Patent Number: 7,100,689

Title: Sensor apparatus and method of using same

Abstract: The invention relates to a system and method for sensing the characteristics of a fluid in a sub-surface formation. In one embodiment, the invention relates to a sensor apparatus for sensing a chemical in a vapor emitted by a sub-surface fluid sample. In various configurations, the apparatus senses the presence and/or percentage of water, the presence of a gas, an oil/gas ratio, an aliphatic/aromatic hydrocarbon ratio, and/or the presence of corrosive or poisonous chemicals.

Inventors: Williams; John R. (Lexington, MA), Sebelius; Peter W. (Chelmsford, MA), Parry; Joel R. (Jamaica Plain, MA), Coskren; William D. (North Reading, MA)

Assignee: The Charles Stark Draper Laboratory Inc.

International Classification: E21B 47/00 (20060101); E21B 49/08 (20060101)

Expiration Date: 9/05/02018