What drill bit to use for sanding mudstone, and what is the best drill bit to use for cement

It is best to use PDC drill bits, and alloy drill bits can also be used.

PDC drill bit English: Polycrystalline Diamond Compact Bit, the abbreviation of polycrystalline diamond composite disc drill bit. It is a kind of drilling tool commonly used in the geological drilling industry.

PDC drill bit classification.

Classification according to drill body material.

Carcass PDC drill bits.

The carcass diamond composite sheet (PDC) drill bit is a kind of cutting drill bit that welds the diamond composite sheet to the drill bit carcass by brazing. The carcass drill bit is sintered with tungsten carbide powder, brazed on the tungsten carcass with artificial polycrystalline diamond composite sheet, and the diameter is maintained with natural diamond.

Steel type PDC drill bits.

The steel PDC drill bit is machined with nickel, chromium and molybdenum alloys. After heat treatment, a hole is drilled on the drill bit body, and the artificial polycrystalline diamond composite sheet is pressed into the drill bit body (tightly fitted), and the diameter is maintained with columnar tungsten carbide.

Classified according to applicable industries.

Composite disc drill bits for geological exploration.

It is mainly used for geological exploration and exploration of composite piece drill bits, suitable for soft to medium hard rock formations, and now some manufacturers have newly developed new composite pieces that can be applied to rock formations of grade 10 hardness.

Composite disc drill bits are used for coal drilling.

It is mainly used for coal seam drilling and excavation on coal mines. Generally speaking, the rock formation of the coalfield is relatively soft, and the composite piece drill bit is widely used, such as bolt drill bit, three-wing drill bit, etc.

Composite disc drill bits for oil exploration.

It is mainly used in oil and gas fields. At present, the composite piece drill bit for oilfield is the most expensive and demanding among all the composite piece bits. It can be said that it is the aristocracy in the composite film drill bit.

The best is to use PDC drill bits, PDC drill bits are faster than cone bits, safe and do not have to worry about losing the cone wheel, according to the hardness of sand and mudstone, you can choose different numbers of PDC drill bits, soft formations use 4 blades, hard formations use 5 blades or 6 blades. If you use a cone bit, you should also distinguish the degree of softness and hardness of the formation, the soft formation uses steel teeth, and the hard formation uses inlaid teeth.

Use alloy steel drill bits or similar rhinestone drill bits.

Alloy triangular drill bits, electric hammer drill bits, twist carbide impact drill bits. To use these drill bits, an electric hammer is used.

If you want to punch a hole from 40 mm to 200 mm, you need to use a rhinestone drill bit, which is the kind of hollow drill bit.