Flushing (pump and compressor) pipes serve for drilling of a cement stone and washing of upsetting operational columns.
Detailed
- The node in which it is used:
- at-bit damping device;
- hydroshock mechanisms;
- hydromechanical and hydraulic jars.
- Service conditions: drilling mud, washing fluid, with the high content of abrasive particles, operating temperature 80-90 ºС.
- The arising problems:
- wear of a working surface;
- teases;
- scratches owing to contact with abrasive particles;
- corrosion damage.
- Decision: Applying a wear-resistant, corrosion-resistant WC / Co / Cr coating by high-speed spraying with a standard thickness of 0.25 + 0.05 mm per side, followed by grinding and polishing to Ra 0.05 microns. The resulting coatings have a hardness of up to 72 HRC and a porosity of less than 1%. When the wear surface is more than 0.5 mm, the technology of restoring the size of the part with the subsequent application of wear-resistant carbide coating of standard thickness has been developed.
- Result: Increase in an operating time of a detail in the conditions of circulation of saliferous and acid washing fluid till 1500-2000 o'clock. Repeated maintainability of the put covering with the maximum understating of operating diameter to 2.0 mm.