| http://www.w3.org/ns/prov#value | - A method of open hole well drilling, comprising:(a) spacing a plurality of valve bodies longitudinally along a drillstring, each valve body having:(i) a wall defining an internal longitudinal fluid flow bore; (ii) a transverse port in the wall; (iii) valving means therein, the valving means including a sleeve shiftable between a first position preventing fluid flow through the transverse port and
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