Patent ID: 9714554
Date: 2017-07-25
CPC Classifications: E21B

Claim:
1. A downhole plug for use in a well bore, the plug having a run-in configuration, a deployed configuration, and a released configuration, the plug comprising: a mandrel; a bull nose having an upwardly facing bearing surface; a cone and an expandable slip, each concentrically positioned around the mandrel, the cone positioned adjacent to the slip, the expandable slip having an internal surface and an external surface, the external surface containing a gripping surface; the cone having a shaped engagement surface for engaging the expandable slip internal surface; whereby, when the plug is in the deployed configuration, the slip is expanded; an inner sleeve and an outer sleeve, the outer sleeve positioned concentrically around the inner sleeve and the inner sleeve positioned concentrically around the mandrel, the inner sleeve slidable about the mandrel but releasingly engaged with the mandrel in the run-in configuration and the deployed configuration, the inner sleeve slidable about the outer sleeve but releasingly engaged to the outer sleeve in both the run-in configuration and the deployed configuration and the released configuration, the inner sleeve engaged with the mandrel in the run-in configuration and deployed configuration, the inner sleeve released from the mandrel and slidable about the mandrel in the released configuration; and an elastomeric member disposed about the mandrel between the outer sleeve and the bull nose; wherein the outer sleeve is configured to be engaged with the expandable slip in the run-in configuration and the outer sleeve is configured to be released from the expandable slip in the deployed configuration and wherein in the released configuration, the releasingly engaged inner and outer sleeves are pulled from the well bore leaving the mandrel, the bull nose, the cone, the expandable slip and the elastomeric member in the well bore.