competitive price API 7-1 standard spiral drill collar

Drill Collar features:

High quality, unique material

Special medium frequency heat treatment method

Meet the requirements of API SPEC7-1

Advanced super magnetic method and mechanical properties

Strict quality management system

Slick Drill Collar

slick drill collar is made of AISI4145H forging or finishing alloy steel. It can provide weight on bit, reducing the vibration and wings of drill bit to make it work smoothly and controlling the hole deviation.

Spiral drill collar

Spiral drill collar is made of AISI4145H forging or finishing alloy steel as API standard. We can proceed the thread by ways of cold rolling, copper plating or phosphating. We also manufacture machinable double shoulder thread and other specifications of special thread.

Non-magnetic drill collar

Nonmagnetic drill collar is made of low carbon high chromium manganese alloy steel. It has the mechanical properties of good low permeability, excellent intergranular corrosion cracking resistance and wear resistance.