining air (or use an ultrasonic vibrator to exhaust for 30min), then send it to a thermostat, and keep overflowing for 30min. Read the final volume using the method of reading the initial volume of coal. 7.1.4 Calculate
Wu, p--density, g/cm*,
a sample mass suspension,
V-the final volume reading of kerosene in the density bottle, mL/sV. ——The initial volume reading of kerosene in the density bottle, ml. 7.1.5 Precision
When the difference between the two parallel determination results is within 0.02/cm*, take the arithmetic mean. Note: The sample mass is weighed according to m-20× specified density (g). 7.2 Gann density bottle method
7.2.1 Instruments and equipment
a. Balance: sensitivity 0.001g, load up to 200g! b. Super constant temperature water bath: temperature control sensitivity 0.1C3c: Density bottle, 50ml
d. Vacuum dryer 3
e. Vacuum pump: air flow rate 0.001m3/s, ultimate vacuum 6.66×10-2Pa(9)
7.2.2 Determination of liquid sample
7.2.2.1 Take an empty density bottle of known mass (accurate to 0.001g) that is clean, dry, and filled with distillation, plug the bottle stopper, and place it in a super thermostat with a room temperature of about 10℃ (the water should cover the neck of the density bottle), control the temperature change within the range of 0.1℃ and keep it constant for 30min, take out the density bottle from the thermostat, wipe the outside, keep it at a low temperature for 10min, and then weigh it (accurate to 0.001g). 7.2.2.2 Wash the above density bottle, and after concentrating, fill it with the liquid sample to be tested, plug the bottle, and then put it in the super thermostat, keep the temperature constant for 30 minutes, take out the density bottle, wipe the outside dry, leave it at room temperature for 10 minutes, and weigh it (accurate to 0.001g). 7.2.2.3 Calculate
e=m2moxp
where: a——density, g/cm
-mass of density bottle, g,
m1——mass of sample and density bottle, g
-mass of water and density bottle,
density of water at constant temperature, g/cm2.
7.2.3 Determination steps for solid samples
$Y/T 5559—92
7.2.3.1 Take an empty density bottle that has been cleaned, dried, and has a known mass (weighed to 0.001g), fill it with anhydrous kerosene (or other liquids that can act on different samples), plug the bottle, and put it in a super thermostat that is about 10℃ higher than room temperature (water should be submerged to the neck of the density bottle), and control the temperature change within the range of ±0.1℃ for 30min. Take out the density bottle from the thermostat, wipe the outside, and weigh it after 10min (weighed to 0.001g)
7.2.3.2 Pour out the kerosene in the bottle, wash it, dry it, and then put in 1/31/2 volume of the sample (which has been dried and cooled at 105±3℃), plug the bottle, weigh it (weighed to 0.001g), remove the bottle stopper, and add anhydrous kerosene to 1cm above the surface of the sample. Place the density bottle in a vacuum dryer and connect it to a vacuum pump for suction. When all the mixed air is removed and no bubbles appear, connect the vacuum dryer to the atmosphere, turn off the vacuum pump, take out the density bottle, add clear water-kerosene to the neck, wait for the upper part to be clarified, then continue to fill it with clear water-kerosene, cool the bottle stopper, and place it in a super thermostat for 30 minutes. Take out the density bottle, wipe the outside, and weigh it at room temperature for 10 minutes (accurate to 0.001g). 7.2.3,3 Calculate
Where:
density of solid sample, g/cm
(m2-mo2,@1
(mi-m)-(m-m2)
mass of density bottle containing sample,
mass of empty density bottle, SI
mass of density bottle filled with anhydrous kerosene,
mass of density bottle filled with anhydrous kerosene containing sample, g-density of anhydrous kerosene at constant temperature (which can be measured by method 7.2.2), g/cm. 7.2.4
Precision
When the difference between two parallel measurement results is within 0.02g/cm\, take the arithmetic mean. 7.2.5 Water is not Density at the same temperature
The density of water at different temperatures is shown in Table 1.
Table 1 Density of water at different temperatures
Temperature, \C
Density width.g/cn
Temperature decay c
Density.g/cms
Density.g/emm
Temperature.℃
Density-g/cm
Temperature.'℃
Density·g/cm
了.3 Densitometer method
了.3.1 Instruments and equipment
a. Densitometer: graduation value 0.0011
b. Glass tube: 60×300mm.
SY/T 5559—92
7.3.2 Determination steps
Pour the liquid sample to be measured slowly into the glass cylinder along the wall of the container, let it stand for 5 minutes, put the clean and dry density meter (do not take it directly with your hands) into it, and read the value after it stands still.
7.3.3 Precision
When the difference between the results of two parallel measurements is within the range of 0.03/cm\, it is close to the arithmetic mean. 8 Determination of viscosity effect
The viscosity effect refers to the value of the apparent viscosity of the distilled water suspension of the weighted material before and after adding calcium sulfate at a specified density. 8.1 Reagents and materials
Calcium sulfate Chemically pure.
8.2 Instruments and equipment
a. Balance sensitivity 0.01g3
b: Drilling liquid density 1.0~3.0g/cm*
c. Viscometer: Fann-35 or similar products d. Stirrer: 1400~2000r/mint
, drilling non-liquid curing.
8.3 The amount of weighting material required to prepare a certain volume and a certain density suspension can be calculated as follows: m=Vp(e,-e)
Pi—P2
The mass of weighting agent required, g!
Where: n—
V—the volume of distilled water used, ⅢL
P,—the density of the weighting agent used, g/cm
P2—the density of the prepared suspension, g/cm°Ps—the density of the distilled water used, g/cm\. (12)
8.4 Determination steps
.8.4.1 Add 250ml of distilled water to a 1L porcelain cup. While stirring with a stirrer, gradually add the sample (calculated according to formula (12), weighed to the nearest 0.01g) that has been dried at 105-3℃ for 2h and cooled, and stir for 15min after addition (stop at least twice during the stirring process to scrape off the sample adhering to the container wall and the stirring shaft blades). Pour all the stirred suspension into a liquid curing tank and leave it to stand in a sealed container for curing at room temperature for 24h. Prepare 4 portions of this suspension in total. 8.4.2 Take 2 portions of the total suspension after the sealed curing lip and stir with a stirrer for 15 minutes. Use a drill and liquid densitometer to measure the density of the suspension. When the measured density is 4±0.02g/cm3, (4 according to the type of weighting agent or to be determined.) Transfer the total suspension into the container of the direct reading viscometer, stir and measure the viscosity of the total suspension at a speed of 600r/min (since the suspension settles quickly, the maximum value before the reading value drops should be used as the measured value when measuring the viscosity). If the density of the suspension is less than P2-0.02g/cm3 or greater than P2+0.02g/m, find out the reason or re-prepare the suspension and measure it after stirring and curing.
.8.4.3 Take another 2 parts of the suspension, add 2.5g of calcium sulfate passed through a 0.175mm sieve, stir for 5min, place it in a sealed container at room temperature for 30min, and stir for another 15min (stop at least twice during the stirring process to scrape off the sample adhering to the wall of the instrument and the blades of the stirring shaft), transfer the suspension into the container of the direct reading viscometer, and measure the viscosity at a speed of 600r/min. 8.5 Calculation
Where: -AV—-apparent viscosity of suspension, mPa's ISY/T5559--92
Where 0—the reading of the viscometer at a speed of 600r/min. 8.6 Precision
When the difference between two similar measurement results is within 10mPa's, take the arithmetic mean. Additional remarks:
This standard was proposed and technically managed by the Drilling Fluid Subcommittee of the Petroleum Drilling Engineering Professional Standardization Committee. This standard was drafted by Chengde Petroleum Technical College. Who drafted this standard: Zhang Guozhao, Tan Boniu, Zheng Zhezhi, Li Guifang. 10
This standard remains valid after the review in 199, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.
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