Long Drill Machine

Drilling operation is the first contact between the formation and the nonnative fluids and equipment. Drilling fluids play a vital role during the drilling operations by lubricating the bottom-hole assembly, cooling the drilling bit, lifting-up the cuttings, and forming impermeable filter cakes.There are many different types or configurations of drilling machines, but most drilling machines will fall into four broad categories: upright sensitive, upright, radial, and special purpose.In street slang, "drill" means to fight or retaliate, and "can be used for anything from females getting dolled up to all out war in the streets." Dro City rapper Pac Man, considered the stylistic originator of the genre, is credited as the first to apply the term to the local hip hop music.