How do you select drill bits for different formations? For different types of drilling equipment, different drill bits are needed in production. When choosing a drill bit, you should pay attention to the following aspects:
Shallow interval and deep interval. In order to achieve economic benefits, a bit with a higher ROP should be used in shallow Wells, while a bit with a longer service life should be considered in deep Wells to reduce non-productive time such as tripping.
When operating in soft rock with good drillability, the drilling speed is faster, so it is necessary to choose the four-wing bit with large slag discharge and high slag discharge quality. When working in hard rock, the strength of the rock is greater, and each tooth and bit is required to bear a larger limit load, so it is necessary to select a bit with a higher strength body and tooth. In the rock drilling containing clay, clay is relatively loose, resulting in the slag hole often clogged phenomenon, you can choose the side slag drill; When drilling in the rock with good toughness, you can choose the wedged bit to ensure the safety of production.
