HL75S, HL95S, HL105S, HL95SS, HL105SS

The business of the group covers petroleum, steel, chemical, petroleum equipment, storage and logistics, petroleum tubular research and development, and several fields including production and processing of petroleum tubular, petroleum equipment and precision instrument, coating and internal and external anti-corrosion treatments of tubular and equipment, production of coating materials and other petro-chemical materials, inspection in petroleum tubular, research and development of proprietary products, and etc. Its product category consists of drilling tools including petroleum drill pipe, drill collar, and heavy weight drill pipe, tubing and casing, pipeline, special coating material, precision instrument, as well as various petroleum drilling and exploration equipments.