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Expression of the self-sharpening mechanism of a roller cone bit during wear due to the influence of the erosion protection carbide coating
ID Šporin, Jurij (Author), ID Mrvar, Primož (Author), ID Janc, Blaž (Author), ID Vukelić, Željko (Author)

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Abstract
Roller cone drill bits are used in drilling larger diameter wells. The drilling efficiency of the roller cone drill bit depends on the wear rate of the materials that forms bit teeth, which crushes the rock at the bottom of the well. To prevent excessive wear, research has largely focused on the study and determination of abrasion-resistant materials. In our work, we investigated the wear mechanism of a roller cone drill bit whose wear-resistant teeth are protected by a hard metal coating welded onto the teeth. The difference between material properties of erosion-protective carbide coating and the tooth steel leads to uneven wear of bit teeth. In order to determine the material changes, we carried out detailed studies of the rock through which drilling was carried out, the drilling parameters and the materials of which the roller cone bit is made. The principle of wear of the tooth materials and their carbide coating, determined by our research, indicated the guidelines which could be basis for the development of abrasion-resistant materials could be carried out, as well as the problem of applying an erosion protection to the teeth of the studied type of roller cone bits.

Language:English
Keywords:carbide coating, erosion effect, micro channel, disintegration, drilling
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:NTF - Faculty of Natural Sciences and Engineering
Publication status:Published
Publication version:Version of Record
Year:2021
Number of pages:15 str.
Numbering:Vol. 11, iss. 11, art. 1308
PID:20.500.12556/RUL-136433 This link opens in a new window
UDC:622
ISSN on article:2079-6412
DOI:10.3390/coatings11111308 This link opens in a new window
COBISS.SI-ID:83235075 This link opens in a new window
Publication date in RUL:04.05.2022
Views:679
Downloads:91
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Record is a part of a journal

Title:Coatings
Shortened title:Coatings
Publisher:MDPI AG
ISSN:2079-6412
COBISS.SI-ID:523035673 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:01.11.2021

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