(vb.) Drilling. To pump fluid through the whole active fluid system, including the borehole and all the surface tanks that constitute the primary system. See: Bottomhole Circulating Temperature, Break Circulation, Circulation, Pack Off
Schlumberger Ltd. (The World's Leading Supplier Of Technology, Integrated Project Management And Information Solutions to Customers Working in The Oil and Gas Industry Worldwide), Schlumberger Oilfield Glossary Cedex, France 2014. http://www.glossary.oilfield.slb.com/en/Terms/sym/ a.aspx, (Ergo - Brit) {766}