Hydraulically-actuated propellant stimulation downhole tool

摘要

A hydraulically-actuated propellant stimulation of a downhole tool for use in hydrocarbon wells, which comprises a rupture disc that allows a predetermined pressure in the central bore of the tool to actuate a detonator assembly and, thereby, detonating a propellant volume.

主权项

1. A downhole tool comprising:
a detonation section for stimulating a hydrocarbon-producing formation, said detonation section comprising:
a first end;a second end;a propellant volume located proximate to said second end; anda wall having:
an inner surface defining a central bore extending from said first end to said second end;an outer surface wherein, during operation of said downhole tool, said outer surface is exposed to a well annulus;a rupture disc, andan actuating assembly comprising:
a detonator chamber having a first end positioned adjacent to said propellant volume and a second end having an inlet;a detonator assembly located within said detonator chamber proximate to said first end of said detonator chamber;a firing pin located within said detonation chamber, said firing pin retained proximate to said inlet until an actuating pressure is applied through said inlet; anda flow passage contained between said inner surface and said outer surface and in fluid flow communication with said detonation chamber through said inlet, wherein said rupture disc is positioned between said flow passage and said central bore such that it prevents fluid flow communication between said flow passage and said central bore until ruptured by the application of said actuating pressure in said central bore.