Method and apparatus for sealing a wellbore or well casing scree

Details Method and apparatus for sealing a wellbore or well casing scree Method and apparatus for sealing a wellbore or well casing scree

1992-12-14

1994-12-13

Dang, Hoang C.

Wells

Processes

Producing the well

166187, 166370, 166387, E21B 33127, E21B 4312

Patent

active

053722000

ABSTRACT:
A method and apparatus for sealing a section of screened well casing, especially useful in soil venting wells. A foamed rubber sleeve surrounding a pipe is caused to collapse when suction is drawn on the annulus between the pipe and sleeve, allowing the pipe and sleeve to be lowered into place. When the annulus is pressurized the sleeve expands out against the screen to seal the contacted portion against the passage of air.

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patent: 4372389 (1983-02-01), Hamrick et al.
patent: 5048605 (1991-09-01), Toon et al.
patent: 5226485 (1993-07-01), Dobscha et al.

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