Method of locating an anomaly in a tubular member in a well

Details Method of locating an anomaly in a tubular member in a well Method of locating an anomaly in a tubular member in a well

2006-08-22

2006-08-22

Patidar, Jay M. (Department: 2862)

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

C324S235000, C166S255100

Reexamination Certificate

active

07095223

ABSTRACT:
A detector assembly and methods including a magnetoresistive sensor capable of detecting anomalies in the wall of a casing string disposed in a wellbore. Examples of anomalies include gaps between casings such as due to casing joints, air gaps in casing threads such as due to flush casing joints, enlarged casing wall thickness such as due to external casing collars, damaged casing, perforations, and other discontinuities or deformities in the casing. The detector assembly and methods detect perturbations in the earth's magnetic field caused by the anomalies. The detector assembly generates essentially no magnetic or electromagnetic field so that other downhole instrumentation is not affected by its presence.

REFERENCES:
patent: 3015063 (1961-12-01), Ownby
patent: 3570594 (1971-03-01), Hamilton
patent: 4013945 (1977-03-01), Grosso
patent: 4087749 (1978-05-01), McCormack
patent: 4634978 (1987-01-01), Watanabe
patent: 4794336 (1988-12-01), Marlow et al.
patent: 4852263 (1989-08-01), Kerr
patent: 4918824 (1990-04-01), Farrar
patent: 5251170 (1993-10-01), Daughton et al.
patent: 5329269 (1994-07-01), Watson
patent: 5361838 (1994-11-01), Kilgore
patent: 5420819 (1995-05-01), Pohm
patent: 5424236 (1995-06-01), Daughton et al.
patent: 5526022 (1996-06-01), Donahue et al.
patent: 5532587 (1996-07-01), Downs et al.
patent: 5569544 (1996-10-01), Daughton
patent: 5595830 (1997-01-01), Daughton
patent: 5617071 (1997-04-01), Daughton
patent: 5636159 (1997-06-01), Pohm
patent: 5720345 (1998-02-01), Price et al.
patent: 5729137 (1998-03-01), Daughton et al.
patent: 5768180 (1998-06-01), Pohm
patent: 5831426 (1998-11-01), Black, Jr. et al.
patent: 0014195 (1980-01-01), None
patent: 2109113 (1983-05-01), None
patent: 2143331 (1985-02-01), None
patent: 2327501 (1999-01-01), None
patent: WO 98/12554 (1998-03-01), None
Nonvolatile Electronics, Inc. brochure, May 1998.

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