Vandiver, "Case Studies of the Bending Vibration and Whirling Motion of Dril Collars", SPE/IADC Drilling Conference, Paper SPE 18652, Feb. 2-Mar. 3, 1989, New Orleans, pp. 282-290, Dec. 1990. |
Zhang et al., "Precession of Rotary Drillstrings Should be Eliminated", SPE Advanced Tech. Series, Paper SPE 19360, 3(1):23-28, May 1995. |
Henneuse, "Surface Detection of Vibrations and Drilling Omptimization: Field Experience", IADC/SPE Drilling Conference, Paper SPE 23888, Feb. 18-21, 1992, New Orleans, pp. 409-423. |
I Rey-Fabret et al., "Detecting Whirling Behaviour of the Drill String from Surface Measurements", SPE Annual Technical Conference and Exhibition, Paper SPE 38587, Oct. 5-8, 1997, pp. 223-231. |