英文篇名
DISCUSSION ON THE GEOLOGIC DRILLING METHODS USE IN UNCONSOLIDATED SEDIMENTS
作者
蘇泰維、賴典章
關鍵字
未固結地層、衝鑽、旋轉鑽探、鋼索式取岩心法
摘要
本文就未固結地層地質鑽探採樣方式,尤其是完整或連續地層的採樣,作一簡單的介紹,其主要方式有(一)衝鑽(二)傳統旋轉鑽探(三) 鋼索式取岩心法。衝鑽有其快速方便的優點,但卻不易取出岩心;傳統旋鑽雖取樣較為容易,但起鑽、下鑽較為費時;鋼索取岩心法雖不須起下鑽桿,但鑽探速度較慢為其缺點,如何選擇一種好的鑽探方式,地層的材料、工程的需要、以及鑽探的目的及深度,均為其考慮的因素。
英文摘要
In this paper we briefly review the way of drilling and sampling core in unconsolidated sediments, with emphasis on a complete recovery continuous core. The drilling methods are mainly classified as (1) the cable toll drilling , (2) the rotary drilling and (3) the wireline coring method. With regard to the cable toll drilling, the benefit of using it is speedy; however, it is difficult for this method to take the core out of smoothly, as loading and unloading of the drilling pipe is required. Unlike the rotary drilling , it is not necessary for the the wireline coring method to unloading the drilling pipe, yet the disadvantage of using this method is time consuming . Therefore , how to select a way to drill depends on the following factors: such as the physical properties of the strata, the need of the engineering ,the purpose and the depth of drilling.