Oil Drill Bits
Definition - What does Oil Drill Bits mean?
Oil Drill Bits, also known as drill bits, are tools which are designed to cut through sedimentary and hard rocks to form a cylindrical hole known as a wellbore in the earth's crust. These drill bits perform rotary drilling methods for discovery of hydrocarbons. The hole created by the drill bits is quite small (3.5 inches to 30 inches) as compared to the depth of the hole drilled.
Petropedia explains Oil Drill Bits
Drill bits are used to drill a hole through earth's crust. These drill bits are classified into two types based on their rock cutting mechanism, i.e., roller cutting drill bits and fixed cutter drill bits.
Roller cutting drill bits are mainly used to drill the earth by fracturing or crushing the rock formation. These drill bits have tooth-shaped cutting elements on the cone-shaped bit surface that roll across the wellbore hole as the bit is moved inside the rock while cutting. The tooth-shaped cutting elements keep rotating while the drill bit performs rotary cutting.
In the fixed cutter drill bits, the cutting elements on the cone-shaped bits remain fixed while the drill bit performs rotary cutting action through the rock formation. These drill bits usually remove rock debris by scrapping or grinding.