... tangential acceleration rotational speed sensor backward whirl frequency radial acceleration borehole whirl Artificial Intelligence accelerometer field data algorithm SPE IADC Drilling Conference vibration kinematic model Mathematical representation of drillstring dynamics began...

.... drillstring design vibrational challenge application drilling operation drillstring dynamics vibration mode drilling program whirl upstream oil & gas information torsional vibration technology modify drill string dynamic avdt tool backward whirl society of petroleum engineers bha component...

... Abstract Since backward whirl was discovered as a severe cause of PDC bit failure, our industry has made great strides toward creating whirl-resistant bits and operating practices. But is whirl still the major cause of PDC bit damage in today's applications? This paper reports on a recent field...

... detection sensor design which is sensitive to whirl yet passively filters out lateral vibration. Test results presented include full-scale BHA testing in a whirl simulation rig in conjunction with field trials at a drilling test facility. In laboratory tests, fully developed backward whirl was produced...

... (ROP), insert breakage, and bearing/seal and bit life are discussed. rop rpm klb lateral vibration specific energy drillstring design bit design field investigation spe 56439 bit rotational speed vibration frequency backward whirl rotational speed wob bit performance roller cone...

... of the latter. Backward whirl of the conventional PDC bit was prevalent in both hard and soft formations. Roller cone bit tests suggested that they too were subject to backward whirl, and the lateral vibrations that resulted were an order of magnitude worse than the axial vibrations commonly associated...

... undergauge stabilizer transverse motion experiment stabilizer upstream oil & gas vibration drill collar shock level restitution coupling friction backward whirl sandstone drill pipe selection drillstring dynamics rock type spe 24582 mwd clastic rock drilling equipment new generation...