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一、关于在六级带状灰岩中合金鑽头镶焊型式的选择问题根据不同的岩层情况,选择不同镶焊型式的合金钻头,是保证钻进效率的一个基本关键。我们在六级较碎的带状灰岩中,曾经对三种不同镶焊型式的合金钻头(普通合金金钻头,单、双粒直镶合金钻头,单、双粒斜镶合金钻头)进行了对比试验,现将试验情况和试验结果分述于后: (一)回次钻进效率 1.普通合金钻头:钻头直径为75公厘,共镶合金粒六块,内、外出刃各三个,合金出刃镶焊规格
First, on the six band-like limestone alloy drill welding choice of style According to different rock conditions, the choice of different welding type alloy drill bit is to ensure that the drilling efficiency of a basic key. Of the six shards of banded limestone, three different alloy-insert type drills (general alloy gold drill bits, single and double grain straight alloy drill bits, single and double grain oblique insert diamond bits) were used Comparative test, the test conditions and test results are described later: (A) back to the drilling efficiency 1. Ordinary alloy drill: drill diameter of 75 mm, a total of inlaid alloy particles six, the inner and outer edge of the three , Alloy blade edge welding specifications