Patent ID: 8491727
Filing Date: 2013-07-23
Classification: B08B,E21B,F16L

Abstract:
1. An apparatus device for mechanically loosening scale inside a pipe arranged to convey hydrocarbon fluids from a production zone in a well, said device comprising: an actuator arranged in a housing including an axially movable stem which extends through an end portion of the housing and into connection with a wireline, said actuator being provided with at least one cam; and wherein the wireline is configured to apply a push force generated by a wireline-feeding apparatus to the actuator; at least one cutting element being arranged radially movable in a recess in the housing, the cam bearing, by the axial movement of the actuator towards a first extreme position, against the cutting element, applying to it the push force directed radially outwards; and the cam relieving, by the axial movement of the actuator towards a second extreme position, away from the cutting element, having the effect of the cutting element being able to move radially into the recess in the housing; wherein the actuator includes a spring arranged on the stem to apply a load to the stem and move the actuator towards the first extreme position; wherein the actuator includes an adiustable end stop which is arranged, by abutment against the end portion of the housing, to reduce the axial movement of the stem towards the first extreme position in order, thereby, to restrict the radial movement of the cutting element out of the recess of the housing.