Roy Igo, Sr. started working in the oil fields of Oklahoma and Texas in 1916. He was joined by son, Roy Igo, Jr., in the early 1930's. Together they "rough necked," drilled, pushed tools, and eventually became drilling superintendents for various petroleum companies.

In 1953, Roy Jr., his wife Dorothy and young sons, Ronald and Gary, moved to Bogota Colombia, South America. Roy supervised the drilling and completion of the first oil and gas wells in Colombia. They all returned to the USA in 1957.

Roy Sr. and Roy Jr. started General Oilfield Service located in Roundup, Montana in 1957. They started out with a truck mounted single drum - single pole well service work-over rig. In the 1960's Ronald and Gary joined the family business working as rig crew members. With no power tubing or rod tongs they carried on the hard working tradition of the "roughneck."

In 1965 the company moved to Sterling, Colorado. While in Colorado, the Igos continued the work-over rig services and kept setting the standard for hard work.

In 1968, the Belle Creek Oil boom was in full swing. The family moved its operation to Biddle, Montana, and jumped in with both feet. During this time hot oil units and vacuum trucks were added to complement their services. The business name was changed to Igo Oil Well Service, Inc.