Well Intervention Services is a Tool Rental and Services Company, dynamic, innovative on a wide resource involved in provide optimal solutions for the Oil & Gas industry. WIS specializes in providing solutions for well interventions and open & cased hole completions, such as: Well Intervention. – Through a wide range of services in conjunction with the experience of our personnel; we can extend the life of your wells by optimizing their production with the use of the latest technology in completions, remedial, thru-tubing, fishing and more.