Acoustics – Geophysical or subsurface exploration – Well logging
Patent
1982-07-13
1984-07-17
Buczinski, S. C.
Acoustics
Geophysical or subsurface exploration
Well logging
367 33, 175 40, E21B 47022
Patent
active
044600593
ABSTRACT:
The specification discloses a method and system for determining the position of a drill bit in the earth without interrupting the drilling operations. In operation, rotation of the drill bit against the formation being drilled generates coherent acoustical signals which are recorded at the surface of the earth by a plurality of spaced detectors. The signals recorded at each of the different detectors are time shifted relative to each other. These time shifts correspond to possible locations of the drill bit within the earth and are controlled to some degree by the length of drill pipe in the borehole. After the acoustic signals are shifted in time their coherency is determined. This procedure is repeated for a number of assumed locations of the drill bit. The drill bit position is determined to be at the location having the highest coherency value. In this manner the surface detectors are focused on precise positions within the earth avoiding interference from acoustical signals generated at the surface or from the drill pipe.
REFERENCES:
patent: Re18565 (1932-08-01), Rosaire
patent: 2062151 (1936-11-01), Weatherby
patent: 2933144 (1960-04-01), Scott et al.
patent: 3208549 (1965-09-01), Alexander et al.
patent: 3249911 (1966-05-01), Gustafson
patent: 3614891 (1971-09-01), Nolte
patent: 3790930 (1974-02-01), Lamel et al.
patent: 3817345 (1974-06-01), Bailey
patent: 3876016 (1975-04-01), Stinson
patent: 3881168 (1975-04-01), Farr et al.
patent: 3933974 (1976-01-01), Silverman et al.
patent: 3947803 (1976-03-01), Brown
patent: 3963093 (1976-06-01), Morris
patent: 3979140 (1976-09-01), Silverman et al.
patent: 3979724 (1976-09-01), Silverman et al.
patent: 3980986 (1976-09-01), Baird et al.
patent: 4001773 (1977-01-01), Lamel et al.
patent: 4003017 (1977-01-01), Bailey
patent: 4033429 (1977-07-01), Farr
patent: 4040003 (1977-08-01), Beynet et al.
patent: 4144949 (1979-03-01), Silverman
Capon et al., "Short-Period Signal Processing Results for the Large Aperture Seismic Array", Geophysics, vol. 33, No. 3, (Jun. 1968), pp. 352-372.
Niedell and Tanner, Semblance and Other Coherence Measures for Multi-Channel Data", Geophysics, vol. 36, No. 3, (Jun. 1971), pp. 482-496.
Lutz et al., "Instantaneous Logging Based on a Dynamic Theory of Drilling", paper presented at Society of Petroleum Engineers 46th Annual Fall Meeting, Oct. 3-6, 1971, printed in Transactions, vol. 253, 1972.
Power et al., "Detection of Hydraulic Fracture Orientation and Dimensions in Cased Wells", Journal of Petroleum Technology, Sep. 1976, pp. 1116-1124.
Buczinski S. C.
Kaiser K. R.
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