| http://www.w3.org/ns/prov#value | - drill pipe and the formation wall to the surface, c. entraining in the circulating mud such oxygen and H2 S as may be encountered, and d. reacting the entrained oxygen with said sulfite and/or bisulfite and reacting the entrained H2 S with said iron oxide under the pressure so present to form a stable reaction product. 9.
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