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Valve body surface protection treatment process

A treatment process, a technology for the body, which is applied in the field of surface protection treatment of the body, can solve the problems affecting the overall progress and maintenance costs of drilling and production operations, and achieve the effect of reducing maintenance costs and improving the overall progress.

Inactive Publication Date: 2018-06-01
YANTAI JEREH PETROLEUM EQUIP & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Severe surface corrosion and corrosion pitting are one of the main failure modes of the valve body at present. Once the valve body fails, it will seriously affect the overall progress and maintenance cost of the drilling operation on site

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Sand blasting: the surface of the valve body after the heat treatment is completed is sprayed with brown steel grit; pretreatment: utilize the alkaline cleaning liquid cleaning method to remove oil stains, oxides and scale impurities on the surface of the valve body; cleaning: use Rinse the chemical substances remaining on the surface of the valve body with clean water; preheating: put the valve body in hot water to preheat, so that the temperature of the workpiece reaches 90 ° C; coating: configure the plating solution according to the ratio of phosphorus content of 10%, and Put the preheated workpiece into the plating solution for coating, and keep the temperature of the plating solution at 90°C during the coating process; post-plating treatment: wash, air dry and store within 1 hour after the coating is completed.

Embodiment 2

[0021] Embodiment 2: sand blasting: the surface of the valve body after the heat treatment is completed is sprayed with brown steel grit; pretreatment: utilize the alkaline cleaning liquid cleaning method to remove oil stains, oxides and scale impurities on the surface of the valve body; cleaning: use Rinse the chemical substances remaining on the surface of the valve body with clean water; preheating: put the valve body in hot water to preheat, so that the temperature of the workpiece reaches 85 °C; coating: configure the plating solution according to the ratio of phosphorus content of 10%, and Put the preheated workpiece into the plating solution for coating, and keep the temperature of the plating solution at 85°C during the coating process; post-plating treatment: wash, air dry and store within 1 hour after the coating is completed.

Embodiment 3

[0022] Embodiment 3: sand blasting: the surface of the valve body after the heat treatment is completed is sprayed with brown steel grit; pretreatment: utilize the alkaline cleaning liquid cleaning method to remove oil stains, oxides and scale impurities on the surface of the valve body; cleaning: use Rinse the chemical substances remaining on the surface of the valve body with clean water; preheating: put the valve body in hot water to preheat, so that the temperature of the workpiece reaches 95 °C; coating: configure the plating solution according to the ratio of phosphorus content of 10%, and Put the preheated workpiece into the plating solution for coating, and keep the temperature of the plating solution at 95°C during the coating process; post-plating treatment: wash, air dry and store within 1 hour after the coating is completed.

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PUM

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Abstract

The invention provides a surface protection process used for long-time corrosion prevention and rust prevention. The process comprises the following process flow: sandblasting: performing surface blasting of brown steel shot on a valve body after heat treatment; pretreatment: cleaning to remove impurities such as oil stains, oxides, or water scales on the surface of the valve body by utilizing analkaline cleaning liquid; cleaning: rinsing chemical substances remaining on the surface of the valve body with clean water; plating solution preparation: preparing a plating solution according to a ratio of 5% to 14% of phosphorus content; preheating: putting the valve body in hot water to be preheated so that the temperature of a workpiece is close to the temperature of the plating solution; plating: putting the preheated workpiece into the plating solution for plating; treatment after plating: after the plating is completed, cleaning, air drying and storing the workpiece sequentially withinone hour. The surface protection process provided by the invention can delay the premature rust and corrosion of the valve body in the use process, and prolong the service life of the valve body to 20 to 30 hours.

Description

technical field [0001] The invention relates to the technical field of surface treatment of high-pressure components for drilling and production in oil and gas fields, and in particular relates to a process for surface protection treatment of a valve body. Background technique [0002] The invention relates to a valve body which is an important part of a plunger pump product in oil and gas field exploitation operations. Suction of low-pressure fluid and discharge of high-pressure fluid in acidizing operations. The plunger pump works for a long time, and the valve body has been subjected to the erosion, wear, corrosion and rust of high-pressure fluid media such as slippery water, ceramsite sand, acid and cement slurry for a long time, and the service life is 6-10 Rust and corrosion pitting occur within hours. Severe surface corrosion and corrosion pitting are one of the main failure modes of the valve body at present. Once the valve body fails, it will seriously affect the ...

Claims

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Application Information

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IPC IPC(8): C23C18/32C23C18/18
CPCC23C18/32C23C18/1806
Inventor 李朋李建福崔海萍
Owner YANTAI JEREH PETROLEUM EQUIP & TECH CO LTD
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