Millable bridge plug system

A millable bridge plug system, comprising:

• a mandrel;
• a sealing means positioned around the mandrel;
• 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, wherein said upper end of said sealing means has a double radiused surface in contact with said first ring member, and wherein said lower end of said sealing means has a double radiused surface in contact with said second ring member;
• 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 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.

A method of installing a millable bridge plug system, comprising the steps of:

• placing a bridge plug in a wellbore, said wellbore having inner walls surrounding said bridge plug, said bridge plug comprising:
• a mandrel having an upper portion and a lower portion;
• a sealing means positioned around the mandrel;
• 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, wherein said upper end of said sealing means has a first means for resisting pressure when in contact with said first ring member, and wherein said lower end of said sealing means has a second means for resisting pressure when in contact with said second ring member;
• 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, 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;
• forming a seal by exerting pressure on said bridge plug, said sealing member being compressed to radially extend outward to seal against said inner walls, said ring members pushing said sealing member to expand, said cone assemblies pushing said ring members;
• and
• locking said bridge plug within said wellbore by exerting pressure, said cone assemblies pushing said slip means to extend radially outward to fixedly engage said inner walls, said bridge plug being locked in position within said wellbore.