CIRCUMFERENTIAL AND LONGITUDINAL CUTTER COVERAGE IN CONTINUATION OF A FIRST BIT DIAMETER TO A SECOND EXPANDABLE REAMER DIAMETER.

  • US 20140311802A1
  • Filed: 06/04/2014
  • Published: 10/23/2014
  • Est. Priority Date: 06/27/2008
  • Status: Active Grant
First Claim
Patent Images

1. A bottom hole assembly for use in a wellbore comprising a fixed diameter bit wherein a plurality of cutters extend from a central location to the outer ends of the bit to form a first diameter;

  • and an expandable reamer wherein a further plurality of cutters provide continuation from the first diameter and expand to a second pre-determined diameter by engaging the wellbore in at least 7 different circumferential points.

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