Drill Pipe, Gate Valve, Petroleum Equipment manufacturer / supplier in China, offering Durable API6a Wellhead Christmas Tree Casing & Tubing Head, 3, 000 Psi, Versatile API6a Wellhead Christmas Tree Casing & Tubing Head, Bore Range, API6a Wellhead Christmas Tree Casing & Tubing Head, Bore 2 1/16" and so on.