Why Winch Trucks Are the Key to A Profitable Oil Field Business? - Winch trucks perform a comprehensive role in the oil field business. A Winch truck consists of a spool-wounded cable which is used in lifting and pulling heavy objects and equipment. They come in a variety of sizes from smaller alternatives to heavier or industrial alternatives. The services of winch trucks are provided by various top oil field servicing companies across the United States, especially in Texas.