Schlumberger Technology Corporation

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Tamim Sawaf

Robert W Tennent

Ryan Parasram

Koichi Naito

Adolfo Recio

Hugues Bouvier

Scott C Cook

Scott Cook

A method includes receiving a request to supply power of a first type to a toolstring. The toolstring includes a first tool that operates using the power of the first type and a second tool that operates using power of a second type. The method also includes receiving an indication of a relay configuration relating to relay positions of relays of a switching circuit in the toolstring. The relay configuration enables the switching circuit to selectively supply the power of the first type or the power of the second type to the toolstring via a switching communication system. The method further includes, when the relay configuration does not enable the switching circuit to supply the power of the first type, sending a first command to the switching communication system to change the relay configuration to enable the switching circuit to supply the power of the first type.

AC/DC downhole power switch using switching communication system

Methods and related apparatus pertaining to downhole and surface telemetry, such as a method in which a telemetry system is provided with a communication path formed with an electrically conductive transport medium coupled across a plurality of downhole nodes. Such method includes operating on the communication path with a multi-drop system that provides telemetry to the downhole nodes in a wellbore, including employing modulation in a master-slave arrangement using binary differential phase shift keying or differential quadrature phase shift keying.

Telemetry system and method of operating the same

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Houston, TX, United States of America

Tamim Sawaf