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Glossary of Terms - H

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

HADES™ Sondex High Temperature toolstring.
Hall Effect sensor A semiconductor magnetic sensor used in flowmeters.
Head Tension The cable tension measured at the tool top (head).
Head Tension CCL Combination (HTC) A combination tool, containing both a CCL and an HTU.
Head Tension Unit (HTU) A device for measuring head tension.
 Heavy Phase In a mixture, the heavy phase has the highest density. In oil/water, water is the heavy phase. In gas/water, water is the heavy phase. In gas/oil, oil is the heavy phase.  
Heptacable A 7-conductor armoured logging cable used for SRO logging.
Hot Work Any process that generates flames, sparks or heat.
Housing A cylindrical metal casing designed to protect downhole electrical circuitry, particularly from pressure, heat and moisture.
Hydrocarbon A compound containing only the elements hydrogen and carbon. May exist as a solid, a liquid or a gas. The term is mainly used in a catch-all sense for oil, gas and condensate.