Abstract: A well system and method including applying suction to a wellhead housing outlet (8) to divert the flow of subterranean gas from flowing through a gas conduit through the wellhead housing (4). An operation can then safely be performed on a component (e.g. removing a hanger) of the wellhead apparatus. Well gas can be diverted to a flare system (200). Suction can be applied by a venturi system including eductors (104, 106). The method may include opening the gas conduit outlet once a pressure sensed at the conduit outlet is negative. Suction may also be applied to an upper outlet (14).

Abstract: A well system and method including applying suction to a wellhead housing outlet (8) to divert the flow of subterranean gas from flowing through a gas conduit through the wellhead housing (4). An operation can then safely be performed on a component (e.g. removing a hanger) of the wellhead apparatus. Well gas can be diverted to a flare system (200). Suction can be applied by a venturi system including eductors (104,106). The method may include opening the gas conduit outlet once a pressure sensed at the conduit outlet is negative. Suction may also be applied to an upper outlet (14).

Abstract: A separator assembly (1c) in the form of a flare tank for separating and igniting gas from non-gaseous components of a fluid stream (such as a well return). The separator assembly (1c) comprises: at least one degasser (4) having a fluid stream inlet (41) for introducing the fluid stream (well return) into a vessel (40) of the degasser (4) at a reduced velocity, and optionally a degasser gas pressure relief system (60) and non-gaseous component filter (40); a tank (3) having a settling compartment (30) and a suction compartment (31); and a flare (5c) for igniting gas leaving the degasser (4).