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美国Deep Rock公司生产一种带轮轻便钻机(见图)。这种钻机适用于在土壤层打孔,配有100、150和200 mm的麻花钻头。该钻机的特点是:配有250 mm直径的胶轮,在野外搬运方便;又因钻机装在两根导向支杆上和采用手摇加压给进,操作比较简单和省力,且工作效率高。没有支架的轻便钻机虽然重量较轻,但操作比较困难,劳动强度大(见图右下角)。这里介绍的这种轻便钻机可用于径迹测量、射气测量和浅孔γ测量等工作,也可用于土壤层取样。该钻机的价格较便宜,主机加配套钻头共
US Deep Rock company to produce a portable light rig (see photo). This rig is suitable for drilling holes in soil layers with twist drills of 100, 150 and 200 mm. The drill is characterized by: with 250 mm diameter rubber wheels, easy handling in the field; and because the drilling rig mounted on the two guide strut and use hand-cranked pressure to feed, the operation is relatively simple and labor-saving, and high work efficiency . Lightweight rigs without brackets, although lighter, are more difficult and labor-intensive (see the lower right corner of the figure). The portable rig described here can be used for track measurement, gas measurement and shallow hole γ measurement work, can also be used for sampling soil layer. The price of the drill is cheaper, the host plus a total of drill bit