Vitisak Payalaw and his crew were working on an oil rig 135 miles off the southern coast of Thailand on Friday when they spotted something unexpectedly bobbing in the gentle waves. It was a dog. The animal was fighting his way through the moving water, heading for the oil rig. As he approached the structure, Payalaw, an offshore planner for Chevron Thailand Exploration and Production, held out a pole after the animal had splashed his way to the platform below the rig’s deck. As a video Payalaw posted to his Facebook account shows, the pup was soaked, shivering and too...