Patent ID: 7516803

Claim:
A fluid delivery apparatus for a drilling system comprising: a sleeve for attachment between a first drill casing section and a second drill casing section, said sleeve comprising: a first cylindrical wall with a diameter defining a hollow interior, said hollow interior configured so as to receive a drill pipe extending therethrough, a second cylindrical wall provided around said first wall, said second wall having a second larger inner diameter defining an annular space between said walls and within said sleeve, said second cylindrical wall having an exterior with a third larger diameter, a fluid inlet in said second wall in communication with said annular space, a transitional channel attached to the exterior of said second wall that is not concentric with said second wall, said transitional channel being in fluid communication with said inlet, and a plurality of openings in said first wall communicating between said annular space and said hollow interior, wherein said fluid inlet is offset from said plurality of openings.