NTS-Leader provides services for pumping rods repair that were in operation on automated processing equipment complexes.
During the primary visual inspection of pumping rods are usually revealed unacceptable defects visible to the naked eye: breakages, deep mechanical damages, collar and rod surface damages more than acceptable, out-of-limit rods distortion that make them non-repairable.
Rods passed visual control are cleaned from oil-products and asphalt resins and paraffins in the washing unit by water with addition of detergent at 80-90⁰ C.
After washing and mechanical cleaning rods' threaded elements is made threads visual inspection for damage, instrumental control thread by gauges and, if necessary, defective thread segments correction by die nuts or taper taps. Also carried out visual and instrumental control of pumping rods body for defects, mechanical damages, depreciation or bending more than allowable. Rods with unacceptable defects are rejected and marked with paint. Proper rods are sorted by typical sizes, trademarks, steel grade and heat treatment type.
Pumping rods improvement for restoration their axial geometry and defectoscopy are carried out simultaneously on the same installation.
Welding deposit new centralizers on pumping rods is carried out by injection molding machine after dismantling of worn centralizers and stripping surface for the installation the new ones. Type (construction), centralizers’ quantity and layout on the rod are determined by the Customer. Rods with weld centralizers are come to marking and conservation section.
At a special rack made control of rod curving and threaded head beating relative to the rod body, after that coupling are screwed on the rod. Markings on the pumping rods applied by the shock pulse method. Marking indicates the manufacturer and rods production date.
On the pumping rods threaded elements and couplings is applied preservation grease and protective elements are installed.
The rods are packed in packages on typical sizes. In the packages rods are recorded in the special support assembly that prevents rods distortion and their contact with each other during transportation and storage. Each package has passport, which contains a data on the manufacturer, the rods quantity in the package, class (strength group) and release date.