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Hot spray process to form alloy coating on the surface of oil pumping polished AOC alloy rod

A technology for sucking polished rods and surface alloys, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of complex processing technology, peeling of polished rods, and high cost, achieve reasonable control of the process flow, and facilitate the process flow , The effect of saving alloy powder

Inactive Publication Date: 2006-08-02
ANTON OILFIELD SERVICES (GRP) LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In the past, chemical plating and other coatings have certain protective functions, but most of them have high hardness, which cannot guarantee the high strength, wear resistance and corrosion resistance of the surface of the polished rod at the same time, and the ordinary coated polished rod after scratches are easily damaged by electrochemical reactions. The overall spalling occurs, which cannot meet the requirements of the oil field
Moreover, the entire processing technology is mostly complicated, costly, complicated to operate, and the processed polished rods cannot fully adapt to the long-term and high-intensity workload of oil pumping polished rods, which seriously restricts the demand for gradually improving production efficiency in oil fields.

Method used

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  • Hot spray process to form alloy coating on the surface of oil pumping polished AOC alloy rod

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Experimental program
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Effect test

Embodiment Construction

[0009] The thermal spraying process of alloy coating on the surface of AOC alloy oil pumping rod is carried out according to the following procedures:

[0010] 1. Degreasing treatment

[0011] Clean the polished rod blank with kerosene or gasoline to remove surface oil.

[0012] 2. Coarsening treatment

[0013] Install the polished rod on the quenching machine tool, and polish the surface with a 50-100# abrasive belt during the process of advancing and rotating, with a feed rate of 5-15 μm to make the surface roughness 0.8-3.2 μm.

[0014] 3. Preheat

[0015] Preheat the polished rod to 200-300°C for 5 minutes.

[0016] 4. Spraying

[0017] The dynamic balance spraying method is adopted to ensure the rotation speed of the polished rod is 100-300r / min, the traveling speed is 0.2-5m / min, the gas pressure is controlled at 0.5-0.8Mpa, the spraying distance is 200-1000mm, and the spraying angle is 0-90° from the horizontal. The number of spraying can be set according to the ac...

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Abstract

The hot spray process to form AOC alloy coating on the surface of polished oil pumping rod includes the following steps: surface deoiling the rod; roughening with grinding wheel; pre-heating to activate surface, spraying AOC alloy powder at 0.5-0.8 MPa gas pressure, spraying distance 200-1000 mm and spraying angle 0-90 deg.c; heating in a MF inducing furnace to smelt the alloy coating at 1000 deg.c for 5-10 min; and final polishing with grinding belt. The technological process is simple and can form one coating of 0.25-0.6 mm thickness to resist wear and corrosion.

Description

technical field [0001] The invention relates to a thermal spraying processing technology for an alloy coating on the surface of an AOC alloy oil pumping polished rod, and belongs to the field of petroleum equipment processing. Background technique [0002] Rod pump oil production of pumping unit is an artificial lifting oil production method, which is widely used in major oil fields at home and abroad for its advantages of simple equipment, low investment, convenient management and strong adaptability. The performance of rod pump oil extraction equipment plays a decisive role in the field of oil extraction. As one of the key components of rod pump oil production, the polished rod is a special sucker rod on the upper part of the sucker rod. It is mainly used to connect the braid of the donkey head and the downhole sucker rod. Passed to the downhole sucker rod. It is exposed to the outdoor atmosphere during the upstroke, immersed in the well fluid during the downstroke, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/04C23C4/12C23C4/02C23C4/18
Inventor 张庚娟岑广远刘玄
Owner ANTON OILFIELD SERVICES (GRP) LTD
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