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Failure fracture cleaning method and solution for cleaning

A technology for cleaning solutions and fractures, used in cleaning methods and utensils, cleaning methods using liquids, chemical instruments and methods, etc. It can solve the problem that the type and dosage of corrosion inhibitors are not clearly defined, and the removal effect of corrosion products on fractures is weak. , the actual use of technical personnel confusion and other problems, to avoid irreversible damage, convenient preparation, easy to master the effect

Inactive Publication Date: 2019-05-21
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2) Use cellulose acetate and acetone to prepare a colloidal solution to peel off the attachments from the fracture; the above two methods have a good cleaning effect on the sediment and oil stains attached to the fracture surface, but the removal effect on the corrosion products on the fracture little;
[0006] 3) For corrosion products, dilute hydrochloric acid or hydrochloric acid + corrosion inhibitor is generally used to clean up, but due to the low pH value of hydrochloric acid, when processing samples, a little carelessness will cause fatal damage to the fracture, so use hydrochloric acid + Corrosion inhibitors are used to clean the fracture. While cleaning the corrosion products, the corrosion rate can be reduced by adding corrosion inhibitors, which can protect the fractures to a certain extent. However, the type and dosage of corrosion inhibitors are not clearly defined. It brings great confusion to the actual use of technicians

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  • Failure fracture cleaning method and solution for cleaning
  • Failure fracture cleaning method and solution for cleaning
  • Failure fracture cleaning method and solution for cleaning

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Embodiment Construction

[0042] The invention provides a solution for cleaning invalid fractures. Hydrochloric acid: urotropine (hexamethylenetetramine): deionized water is configured as a cleaning solution at a ratio of 1:0.1:100 to clean the fracture sample. The invention relates to the removal of corrosion products on the failure fracture surface of carbon steel materials, and prepares qualified microscopic analysis samples, belonging to the technical field of fracture analysis of failure components.

[0043] Preferably, 1000 ml of solution is prepared according to 10 ml of hydrochloric acid, 1 g of urotropine and deionized water for cleaning.

[0044] A method for cleaning invalid fractures of the present invention and a solution for cleaning, comprising the following steps:

[0045] S1. Use a soft brush to clean the sand and loose covering on the surface of the fracture;

[0046] S2. Use acetone solution and an ultrasonic cleaner to ultrasonically clean the fracture to further remove the surface...

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Abstract

The invention discloses a failure fracture cleaning method and solution for cleaning. Sediments and loose covering matters on the surfaces of fractures are cleaned; the fractures are ultrasonically cleaned to remove the covering matters and oil stains on the surfaces of the fractures; the surfaces of the fractures are coated by colloidal solution prepared by acetone and cellulose acetate; after the coated layers are totally dried, the coated layers are stripped, and the operation is repeated by multiple times to finish cleaning of the fractures; and the fractures are cleaned by adopting cleaning solution prepared through adding of water in hydrochloric acid and urotropine. The fracture cleaning formula is simple in preparation, low in cost and mild in cleaning effect, is used by combiningwith a step-by-step cleaning method by multiple times to preferably remove corrosion products for corrosion failure of the surfaces of the fractures by carbon steel materials, and meanwhile, is lowerin damage of the fractures.

Description

technical field [0001] The invention belongs to the technical field of fracture analysis of failure components, and in particular relates to a failure fracture cleaning method and a cleaning solution, which can be used to remove corrosion products on the surface of carbon steel failure fractures and prepare qualified microscopic analysis samples. Background technique [0002] Failure fracture is the most important physical evidence in fracture failure analysis, which records the whole process of fracture initiation, expansion and final fracture of components under load and service conditions. Therefore, the fracture is a direct clue to find the cause of the failure and avoid the recurrence of the same type of failure. However, in actual production, especially in failure fractures of oil and gas fields, due to the inevitable presence of corrosive media in service conditions, the fracture is often covered by a thick layer of corrosion products, which hinders the microscopic an...

Claims

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Application Information

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IPC IPC(8): C23G1/08B08B3/08B08B3/12
Inventor 韩燕赵雪会李发根吕乃欣
Owner BC P INC CHINA NAT PETROLEUM CORP
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