TY  - SER
AU  - Mason,Richard
TI  - New rig construction targets onshore unconventional resources
KW  - Equipos de perforación
KW  - Estados Unidos
N2  - 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
ER  -