WELL SEPARATOR Russian patent published in 1995 - IPC

FIELD: well drilling. SUBSTANCE: well separator has body with outlet holes. Inner surface of body opposite to outlet holes is conical. Located body is flow deflector in form of stepped turbine with hollow shaft. Flow deflector forms with body and annular space communicated with external space through body outlet holes. Annular space is communicated with space above flow deflector. Hollow shaft of flow deflector is plugged in upper part and has outer longitudinal blades located below turbine blades. Hollow shaft has side holes opposite to body conical part. Side holes communicate annular space with shaft hollow. EFFECT: higher efficiency of separation of solid phase and filter from drilling mud in colmatation of permeable rocks. 1 dwg