Hebei Hejianshi FangLei Drill Euipment CO., LTD specializes in drill bits, drill pipe,Mud pump and stabilizers for water well, oil field, construction, geothermal, directional boring, and underground foundation work all over the world. Our purpose is to sell the best quality products at the lowest possible price.We are professional supplier of new and used(rebuilt) drill bits used for oil filed, water well. Including tricone bits,PDC bits and drill pipe. Various of model and dimension available. Good condition and reasonable price.We also import junk tricone bits and PDC bits 437Soft Formation TCI Tricone BitsThe 437 TCT bits are used to drill low compressive strength, very soft formations. TCI bits maximize the use of both conical and chisel tungsten carbide inserts of large diameters and high projection. This cutting structure design, combined with maximum cone offset, result in high bit penetrate one rates. The deep intermesh of cutter rows prevents bit bailing in sticky formations.517Medium Formation TCI Tricone BitsThe 517 features aggressive chisel tungsten carbide insert on the heel rows and inter rows. This design provides a fast drilling rate and added cutting structure durability in medium-to-medium hard for-mationes. The HSN rubber O-ring provides adequate sealing for bearing durability.637Hard Formation TCI Tricone BitsThe 637 bits can be used to drill hard and abrasive forma-tions . Wear-resistant tungsten carbide inserts are used in the outer rows to prevent loss of bit gauge. Maximum numbers of hemispherical-durability and long life.617Medium-Hard Formation TCI Tricone BitsThe 617 feature robust chisel tungsten carbide inserts on the heel row and conical on the inner rows. This design provides a fest drilling rate and added cutting structure durability in medium to medium hard formation. The HSN rubber O-rin provides adequate sealing for bearing durability .