| 摘要 |
<p>A millable bridge plug system (100) includes a mandrel (112), a sealing member (114), ring members (116, 118), cone assemblies (120, 122), and slip devices (124, 126). The sealing member (114), ring members (116, 118), cone assemblies (120, 122) and slip devices (124, 126) are positioned on and around the mandrel (1 12). Ring members (116, 118) abut against an upper end and a lower end of the sealing member (114). The other sides of the ring members (116, 118) abut against the cone assemblies (120, 122), and the cone assemblies (120, 122) engage respective slip devices (124, 126). The cone assemblies (120, 122) have surface interfaces (152) contacting each of the slip devices (124, 126) so that pressure from the cone assemblies (120, 122) is exerted according to contact along the surface interfaces (152). Each surface interface (152) can have a curvature or be a single radiused surface. Coordination of the surface interfaces (152) control pressure to insure improved fixed positioning in the wellbore.</p> |
