Journal of Petroleum Technology July 2012 : Page 29

Anti-Stall Technology Instant drilling optimization for challenging wells Stick-Slip Severity 250 200 150 15 100 10 50 0 Rate of Penetration Depth MD (m) 5 0 AST in 30 25 20 Tomax Anti-Stall Technology (AST) is run in the bottom-hole assembly (BHA) where torsional vibration, or stick-slip represents an operational risk and costs time. With AST the stick-slip action from the rock cutting interface is counteracted through a continuous, closed-loop adjustment of depth-of-cut to effect a steady torsional load. The value of the Anti-Stall Technology is proven in a wide variety of operations. STRINGERS ENLARGEMENT ROUGH SEAS PERFORMANCE INTERVENTION www.anti-stall.com E-mail: post@tomax.no Houston: +1 713 557 7542 Aberdeen: +44 1224 774 925 Stavanger: +47 51 9511 70 Also represented in: Rio, Baku, Dammam and Kuala Lumpur ROP (m/hr) SSLIP %

Tomax AS
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