Prevailing temperature at test site.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards
Actual room temperature in the test lab with no residual heat remaining in test specimens from previous thermal tests.
Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards
Temperature of the surroundings..
Source: IADC UBO / MPD Glossary, December 2011. Global Standards