FEEDING DEVICE FOR DOWNHOLE TOOL AND METHOD OF DOWNHOLE TOOL AXIAL FEED Russian patent published in 2017 - IPC E21B4/18 E21B23/14 

FIELD: mining.

SUBSTANCE: group of inventions relates to the field of drilling, namely to an feeding device for a rotating downhole tool. The feeding device (3) for moving the rotating downhole tool (4) in the axial direction during the tube surrounding body (12) part processing contains several feed wheels lying in a plane inclined relatively to a plane which is perpendicular to the central axis of the downhole tool (5), the noted feed wheels are mounted with the ability to move between a retracted inoperative position and an extended operative position at which the feed wheels can bump into the inner wall surface (121) of the pipe body (12) surrounding the noted feeding device (3). Feed wheel suspension, connected to the radial guide and the first actuator, which when activated permits movement of the noted feed wheels with a radial direction component and an axial direction component along the inclined plane defined by the radial guide is provided. Suspension and radial guide are made with the ability to move relative to each other along their inclined mating surfaces.

EFFECT: providing high accuracy while using the cutting tools during drive tube processing.

8 cl, 6 dwg