MILLABLE BRIDGE PLUG SYSTEM

摘要

A millable bridge plug system includes a mandrel, a sealing member, ring members, cone assemblies, and slip devices. The sealing member, ring members, cone assemblies and slip devices are positioned on and around the mandrel. Ring members abut against an upper end and a lower end of the sealing member. The other sides of the ring members abut against the cone assemblies, and the cone assemblies engage respective slip devices. The cone assemblies have surface interfaces contacting each of the slip devices so that pressure from the cone assemblies is exerted according to contact along the surface interfaces. Each surface interface can have a curvature or be a single radiused surface. Coordination of the surface interfaces control pressure to insure improved fixed positioning in the wellbore.

主权项

1. A millable bridge plug system comprising:
a mandrel having an upper portion and a lower portion; a sealing means for inner walls of a borehole, the sealing means being 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; 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 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, wherein said first cone assembly has a first means for exerting pressure when in contact with said first slip means, and wherein said second cone assembly has a second means for exerting pressure when in contact with said second slip means.