Method and apparatus for measuring formation pressure

Details Method and apparatus for measuring formation pressure Method and apparatus for measuring formation pressure

E - Fixed Constructions

21

B

E21B 47/14 (2006.01) E21B 28/00 (2006.01) E21B 47/06 (2006.01) E21B 49/10 (2006.01)

Patent

CA 2202328

An earth formation tool measures pressure from within a borehole. A portion of the borehole wall is isolated from surrounding borehole fluids by placing a chamber of a borehole tool against the borehole wall. The chamber comprises a recess in an exterior surface of a borehole tool. Mudcake present on the isolated portion of the borehole wall is disintegrated by an ultrasonic transducer within the chamber. In this manner, there is no resistance to fluid flow from the chamber to the formation. A pressure gauge measures pressure of the chamber to indicate pressure of the earth formation. This approach can be used to make moving or stationary measurements of earth formation pressure.

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