Patent application 13782567 (US), filed 2013-03-01
Publication number: US20130228379A1
Title: CONTINUOUS ROTARY DRILLING SYSTEM AND METHOD OF USE
CPC codes: E21B   3/04
E21B   7/06
E21B  17/20
E21B  17/043
E21B  17/05
Office action: rejection, dated 2015-10-16
Rejection reasons: anticipation_102
Prior art cited: ref_id: EP 2 108 780
ref_type: patent
severity: novelty_destroying
Final disposition: granted (2015-10-16)