Abstract: A gripper for use in a downhole tool is provided. The gripper can include an actuator, a toe assembly, and an expandable assembly. The toe assembly can be a leaf-spring like elongate continuous beam. The expandable assembly can be a linkage including a plurality of links. The linkage is coupled to the actuator such that the actuator expands the expandable assembly which in turn expands the toe assembly. In operation, during one stage of expansion radial forces are transmitted to the toe through both interaction of a rolling mechanism on the toe with the expandable assembly and pressure of the linkage assembly directly on an inner surface of the toe.

Abstract: A packerfoot includes a bladder assembly comprising an elongated generally tubular inflatable bladder having ends bonded to generally rigid bladder attachment portions. The bladder includes end portions bonded to the bladder attachment portions and a central inflatable portion. The bladder comprises multiple layers of rubber, one or more of which are reinforced by fibers, preferably S-glass. At each end of the bladder, the layers terminate at different longitudinal positions, forming annular steps on the exterior surface of the bladder. Conforming annular steps are formed on the interior surface of the bladder attachment portions. The bladder ends are bonded to the bladder attachment portions such that the annular steps of the bladder conform to the annular steps of the bladder attachment portions. The total bond length of the bladder to the bladder attachment portions is greater than or equal to twice the length of the inflatable portion of the bladder.