Weatherford Technology Holdings, LLC

Vanguard Completions Ltd.

Weatherford/lamb, Inc.

Jozeph Robert Marcin

Andrew James Hanson

Randal Brent Biedermann

Francis Ian Waterhouse

Christopher D Palmer

James Frederick Wilkin

Clayton R Andersen

Damian Leonard Ward

Corey M Kshyk

Branko Calic

Randal Brent Biedemann

Bryce McNabb

James MacTavish

Corey Kshyk

Downhole drop plugs, frac sleeves, and downhole plug-operated valves. The drop plugs may incorporate a ring part and a rod part. The valves may incorporate a bypass to accommodate material that gets stuck in the valve on flowback. The valves may incorporate a compound seat that passes a first ball of a first size and seats a second ball of the first size. Locking seats, dissolvable balls, and dissolvable mandrels are illustrated and discussed as well.

Downhole drop plugs, downhole valves, frac tools, and related methods of use

A stage tool includes an isolation mechanism for isolating the lower bore of a completion string. The isolation mechanism is initially in a deactivated configuration until sufficient hydraulic pressure is applied, at which time, the isolating mechanism is activated to isolate the lower bore from cement ingress. Concurrently or subsequently, a stage tool may be opened to facilitate cementing of an annulus between the completion string and the wellbore. After cementing, the isolation mechanism, or portions thereof, may be drilled out to re-establish flow through the stage tool.

Stage tool with lower tubing isolation

A method and apparatus for conducting a reverse flow operation. The apparatus may be lowered into a wellbore on a work string, and includes an opening device, a closing device, and a locking device disposed in a housing. Pressurized fluid supplied through the work string may actuate the opening device to open fluid flow through ports in the housing. Pressurized fluid from the annulus may be supplied through the port in the reverse flow direction to actuate the locking device to enable fluid flow up through the work string back to the surface, and to release the closing device. Pressurized fluid supplied through the work string may actuate the closing device to close fluid flow through the ports in the housing.

Reverse cementing valve

Growing community of inventors

Spruce Grove, Canada

Jozeph Robert Marcin