A rock breaking control system and method adapted to formation drillability

Abstract

This invention discloses a rock-breaking control system and method adapted to formation drillability, comprising a housing, a pressure cap, a piston, and an elastic element. The piston is disposed within the housing and is axially slidable along the housing. A first sealing section and a second sealing section of the piston are sealed to the internal cavity of the housing, dividing the internal cavity into an upper cylinder and a lower cylinder. The pressure cap is sealed to and fixedly connected to the end of the housing, and has a central hole along its axial direction for injecting fluid into the housing. The piston also includes a third sealing section that seals to the central hole. A fluid channel is provided within the piston, connecting the central hole in the pressure cap, the upper cylinder, and the lower cylinder. The elastic element is disposed within the housing and applies a force to the piston toward the first cavity. This application helps to suppress harmful vibrations such as drill bit stick-slip vibration, thereby protecting the PDC drill bit.

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