Patent application 14567411 (US), filed 2014-12-11
Publication number: US20150090458A1
Title: PULSATING ROTATIONAL FLOW FOR USE IN WELL OPERATIONS
CPC codes: E21B  37/00
E21B   7/24
E21B  17/20
E21B  21/00
E21B  28/00
E21B  41/0035
E21B  41/0078
Office action: rejection, dated 2015-10-16
Rejection reasons: anticipation_102
obviousness_103
Prior art cited: ref_id: 3648786
ref_type: patent
severity: novelty_destroying
ref_id: 8381817
ref_type: patent
severity: novelty_destroying
ref_id: 3648786
ref_type: patent
severity: novelty_destroying
Final disposition: pending (2015-10-16)