TY  - SER
AU  - Baker,Ryan
AU  - Shen,Yuelin
AU  - Zhang,John
TI  - Difficult directional intervals in Barnett spur development of new PDC bit design
PY  - 2010///
CY  - 
PB  - 
N2  - Transcripción del resumen del autor. The new cutter technology brought the advantages of PDC drilling to applications in abrasive formations that had previously required roller-cone bits
ER  -