Drainhole well completion

Details Drainhole well completion Drainhole well completion

1987-04-20

1987-12-22

Leppink, James A.

Wells

Processes

Assembling well part

166 50, 166187, 166191, 166242, 166387, E21B 33124, E21B 3313

Patent

active

047141174

ABSTRACT:
A method for completing a drainhole wellbore with casing but without conventional cementing of the casing wherein in the drainhole portion of the wellbore a casing string composed of alternating casing subs and external casing packer subs is employed, the external casing packer subs carrying an elastic member adapted to be expanded and form a seal between the exterior of the casing string and the wellbore wall, and one or more of the external casing packer subs is activated to expand the elastic member carried by same thereby providing for isolation of discreet segments of the casing string in the drainhole portion of the wellbore to allow for localized production and remedial treatments in the drainhole wellbore.

REFERENCES:
patent: 2271005 (1942-01-01), Grebe
patent: 2798435 (1957-07-01), Armstrong
patent: 3542127 (1970-11-01), Malone
patent: 3865188 (1975-02-01), Doggett et al.
patent: 3918522 (1975-11-01), Suman, Jr.
patent: 4230180 (1980-10-01), Patton et al.
patent: 4248302 (1981-02-01), Churchman
patent: 4258788 (1981-03-01), Patton et al.

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