Use of flexible member for borehole diameter measurement

Details Use of flexible member for borehole diameter measurement Use of flexible member for borehole diameter measurement

2007-05-21

2011-12-13

Edwards, Jr., Timothy (Department: 2612)

Measuring and testing

Borehole or drilling

Downhole test

C175S050000, C376S249000, C702S006000

Reexamination Certificate

active

08074511

ABSTRACT:
The downhole tool disclosed herein comprises a body, a flexible member attached to the body, and a transducer housed in the body. The flexible member compresses against one side of the wellbore and urges the body against the other side. The transducer emits a signal to the flexible member reflectable from the flexible member back to the transducer. The signal travel time from the transducer to the flexible member and back is analyzed for estimating the distance between the body and the flexible member. The standoff distance can be estimated from the distance between the body and the flexible member. From the standoff distance, the wellbore diameter is estimated. The tool may also obtain wellbore dimensions by obtaining near side wellbore standoff and using a magnetic ruler to determine bowspring flexing. The magnetic ruler results may be used in conjunction with or without the far side standoff data.

REFERENCES:
patent: 6618322 (2003-09-01), Georgi
patent: 6848189 (2005-02-01), Moake et al.
patent: 7069775 (2006-07-01), Fredette et al.
patent: 2006/0064889 (2006-03-01), Fredette et al.
patent: 2006/0070433 (2006-04-01), Fredette et al.

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