Injecting a fluid into a borehole ahead of the bit

Details Injecting a fluid into a borehole ahead of the bit Injecting a fluid into a borehole ahead of the bit

2007-10-16

2007-10-16

Bates, Zakiya W. (Department: 3676)

Boring or penetrating the earth

Processes

C175S318000, C175S324000, C175S393000

Reexamination Certificate

active

10484547

ABSTRACT:
A method and system for introducing a fluid into a borehole, in which there is arranged a tubular drill string including a drill bit, wherein the drill bit is provided with a passageway between the interior of the drill string and the borehole, and with a removable closure element for selectively closing the passageway in a closing position, and wherein there is further provided a fluid injection tool comprising a tool inlet and a tool outlet, the method comprising passing the fluid injection tool through the drill string to the closure element, and using it to remove the closure element from the closing position, passing the fluid injection tool outlet through the passageway, and introducing the fluid into the borehole from the interior of the drill string through fluid injection tool into the borehole.

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