Throw the Chain 2 : to jump the spinning chain from the box end of the joint to the pin end of the joint after the connection has been stabbed. The chain is pulled by a rope from the cat-head to tighten the joint
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}