Apparatus and method for well repair operations

Details Apparatus and method for well repair operations Apparatus and method for well repair operations

1977-01-17

1978-02-21

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166 551, 166 64, 166 66, 166277, 166285, 166297, E21B 3313, E21B 43119, E21B 4706

Patent

active

040747565

ABSTRACT:
Flow channels behind the casing in a well are plugged by detecting a circumferential temperature anomaly on the casing, perforating in the direction of such anomaly, and introducing cement into the perforations. The apparatus for locating and perforating into a flow channel includes a sensitive temperature sensing assembly capable of detecting temperature differences as low as 0.01.degree. F, and an attached perforating gun having a fixed orientation in relation to the temperature sensing assembly.

REFERENCES:
patent: 2451520 (1948-10-01), Teplitz
patent: 2842205 (1958-07-01), Allen et al.
patent: 3426849 (1969-02-01), Brumble, Jr.
patent: 3815677 (1974-06-01), Pennebaker, Jr.
patent: 3967681 (1976-07-01), Curzon

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