Apparatus and method for cementing wells

Details Apparatus and method for cementing wells Apparatus and method for cementing wells

1995-01-12

1997-06-24

Tsay, Frank

Wells

Brushing, scraping, cutting or punching-type cleaners

Bow spring type

166173, 166175, 1661773, E21B 3308

Patent

active

056410182

ABSTRACT:
An apparatus and method for cementing a pipe in a well. A wiper is engaged with a pipe section as the pipe section is lowered into the wellbore. The wiper contacts the wellbore as the pipe section is reciprocated or rotated within the wiper. The wiper contacts and cleans the exterior surface of the pipe section as the pipe section is moved relative to the wiper. By cleaning the exterior of the pipe section before cement is placed between the pipe section and the wellbore, the potential for channeling in the microannulus between the pipe section exterior and the cement is substantially reduced.

REFERENCES:
patent: 2611146 (1952-09-01), Buckley
patent: 2655679 (1953-10-01), Grant
patent: 2809012 (1957-10-01), Stevens
patent: 2966690 (1961-01-01), Taylor, Jr.
patent: 3124196 (1964-03-01), Solum
patent: 3200884 (1965-08-01), Solum et al.
patent: 3822753 (1974-07-01), Tate
patent: 4531582 (1985-07-01), Muse et al.

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