TY  - SER
AU  - Williams,Bob
TI  - US land drilling markets stabilize, with unconventionals dominating
PY  - 2010///
CY  - 
PB  - 
N2  - Transcripción del resumen del autor. Trends in the increasingly bifurcated rig sector include the rebound of oil-directed activity relative to gas, more horizontal drilling and stacking of smaller rigs
ER  -