Method and apparatus for subsurface fluid sampling

(21) Application number (22) In day (24) Running day (41) Aim. avail.

2003.06.27

2003.06.27

2003.12.29 (86) Int. Entry date and application number (85) Date of transfer (30) Priority 2002.06.28, US, 184833 (71) Applicant (72) Inventor (74) Proxy

Schlumberger Technology BV, Parkstraat 83-89, NL-2514 JG The Hague, NL Bunker M Hill, Sugar Land, TX 77479, US Alexander Zazovsky, Houston, TX 77056, US Bryn Aarflot AS, 0104 Oslo (54)

Method and apparatus for fluid sampling under the surface (57) Summary

There is disclosed a device and method for extracting fluid from a subterranean formation. A downhole sampling tool is provided with a probe having an inner wall capable of selectively deflecting viral fluids into one or more viral fluid channels for sampling, while contaminated fluids are diverted into one or more contaminated fluid disposal channels for disposal. Characteristics of the fluid passing through the channels of the probe can also be measured using techniques such as optical density to evaluate various fluid parameters, such as levels of contamination. The data generated during sampling can be sent to a controller capable of generating data, to communicate and / or to send command signals. The flow of fluid into the downhole tool may be selective