O.C.T.G Drilling reduces the time spent on drilling and running casing and also affords further flexibility because drill bits and other down hole tools can be efficiently tripped inside the casing by wire line, latched to the bottom-most joint of casing for drilling, and retrieved through the casing when necessary. Ferdous petro Ahan Co. (petroferro) has well-established relationships with outsources companies and the experience necessary to supply all your casing drilling services and equipment needs on time, wherever you need them.