High-velocity jet and propellant fracture device for gas and oil

Details High-velocity jet and propellant fracture device for gas and oil High-velocity jet and propellant fracture device for gas and oil

1981-03-27

1983-07-05

Purser, Ernest R.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

Concave-shaped charge

166299, 102286, E21B 43117

Patent

active

043913377

ABSTRACT:
An integrated jet perforation and controlled propellant fracture device and method for enhancing production in oil or gas wells, wherein the device is inserted in a well bore to the level of a geological production structure; the fracturing device being constructed with a cylindrical housing of variable cross-section and wall-thickness with the housing filled with combustible propellant gas generating materials surrounding specially oriented and spaced shaped charges, having an abrasive material distributed within the propellant filled volume along the device length to produce enhanced perforations with attendant pressure-controlled gas and fluid injection into the perforations to produce controlled frac entry at point or points desired in the producing zones of the well bore, wherein a high velocity jet penetrates the production zone of the well bore initiating fractures, and is simultaneously followed by a high pressure propellant material which amplifies and propagates the jet initiated fractures.

REFERENCES:
patent: 2785631 (1957-03-01), Blanchard
patent: 3713487 (1973-01-01), Lozanski
patent: 4253523 (1981-03-01), Ibsen
"A New Perspective on Well Shooting--The Behavior of Contained Explosives and Deflagrations", Schmidt et al., (Sandia 1979).
"Small Scale Experiments with an Analysis to Evaluate the Effect of Tailored Pulse Loading on Fracture and Permeability", McHugh et al., (DOE 1980).

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