Back to results
US 8,939,039 B2Granted
Load cell for a downhole load measuring tool
AssigneeSondex Wireline Limited
InventorsJames David Ratcliffe, Timothy Gill
Life of this patent
Estimating the term…
Abstract
A load cell for a downhole load measuring tool is provided. The load cell comprises a plurality of strain gauges arranged in a balanced array, wherein the array of strain gauges is provided in fluid which, in use, is at substantially the same pressure as the surrounding downhole fluid.
Claims18
A load cell for a downhole load measuring tool, the load cell comprising:
- a plurality of shear strain gauges arranged in a balanced array, wherein the balanced array of shear strain gauges is provided in fluid which, in use, is at substantially the same pressure as the surrounding downhole fluid;
- and
- a pressure compensator configured to apply hydrostatic strain to the balanced array, and when subjected to such strain, the balanced array is configured such that each shear strain gauge of the balanced array is uniformly strained.
A downhole load measuring tool comprising:
- a load cell, the load cell comprising:
- a plurality of shear strain gauges arranged in a balanced array, wherein the array of shear strain gauges is provided in fluid which, in use, is at substantially the same pressure as the surrounding downhole fluid;
- and
- a pressure compensator configured to apply hydrostatic strain to the balanced array, and when subjected to such strain, the balanced array is configured such that each shear strain gauge of the balanced array is uniformly strained.
1 more element
Dependencies are inferred from the claim text.