... failure barrier failure Colorado barrier failure rate potential barrier failure Introduction The prevention of contamination of fresh water aquifers has been a prime concern in drilling operations since the inception of drilling. Surface casing has long been the primary barrier to prevent...

... For this study, there exist two types of barrier failures: potential barrier failures and catastrophic barrier failures. The definitions of these failures are as follows: Abstract The United States National Science Foundation has funded a Sustainability Research Network (SRN) focused on natural gas...