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史密斯钻具工业公司的大直径钻孔装置的钻杆,包括一组套装在中心管上经过加工的铸铁配重块。钻杆中心管的下端有一个带法兰的支座,上端有一个带螺纹的接头,钻头和导向器都装在带法兰的支座上,在配重块最上端的下面装有一个类似的导向器,其结构特点是能够更换钻杆上的任何一个配重块,也能在钻杆支承座的下面提供安装钻头的法兰。通过增加调整垫和更换轴承支座的方法,使导向器适用的孔径范围更宽。导向器本体具有五种不同的规格,适用于26″到188″的大孔径钻进。
The drill pipe for the large diameter drilling equipment at Smith & Bros. Industries consists of a set of cast iron counterweights assembled on a central tube. At the lower end of the drill pipe, the center pipe has a bearing with flange and a threaded joint at the upper end. Both the drill and the guide are mounted on the bearing with flange. Underneath the uppermost end of the counterweight is a similar The guide, which is structurally characterized by the ability to change any counterweight on the drill pipe, can also provide the flange on which the drill bit is mounted under the drill pipe support. By adding adjustment pad and bearing replacement method, make the guide for a wider range of aperture. The guide body comes in five different sizes and is suitable for large bore drilling from 26 “to 188”.