In this research, the influencing factors of oil well cement on the rheological property were experimentally studied. Based on the experiments and surveys of other class G oil well cement plants, the main influencing factors in the routine inspection were sample storage and processing condition and inspection equipment accuracy. The experimental results illustrate that sample storage and processing condition had a highly effect on the rheological property of drilling cement slurry. In addition, temperature positive deviation increased the rate of cement hydration by causing more rapid nucleation of hydration products, leading to earlier thickening time; conversely, minus deviation delayed cement nucleation, causing later thickening time. Compared with temperature deviation, the effect of pressure deviation was not obvious.
A broad experimental study had been carried out to characterize the effects of personnel operation and apparatus on cement strength test in this paper. The experimental results illustrated that wipe method of bowl influenced cement strength test result through changing water to cement ratio. In addition, cement strength results compacted by vibrating table were lower than that compacted by jolting apparatus. Also, it found that the installation way of jolting apparatus and the conditions of clamps had a significant effect on cement strength test result. Moreover, the use of ejector would reduce specimens’ damage in the demolding process, which ensured cement strength test accuracy.
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