Patent ID: 11879335
Assignee: CANOPUS DRILLING SOLUTIONS HOLDING B.V.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 6:
7. The method according to claim 1, wherein the drill bit is a mechanical drill bit further comprising one or more wash nozzles on the bit face, and said rotating of said drill bit involves mechanical cutting of the borehole bottom by said mechanical drill bit to deepen the borehole,
the method further comprising, simultaneously with said impingement with the borehole bottom by said stream in the form of said abrasive jet,
straining the abrasive particles in said first and second stream portions upstream of said abrasive jet nozzles and said wash nozzles, and
deflecting the strained abrasive particles into the abrasive jet nozzles, while
passing the drilling fluid in said first and second stream portions of the stream into both the abrasive jet nozzles and the wash nozzles.