Downhole self-isolating wellbore drilling systems

摘要

One example of a downhole self-isolating wellbore drilling system to pulverize formation cuttings includes a cutting grinder tool and an isolation tool. The cutting grinder tool can be attached to a drill string uphole relative to a drill bit attached to a downhole end of the drill string. The cutting grinder tool can receive and pulverize formation cuttings resulting from drilling a formation using the drill bit. The isolation tool can be attached to the drill string uphole relative to the cutting grinder tool. The isolation tool can control flow of the pulverized formation cuttings mixed with a drilling mud uphole through the drill string.

主权项

1. A wellbore drilling system comprising:
a cutting grinder tool attached to a drill string uphole relative to a drill bit attached to a downhole end of the drill string, the cutting grinder tool to receive and pulverize formation cuttings resulting from drilling a formation using the drill bit; and an isolation tool attached to the drill string uphole relative to the cutting grinder tool, the isolation tool to control flow of the pulverized formation cuttings mixed with a drilling mud through the drill string based on a presence of hydrocarbons released from the formation in the mixture.