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A drag bit, Chevron Type Drag Bits, Step Type Drag Bits is a drill bit usually designed for use in soft formations such as sand, clay, or some soft rock. However, they will not work well in coarse gravel or hard rock formations. Uses include drilling water wells, mining, geothermal, environmental and exploration drilling.

The drag bits as called scraper bit is the earliest type of drill used in rotary drilling. The drag bits/scraper bit has a simple structure. On the oval cylindrical shell with internal threads, a lateral working blade is welded, and the blade is welded with a thin carbide cutting. Tools, to keep the alarm on the blade wing, the surface of the diameter of the work surface is welded with thin, cylindrical hard alloy cutting tools and surfacing welded granular hard alloy.

Oil drilling is a cutting bit with fins commonly used in the upper soft formation. There are two wings, three wings and four wings (scraper bits with up to a dozen wings have also appeared, such as LX10), the most commonly used is three-wing scraper bits. There are two types of stepped and non-stepped bottoms (divided into inner step, outer step, and flat bottom), and the blade is welded with carbide or diamond. According to the need, the scraper bit is divided into two types: coring and uncoring. Applicable stratum: extremely soft, soft, medium hard.