Well completion technique

Details Well completion technique Well completion technique

1986-01-24

1987-06-16

Novosad, Stephen J.

Wells

Processes

Separate steps of fracturing or attacking formation

166299, 166 63, E21B 43263

Patent

active

046730397

ABSTRACT:
An oil or gas well is completed by cementing a casing string in a well having a special joint providing incipient perforations therein. The incipient perforations are closed during the cementing of the casing string in the well bore and are opened after the cement sets up. Preferably, the incipient perforations are opened concurrently with the fracturing of the cement sheath and the formation from which production is desired. The perforations of this invention are quite large and bear a ratio with the quantity of propellant in which there is at least 14 square inches of casing openings per cubic foot of propellant.

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