Hole opener drilling

Hole opener drilling include: kelly, drill pipe, heavy weight drill pipe, drill collars, adapters, drill stabilizer, downhole drilling, shock absorbers, drill and so on. And these downhole tool string connected together to form a tube called the drill string. The drill string is ground and underground communication hub. Drilling, power transmission and conveying surface drilling, relying drillstring to achieve; complex situations change formations, underground, can be reflected through the drill string to the ground; in addition to other jobs in the drilling process, such as coring processing downhole accident, midway test and so must rely on the drill string to achieve.