Well plug with anchor means

Details Well plug with anchor means Well plug with anchor means

1976-03-18

1977-02-15

Leppink, James A.

Wells

Packers or plugs

With expanding anchor

E21B 3312

Patent

active

040077837

ABSTRACT:
Precompletion apparatus for use in air drilling and casing a problem formation in a well including a casing landing nipple at the lower end of a first string of solid well casing installed by suitable conventional techniques, an expendable plug for engagement in the casing landing nipple to plug a well bore after air drilling below the casing landing nipple to control the well during inserting of a slotted liner, an expending shoe for engaging and displacing the plug downwardly from the landing nipple, a slotted well bore casing for lining a well bore along a problem formation which has been air drilled, and a casing hanger for supporting the slotted liner along the air drilled portion of the well bore from the landing nipple. The plug and hanger each have locking keys engageable with a casing landing nipple and expandable seals for sealing with a seal surface along the casing landing nipple. The expendable plug is used to close the well bore above the air drilled portion for pressure control while lowering the liner into the well bore. The plug is engaged and lowered in the well bore by the expending shoe which is supported on the lower end of the liner. The liner is lowered into the air drilled section of the well bore and supported from the casing landing nipple by the hanger. The plug remains supported from the lower end of the liner after installation of the liner.

REFERENCES:
patent: 2884071 (1959-04-01), Fredd
patent: 2948338 (1960-08-01), Baulins et al.
patent: 3100532 (1963-08-01), Tamplen
patent: 3381755 (1968-05-01), Morrison
patent: 3420304 (1969-01-01), Kilgore
patent: 3467183 (1969-09-01), Young
patent: 3633670 (1972-01-01), Brown

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