Patent ID: 7207399

Claim:
An apparatus for controlling operating pressure in and managing waste from a subterranean borehole, said apparatus comprising: a pressure control section comprising: a choke manifold having an inlet in fluid communication with the subterranean borehole and an outlet; a plurality of choke assemblies selectively in fluid communication with the choke manifold; a plurality of valves along the choke manifold operable to selectively direct flow through the manifold and to one of the plurality of choke assemblies; wherein each choke is independently operable to control the operating pressure in the subterranean borehole; a gas separator section in fluid communication with the choke manifold outlet, said gas separator section comprising: a gas separator operable to remove gases present in the fluid from the choke manifold and discharge a degassed fluid; a waste management section comprising: a vibratory separator receiving the degassed fluid from the gas separator and removing solids from the degassed fluid and discharging fluid; a collection tank having a plurality of pits therein defined by a plurality of spaced apart partitions, wherein a first pit is in fluid communication with a fluid discharge of the vibratory separator; a degasser receiving fluid from the first pit and operable to remove gases entrained in the fluid while communicating degassed fluid to a second pit of the collection tank; a desilter receiving fluid from the second pit and operable to remove additional solids and communicate desilted fluid to a third pit of the collection tank; wherein the third pit of the collection tank is in fluid communication with the subterranean borehole.