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Geological drill pipe 50×6.5 DZ50
Geological pipe 73×4.5 DZ40
Geological Tube 68×20 DZ50
Geological pipe 83×25 DZ40
Geological pipe 89×4.5 DZ40
Geological pipe 89×4.5 DZ40
Geological pipe 91×10 DZ40
Geological pipe 108×4.5 DZ40
Geological pipe 108×6.5 DZ40
Geological tube 110×10 DZ40
Geological tube 127×4.5 DZ40
Geological tube 127×6.5 DZ40
Geological pipe 146×5 DZ40
Geological pipe 146×7.5 DZ40
Geological pipe 150×10 DZ40
Geological tube 168×6.5 DZ40
Geological pipe and geological drilling steel pipe (YB235-70) is a steel pipe used by the geological department for core drilling. It is a long steel bar with a hollow section and no joints around it. The steel pipe has a hollow cross-section and is used in a large amount as a pipe for conveying fluids, such as pipes for transporting petroleum, natural gas, coal gas, water, and certain solid materials. According to the use, it can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe.
Drill pipe:
Drilling tools are used to connect drills and rods to transmit power. The general components of the drill string are: drill bits, drill collars, drill rods, stabilizers, special joints, and kellys. The basic functions of the drill string are: (1) starting the lower bit; (2) applying the drilling pressure; (3) transferring the power; (4) delivering the drilling fluid; (5) performing special operations: squeezing the cement, treating the underground accident, and the like.
Drill collar:
At the bottom of the drill string, it is the main component of the lower drill assembly. Its main feature is its large wall thickness (typically 38 to 53 mm, which is equivalent to 4 to 6 times the wall thickness of the drill pipe). It has a large amount of gravity and rigidity. It mainly plays the following roles in the drilling process:
(1) Apply pressure to the drill bit;
(2) Ensure the necessary strength under compression conditions;
(3) Reducing the vibration, swing, and jumping of the drill bit to make the drill work smoothly;
(4) Control well inclination.
Geological Steel Pipes - Geological Drilling Steel Pipes - Geological Drilling Seamless Steel Pipes Latest Geological Drilling Seamless Steel Pipe Specification Table Geological Drill Pipe 42×5 DZ50