Patent ID: 7178602
Filing Date: 2007-02-20
Classification: E21B

Abstract:
1. A method for setting and retrieval of a well plug, wherein the well plug is first moved to a selected position in the well bore, the method comprising the following steps: mounting a packer element and an anchoring device on a shaft, the packer element and the anchoring device each being movable relative to the shaft between retracted and expanded positions; mounting a displacement member on the shaft and connecting the anchoring device to the displacement member; mounting an operating member on the shaft and connecting the operating member to the packer element with a link connection device; connecting a locking device between the operating member and the displacement member that has a released position wherein the displacement member will move axially in unison with the operating member when the operating member is moved in a first direction and a locked position wherein the operating member may continue moving in the first direction relative to the displacement member; with the locking device in the released position, moving the operating member axially in the first direction, causing the displacement member to move axially along with the operating member relative to the shaft, thereby moving the anchoring device radially out from the shaft to the expanded position such that anchoring in the well bore wall is achieved; then locking the displacement member in the locked position with the locking device; and moving the operating member further axially in the first direction relative to the displacement member and the shaft, thereby moving the packer element via the link connection radially out from the shaft from the retracted to the expanded position such that the packer element forms a pressure tight seal against the well bore wall.