FIELD: oil and gas industry.
SUBSTANCE: package of inventions is related to oil and gas industry, in particular to cleanout of drilling wells. The device comprises a driving head connected to the tubing string in order to create a countercurrent flow in the well borehole, a separating unit, a separating element and a detachable subunit. The separating unit forms an inner flowing channel. The detachable subunit comprises an inner pipe connected to the front panel and placed inside the body thus forming annular space between the inner pipe and the body. The demountable front panel is connected to the body; it locks fluid flow from the lower end of the annular space between the inner pipe and the body. The front panel has an inlet channel. The inner pipe and panel are capable to discharge debris from the body by detaching. The separating element directs debris in borehole fluid to the annular space between the inner pipe and the body.
EFFECT: increasing debris cleaning efficiency and enlarging functional capabilities of the device.
13 cl, 15 dwg
