Patent ID: 7624803

Claim:
An injection apparatus for injecting an activated fluid into a well-bore, the apparatus comprising a reservoir for containing an activation fluid (AF), wherein the injection apparatus further comprises: a valve arrangement adapted to be coupled to a pipe for receiving a first fluid (F 1 ) flow, a dosing and mixing arrangement coupled to the reservoir and to the valve arrangement, and wherein: the valve arrangement has a rest configuration in which the injection apparatus provides a non-activated fluid mixture (F 1 ″) and an activated configuration in which the injection apparatus provides an activated fluid mixture (F 2 ), the dosing and mixing arrangement comprising an engine part mechanically coupled to a pumping part, the engine part running the pumping part and the pumping part sucking the activation fluid (AF) of the reservoir when the valve arrangement is in the activated configuration, and the dosing and mixing arrangement mixes the activation fluid (AF) with the first fluid and provides an activated fluid mixture flow (F 2 ) at an outlet the valve arrangement is coupled to the outlet by a second shunt tube and the valve arrangement further has a by-pass configuration in which a second portion (F 1 ″) of the first fluid flows directly to the outlet, and wherein the activating steps are remotely controlled from a surface equipment.