Title: Seismic method for determining the position of the bottom of a long pipe in a deep borehole

Abstract: A method and apparatus for determining the position of the bottom end of a long pipe in a deep water-filled borehole, comprising generating a shock wave in the water at the surface end of the pipe, timing the travel of the shock wave down the pipe to the bottom end thereof, where the shock wave will pass into the liquid in the borehole, generating an expanding seismic wave in the earth. Setting out a plurality of geophones on the earth at the surface to detect the arrival of the seismic wave. Recording the geophone signals and determining the arrival times of the seismic wave. Determining the travel times of the seismic wave to each geophone and determining the position of the end of the pipe.

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Inventors: Silverman, Daniel (Tulsa, OK, US)
Bailey, John R. (Tulsa, OK, US)

Application Number: 475581
Filing Date: 1974-06-03
Publication_date: 1976-09-07
Assignee:
Primary Class(es): 367/36 175/1, 175/40, 181/102, 181/106, 181/119, 181/120
Other Classes:
US Patent Ref:

2281751	May, 1942	Cloud	175/1.
2770312	Nov, 1956	Silverman	181/106.
2898084	Aug, 1959	Eckel et al.	175/1.
2933144	Apr, 1960	Scott et al.	340/18.
3055450	Sep, 1962	Richards	181/118.
3058540	Oct, 1962	Simpson	181/118.
3268859	Aug, 1966	Watts	340/15.
3427652	Feb, 1969	Seay	166/308.
3739871	Jun, 1973	Bailey	175/1.
3817345	Jun, 1974	Bailey	340/15.

Other Refs:
Primary Examiner: Birmiel, Howard A.
Assistant Examiner:
Attorney: Head, Johnson & Chafin