Patent ID: 8069924
Filing Date: 2011-12-06
Classification: E21B,F04F

Abstract:
1. A well jet device comprising a body provided with bypass windows and an insert provided with a jet pump, said insert being provided with a through channel and a channel for supplying an active fluid to a nozzle of the jet pump, a channel for supplying a pumped out fluid to the jet pump, said channel being connected to the through channel, and an output channel, and a mounting seat is made in the through channel above the channel for supplying a pumped out fluid for the purpose of arranging a sealing unit in the through channel, said sealing unit is provided with an axial channel for passing via the sealing unit and via the through channel a cable or wire for the purpose of arranging borehole instruments and equipment on the cable or wire and below the jet pump in a well with the possibility of moving them along the well borehole when the jet pump is or is not operated, said output channel communicates with the inner cavity of the body upstream the jet pump, and the insert is provided with sealing elements, characterized in that the body is provided with a supporting sleeve that is axially movable and spring-loaded against the body, and the insert with the jet pump is installed on a mounting seat made in the supporting sleeve, said supporting sleeve being provided with bypass openings in a wall of the supporting sleeve and a flange in a lower part of the supporting sleeve, an annular recess is made in the body under the bypass windows, said recess limiting by its ends movements of the supporting sleeve flange arranged therein and communicating with the body bypass windows through a gap between the supporting sleeve and the body with the bypass windows, in the lower position of the supporting sleeve said channel for supplying an active fluid being connected to a space surrounding the body through the bypass openings and the bypass windows and in its upper position the body bypass windows being closed by the supporting sleeve wall.