Patent application 14572448 (US), filed 2014-12-16
Publication number: US20150167415A1
Title: DRILLING SYSTEM AND METHOD OF OPERATING A DRILLING SYSTEM
CPC codes: E21B  21/08
Y10T 137/0396
Y10T 137/2934
E21B2200/01
E21B  17/01
E21B  21/067
E21B  21/106
E21B  21/16
Office action: rejection, dated 2015-10-16
Rejection reasons: obviousness_103
indefiniteness_112
Prior art cited: ref_id: 6390114
ref_type: patent
severity: obviousness
ref_id: 20140166360
ref_type: patent
severity: obviousness
Final disposition: granted (2015-10-16)