KNOCKOUT DRUM INSTALLED IN WELL BORE Russian patent published in 2008 - IPC E21B43/38 

FIELD: mining.

SUBSTANCE: facility incorporates an inner pipe for flowing of fluid removed from gas. The pipe is installed in the external pipe and forms with the said external pipe an annular clearance for free gas flowing. The facility is additionally equipped with a plate, which has a breakpoint and at least partially surrounds the said external pipe to form a curved flow passage for produced fluid mixture; an annular clearance inlet of aforesaid breakpoint for free gas flow, in this case, the external pipe has an extended part, located next to the annular clearance inlet and expanding as the said extended part goes from the breakpoint of the plate; the inlet of the internal pipe made below the breakpoint for flow of fluid removed from gas and fluid mixture containing gas and hydrocarbon liquid. The fluid mixture is transferred from the productive zone into the well, which has an external pipe located in the said well and an extended part in its lower end part. Below this part, a disc plate furnished with a good few openings is disposed. According to this method, the following procedures are carried out: transference of fluid via the passage at least partially covering the said external pipe to spin aforesaid fluid mixture around the external pipe; separation of the part of gas from the said hydrocarbon liquid in response to spinning of fluid mixture to produce free gas, press it at the end part of the external pipe, stop free gas twirl caused by disc plate and ensure conditions of its upraise with fluid removal from gas; transference of the said separated free gas via the external pipe.

EFFECT: centrifugal separation of produced fluid mixture into gasses and liquids.

24 cl, 11 dwg