Helical scraper apparatus for a reciprocating sucker rod
AssigneeRG Industries Ltd.
InventorThomas Hubert Vermeeren
Life of this patent
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Abstract
A scraper apparatus for a reciprocating sucker rod for prevention of the wearing of grooves in well tubing. The scraper is formed by a body with two opposed spiral vanes extending 180 degrees around the body and defining flow channels positioned between the spiral vanes. The scraper is secured to the reciprocating sucker rod and is positioned within the well tubing. The well tubing has an inner circumference with the two opposed spiral vanes engaging 360 degrees of the inner circumference of the well tubing while enabling fluids to bypass the body through the flow channels.
Claims7
A sucker rod scraper/sucker rod combination, comprising:
- a sucker rod having an elongate cylindrical body;
- at least one sucker rod scraper including a hub-like body disposed around the elongate cylindrical body of the sucker rod, the hub-like body having two opposed spiral vanes each of which extend 180 degrees around the elongate cylindrical body;
- and
- flow channels positioned between the spiral vanes, the flow channels having opposed ends parallel to the body of the sucker rod, such that flow both enters and exits the flow channels parallel to the elongate cylindrical body of the sucker rod.
A sucker rod scraper and sucker rod combination, the combination comprising:
- a sucker rod having an elongate cylindrical body;
- at least one sucker rod scraper including a hub-like body located along and disposed around the elongate cylindrical body of the sucker rod, the hub-like body having two opposed spiral vanes which each extend 180 degrees around a periphery of the elongate cylindrical body;
- a pair of opposed flow channels positioned between the two opposed spiral vanes, each of the pair of opposed flow channels having a pair of opposed inlets and outlets which extend parallel to the elongate cylindrical body of the sucker rod such that a flow of fluid axially along the elongate cylindrical body enters the pair of opposed inlets, of the pair of flow channels, while flowing parallel to the elongate cylindrical body of the sucker rod and the flow of fluid exits the pair of opposed outlets, of the pair of opposed flow channels, while flowing in a direction parallel to the elongate cylindrical body of the sucker rod.
A sucker rod scraper and sucker rod combination, the combination comprising:
- a sucker rod having an elongate cylindrical body defining a longitudinal axis;
- at least one sucker rod scraper including a hub-like body located along and disposed around the elongate cylindrical body of the sucker rod, the hub-like body having two opposed spiral vanes which each extend 180 degrees around a periphery of the elongate cylindrical body;
- and said two opposed spiral vanes each having an axial length of between 2 inches and 12 inches and a spiral vane thickness of between ½ inch and 1 inch;
- a pair of opposed flow channels formed between the two opposed spiral vanes, each of the pair of opposed flow channels having a pair of opposed inlets and outlets which extend parallel to the elongate cylindrical body of the sucker rod such that a flow of fluid axially along the elongate cylindrical body enters the pair of opposed inlets, of the pair of flow channels, while flowing parallel to the elongate cylindrical body of the sucker rod and the flow of fluid exits the pair of opposed outlets, of the pair of opposed flow channels, while flowing in a direction parallel to the elongate cylindrical body of the sucker rod.
Dependencies are inferred from the claim text.