Real-time bit-wear estimation using surface-vibration signals. Phase 1

Technical Report · Tue Mar 31 23:00:00 EST 1987

OSTI ID:6922901

Ekchian, L

This research investigated the feasibility of monitoring in real time the condition of an oil-well drill bit, based solely on surface-vibration data. The problem of extracting the desired information on the bit from surface-vibration data is complex. Surface data are heavily masked with corruptive noise due to the extremely noisy environment on the rigs, dynamics of the drill string inside the borehole, attenuation of the vibration signal propagating up the drill string, and unknown lithology, which varies as one drills. Modern estimation theory concepts were introduced to study this stochastic problem and formulate a real-time, bit-wear-estimation methodology.

• Research Organization: OPTIMA Systems, Inc., Burlington, MA (USA)
• OSTI ID: 6922901
• Report Number(s): PB-90-184417/XAB
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
42 ENGINEERING
420500 -- Engineering-- Materials Testing
440800* -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
DRILL BITS
DRILLING EQUIPMENT
EQUIPMENT
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEASURING METHODS
MECHANICAL VIBRATIONS
MONITORING
OIL WELLS
PROBABILISTIC ESTIMATION
REAL TIME SYSTEMS
SURFACES
TEST FACILITIES
WEAR
WELLS