Methods and apparatus for determining the position of an...

Details Methods and apparatus for determining the position of an... Methods and apparatus for determining the position of an...

2004-10-12

2008-12-30

Williams, Hezron (Department: 2856)

Measuring and testing

With fluid pressure

C073S049100, C073S037500

Reexamination Certificate

active

07469573

ABSTRACT:
A method of determining the position of a blockage (192, 392) in a passage (15, 313) having a first end and a second end. The method comprises blowing a sealing device (200) into the passage to form a seal adjacent the blockage (192, 392), then blowing a gas into the passage from the first end, making at least one measurement concerning the gas blown into the passage from the first end and determining a distance D between the first end and the sealing device using the at least one measurement.

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