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A caliper log is a well logging tool that provides a continuous measurement of the size and shape of a borehole along its depth [1] and is commonly used in hydrocarbon exploration. The measurements that are recorded can be an important indicator of wash-outs, cave ins or shale swelling in the borehole, which can affect the results of other well ...
Caliper is the American spelling, while calliper (double "L") is the British spelling. A single tool might be referred to as a caliper or as calipers — a plural only (plurale tantum) form, like scissors or glasses. Colloquially, the phrase "pair of verniers" or just "vernier" might refer to a vernier caliper.
Caliper is also a consulting and R&D provider offering professional services in quantitative management consulting, transportation, and decision support systems development. Caliper is the developer of the TransCAD transportation planning software, TransModeler traffic simulation software, and Maptitude [ 1 ] GIS packages.
The diameter of an object measured with a caliper is sometimes called the caliper diameter; it is the same as Feret diameter. Feret diameter applied to a projection of a 3D object. The Feret diameter or Feret's diameter is a measure of an object's size along a specified direction. In general, it can be defined as the distance between the two ...
The Graphos technical pen introduced in 1934 miniaturized the caliper principle and made the points easily interchangeable. The Sheaffer company produced an expensive drafting set which included such pens for use on linen prints. These sets were often presented to a draftsman upon completing 'time served', which marked the end of the ...
The standard for a caliper is usually a constant of 0.02 Vernier caliper scale with the normal 0.02 vernier constant, showing measurement of object at 19.44 mm to two decimal places The use of the vernier scale is shown on a vernier caliper which measures the internal and the external diameters of an object.
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