Patent ID: 8590616

Claim:
A caged ball fractionation plug for use in a wellbore comprising: a. a mandrel having a crown engagement and a first setting mechanism receiving portion and a second setting mechanism receiving portion, wherein the crown engagement has a larger diameter portion with a diameter larger than the setting mechanism receiving portions, and wherein the setting mechanism receiving portions are between terminal ends of the mandrel, and wherein an anti-rotation ring is disposed on the larger diameter portion of the crown engagement; b. a load ring slidably engaged to the mandrel; c. a first slip disposed adjacent to the load ring; d. a first slip backup adjacent the first slip on the mandrel; e. a first lubricating spacer adjacent the first slip backup; f. a first secondary seal adjacent the first lubricating spacer; g. a primary seal adjacent the first secondary seal; h. a second secondary seal adjacent the primary seal; i. a second lubricating spacer adjacent the second secondary seal; j. a second slip backup adjacent the second lubricating spacer; k. a second slip adjacent the second slip backup; l. a removable nose cone disposed over the mandrel adjacent the second slip, wherein the removable nose cone comprises: (i) a nose cone body with an opening; (ii) a dual tapered engagement integral with the nose cone body, wherein the tapered engagement comprises a first sloped face, and a second sloped face; (iii) a central opening formed between the first sloped face and the second sloped face; (iv) a pump down ring groove formed between the nose cone body and the tapered engagement for containing a pump down ring; and (v) a plurality of pressure relief grooves extending longitudinally, with each pressure relief groove disposed on an outer surface of the nose cone body; and m. a caged ball setting mechanism threaded into the first setting mechanism receiving portion between a facial seal located in the first setting mechanism receiving portion and the removable nose cone, wherein caged ball setting mechanism comprises: (i) a caged ball setting mechanism body engaging the facial seal; (ii) a setting mechanism load shoulder adjacent the shear device body; (iii) an extension extending from the load shoulder; and (iv) an outer surface of the caged ball setting mechanism body for engaging internal threads of the first setting mechanism receiving portion, wherein the caged ball setting mechanism body comprises: (a) an internal caged ball seat formed in the interface between a caged ball chamber and an extension portal; (b) a caged ball seat guide adjacent the internal caged ball seat; (c) a caged ball retaining rod adjacent the caged ball chamber; (d) an upper caged ball chamber; and (e) shear threads formed in an inner surface of the upper caged ball chamber.