Patent ID: 9121254
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 and being positioned in a wellbore; a means for sealing against inner walls of said wellbore, the sealing means being positioned around the mandrel; a plurality of ring members; comprising 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; and a plurality of slip means for extending radially outward and engaging said inner walls of said wellbore, 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, wherein each slip means is comprised of an outer surface with teeth pointed outward from said mandrel and an inner surface with a tapered portion and a planar portion, each slip means having an attached position and a deployed position, said teeth being parallel to said planar portion, wherein said first cone assembly has a single radiused surface in contact with said first slip means at a first connection between said tapered portion and said planar portion of said first slip means, and wherein said second cone assembly has a single radiused surface in contact with said second slip means at a second connection between said tapered portion and said planar portion of said second slip means, wherein said first cone assembly fits within said first slip means, and wherein said second cone assembly fits within said second slip means, wherein pressure of said single radiused surface of said first cone assembly against said first slip means extends said first slip means radially outward from said attached position to said deployed position, when pressures perpendicular to the single radiused surfaces of the first cone assembly are exerted on the first connection between the tapered portion and the planar portion of the first slip means, and wherein pressure of said single radiused surface of said second cone assembly against said second slip means extends said second slip means radially outward from said attached position to said deployed position, when pressures perpendicular to the single radiused surfaces of the first cone assembly are exerted on the first connection between the tapered portion and the planar portion of the first slip means.