Weatherford Technology Holdings, LLC

Weatherford U.k. Limited

Petrowell Limited

Ian Jaffrey

Richard Lee Giroux

Daniel George Purkis

Stephen Reid

Richard Dalzell

Jason Duthie

Matthew Manning

Damien Gerard Patton

Oliver Webster

A downhole apparatus comprises a piston mounted within a bore and being reconfigurable from a lock configuration to an unlock configuration in response to a pressure sequence applied within the bore. When the piston is in its lock configuration, a lock is supported by the piston such that the lock partially extends into the bore and engages a lock profile of the piston to restrict movement of the piston in a first direction towards its unlock configuration. In response to a first event of the pressure sequence, the piston is moveable in a second direction to desupport the lock and permit the lock to be wholly received into the bore and allow the piston to move in the second direction towards its unlock configuration in response to a subsequent event of the pressure sequence.

Pressure operated apparatus and method

A liner deployment assembly (LDA) for use in a wellbore includes: a crossover tool. The crossover tool includes: a seal for engaging a tubular string cemented into the wellbore; a tubular housing carrying the seal and having bypass ports straddling the seal; a mandrel having a bore therethrough and a port in fluid communication with the mandrel bore, the mandrel movable relative to the housing between a bore position where the mandrel port is isolated from the bypass ports and a bypass position where the mandrel port is aligned with one of the bypass ports; a bypass chamber formed between the housing and the mandrel and extending above and below the seal; and a control module. The control module includes: an electronics package; and an actuator in communication with the electronics package and operable to move the mandrel between the positions.

Telemetry operated tools for cementing a liner string

A downhole shifting tool () for shifting a downhole component () comprises a body with a positioning arrangement () provided on the body for engaging or interacting with a downhole component to provide alignment of the shifting tool with said component. The tool further includes a connecting member () provided on the body and being moveable to selectively engage a connection profile of the downhole component.

Shifting tool

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Aberdeenshire, United Kingdom

Ian Jaffrey