Visual borehole inspection by camera - is improved by adding flocculants to drilling fluid of downhole

摘要

When a down borehole has been completed by a wet drilling method, it is often sufficient to add a flocculant to the circulating water. Alternatively, the drilling fluid can be pumped out and replaced entirely by a fluid with an admixt. of flocculants. In both cases, the particles in suspension are deposited and the liq. is clarified. This saves time and labour in the visual inspection of down holes by cameras.