Single trip completion of spaced formations

Details Single trip completion of spaced formations Single trip completion of spaced formations

1985-04-10

1986-09-23

Leppink, James A.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 551, 166 63, 175 454, E21B 431185

Patent

active

046129928

ABSTRACT:
Two or more spaced formations located downhole in a borehole are completed by employment of a string of perforating guns and by making a single trip to the wellbore. An upper and a lower gun device are tied together by a connecting tubing. The length of the tubing spaces the guns apart a selected amount. The gun string is run downhole and actuated, whereby the casing is perforated adjacent to the two spaced formations. Detonation of the upper gun forces an upper movable member associated with the connecting tubing to generate a pressure wave which is received by a lower movable member located at the upper end of the lower gun. The lower member is connected to cause detonation of the lower gun.

REFERENCES:
patent: 2261859 (1941-11-01), Ricow
patent: 2304408 (1942-12-01), Holifield
patent: 2327141 (1943-08-01), Spencer
patent: 2644519 (1953-07-01), Kanady
patent: 3011551 (1961-12-01), Young et al.
patent: 3138206 (1964-06-01), Bruce et al.
patent: 3244232 (1966-04-01), Myers
patent: 4509604 (1985-04-01), Upchurch

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