Abstract: A debris barrier is installed and locked to the liner tieback extension. When it is time to check release from the liner before initiating a cement job the inner running string is lifted. The lock stays engaged to the liner tieback extension tube as the inner running string is lifted. In that manner the debris barrier remains in position during the lifting to determine release from the liner before cementing. After cementing, the inner running string is lifted further to eventually undermine the lock and capture the debris barrier to bring the debris barrier to the surface with the inner running string. The lock can be dogs or collets or the like. An inner sleeve or a lift sub with an upset can be the support whose axial movement beyond a predetermined value undermines the lock to release the debris barrier.

Abstract: A system for and method of supplying an injection fluid to a well assembly so that the injection fluid flows at a substantially constant flow rate. The fluid can be injected at a single site in the well assembly or multiple sites. A flow control regulator is included that attaches to the well assembly and provides a self adjusting flow control for the fluid being injected. The regulator includes a slidable floating sleeve having an orifice through which the fluid flows. The sleeve includes an inlet port that can register with a fluid supply port to allow the injection fluid to make its way into the sleeve. The fluid exits the sleeve through the orifice to generate a pressure differential across the orifice that in turn exerts a sliding force onto the sleeve. Moving the sleeve misaligns the inlet port and fluid supply port thereby throttling flow through the regulator to a predetermined flow rate.