Oil & Gas Well Servicing With A Commitment To Quality & Safety

4J Well Service, Inc. was founded in 1998 by John D. Moser, and has been providing well service rigs to the Williston Basin areas of Montana, North Dakota, and South Dakota for the past 20 years. John had spent the previous 26 years working for well service companies, mostly Eastern Well Service, that serviced the Anticline areas of Eastern Montana. When Eastern Well Service went out of business in 1997, John had the opportunity to purchase the rig he had supervised.

4J Well Service provides our clients with a safe, efficient, and reliable service, to provide our employees with a safe and stable work environment, and to give back to the communities we live and work. We are still a family owned and operated business, and our family is actively involved in the daily operations.

Our services include a wide range of oil and gas well service equipment including workover rigs and support equipment, vacuum trucks, pressure (kill) trucks, winch trucks, and haul trucks.