دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the theory that the earths landforms assumed their present configuration in a brief episode at the beginning of geologic history-possibly in a single great catastrophic event-and have remained relatively unchanged since that time. Compare uniformtarianism. catcher n: a device fitted into a junk basket that retains the junk picked up by the basket catch samples v: to obtain cuttings for geological information as formations are penetrated by the bit The samples are obtained from drilling fluid as it emerges from the wellbore or, in cable-tool drilling, from the bailer. Cuttings are carefully washed until they are free of foreign matter, dried, and labelled to indicate the depth at which they were obtained.

n: Obtaining of samples by the drilling crew from the drilling fluid as it emerges from the wellbore. Cuttings so obtained should be carefully washed until free of foreign matter, dried and accurately labelled with the depth at which they were drilled for ev