固井井下水力超聲與低頻脈動發(fā)生裝置研究
[Abstract]:Hydraulic ultrasonic and low frequency pulsation cementing technology is in the process of casing, ash injection, displacement and weathering, using fluid as power source, by installing under floating hoop, The hydraulic ultrasonic and low frequency pulsation generating device between casing and hoop to produce ultrasonic and low frequency pulsation wave, make it act on casing and annulus air cementing fluid, drilling fluid to improve cementing quality. In this paper, the commonly used Perman ultrasonic generator and downhole low frequency pulsation generator are taken as the research objects, and the effects of low frequency pulsation wave on suppressing annular air channeling, improving displacement efficiency and enhancing the strength of one or two cementing surface are analyzed. The effect of shortening the transition time of initial and final setting and the effects of ultrasonic chemistry, mechanics and thermal effect on the rheological properties of cement slurry and providing a better environment for hydration reaction of cement slurry during weathering. It provides a theoretical basis for the application of this cementing technology. By solving the harmonic frequency of Reed in cement slurry and the harmonic frequency of liquid sheet, the frequency range of acoustic wave is obtained. According to the calculation model of Urick-Lamb intensity attenuation, the absorption attenuation and scattering attenuation of sound wave and its influencing factors are analyzed, and the effective propagation distance of sound intensity is obtained. At the same time, the propagation law of low frequency pulsating wave in annular cement slurry is analyzed, and the wave equation of low frequency pulsating wave is solved by establishing a mechanical model. The effective propagation distance of low frequency pulsating wave is analyzed by amplitude change rate and its influencing factors, which provides feasibility and parameter optimization analysis for this cementing technology.
【學位授予單位】:西安石油大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TE256
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