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CN-121975432-A - Special long-acting protective self-spraying tank for threads and preparation method thereof

CN121975432ACN 121975432 ACN121975432 ACN 121975432ACN-121975432-A

Abstract

The invention provides a special long-acting protective self-spraying tank for threads and a preparation method thereof, and belongs to the technical field of anti-corrosion protective materials. The long-acting protective self-spraying tank special for the threads comprises a tank body, a single-component protective coating, a valve component, a fan-shaped nozzle and a propellant, wherein the single-component protective coating comprises 40-60 parts by weight of fluorosilicone resin, 5-15 parts by weight of modified silicone oil, 3-8 parts by weight of graphite powder, 2-5 parts by weight of zinc phosphate and 20-30 parts by weight of a composite solvent. The special long-acting protection self-spraying tank for the screw thread is suitable for severe scenes such as underground pipe screw threads of oil fields, offshore platforms, wind power, iron towers, offshore photovoltaic screw threads and the like, integrates the functions of corrosion prevention, lubrication and sealing, realizes 'one-tank three-effect', does not need on-site mixing, covers a coating temperature resistant range of-30-300 ℃, can resist corrosion of various acid-base salt mediums, reduces screw thread butt joint friction by more than 60%, and can achieve sealing pressure of 15MPa.

Inventors

  • YU BENHE
  • ZHANG GUOXIN
  • Wei Jichun
  • WANG XIN
  • FENG RUILIN
  • MENG YANG

Assignees

  • 青岛罗宝节能科技有限公司

Dates

Publication Date
20260505
Application Date
20260227

Claims (8)

  1. 1. The special long-acting protective self-spraying tank for the threads is characterized by comprising a tank body, a single-component protective coating, a valve component, a fan-shaped nozzle and a propellant; The single-component protective coating comprises the following components in parts by weight: 40-60 parts of fluorosilicone resin, 5-15 parts of modified silicone oil, 3-8 parts of graphite powder, 2-5 parts of zinc phosphate and 20-30 parts of a composite solvent.
  2. 2. The special long-acting protective self-spraying tank for threads according to claim 1, wherein the mesh number of the graphite powder is more than or equal to 1000 meshes.
  3. 3. The long-acting protective self-spraying can special for threads according to claim 1 or 2, wherein the preparation method of the single-component protective coating comprises the following steps: And carrying out vacuum defoamation after carrying out second mixing on the mixture, zinc phosphate and the composite solvent to obtain the single-component protective coating.
  4. 4. The special long-acting protective self-spraying tank for threads according to claim 3, wherein the first mixing time is 25-35 min, the second mixing time is 15-25 min, the second mixing temperature is 40-50 ℃, the first mixing and the second mixing are carried out under stirring conditions, the stirring rotating speed is 800-1200 r/min independently, and the vacuum defoaming time is 12-18 min.
  5. 5. The thread specific long-acting protective self-spraying can of claim 4, wherein the propellant is a hydrofluoroalkane.
  6. 6. The special long-acting protective self-spraying tank for threads according to claim 4 or 5, wherein the valve assembly comprises a valve core, the spraying angle of the fan-shaped nozzle is 120 degrees, and the diameter of mist drops is 50-100 μm.
  7. 7. The method for preparing the long-acting protective self-spraying tank special for threads according to any one of claims 1 to 6, which is characterized by comprising the following steps: 1) Injecting the single-component protective coating into the tank body; 2) Filling propellant through the valve assembly, and detecting air tightness after sealing; 3) A fan nozzle is installed.
  8. 8. The method according to claim 7, wherein the pressure of the propellant is 0.5 to 1.0mpa.

Description

Special long-acting protective self-spraying tank for threads and preparation method thereof Technical Field The invention relates to the technical field of anti-corrosion protective materials, in particular to a special long-acting protective self-spraying tank for threads and a preparation method thereof. Background In oilfield exploitation operation, the underground pipe connecting screw thread is in high temperature (up to 300 ℃) and high pressure environment for a long time, and is continuously corroded by corrosive media such as carbon dioxide, hydrogen sulfide and the like, and is extremely easy to rust and damage. The traditional anti-corrosion coating needs special tools to be coated, the construction efficiency is low, the coating uniformity is poor, the sealing element used independently is easy to age and lose efficacy at high temperature, and the lubricating grease is difficult to consider the long-acting anti-corrosion performance. The existing self-spraying type protective products in the market are mostly single-function type or multi-component mixed systems are adopted, and the problems of poor storage stability, insufficient coating adhesion, short protective life and the like exist. For example, although part of the thread protection spray has a short-term lubricating effect, the coating is peeled off after 1-3 months in a downhole strong corrosion environment, and the service requirement of an oilfield tubular column for more than 5 years can not be met. Meanwhile, most products have high requirements on surface treatment, cannot adapt to the actual requirements of site rust-carrying construction, and limit the application range of the products. In the underground exploitation scene of an oil field, the connecting thread of the pipe always faces a 'life-death test', namely the underground high-temperature continuous baking and high-pressure continuous extrusion are carried out, and in addition, the inner wall of the thread is quickly rusted and spotted and even damaged due to the alternate erosion of corrosive media such as carbon dioxide, hydrogen sulfide and the like. The screw thread clamping stagnation is difficult to dock during installation, sealing failure, falling off and fluid leakage are caused, the maintenance cost is increased slightly, the exploitation progress is delayed, and the potential safety hazards of pipe column scrapping and burying are caused seriously. Disclosure of Invention The invention aims to provide a special long-acting protection self-spraying tank for threads and a preparation method thereof, which solve the problems of complex construction, short protection service life and insufficient stability of self-spraying products due to the cutting of anti-corrosion, lubrication and sealing functions in the protection of underground pipe threads of oil fields. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides a special long-acting protective self-spraying tank for threads, which comprises a tank body, a single-component protective coating, a valve component, a fan-shaped nozzle and a propellant, wherein the tank body is provided with a plurality of spray nozzles; The single-component protective coating comprises the following components in parts by weight: 40-60 parts of fluorosilicone resin, 5-15 parts of modified silicone oil, 3-8 parts of graphite powder, 2-5 parts of zinc phosphate and 20-30 parts of a composite solvent. Preferably, the mesh number of the graphite powder is more than or equal to 1000 meshes. Preferably, the preparation method of the single-component protective coating comprises the following steps: And carrying out vacuum defoamation after carrying out second mixing on the mixture, zinc phosphate and the composite solvent to obtain the single-component protective coating. Preferably, the first mixing time is 25-35 min, the second mixing time is 15-25 min, the second mixing temperature is 40-50 ℃, the first mixing and the second mixing are carried out under stirring conditions, the stirring rotating speed is 800-1200 r/min independently, and the vacuum defoaming time is 12-18 min. Preferably, the propellant is a hydrofluoroalkane. Preferably, the valve assembly comprises a valve core, the spray angle of the fan-shaped nozzle is 120 degrees, and the diameter of mist drops is 50-100 mu m. The invention also provides a preparation method of the special long-acting protective self-spraying tank for threads, which comprises the following steps: 1) Injecting the single-component protective coating into the tank body; 2) Filling propellant through the valve assembly, and detecting air tightness after sealing; 3) A fan nozzle is installed. Preferably, the pressure of the propellant is 0.5-1.0 MPa. The invention has the beneficial effects that: 1) The special long-acting protection self-spraying tank for the screw thread is suitable for severe scenes such as underground pipe