Patent ID: 9121253
Filing Date: 2015-09-01
Classification: E21B

Abstract:
1. A millable bridge plug system comprising: a mandrel having an upper portion and a lower portion; a shearing means attached at said upper portion of said mandrel; a sealing means positioned around the mandrel between said upper portion and said lower portion; a plurality of ring members, a first ring member adjacent an upper end of said sealing means and a second ring member adjacent a lower end of said sealing means; a plurality of cone assemblies, a first cone assembly proximate to said first ring member and a second cone assembly proximate to said second ring member, said first ring member being between said first cone assembly and said sealing means, said second ring member being between said second cone assembly and said sealing means; a plurality of slip means for extending radially outward and engaging an inner surface of a surrounding borehole, a first slip means mounted around said mandrel and engaging said first cone assembly and a second slip means mounted around said mandrel and engaging said second cone assembly; and a cap means attached at said lower portion of said mandrel, wherein said shearing means comprises a shaft member and a top locking ring, said shaft member being fixedly engaged within said top locking ring, and wherein said cap means comprises a bottom locking ring.