Patent ID: 8807211
Filing Date: 2014-08-19
Classification: E21B

Abstract:
1. A shutoff tool for being entered into a well bore and shutting off openings or leaks, said shutoff tool comprising: one or more enclosures prepared for comprising a sealant, said sealant being capable of shutting off openings or leaks when cured, an outer inflatable bladder arranged outside and covering said one or more enclosures, said outer inflatable bladder is configured to rupture when a volume of sealant within an unsupported section of the outer inflatable bladder is increased, wherein a ruptured section of said outer inflatable bladder provides access from said one or more enclosures to an outside of said outer inflatable bladder, an inner inflatable bladder arranged inside the outer inflatable bladder such that said one or more enclosures will be arranged between the outer inflatable bladder and the inner inflatable bladder, such that when inflated said inner inflatable bladder can exert a pressure on said one or more enclosures, a core arranged inside said inner inflatable bladder, and prepared for supplying a pressurized fluid into said inner inflatable bladder, wherein the core comprises at least one fluid passage for providing a path for pumping sealant into said one or more enclosures.