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Protective treatment method for oil sucking rod, oil pipe and sleeve used specially for oil field

A technology for sucker rods and oil pipes, which is applied in the field of protective treatment of metal pipes and rods, can solve problems such as easy peeling of pick-up pumps, temporary solutions, and poor quality, and achieve considerable economic benefits, cost reduction, and strong pertinence.

Inactive Publication Date: 2004-01-07
付建影 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the sucker rods and oil pipes in the oil industry are protected by nickel plating and coating, and the repairs are car buckles and straightening. Short service life, the coated pipe is easy to peel off due to the movement friction of the sucker rod in the oil well, and the pump is easily peeled off, and the stratum is blocked after peeling in the water well

Method used

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  • Protective treatment method for oil sucking rod, oil pipe and sleeve used specially for oil field
  • Protective treatment method for oil sucking rod, oil pipe and sleeve used specially for oil field
  • Protective treatment method for oil sucking rod, oil pipe and sleeve used specially for oil field

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0047] In this example, oil removal → rust removal → surface activation → anodic plating → multi-functional plating process is adopted for the oil pipe to obtain the following figure 1 The oil pipe with a composite layer thickness of 10 microns in the coating structure has an amorphous coating, a friction coefficient of 0.1-0.2, a bright black surface, a phase transition temperature of 342.4°C, an elongation of 3-6%, and no pinholes. Acid, alkali and salt immersion resistance, other properties are shown in Table 1-Table 4.

example 2

[0049] In this example, oil removal→rust removal→inner wall spraying→outer wall spraying is adopted for the oil pipe. Both the inner and outer walls are sprayed twice, and the spray paint needs to be dried and solidified after each spraying, and the following is obtained: figure 2 The shown oil pipe with coating structure, the spray paint used is petroleum resin.

[0050] The properties of the oil pipe are: paint film thickness 65μm, hardness (HV) 300, flexibility 1mm, impact resistance 50kg / cm 3 , acid resistance: no change in immersion in 80% sulfuric acid for 100 hours, alkali resistance: no change in immersion in 10% sodium hydroxide for 106 hours, salt resistance: no change in immersion in 30% brine for 100 hours .

example 3

[0052] In this example, oil removal→rust removal→surface activation→inner wall anodic plating→inner wall multi-functional plating→outer wall spraying→drying and curing spraying process is adopted for the oil pipe, and the following is obtained: image 3 Oil pipe with inner wall coating and outer wall spray coating structure. The outer wall is sprayed twice, and the spray paint used is polyester resin, and its performance: the outer wall performance is the performance of Example 2, and the inner wall is the performance of Example 1.

[0053] Alloy composition

[0054] PTFE content (%)

[0055] PTFE content (%)

[0056] PTFE content (%)

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Abstract

The present invention adopts the technological steps of degreasing, removing rust, surface activating, cathode plating and multifunctional plating or degreasing, removing rust, spray-coating inner wall, spray-coating outer wall, drying and solidifying paint film so as to obtain the invented pumping rod, oil pipe and sleeve with several protective layers. Besides, said invention also adopts the processes of plating inner layer and painting outer layer or plating inner layer and outer layer or coating inner layer and outer layer, also can add anti-scaling layer, paraffin-inhibiting layer, corrosion-inhibiting layer or other functional layer.

Description

technical field [0001] The invention relates to a protection treatment technology for metal pipes and rods, more specifically, a protection and repair method for sucker rods, oil pipes and casings used in petroleum exploitation. Background technique [0002] At present, the sucker rods and oil pipes in the oil industry are protected by nickel plating and coating, and the repairs are car buckles and straightening. The service life is short, and the coated pipe is easy to peel off due to the movement friction of the sucker rod in the oil well, and the pump is easily peeled off, and the stratum is blocked after peeling in the water well. Contents of the invention [0003] The purpose of the invention is to overcome the shortcoming of prior art, propose a kind of protection treatment method of sucker rod, oil pipe and casing (hereinafter referred to as rod, pipe). [0004] The main technical scheme of the present invention: firstly, protect the pipe body from the protection m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14C23C28/00
Inventor 付建影马长虹
Owner 付建影
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