Coal bed methane (CBM), coal seam gas ((CSG), or coal mine methane (CMM) is a form of natural gas extracted from coal beds. It is generally sweet but may contain a few percent of carbon dioxide.

Parveen manufacture and supplies surface wellheads and other surface equipment for the extraction of CBM. The Parveen Casing Head is made from steel and uses three packing rings. These heads are suited for wells with working pressure up to 2000 PSI and allow string suspensions, with all sizes being full opening.