Patent ID: 7832476
Filing Date: 2010-11-16
Classification: C09K,E21B

Abstract:
1. A method of introducing friction reducing agents within a wellbore penetrating a subterranean formation during a gravel packing operation, the method comprising: a squeeze operation; a circulating operation comprising circulating a gravel packing fluid introduced from the surface through a length of tubing located downhole within the wellbore, at least a portion of the tubing being surrounded by a screen to screen out particulate matter during the gravel packing operation, wherein an annular space is defined between an interior of the screen and the exterior of the tubing; a reverse circulating operation; providing a friction reducing agent dispensing apparatus that locates downhole with the tubing comprising: activating the trigger mechanism to actuate the piston so that the friction reducing agent is dispensed through the one or more outlets at a position downhole remote from the surface during the circulating operation to reduce friction pressure.