Patent ID: 7387176

Claim:
A down hole air diverter comprising: a) a first opening in communication with the central passageway of a drillstring; b) a second opening in communication with the well bore annulus; and c) a means to control the flow of pneumatic fluid between said first opening and said second opening, wherein said means to control the flow of pneumatic fluid further comprises: a) a first sealing means to selectably control communication with the well bore annulus, wherein said first sealing means is disposed proximate to said second opening; b) a first biasing means to control said first sealing means; and c) said first sealing means allowing communication with the well bore annulus when the force exerted by the well bore annulus pressure exceeds the force exerted by said first biasing means and preventing communication with the well bore annulus when the force exerted by the bias pressure of said first biasing means exceeds the force exerted by the well bore annulus pressure.