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A Surface Modified Coating Antifriction Oil Rod Centralizer

A technology of surface modification and centralizer, applied in the direction of coating, drill pipe, anti-corrosion coating, etc., can solve the problems of increasing cost and affecting oil well production, and achieve the effect of prolonging service life and good anti-corrosion effect

Active Publication Date: 2018-12-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to reduce the wear between the sucker rod and the oil pipe, the existing sucker rod is equipped with a sucker rod centralizer at the part that is easy to wear. Currently, several kinds of centralizers are commonly used, such as roller centralizers, column centralizers or The clamp-type centralizer is only considered to reduce the wear resistance from the design structure. Although it has achieved certain results, due to the serious wear and tear on site, more than 33% of the oil wells in Changqing Oilfield are still repaired due to such accidents in the annual workover operations. , which not only increases the cost, but also affects the production of oil wells

Method used

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  • A Surface Modified Coating Antifriction Oil Rod Centralizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a surface modified coating anti-friction sucker rod centralizer provided in this embodiment includes a coupling 1, a rod body 2 connected to the front end of the coupling 1, and a centralizer set on the rod body 2. Cover 3; the outer surface of the centralizing cover 3 is coated with a surface-modified coating, and the surface-modified coating is composed of the following materials in mass percentage: 10-27% composite solid self-lubricating material, 20-30% ring Oxygen resin, 28-30% solvent, 1-2% nano-alumina, 0.5%-2% coupling agent, 10-25% curing agent.

[0021] The invention adds a layer of surface modified coating on the centralizing sleeve of the oil rod centralizer, and the surface modified coating improves the oil rod centralizer's self-lubrication, wear resistance, impact resistance, high load bearing, ablation resistance, anti-sticking, Multifunctional integrated performance such as anti-corrosion and high temperature and low temperat...

Embodiment 2

[0023] On the basis of Example 1, the surface modification coating is made up of the following materials in percentages: 22% composite solid self-lubricating material, 25% epoxy resin, 30% solvent, 1% nano-alumina, 2% even Joint agent, 20% curing agent.

[0024] In the surface modification coating, the composite solid self-lubricating material can effectively overcome the non-uniform wear of the centralizing sleeve, significantly improve the running-in state of the friction pair, and has the advantages of reasonable structure and reliable and stable performance. The epoxy resin has good physical and chemical properties after curing, and has good bonding strength to metal and non-metal surfaces, high hardness and good wear resistance. The coupling agent is used to modify the nano-alumina to form a modified nano-alumina; and is used to connect the epoxy resin to build a bridge between the nano-alumina and the epoxy resin, so that the nano-alumina and the epoxy resin Form a comp...

Embodiment 3

[0029] On the basis of Example 1, the surface modification coating is made up of the following materials in mass percent: 25% composite solid self-lubricating material, 20% epoxy resin, 30% solvent, 3% nano-alumina, 2% even Joint agent, 20% curing agent.

[0030] Through testing, it can be obtained that the performance parameters of the surface modification coating used in Example 3 all meet the specification requirements.

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Abstract

The invention relates to sucker rod centralizers, in particular to an abrasion reduction sucker rod centralizer with a surface modification coating. The centralizer comprises a coupling, a rod body and a centralizing sleeve, and the centralizing sleeve sleeves the rod body which is connected to the front end of the coupling. The outer surface of the centralizing sleeve is coated with the surface modification coating, and the surface modification coating is prepared from, by mass, 10-27% of composite solid self-lubricating materials, 20-30% of epoxy resin, 28-30% of solvents, 1-3% of nano aluminum oxide, 0.5-2% of a coupling agent and 10-25% of a curing agent. By addition of the surface modification coating on the outer surface of the centralizing sleeve, the friction coefficient of the centralizer is decreased to 0.01 or below to give full play to centralizing and abrasion proofing of the centralizer; due to great corrosion-proof effects of the protective coating, the service life of a pipe column of a sucker rod is prolonged, and an oil well pump inspection period is prolonged.

Description

technical field [0001] The invention relates to an oil rod centralizer, in particular to a surface-modified coating antifriction oil rod centralizer. Background technique [0002] In order to reduce the wear between the sucker rod and the oil pipe, the existing sucker rod is equipped with a sucker rod centralizer at the part that is easy to wear. Currently, several kinds of centralizers are commonly used, such as roller centralizers, column centralizers or The clamp-type centralizer is only considered to reduce the wear resistance from the design structure. Although it has achieved certain results, due to the serious wear and tear on site, more than 33% of the oil wells in Changqing Oilfield are still repaired due to such accidents in the annual workover operations. , which not only increases the cost, but also affects the production of oil wells. Contents of the invention [0003] Aiming at the problems existing in the background technology, the object of the present inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08E21B17/10C09D7/61C09D7/63
CPCC08K3/08C08K3/14C08K3/16C08K3/22C08K3/30C08K13/02C08K2003/0862C08K2003/162C08K2003/2227C08K2003/3009C08K2201/011C09D5/08C09D7/61C09D7/63C09D163/00E21B17/1071
Inventor 雷宇慕立俊周志平黄伟赵春甘庆明樊松姚洋石海霞梁毅郭靖苏祖波
Owner PETROCHINA CO LTD