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двухствольное бурение stresses
O&G	simultaneous drilling; dualhole drilling (MichaelBurov); dual hole drilling (MichaelBurov)
O&G, oilfield.	double -hole simultaneous drilling; dual -hole simultaneous drilling
O&G. tech.	double-hole drilling; dual-hole drilling
oil	double barreled drilling; double-barreled drilling; double-directional drilling; double-inclinated drilling; double-simultaneous drilling; dual-hole simultaneous drilling

двухствольное бурение: 5 phrases in 3 subjects

Makarov	1
Oil / petroleum	2
Oil and gas	2