High Plains Inc is a Wireline company that has been in business for over 30 years serving the following areas: North Dakota, ... South Dakota, Montana and Wyoming. HPI is based out of 5 locations: Dickinson, ND, Williston, ND, Watford City, ND Gillette, WY, and Casper, WY. We specialize in Pumpdown Plug and Shoot perforating operations, Cased hole services including casing inspections and radial bond logs and other standard cased hole services. read more