公开(公告)号：US10323482B2

公开(公告)日：2019-06-18

申请号：US15562832

申请日：2015-03-31

申请人： DRECO ENERGY SERVICES ULC

发明人： Graham Styler ,  Lewis Facca

IPC分类号： E21B34/08 ,  E21B34/10 ,  E21B34/12 ,  E21B33/129

摘要： A flow-actuated pressure equalization valve, for use with a downhole tool such as a treatment tool, for use in stimulating a subterranean formation. The equalization valve allows the pressure of treatment fluid above and below an isolation device to be equalized so the treatment tool can be moved. The valve can be closed when fluid flow exceeds a certain threshold and the treatment tool is set in the wellbore. While running in or pulling out of hole, the valve will not close regardless of the rate of fluid flow. The valve can be opened by stopping fluid flow and then bleeding off pressure above the isolation device, or by pulling up on the treatment tool.

公开(公告)号：US10280707B2

公开(公告)日：2019-05-07

申请号：US14681681

申请日：2015-04-08

申请人： Dreco Energy Services ULC

发明人： Graham Styler ,  Gavin MacMillan

IPC分类号： E21B34/10 ,  E21B34/14 ,  E21B43/12 ,  E21B43/25 ,  E21B34/06 ,  E21B34/00

摘要： A re-closable toe sleeve is disclosed where the toe sleeve has a port allowing fluid access from the interior of the toe sleeve to the exterior of the toe sleeve. A burst disk is placed inside the port to prevent fluid access from the interior of the toe sleeve to the exterior of the toe sleeve. However upon the fluid in the interior of the toe sleeve reaching a predetermined level the burst disk is removed or otherwise modified to allow fluid access through the port. A sliding sleeve is placed within the toe sleeve so that the sliding sleeve can be moved to cover the port thereby preventing fluid access from the interior of the toe sleeve to the exterior of the toe sleeve or the sliding sleeve may be moved to uncover the port thereby allowing fluid access from the interior of the toe sleeve to the exterior the toe sleeve. The sliding sleeve is mechanically moved from the surface and is typically run into the well in the open position such that the port is uncovered by the sliding sleeve.

公开(公告)号：US10544638B2

公开(公告)日：2020-01-28

申请号：US15735262

申请日：2016-06-10

申请人： DRECO ENERGY SERVICES ULC

发明人： Graham Styler

IPC分类号： E21B23/00 ,  E21B34/14 ,  E21B43/26

摘要： A multi-position tool for use at a downhole end of a conveyance string for operation in a casing string is provided. The tool comprises a mandrel connected to the conveyance string; an actuation housing slidably shiftable axially along the mandrel between an uphole position, at least one intermediate position and a downhole position; an uphole device operable between an activated position when the actuation housing is in the uphole position, and a deactivated position; and a downhole device operable between an activated position when the actuation housing is in the downhole position, and a deactivated position. Both the uphole and downhole devices are in their deactivated positions when the actuation housing is in the at least one intermediate position. The tool has a J-slot mechanism operable between the actuator housing and the mandrel for shifting the actuator housing between the uphole, at least one intermediate, and downhole positions.