to push out the friction reducing agents stored in the annular chamber 29 the friction reducers are thus dispensed through injection ports 28 into the annular space defined between an interior of the screen and the exterior of the tubing in addition to pressure activation the activation of the canister may also be accomplished by mechanical means activation by mechanical means may be used to release the friction reducing agent in response to increased pressure and in response to other conditions such as increase fluid flow rate as shown in fig7 a mechanical device may generate a mechanical force to push against the opening 73 of the poppet valve the mechanical means for example may be a shifting tool arranged on the inside lumen of the tool the shifting tool may be pulled or pushed to activate the canisters the use of a shifting tool to activate a device downhole is well known in the art fig9 shows a schematic illustrating one embodiment of a mechanical means that can be used to control the activation of a canister of the invention as shown a stopping mechanism 91 prevents the piston 93 from sliding to the right the piston 93 is biased to move to the right in this illustration by a biasing spring 92 or a similar mechanism if a shifting tool or other device is used to release the stopping mechanism 91 the free floating piston.