Method and apparatus for formation testing

Details Method and apparatus for formation testing Method and apparatus for formation testing

1989-04-10

1990-07-17

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

166254, F21B 4908

Patent

active

049413503

ABSTRACT:
Apparatus and method are disclosed for testing and sampling fluid in an oblong borehole of fracture zones in the area maximum permeability for more efficient recovery and testing in a given sampling period. The tester includes a pair of oppositely extending arms urged against the sides of the borehole causing the tester to rotate until a sampling probe oriented 90.degree. from the arms aligns with the short axis of the borehole. A probe is also disclosed having an elongate slot oriented perpendicular to the borehole for covering a greater horizontal sampling area.

REFERENCES:
patent: 3173485 (1965-03-01), Bretzke, Jr.
patent: 3261402 (1966-07-01), Whitten
patent: 4470456 (1984-09-01), Moutray, III
Schlumberger workbook entitled "Open Hole Repeat Formation Tester `RFT`", compiled by: E. Havard, (Spring, 1982), cover and pp. 1-1 to 1-5.
Western Atlas International, Atlas Wireline Services Workbook entitled "Formation Multi-Tester (FMT) Principles, Theory, and Interpretation", 1987 (author unknown), cover and title page and pp. 1-7.
Schlumberger specification sheet entitled "Cased Hole Repeat Formation Tester", 2 pgs. (author and date unknown).

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