Thread Protector 2 : Plastic or metal storage couplings that are screwed onto a stored tubing string, protecting the threads from impact and sometimes corrosion
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}