TY  - SER
AU  - Schuh,Frank J.
AU  - Herbert,Pat
AU  - Herbert,Pat
TI  - New technologies for rotary steerables
KW  - Perforación rotary
KW  - Perforación direccional
N2  - A rotary steerable system with new hardware and software technologies promises to hit directional targets within 1 ft (3 m) and track horizontal target planes within inches
ER  -