Drill Bit For Its Different Types And Uses
Twist drill: drill bit is the most widely used hole processing tool, mainly composed of a working part and a shank. The working part has two spiral grooves, shaped like a twist. It is often used to drill holes in materials such as wood, plastic, and aluminum alloy.
Flat drill: The cutting part of the flat drill is shovel-shaped, with a simple structure and low manufacturing cost. The cutting fluid can be easily introduced into the hole, but the cutting and chip removal performance is poor. There are two types of flat drills: integral and assembled. The integral type is mainly used for drilling micro holes with smaller diameters, while the assembled flat drill has replaceable blades and uses internal cooling, which is mainly used for drilling holes with larger diameters.
Deep hole drill: Deep hole drills usually refer to tools for processing holes with a ratio of hole depth to hole diameter greater than 6. Commonly used ones include gun drills, BTA deep hole drills, jet drills, DF deep hole drills, etc. They are mainly used for holes that require deep processing.
Reaming drill: The reaming drill has 3 to 4 teeth, and its rigidity is better than that of the twist drill. It is mainly used to enlarge existing holes and improve processing accuracy and finish.
Countersink: Countersinks have more teeth and use forming methods to process the hole end into the desired shape. They are mainly used to process the countersink holes of various countersunk screws or flatten the outer end faces of holes.
In the oil and gas exploration and development industry, the types and selection of drill bits are more complicated, including diamond drill bits, roller drill bits and PDC drill bits. These drill bits have their own characteristics and advantages according to the nature of the formation rock and the drilling requirements.
Diamond drill bit: Its cutting edge is made of natural diamond and is suitable for hard formations. However, diamond drill bits are afraid of high temperatures, so pay special attention to cooling the drill bit when using it.
Roller drill bit: This is the most widely used drill bit at present. It is suitable for various formations, especially unconsolidated soft formations.
PDC drill bit: Its cutting edge uses artificial diamond and sintered tungsten carbide, which has better strength performance than scraper drill bits. It is suitable for relatively soft formations that are not easy to form mud bags, or medium-hard, non-abrasive formations.
In addition, there are some drill bits for specific purposes, such as impact drill bits, four-hole electric hammer drill bits, glass drill bits, tile hole openers, thin plate hole openers and woodworking hole openers, etc. They are used for drilling or opening holes in different materials such as masonry, concrete, glass, tiles, plastics, iron plates, aluminum alloy plates and wooden boards.
In general, there are many types and uses of drill bit. Choosing a suitable drill bit is of great significance in improving drilling efficiency, reducing drilling costs and ensuring drilling quality. When choosing a drill bit, factors such as the nature of the formation rock, drilling requirements, drilling depth and hole size need to be considered.