Defining Perforating. Date: 08/30/2013. Perforatingâthe act of blasting holes through steel casing, cement, and formation rockâlasts only an instant, but the long-term viability of most oil and gas assets depends upon it. The technique involves carrying explosive charges downhole, where they are detonated to create tunnels that act as conduits through which reservoir fluids flow from the formation into the wellbore and up to the surface.
According to recent data compiled by the Insurance Information Institute, the average cost of comprehensive insurance in the U.S. runs around $136 per year, with a high of $266 per year in the District of Columbia, and a low of $97 per annum in Oregon.
Comprehensive insurance is an optional coverage that will pay for the cost of repairs up to a total loss, in which case Liberty Mutual will give you the cash value of the vehicle. While there are similarities between collision coverage and comprehensive coverage, here are the details of both: