US 12,264,553 B2
Stage tools, stage tool assemblies, cementing operations, and related methods of use
David Dyck, Chestermere (CA)
Assigned to 2,458,584 ALBERTA LTD., Chestermere (CA)
Filed by 2458584 ALBERTA LTD., Chestermere (CA)
Filed on Oct. 13, 2022, as Appl. No. 17/965,515.
Claims priority of application No. 3158008 (CA), filed on May 6, 2022.
Prior Publication US 2023/0358114 A1, Nov. 9, 2023
Int. Cl. E21B 33/14 (2006.01)
CPC E21B 33/146 (2013.01) 22 Claims
OG exemplary drawing
 
1. A stage tool assembly comprising:
a tubular body defining an interior bore with a port, the tubular body having a top threaded casing connection and a bottom threaded casing connection;
an opening sleeve axially movable from a first position that restricts the port to a second position that exposes the port;
a closing sleeve axially movable from a first position that exposes the port to a second position that restricts the port; and
an isolation assembly downhole of the port and uphole of the bottom threaded casing connection, that, at least when in an activated mode:
opens to permit flow and tool passage in a downhole direction through the interior bore; and
closes to restrict flow through the interior bore.