Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Christian Leuchtenberg0
Date of Patent
May 6, 2008
0Patent Application Number
112640200
Date Filed
November 2, 2005
0Patent Primary Examiner
Patent abstract
A closed-loop circulating system for drilling wells has control of the flow rates in and out of the wellbore. Kicks and fluid losses are quickly controlled by adjusting the backpressure. Kick tolerance and tripping margins are eliminated by real-time determination of pore and fracture pressure. The system can incorporate a rotating BOP and can be used with underbalanced drilling.
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