Boots – shoes – and leggings
Patent
1987-08-10
1989-07-04
Pellinen, A. D.
Boots, shoes, and leggings
367 26, 367 27, G01V 140
Patent
active
048456160
ABSTRACT:
In an acoustic well logging apparatus including one or two transmitters and having a pair of spaced apart receivers, two interval transit times are measured independently through a common zone of interest. The two independent measured values are then compared and the difference is then used in contrast with a threshold determinant based on the period of the transmitted pulses. This comparison shows a difference. If the threshold value is not exceeded by the difference value a quality indication is then obtained suggesting that the acoustic measurements did not suffer from cycle skipping. If the threshold value is exceeded by the difference value, then a possible cycle skip exists. If testing shows that a cycle skip does exist, then the error that it introduces is removed from the final log, and a quality indication is obtained suggesting that the answer is good and that a cycle skip error has been removed.
REFERENCES:
patent: 4223398 (1980-09-01), Blalock
patent: 4346460 (1982-08-01), Schuster
patent: 4460986 (1984-07-01), Millovet et al.
patent: 4535625 (1985-08-01), Lyle, Jr.
patent: 4677596 (1987-06-01), Lyle, Jr. et al.
patent: 4683557 (1987-07-01), Willis
patent: 4684947 (1987-08-01), Zimmer
Beard William J.
Gaffin Jeffrey A.
Halliburton Logging Services Inc.
Pellinen A. D.
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