초록 ▼

A drilling system utilizing the drilling fluid in a borehole to drive an apparatus to generate a high-pressure jet of fluid to facilitate the drilling operation. A pressure intensifier disposed between a drilling motor and the drill bit generates high pressure fluid jet. The drilling motor rotates t

A drilling system utilizing the drilling fluid in a borehole to drive an apparatus to generate a high-pressure jet of fluid to facilitate the drilling operation. A pressure intensifier disposed between a drilling motor and the drill bit generates high pressure fluid jet. The drilling motor rotates the pressure intensifier. Fluid enters a high pressure chamber in the pressure intensifier at selected location during each rotation. A piston in the pressure intensifier discharges the fluid from the high pressure chamber to the drill bit bottom at a high pressure. An electrically-operated pulse frequency control device generates fluid pulses of at least two frequencies, each such frequency defining a bit of a binary system.

대표청구항 ▼

[ What is claimed is:] [1.]1. A downhole assembly for use in drilling of a wellbore, said downhole assembly including a drill bit at an end thereof and adapted to receive drilling fluid from a source thereof during drilling of the wellbore, said drilling assembly comprising:(a) a drilling motor gene

[ What is claimed is:] [1.]1. A downhole assembly for use in drilling of a wellbore, said downhole assembly including a drill bit at an end thereof and adapted to receive drilling fluid from a source thereof during drilling of the wellbore, said drilling assembly comprising:(a) a drilling motor generating rotary force upon application of the drilling fluid thereto, said drilling motor adapted to rotate the drill bit to drill the wellbore; and(b) a pressure intensifier operated by the rotary force generated by the drilling motor, said pressure intensifier when operating receiving the drilling fluid at a first low pressure and discharging the received drilling fluid at a second high pressure.