A graph that is formed by two intersecting lines: a horizontal, or "X," axis and a vertical, or "Y," axis.
A control chart used to plot the average of the values taken from a sample group.
Imaging the internal structure of a core or a weld by passing X-rays through it onto film or a detector.
A technique identifying and semi-quantifying the minerals in a rock from the diffraction peaks its crystal lattices produce in an X-ray beam.
Elemental analysis by measuring the characteristic X-rays a sample re-emits when irradiated, abbreviated XRF.
The out-of-phase, reactive component of an induction tool's received signal, used with the in-phase signal to correct skin effect and sharpen resolution.
A biopolymer giving drilling and completion fluids shear-thinning viscosity.
A biopolymer produced by fermentation with Xanthomonas campestris, used to viscosify fluids at low shear, also called XC polymer.
Xanthan gum — the bacterial polysaccharide used to give low-shear viscosity in drilling and completion fluids.
Examine if Closed. The PLC instruction that makes its portion of the ladder rung true if there is a voltage on that address's input terminal. Also known as Examine On.
Examine if Open. The PLC instruction that makes its portion of the ladder rung true if there is not a voltage on that address's input terminal. Also known as Examine Off.
A shorthand designation for the EXCLUSIVE NOR gate.
A shorthand designation for the EXCLUSIVE OR gate.
An aromatic hydrocarbon, C6H4(CH3)2, existing as ortho, meta and para isomers according to where the two methyl groups sit.
