Wells – Processes – Cementing – plugging or consolidating
Patent
1987-02-20
1988-04-12
Leppink, James A.
Wells
Processes
Cementing, plugging or consolidating
166177, E21B 3314
Patent
active
047367946
ABSTRACT:
A pipe string is suspended from the surface within a well casing installed in a well. The pipe string is centered within the casing and free from connection therewith except at a down hole point in the casing near the bottom thereof whereat the pipe is attached to the casing. Cement is flowed down the pipe string and out the bottom end thereof from where it flows up along the outer wall of the casing to form a cement annulus therearound. While the cement is being flowed, sonic energy is fed to the pipe string from a sonic oscillator attached thereto. The sonic energy travels down the pipe string and is fed to the bottom of the casing and operates to assure that the cement fills the area around the casing in a uniform manner, at the same time effecting the release of gas bubbles, dirt, rust, scale and other particles from the casing surface to facilitate the formation of a good bond between the cement and the casing wall.
REFERENCES:
patent: 2156207 (1939-04-01), Terrill
patent: 4393932 (1983-07-01), Bodine
patent: 4429743 (1984-02-01), Bodine
patent: 4512401 (1985-04-01), Bodine
patent: 4640360 (1987-02-01), Bodine et al.
patent: 4653587 (1987-03-01), Bodine
Bagnell David J.
Leppink James A.
Sokolski Edward A.
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