Method of shutting off a portion of a producing zone in a hydroc

Details Method of shutting off a portion of a producing zone in a hydroc Method of shutting off a portion of a producing zone in a hydroc

1987-06-08

1988-07-26

Suchfield, George A.

Wells

Processes

Graveling or filter forming

166285, 166287, E21B 3314, E21B 33138, E21B 4304

Patent

active

047594080

ABSTRACT:
Disclosed is an invention for shutting off a portion of a producing zone such as a steam override zone in a hydrocarbon producing wellbore. The bottom of the wellbore is filled with a material such as sand up to the bottom of the steam override zone. A pipe is placed and centralized in the middle of the wellbore so that the pipe extends throughout the steam override zone. A cement plug is placed around the centralized pipe while keeping the interior of the pipe free of cement. A larger cylindrical hole is then drilled through the cement plug by using the centralized pipe to center and guide a drill through the middle of the cement plug.

REFERENCES:
patent: 3277962 (1966-10-01), Flickinger et al.
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patent: 3682244 (1972-08-01), Bowman et al.
patent: 3709298 (1973-01-01), Pramann
patent: 4034811 (1977-07-01), Sparlin et al.
patent: 4157116 (1979-06-01), Coulter
patent: 4274487 (1981-06-01), Hollingsworth et al.
patent: 4378843 (1983-04-01), Suman, Jr.
patent: 4589490 (1986-05-01), Darr et al.

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