Patent ID: 8919431

Claim:
A wellbore anchoring system comprising: a body elongated along a central longitudinal axis having an upper end and a lower end, the body defining an average outer surface at a first average outer diameter, the body further comprising: (i) an upper portion, a lower portion, and a mid portion, an upper slip system comprising at least one upper slip, a lower slip system comprising at least one lower slip, the upper and lower slip systems disposed in the mid portion; (ii) the upper portion comprises a top subassembly with a to subassembly upper face, a top subassembly lower face; the mid portion defines a mid portion longitudinal length, the mid portion further comprising an upper rod retainer, an upper slip retainer an upper rod, a lower slip retainer, with the mid portion having a mid portion upper face, a mid portion lower face, the mid portion defining an internal mid channel running longitudinally and open to the mid portion upper and lower faces; the lower portion comprises a piston assembly and a bottom subassembly, the piston assembly having a piston assembly upper face, a lower face, and an inner face defining a passage; (iii) a mandrel having a mandrel upper end and a mandrel lower end, a mandrel longitudinal length greater than the mid portion longitudinal length, the internal mid channel configured to receive the mandrel, the mandrel defining a mandrel upset, the top assembly lower face defines an upper receptacle for receiving a portion of the mandrel upper end, the mandrel passing through the passage of the piston assembly with the piston assembly slideably mounted about the mandrel at the piston assembly inner face, the lower portion defining a lower receptacle for receiving a portion of the mandrel lower end; (iv) a hydraulic setting system in operable engagement with the upper and lower slip systems such that application of a predetermined hydraulic pressure to the system expands the at least one upper and lower slips laterally to a set position at a second average outer diameter that is greater than the first average outer diameter; (v) a withdrawal system disposed within the body and configured such that application of a predetermined upward force on the elongated body when the at least one upper and lower slips are in the set position operably engages the upper slip systems to retract the at least one upper slip by shouldering the upper rod retainer against the mandrel upset, engaging the at least one upper slip with an upward and retracting force through the upper slip retainer, and the upper slip retainer shoulders against the upper rod engaging the at least one lower slip with an upward and retracting force through the lower slip retainer, so as to operably engage the lower slip system to retract the at least one lower slip, and wherein the at least one upper slip and at least one lower slip are retracted substantially sequentially.