Patent ID: 9010447
Filing Date: 2015-04-21
Classification: E21B

Abstract:
1. A sliding sleeve sub for installation in a wellbore tubular string, the sliding sleeve sub comprising: a tubular including an inner bore defined by an inner wall; and a sleeve installed in the tubular inner bore and axially slidable therein at least from a first position to a second position, the sleeve including an inner diameter, an outer diameter facing the tubular inner wall, a driver for the sleeve selected to be acted upon by a first inner bore conveyed actuating device passing adjacent thereto to drive generation on the sleeve of a ball stop, the ball stop protruding into the inner diameter to retain and hold a second inner bore conveyed actuating device passing along the inner bore and to position the second inner bore conveyed actuating device to form a seal against fluid flow therepast, the driver being driveable to create the ball stop without axial sliding of the sleeve.