Abstract: A method of consolidating an incompetent particulate in a subterranean formation penetrated by a wellbore accomplished by introducing fluids to be injected into a wellbore into coiled tubing while the tubing is outside the wellbore and thereafter pumping the fluids from the coiled tubing into the wellbore after circulating ports open in a firing head in response to initiation of the variable delay firing head for ignition of a gas generator.

Abstract: A low actuation pressure bar vent for use in a tool string having low pressure therein. The vent includes a body portion and a piston slidingly disposed in the body. The piston and body define a first cavity therebetween and a second cavity therebetween, spaced from the first cavity. The body further defines a plurality of transverse ports therethrough providing communication between a body central opening and a well annulus. When in a closed position, the piston sealingly closes the ports. In a first embodiment, the first cavity has a spring disposed therein. The body also defines a second plurality of ports therein providing fluid communication between the first cavity and the well annulus. Pressure in the well annulus and the spring bias the piston toward an open position uncovering the ports. In an alternate embodiment, a pressurized gas biases the piston. The second cavity is filled with a fluid such that movement of the piston is prevented.