Wells – Processes – Cleaning or unloading well
Patent
1983-05-09
1985-01-22
Novosad, Stephen J.
Wells
Processes
Cleaning or unloading well
51319, 166244C, E21B 1900
Patent
active
044946074
ABSTRACT:
Method of cleaning tubular goods, especially sucker rods, and inhibiting the sucker rods against corrosion as the rod string is being withdrawn from a borehole. The method is carried out by the provision of an enclosure which is attached to the upper end of a cased borehole. The upper end of the sucker rod string is extended axially through the enclosure as the rod string is withdrawn from the casing. A medial length of the rod string is engaged by a resilient packer device which wipes the rod clean of well fluids and loose debris. The rod string is next cleaned within a second chamber by impacting the outer surface thereof with an abrasive substance. The rod surface is again cleaned of any residual material. The rod is then moved through another chamber where corrosion inhibitor is applied to the external surface of the rod. As each treated joint of rod is withdrawn from the enclosure, the rod joints are sequentially unscrewed and suitably stacked, where the rods are protected from the elements, as well as being protected when the rods are subsequently made up into a rod string as the rod is replaced into a borehole.
REFERENCES:
patent: 1725593 (1929-08-01), Mobley
patent: 2621446 (1952-12-01), Russell
patent: 3475781 (1969-11-01), Grant
patent: 4279300 (1981-07-01), Wirsch
Ford Michael B.
Griffin Jim B.
Bates Marcus L.
Novosad Stephen J.
Starinsky Michael
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