Patent ID: 7665534
Filing Date: 2010-02-23
Classification: E21B

Abstract:
1. A zone isolation assembly for a subsurface well that extends downward from a surface region, the subsurface well including (i) a first fluid inlet structure that at least partially defines a first zone that receives a first fluid, and (ii) a second zone that is nearer to the surface region than the first zone, the zone isolation assembly comprising: a fixed docking receiver that is coupled to the first fluid inlet structure, the docking receiver at least partially defining the first zone; and a docking apparatus that is selectively moved relative to the docking receiver between (i) a disengaged position wherein the first zone is in fluid communication with the second zone, and (ii) an engaged position wherein the docking apparatus engages the docking receiver so that the first zone is not substantially in fluid communication with the second zone, the docking apparatus including an O-ring that forms a substantially fluid-tight seal with the docking receiver when the docking apparatus is in the engaged position, the docking apparatus being maintained in the engaged position substantially by the force of gravity.