Schlumberger Technology Corporation

Hidetoshi Yoshiuchi

Tsutomu Yamate

Oliver Clinton Mullins

Li Jiang

Kentaro Indo

Nathan Scott Lawrence

Go Fujisawa

Andrew Meredith

Kazuhiko Matsumoto

Noriyuki Matsumoto

Jimmy Lawrence

Michael M Toribio

John J Ullo

Tim G J Jones

A gas separation and detection tool for performing in situ analysis of borehole fluid is described. The tool comprises a sampling chamber for a downhole fluid. The sample chamber comprises a detector cell with an opening. The tool also comprises a gas separation module for taking a gas from the downhole fluid. The gas separation module comprises a membrane located in the opening, a support for holding the membrane, and a sealant applied between the housing and the membrane or support. Moreover, the tool comprises a gas detector for sensing the gas.

Detecting gas compounds for downhole fluid analysis

Subterranean sensing devices configured or designed for downhole use to sense a local condition in the well. The sensing devices comprise one or more transistor having at least one carbon nanotube field effect transistor (CNT FET) configured or designed for operation downhole, within a borehole.

Downhole sensing system using carbon nanotube FET

Growing community of inventors

Fujisawa, Japan

Hidetoshi Yoshiuchi