Drill Rod

  • Drilling Rod SubDrilling rod sub is used as a joint to connect the single drill rod, such as the internal threaded drill rod. It can be the joint tool for oil and natural gas, etc. It is made of hardened alloy. And all the materials should have excellent performance in tensile strength, yield strength, elongation and hardness. Its product should be in strict accordance with the standard of API Spec 7 and SY /T 5290-2000. The surface of the ...
  • KellyKelly is a kind of drill rod in the shape of a six-sided square cross section. It is made of AISI 4145H alloy steel in accordance with the specification of API and SY/ T 6509 standard. The raw material is conducted integrate heat treatment to achieve the excellent thermal performance. With concern to its thread, it is treated with cold rolling, copper plating and phosphating ...

Drill rod is a tube or tube-like tools with its end threaded. It is part of the drill string which consists of drilling bit, drill collar, specialized sub and kelly. It is used for rock drill and dowels. Specifically, it is used to connect the drill bit and deliver the power to it. The drill rod enters into the drilling hole together with the drill bit. The drilling rod can transmit the drill mud to the drill bit, too. It is widely used in the exploration and extraction of oil. It can be used repetitively.
As for its material, it made of carbon steel at particular steel grade. The materials should enjoy high strength, toughness, hardness and reliability to ensure the long-term and safe use of drill rod. Usually the materials should be manufactured by CNC (computer numerical control) and is heat treated.
There are numerous types of drill rod, such as diamond, wire-line drill rod, external threaded and internal threaded drill rod and left-hand threaded, right-hand threaded drill rod as well as kelly.