Lock assembly
AssigneeShell Oil Company
InventorWilhelmus Hubertus Paulus Maria Heijnen
Life of this patent
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Abstract
A lock assembly for locking an outer tubular element to an inner tubular element extending through the outer tubular element for holding loads between the tubular member when lowered downhole. The assembly includes a lock mandrel connected to one of the tubular elements and the other tubular element having a recess with at least one inwardly converging side surface. A lock member, having a retracted and an expanded mode, is arranged between the first and second tubular elements. The lock member is movable relative to the recess in the retracted mode and locks against the inwardly diverging side surface when in the expanded mode.
Claims9
A lock assembly for locking an outer tubular element to an inner tubular element extending through the outer tubular element, the assembly comprising a lock mandrel connected to one of said tubular elements and being provided with a recess facing the other one of said tubular elements, the bottom of the recess having a greater cross-sectional width than the top of the recess, a lock member arranged between the first and second tubular elements in a locking relationship with the other one of the tubular elements, the lock member extending into said recess and being operable between a retracted mode in which the lock member is movable relative to the recess and an expanded mode in which the lock member is expanded within the recess, the assembly further comprising an actuator means for expanding the lock member in said recess.
Dependencies are inferred from the claim text.