Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1987-11-04
1990-08-28
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
364507, 364422, 73598, 73602, 181105, G01V 140
Patent
active
049531476
ABSTRACT:
An acoustic transducer having a curved surface to match the inner or outer surfaces of a target surface such as a cylindrical borehole tubular is disclosed. A sequence of excitation pulses causes the transducer to launch a series of high-frequency, short duration acoustic energy pulses toward the tubular. The transducer face receives echos reflected from the surface of the tubular, including multiple echo structures indicative of the repeated echoing of the acoustic energy between the inner and outer faces of the tubular. The characteristics of the tubular surfaces, including the location, area and depth of any corrosion pits on the tubular surfaces, are determined from the full echo waveform. A rule-based Expert System analyzes the full waveform of the echo pulses returned from the tubular to determine the most likely characteristics of the surfaces which produced the full echo waveform. More specifically, the Expert System uses expertise about the acoustic properties of the target medium, as well as constraints chosen by an expert, to determine which signal structures are informational and which signal structures are confounding. As the confounding structures are selectively eliminated from consideration, the Expert System draws conclusions about the condition of the target surfaces.
REFERENCES:
patent: 3369626 (1968-02-01), Zemanek, Jr.
patent: 3407650 (1968-10-01), Dickinson, III
patent: 3503038 (1970-03-01), Baldwin
patent: 3518679 (1970-06-01), Baldwin et al.
patent: 3754472 (1973-08-01), Dory
patent: 3815124 (1974-06-01), Brewer
patent: 3944942 (1976-03-01), Chudleigh, Jr.
patent: 3961683 (1976-06-01), Delignieres
patent: 3996791 (1976-12-01), Niklas et al.
patent: 4027281 (1977-05-01), Greve et al.
patent: 4219810 (1980-08-01), Joosten
patent: 4254479 (1981-03-01), Wiley
patent: 4255798 (1981-03-01), Havira
patent: 4274288 (1981-06-01), Tittmann et al.
patent: 4290308 (1981-09-01), Dau
patent: 4340944 (1982-07-01), Dory
patent: 4385255 (1983-05-01), Yamaguchi et al.
patent: 4389893 (1983-06-01), Ophir et al.
patent: 4399704 (1983-08-01), Gardineer et al.
patent: 4409838 (1983-10-01), Schomberg
patent: 4412315 (1983-10-01), Flournoy
patent: 4415895 (1983-11-01), Flagg
patent: 4428235 (1984-01-01), Sugiyama
patent: 4428237 (1984-01-01), Zeger et al.
patent: 4435985 (1984-03-01), Wickramasinghe
patent: 4552020 (1985-11-01), Auphan
patent: 4586380 (1986-05-01), Patterson
patent: 4587641 (1986-05-01), DiFoggio
patent: 4591983 (1986-05-01), Bennett et al.
patent: 4641529 (1987-02-01), Lorenzi et al.
patent: 4670848 (1987-06-01), Schramm
patent: 4698793 (1987-10-01), Wu
patent: 4741018 (1988-04-01), Potratz et al.
patent: 4744030 (1988-05-01), Carlson et al.
Materials Evaluation, No. 40, Dec. 1982, J. L. Rose et al., "A Physically Modeled Feature-Based . . . ", pp. 1367-1373.
Materials Evaluation, No. 42, Jan. 1984, J. L. Rose et al., "A Methodology for Reflector Classification . . . ", pp. 98-101.
Benoit Froelich et al., "Cement Evaluation Tool-A New Approach to Cement Evaluation", SPE 10207, 1981.
Alain Dumont et al., "A Single Tool for Corrosion and Cement Evaluation", Society of Petroleum Engineers of AIME, SPE 13140, 1984.
C. C. Carson & T. Bauman, Use of an Acoustic Borehole Televiewer to Investigate Casing Corrosion in Geothermal Wells, Corrosion 86, Pr. 408, Mar. 17-21, 1986.
Maksym et al., "Machine Analysis of Acoustical Signals", Pattern Recognition, vol. 16, No. 6, pp. 615-625 (1983).
H. Penny Nii, "Blackboard Systems: The Blackboard Model of Problem Solving and the Evolution of Blackboard Architectures", The AI Magazine, Part One, pp. 38-53 (1986).
H. Penny Nii, "Blackboard Systems: Blackboard Application Systems, Blackboard Systems from a Knowledge Engineering Perspective", Part 2, The AI Magazine, pp. 82-106 (1986).
Donald A. Waterman, A Guide To Expert Systems (Addison Wesley Publishing Co., 1986), pp. 63-69 and 394.
Swann Tod
Tarcza Thomas H.
The Stnadard Oil Company
LandOfFree
Measurement of corrosion with curved ultrasonic transducer, rule does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Measurement of corrosion with curved ultrasonic transducer, rule, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of corrosion with curved ultrasonic transducer, rule will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1594930