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硬質合金鑽进能获得比鑽粒鑽进較优越的效果,因而在鑽进过程中就需要根据岩石由軟而硬,由硬而軟地不断变化,选择适宜类型的鑽头。当前在合金、鑽粒互換方法上,还沒有統一的方法和一套完整的經驗。就106勘探队來詼,有三种不同的互換法。第一种互換方法:鑽粒鑽头更換合金鑽头,首先要将井內残存的鑽粒处理干净,然后再降下合金鑽头鑽进。采取的处理方法:一个是特地降下取粉管捞取;另一个是降下短粗径,长取粉管,使用鑽粒鑽头鑽进磨耗消灭,鑽进終了送大水量排冲,使破碎的鑽粒被排入取粉管內
Carbide drilling can get better results than drilling. Therefore, it is necessary to select a suitable type of drill bit according to the fact that the rock changes from soft to hard and from hard to soft during drilling. At present, there is no unified method and a complete set of experience in the alloy and drill-grain exchange methods. Humorous about 106 exploration teams, there are three different methods of exchange. The first exchange method: Drill bit replacement alloy drill, the first drill to keep the residual drilling well, and then lower the alloy drill bit. Take the approach: one is specifically to get down to take the powder tube fishing; the other is to lower the short diameter, take a long powder tube, the use of drill bit drill wear and tear to eliminate, drilling to send large amounts of water row to make the broken drill The grains are discharged into the take-up tube