Downhole gas detection in drilling muds

Details Downhole gas detection in drilling muds Downhole gas detection in drilling muds

2007-08-13

2010-10-19

Fitzgerald, John (Department: 2856)

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

Reexamination Certificate

active

07814782

ABSTRACT:
Apparatus and method are disclosed for detecting gas in return fluids. A semi-permeable interface is disposed on a tool sub, the semi-permeable interface being in communication with a fluid cell and with a return fluid in an annular region defined by an outside the tool sub and a borehole wall. A sensor responsive to a gas carried by the return fluid is disposed in the fluid cell to sense the gas that enters the fluid cell from the return fluid via the semi-permeable interface.

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Brumboiu, A.O. et al., “Application of Semipermeable Membrane Technology in the Measurement of Hydrocarbon Gases in Drilling Fluids,” 2000 SPE/AAPG Western Regional Meeting, Jun. 19-23, 2000, pp. 1-12, Long Beach, California.

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