STAGE TOOL FOR WELLBORE CEMENTING

摘要

A stage tool for wellbore annular cementing may be opened for cementing by hydraulic actuation of a sliding sleeve valve from over a fluid port. After sufficient cement has been introduced, the stage tool fluid port can be closed by compressing two telescopically arranged parts of its tubular body to further overlap each other and overlie the fluid port. This permits the stage tool to be closed without employing a plug.

主权项

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 with the first tubular and the second tubular are a first overlapping position and being closed by axially sliding the first tubular and the second tubular into a further overlapping position relative to the first overlapping position; 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.