Boring or penetrating the earth – Processes – Boring with specific fluid
Reexamination Certificate
2010-05-11
2011-11-01
Gay, Jennifer H (Department: 3676)
Boring or penetrating the earth
Processes
Boring with specific fluid
C175S206000, C175S207000, C175S066000, C175S068000, C175S069000
Reexamination Certificate
active
08047305
ABSTRACT:
A system for forming a subterranean wellbore may include a pump and an additive supply. The pump pumps a drilling fluid into the wellbore while also generating a pressure differential that draws an additive across a supply line connected to the additive supply. The drilling fluid may be a gas or a liquid. A method for forming a wellbore may include drilling the wellbore, circulating a drilling fluid in the wellbore using a pump; and supplying an additive to the drilling fluid by flowing the additive across a supply line using a pressure differential generated by the pump. The pump may generate a vacuum pressure at a supply line outlet and/or create a pressure differential in the supply line. The flow of additive across the supply line may be regulated and/or stopped when the pump is not operating.
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Dye William M.
Hansen Nels A.
Trenery, Jr. John B.
Baker Hughes Incorporated
Gay Jennifer H
Mossman Kumar & Tyler PC
Ro Yong-Suk
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