WELL BOTTOM CLEANING DEVICE Russian patent published in 2014 - IPC E21B7/28 

FIELD: oil and gas industry.

SUBSTANCE: well bottom cleaning device includes an actuating element with a tie-rod, on the lower end of which a soil collecting machine is fixed. The tie-rod is hinged in the actuating element and installed with a possibility of movement of the soil collecting machine in radial direction and rotation relative to the actuating element axis, in which there additionally arranged and installed is a tie-rod movement mechanism made on the basis of gear engagement. The actuating element is hollow; in its cavity there installed is an actuating axial element with a gear groove interacting with a drive gear fixed on the tie-rod end and being an element of a hinge connection of the tie-rod and the actuating element. The soil collecting machine is made in the form of a bucket hinged on the lower end of the tie-rod and provided with side location of the intake part, with a slanted side wall facing to the widened well wall, and with a flat bottom. The axis of the hinge connection of the bucket with the tie-rod is located perpendicular to the axis passing through bucket centre of gravity, and to the side intake part of the bucket, which is equipped along the perimeter of the cutting edge. Deflecting walls are installed between the bottom and the upper wall of the bucket.

EFFECT: improving operating efficiency of the device; providing cleaning of a widened flat bottom of a well.

2 cl, 6 dwg