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Drill Collars and Non-magnetic Drill Collars
All our Drill Collars and Non-magnetic Drill Collars are manufactured in accordance with API 7-1 Standard as required by the oil and gas industry. Threads can be supplied cold rolled, copper or phosphate coated in accordance with international standards including H90. Drill Collars are also available with hanging slots and slip groove structure.
Our Drill Collars are available in standard dimensions from 3 ⅛" up to 14" and Spiral Drill Collars can be supplied from 3 ⅛" up to 11". Non-standard dimensions can also be supplied as per customer requirements.
Non-Magnetic Drill Collars are made from materials W1813N, W2013N and W2014N – low chrome and nickel alloys of non-magnetic steel. The material is then refined by VOD and formed using a 1400 ton press to meet the requirements in terms of magnetic permeability, mechanical properties and anti-corrosion. Non-Magnetic Drill Collars can be supplied with outer diameters from 4 ¾" up to 11". API Engineering also manufactures Non-Magnetic Integral Heavy Weight Drill Pipes, Non-Magnetic Drill Pipes and Non-Magnetic Stabilizers.
To ensure that there is no intergranular corrosion, every Non-Magnetic Drill Collar is tested using a 180⁰ bending test in accordance with ASTM A262E. All components are tested and supplied with an anti-fatigue report prior to dispatch.