Method and apparatus for improved measurement of tension and compression in a wireline

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United States of America Patent

PATENT NO 6343515
SERIAL NO

09476861

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A tension measuring device including an elongated body having two ends and a deflection block secured to each end of the elongated body for holding a line spaced apart from the elongated body. The deflection blocks are positioned equidistant from a center of the elongated body. A clamping mechanism between the deflection blocks clamps the line to the elongated body wherein increased tension in the line will bend the elongated body. A strain gage element is connected to the elongated body for producing an output signal proportional to the bending of the elongated body. The strain gage element is positioned on the elongated body and is applied directly to the bending of the elongated body. A linearizing signal device is connected to the strain gage element for processing the output signal and for providing a readable output representative of the tension on the line. The linearizing signal device provides for linearization of the output signal from the strain gage element and is, for example, a capacitive circuit or a linear signal processor. A line tension readout device is adapted to receive and display the readable output representative of the tension of the line.

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Patent Owner(s)

Patent OwnerAddress
VARCO INTERNATIONAL INCHOUSTON TX

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dodson, Steve W Logo Vista, TX 1 16

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