00795nab a2200181 4500 20260520004208.0 260224s xxu New rig construction targets onshore unconventional resources 18/09/2006 ; 18/09/2006 3 p. Unconventional onshore US drilling is driving mergers, rig utilization, drilling techniques and innovative rig designs. New designs may bring the next step improvement in productivity gains as drillers embark on the largest retooling effort in 25 years. World Oil Vol. 226, no. 8 (agos. 2006) ; p. 43-45 ARTICULO Mason, Richard 33503 Equipos de perforación 115 Estados Unidos 2859 180583 180583 0 0 0 0 248402 BAAB BAAB 2026-03-05 200040269 0 200040269 2026-03-05 23:45:42 2026-03-05 ARTICULO