Over-pressured well fracturing method

Wells – Processes – Placing fluid into the formation

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166313, E21B 4326

Patent

active

053701879

ABSTRACT:
Hydraulic fractures are initiated or extended into earth formations from a first well by filling a space within the wellbore and a tubing string extending within the well with a fracturing fluid, placing the first well in fluid flow communication with a tubing string extending within a second well and increasing the pressure of fluid in the respective tubing strings sufficient to initiate or extend the fracture. The second well serves as an accumulator for accumulating a sufficient charge of pressure fluid, such as gas, to drive the fracturing fluid in the first well into the formation to a suitable extent.

REFERENCES:
patent: 2875833 (1959-03-01), Martin
patent: 4501326 (1985-02-01), Edmunds
patent: 5131472 (1992-07-01), Dees et al.
patent: 5271465 (1993-12-01), Schmidt et al.

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