With the annual manufacturing capacity of 120 drilling rigs and 500 mud pumps, HH has the world's largest rig assembly and test yard in China, where 24 rigs can be assembled/rigged up simultaneously.

HH possesses a first-class fabrication workshop, machining workshop, assembly workshop, forging workshop and related machining equipment to manufacture mast and substructures, hoisting system parts, rotating system parts, high & low pressure mud system parts and auxiliary system parts for rigs.

HH possesses an electrical equipment subsidiary to manufacture and assemble rig electrical equipment , including VFD systems, SCR systems, MCC systems , drilling motors, well site circuitry and lighting systems, etc.

HH possesses a solids control equipment subsidiary for manufacturing mud tanks, solids control equipment, drill floor tools, mud manifolds and personnel camps, etc.