and at 30 ℃, the thickening time of the cement slurry for long section is conditioned within 90~120 min and the cement slurry for short section within 50~60 min, and the filtrate volume below 50 mL.
Introducing 1.4% (BWOC) ZJ-2 into plain slurries of 3 commercial grad G oilwell cement leads to reduction in filtrate loss at 75℃ and 6.9 MPa from >1 000 mL to 20—30 mL and to strengthening of set cement and exerts little effect on their thickening time.
Applications of VII T601 in 220,320,460 and 680 industrial gear oils were described. The result showed that VII T601 possesses better thickening capacity and shear stability.
The operational principle of an automatic tester of bodying time of high temperature and high pressure cement slurry is intro-duced. The temperature control algorithm and the homogenizing and bumpless control technology of temperature adjustment by regulating power are emphasized.
The size of C 3S crystal in slaked material influences the bodying time greatly,so quick rotation of furnace and long flame burning are required to prevent slaked material from blocking, to gurantee the intensity of gusher cement, bodying time, and sulfate resistance.
This BP neural network had been used successfully to predict the viscosity (100t) of the diesel bodying oil and to optimize the formulation of lubricating oil, respectively.
The technology and results of cementing pay sections of one well by using a slurry with different setting time are presented in some detail: the slurry for upper section contains 1.2% ZJ-2, 0.4% USZ, and 0.3% XP-1 and thickens in 172 min at 65℃ and 35 MPa; the slurry for lower section contains 0.8% TW600S additionally and thickens in 82 min.
The grade G cement slurries with 1.4% ZJ-2, 0.3% XP-1, 0.3% USZ and proper amount of ZH-1 (a retarder) added for medium temperature use have good flowability, low and stable filtrate losses (50—75 mL) practically unchanged by changing temperature (60—79℃) and introducing retarder.
Histopathological examination indicated that the cusps became thickening with unequal size, irregular shape (coiling and prolapse edge), enhanced hardness, and partly calcification.
An approximate mathematical model of the generator dynamics which can explain the mechanism of formation of the experimentally obtained periodic transverse thickening structure is considered.
During a study of the bodying of soybean oil under oxidative conditions it was observed that an increased hydroxyl number was accompanied by an increased diene value.
Compared to varnishes derived from ordinary varnish resins, the epoxy resin-oil varnishes have faster bodying rate, higher viscosity, lighter color, and lower acid number.
These responses, which also served to stiffen the hand/arm system, were most pronounced during unexpected load changes, but they appeared too late to prevent slips.
In almost all cases, this value was as large or larger than that measured when the subject was asked to cocontract maximally to stiffen the wrist in the absence of any load.
A major by-product of these diagnostic studies is the possibility of de livering therapeutic agents to local areas.
例句来源
The merchant maybe one such monitor, de livering the goods if the payment was successful.
例句来源
1) Polyisobutene, the molecular weight of which is between 6568—20415, can be prepared by polymerizing isobutene with catalyst Alcl_3 at low temperature. 2) Preliminary analysis: The molecular weight, ash, ability to increase the viscosity and solubility of the product 1 and 2 are up to the standard. The ash, ability to increase the viscosity and solubility of the product 3 are also up to the standard. 3) The produced polyisobutene has no apparent influence on the Viscosity-temperature Constant of the Origi...
The type of Hei-Shan bentonite (Liaonin Province) was determined by the use of component analysis, thermal analysis and X-ray diffraction analysis. The results show that the bentonite is of calciumS type. By_treating with sodium chloride solution to convert the calcium bentonite into sodium bentonite, cation exchange with an aliphatic quarternary ammonium salt in aqueous solution was carried out. The quarternary amrhonium salt is triethyl hexadecyl ammonium chloride, which was prepared by first converting c...
A relatively complete laboratory examination of the properties of a complex calcium soap grease has been made. The complex calcium soap used as the grease thickener is composed of calcium stearate and calcium acetate, while a low pour point lubricating oil is used as base oil. It is found that the complex calcium soap gives strong thickening ability, and the greases thus made possess high drop points, good colloidal stabilities, small viscosity changes with temperature and fine lubricity. However, the age-h...
稠化
thickening
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