Automatic Welding, 2024, №01



2024 №01 (06)

DOI of Article 10.37434/as2024.01.07

2024 №01 (08)

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Avtomaticheskaya Svarka (Automatic Welding), #1, 2024, pp. 60-66

Peculiarities of wear and development of repair technology of drill bits

B.V. Stefaniv

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The peculiarities of wear of working bodies of housings of steel and matrix drill bits and drill heads were considered and studied, and the criteria for their reparability were determined. The degree of wear of working bodies of the landing sockets for diamond carbide cutters was investigated. The methods of preparing the worn areas of the working body for their restoration by the method of arc surfacing were optimized. Special attention was paid to studying the microstructure of the interface between the base and deposited metals: steel 45 + TeroCote 7888T composite material; steel 45 + self-fluxing steel bar Diamax M; steel 45 + tape relit LZ-11-7; VK10 hard alloy + TeroCote 7888T composite material. The structure of the TeroCote 7888T protective coating on VK10 hard alloy and steel 45 was found to provide exceptionally effective protection against corrosion and abrasive wear. On the basis of research, a technology was developed for repair of the working bodies of the blades of housings of steel and matrix drill bits, which allows extending their operational life. Steel and matrix drill bits and drill heads, after their restoration, passed industrial tests in Poltava, Kharkiv and Donetsk regions during drilling of gas and oil wells. It was established that the use of repaired drill bits when drilling oil and gas wells allows extending their life and saving 30...50% of the initial cost of a specific type of drill bit. 11 Ref., 2 Tabl., 10 Fig.
Keywords: matrix, steel bits, superhard materials, PDC-polycrystalline diamond cutter, ATP-diamond carbide cutter, PDC bits, tungsten carbides, wear resistance, abrasiveness, corrosion, microstructure, protective coatings, arc surfacing, soldering, hardness


Received: 20.11.2023
Received in revised form: 29.11.2023
Accepted: 14.12.2023

References

1. Khorunov V.F., Stefaniv B.V., Sabadash O.M. et al. (2012) Peculiarities of wear and criteria of repairability of drill bits with diamond-hard-alloy cutters. The Paton Welding J., 10, 39 - 43.
2. Materials and Services for Oilfield equipment. http://www.swedishmesteel.com/files/mr/Durmat%20Oilfield%20 Equipment.pdf
3. Materiales para soldadura WokaDur. http://sianco.com.ar/media/procesos/Folleto%20WokaDur%20web.pdf
4. Welding, brazing, coating and wearplate solutions. http://www.castolin.com
5. Zhudra, A. P. (2014) Surfacing consumables based on tungsten carbide. The Paton Welding J., 6-7, 66-71. https://doi.org/10.15407/tpwj2014.06.13
6. Zakharova, E.S., Markova, I.Yu., Maslov, A.L. et al. (2017) Morphology of powders of tungsten carbide used in wear-resistant coatings and deposition on the PDC drill bits. IOP Conf. Series: J. of Physics: Conf. Series 857 012058. https://doi.org/10.1088/1742-6596/857/1/012058
7. Markova, I.Yu., Zakharova, E.S., Maslov, A.L. et al. (2017) The study of microstructure of wear-resistant coatings applied for protection from abrasive wear of horizontal and tilt drilling drill bits. IOP Conf. Series: J. of Physics: Conf. Series 857 012028. https://doi.org/10.1088/1742-6596/857/1/012028
8. Stefaniv, B.V. (2016) Investigation of wear resistance of protective coatings under conditions of hydroabrasive wear. The Paton Welding J., 9, 26-29. https://doi.org/10.15407/tpwj2016.09.05
9. Stefaniv, B.V. (2020) Peculiarities of repair of worn areas of drill bits. The Paton Welding J., 6, 41-46. https://doi.org/10.37434/tpwj2020.06.08
10. Stefaniv, B.V., Nyrkova, L.I., Larionov, A.V., Osadchuk, S.O. (2020) Corrosion resistance of composite material deposited by TIG method using flexible cord Terocote 7888 T. The Paton Welding J., 2, 26 - 29. https://doi.org/10.37434/tpwj2020.02.05
11. Stefaniv, B.V. (2013) Development of the technology of brazing diamond-hard alloy cutters. The Paton Welding J., 2, 37-41.

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