Importance

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Abstract

A coupling removing apparatus by which a threaded rod coupling can be removed from one threaded end of a sucker rod, comprising a main frame and a radially active segmented coupling engaging member which is mounted to the main frame and forms a cavity of a size to receive the made-up coupling on a sucker rod therein. An open ended wrench is mounted to the frame for movement radially towards and away from the centerline of the cavity at a location to engage the wrench flat of the rod. The wrench is moved into engagement with the rod flats adjacent the coupling, then the segments of the coupling engaging member are moved to engage the coupling with great force. The wrenches are counter-rotated about the axis of the rod and coupling with sufficient force to break the threaded connection between the coupling and the rod. The coupling engaging member includes an interior of cylindrical configuration that is divided into three segments. First and second arms are connected at one end by a link, and the other end of the arms are moved toward one another by a hydraulic cylinder. One segment is pivotally mounted on the link; another segment is pivotally mounted on one of the arms; and the third segment is pivotally mounted on the other arm. The segments are aligned along a common longitudinal axis that extends through the coupling cavity and the pivoted end of the wrench. This combination engages the coupling with great force and does not distort nor injure its outer surface.

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First Claim