Sludge collector

Claims

A sludge collector comprising a hollow body with an adapter, a rock-breaking tool, radial channels hydraulically connecting the cavity of the body with the annular space, and peripheral axial channels, a sludge-receiving chamber located in the cavity of the body and a sludge-conducting pipe installed with the possibility of axial movement and equipped in the lower part with an annular conical valve and a jet pump, characterized in that in order to create a uniform annular cross-section in the annular space, the body is equipped with centering elements, and in order to direct the flow of drilling fluid from the peripheral axial channels to the rock-breaking tool, the annular cross-section is covered by a sliding seal with a plurality of wear-resistant plates touching the wall of the uncased borehole, made with slots on a flexible sheet.