Production technique and devices for hot spraying alloy coating on polished pumping rod

Abstract

The invention relates to a production technique and devices for hot spraying an alloy coating on the surface of a polished pumping rod. The production technique comprises the following steps: (1) carrying out roughening treatment on the surface of the polished pumping rod to prepare for surface spraying; (2) carrying out hot spraying, remelting and tempering treatment on the surface of the polished pumping rod treated by the roughening treatment; and (3) polishing and burnishing the surface with the coating to finish the final surface treatment. The used devices comprise a first surface spray painting machine, a second surface spray painting machine, a surface roughing machine, a surface abrasive finishing machine, a first roller conveying line, a second roller conveying line and an automatic manipulator. The production technique and the devices improve the stability of the devices and the interchangeability of parts, reduce the fault rate and the maintenance time of the devices, reduce the requirement on operator, improve the production quality, and facilitate the further simplification of the production supervision.

Description

technical field [0001] The invention relates to a novel alloy-coated thermal-sprayed oil pumping polished rod production line, which belongs to the field of petroleum equipment. Background technique [0002] In the petroleum industry, pumping unit and rod pump oil production is an artificial lift oil production method, which is widely used in various oil fields at home and abroad for its advantages of simple equipment, low investment, convenient management, and strong adaptability. The pumping unit, the sucker rod and the pump are the three main components of the rod pump oil production equipment, and the sucker rod is the part that transmits the motion and power of the pumping unit to the downhole pump for pumping. The sucker polished rod is a special sucker rod on the upper part of the sucker rod string, which is used to cooperate with the wellhead sealing box to seal the oil wellhead, so the working conditions are worse than the sucker rod. In addition to the working cond...

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Problems solved by technology

On the other hand, when using abrasive belt grinding head to polish the surface of the polished rod, in order to ensure a certain grinding effect and grinding efficiency, the downward pressure load of the grinding head on the rod body will be very high, which causes the workpiece to be stressed during the grinding process. A large vibration is generated, which causes the workpiece to jump continuously during the travel process, and it is easy to touch and hit the intermediate frequency heating coil, causing damage to the equipment and a high failure rate of the equipment

[0008] In addition, the use of this equipment can only be used for single-piece small-batch production, and the production efficiency is low; multi-process integrated equipment has high requirements for operators, and human error is prone to occur, resulting in a decline in the yield, which greatly reduces the quality of the alloy. The market competitiveness of coated thermal sprayed polished rod products has affected the widespread promotion of thermal spraying technology, an excellent surface treatment technology, in the field of petroleum equipment

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