Patent ID: 9194182
Filing Date: 2015-11-24
Classification: E21B

Abstract:
1. A hydraulic rotary percussive device of the drilling type, intended to drill boreholes, including: a casing forming a support, a striking mechanism including a longitudinal body, rotatably mounted in the casing along the axis of the body, comprising a cylinder extending along the axis of the body, a striking piston slidingly mounted inside the cylinder and intended to strike a shank coupled to a drill rod equipped with a tool, and a distribution device arranged to control an alternating movement of the striking piston along the axis of the body, a motor arranged to drive the body of the striking mechanism in rotation along an axis of rotation substantially coinciding with the axis of the body, wherein the striking mechanism comprises a closing lid mounted on the body and arranged to close one of the ends of the body, the closing lid being coupled in rotation to an output shaft of the motor and including the distribution device at least in part, the distribution device includes a distributor mounted in a first bore formed in the closing lid, and a control means for controlling the movement of the distributor, the control means being arranged at least partially in the closing lid.