Patent ID: 9121255
Filing Date: 2015-09-01
Classification: E21B

Abstract:
1. A stage tool for wellbore annular cementing, comprising: a main body including a tubular wall with an outer surface and a longitudinal bore extending from a top end to a bottom end, the tubular wall including a first tubular and a second tubular telescopically secured relative to and axially slidable along the first tubular; a fluid port through the tubular wall and, when opened, providing fluidic access between the longitudinal bore and the outer surface, the fluid port being openable when the first tubular and the second tubular are in a first overlapping position, wherein the first tubular and the second tubular are overlapped along a first overlapping length, and being closed by axially sliding the first tubular and the second tubular into a further overlapping position with a second overlapping length that is greater than the first overlapping length; and a sliding sleeve valve positioned over the port and drivable by fluid pressure from a position sealing against fluid flow out of the tool from the fluid port and a position retracted from the fluid port to permit fluid flow out of the tool from the fluid port.