When it comes to rock drilling, there are many different types of bits available. These bits are made for drilling into almost any kind of rock. This article will cover the PDC bit, Roller-cone reamer, Tricone, and Concave hammer.
- PDC bit
The PDC bit is the next generation of rock drill bit technology. It has been used successfully in the oil field and has also become a preferred choice for many drillers in the HDD and water well industries. Its primary advantage is that it increases penetration rates by 50 to 250%, which translates into faster drilling projects and lower costs per hole.
The PDC bit uses a diamond-based cutter to drive rock. Its design has changed over the decades. During the past several years, its performance in hard rock has improved considerably. The new version is more wear-resistant and has a much higher impact strength than conventional bits. Its unique design also allows for multiple CDEs to be placed across the bit face for increased footage.
- Roller-cone reamer
A roller-cone reamer is a drill bit with a cone-shaped cutter and an insert. It’s used to drill holes in hard or soft rocks. The cone shape provides a bit of a shoveling action in soft rock, and a crushing action in harder rock.
These bits are used to drill holes in oil and gas wells. They’re added to drill strings and are designed to cut through the rock layers between Earth’s surface and the oil/gas reservoirs. These bits can also be used to seal the formation of a wellbore. The first roller-cone bit was developed in 1909 by Howard R. Hughes, Sr.
Tricone Rock Drill Bits work similarly to conventional cone-shaped drill bits. The bit consists of cone-shaped teeth that crush the rock directly under them. The force is then dispersed around the area that is affected by the cone. The cone’s shape can be different depending on the rock’s hardness.
Tricone bits were originally developed for the oil industry, and have since been adapted to suit virtually any drilling application. They can be used on almost any rock type, and are ideal for directional drilling.
- Concave hammer
The concave hammer drill bit is a type of bit that is used in drilling. They do not have a cylindrical shank and have an average diameter of about 6 inches. This drill bit has a long wear life because of its unique bit retention system. It is also lighter and shorter than other drill bits, which reduces overall operating costs.
Most hammer drills are equipped with a depth stop to prevent over-drilling. This feature helps prevent a person from drilling through concrete to the hollow core, which can be dangerous. Other types of hammer drills have a back handle to help stop them if they are going to drill too deeply.
- Drag bit
There are several different types of rock drill bits. They are used to drill through hard or soft rock. A 100 rope is designed for 1″ holes, a 125 rope is designed for holes 2 1/2″ and above, and so on. The steel used for these bits is usually carburized, meaning the outside of the bit is extremely hard. The inner steel is less hard, allowing the bits to be forgiving under tough drilling conditions.
Another type of rock drill bit is a roller bit. These bits feature rollers that are conically shaped and mounted on spindles at an angle to the axis. They are used in a variety of formations, including oil wells. Roller bits are generally used in rock drilling at slower speeds and with a higher bit weight.