Down hole drilling tools classification

Down hole drilling tools classification: drill is a major and essential part of the drill string, its main role is to transfer torque delivery during drilling mud and constantly connected to the drill string in order to achieve longer continue to raise deep eyes purpose. Drill collars located in the drill bit and drill hole assembly or worsen between the drill pipe, drill main role is to provide control WOB and inclination,drill collars are generally made by high alloy steel forging.

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.

OCTG tubing is mainly used to transport oil, gas well drilling and oil and gas

OCTG tubing is mainly used to transport oil, gas well drilling and oil and gas. It includes oil drill pipe, casing, tubing pumping. Oil Drill Pipe used to connect the drill collar and drill bit and drilling power transfer. Oil casing is mainly used to support the rear of the wall during drilling and completion, and after completion to ensure the normal operation of the entire drilling process wells. The main pipeline pumping oil at the bottom of the oil and gas transport to the surface.
                   

Tubing coupling is an oil drilling tool

Tubing coupling is an oil drilling tool, mainly for tubing connections. Pipe couplings mainly to solve the existing coupling due to fatigue fracture prone to stress concentration problems.
Tubing coupling structures are: tubing ends and the inner wall of the coupling connected to the tapered threads, ends with the tubing coupling body with the same thread pitch flat with threaded connect. Relieving single tapered threaded pipe connection male thread root stress concentration features, easy to produce fatigue fracture, good connection effect. Effectively prevent the oil well tubing string broken off accident.
Coupling into tubing coupling and casing couplings. Commonly used steel grade J55, K55, N80, L80, P110 and so on.