Method and apparatus for balanced pressure sampling

Method and apparatus for compensating for drilling line stretch

Method and apparatus for conducting well production tests

Method and apparatus for correcting MWD porosity measurement

Method and apparatus for data transmission in a well bore contai

Method and apparatus for detecting acoustic vibrations in a bore

Method and apparatus for detecting and localizing unwanted...

Method and apparatus for detecting formation hydrocarbons in mud

Method and apparatus for detecting impending sticking of a drill

Method and apparatus for detecting the thermal characteristics o

Method and apparatus for detecting torsional vibration with...

Method and apparatus for detecting well pump-off

Method and apparatus for determing distribution of fluids in a p

Method and apparatus for determining a depth correction for a lo

Method and apparatus for determining an optimal pumping rate...

Method and apparatus for determining characteristics of clay-bea

Method and apparatus for determining characteristics of clay-bea

Method and apparatus for determining characteristics of clay-bea

Method and apparatus for determining characteristics of clay-bea

Method and apparatus for determining characteristics of clay-bea