The Paton Welding Journal, 2015, №08



2015 №08 (09)

DOI of Article 10.15407/tpwj2015.08.10

2015 №08 (11)

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The Paton Welding Journal, 2015, #8, 47-50 pages
 

Peculiarities of restoration of working parts of drilling bit matrix bodies

B.V. Stefaniv, V.F. Khorunov, O.M. Sabadash, S.V. Maksymova And V.V. Voronov

E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
Peculiarities of defects of worn-out matrix drilling bits, occurred during service, were considered. The degree of wear of working parts of seats under diamond-hard-alloy cutters was investigated. Methods of preparation of worn-out areas of working parts for their restoration by arc surfacing were optimized. It is shown that to restore the defective areas of crosspieces of holes of diamond-hard-alloy cutters of body blades, alloy of Kh20N80 grade was recommended as the best one, while TeroCote 7888T alloy was the best one for hole substrates. It was found that protective coating TeroCote 7888T deposited on alloy VK10, provides the most effective protection from erosive and abrasive wears. Basing on the obtained data, the technology of restoration of working parts of blades of matrix bit bodies has been developed. These bits after their restoration were transferred to the customer and at present they are passing the industrial trials at the enterprise of the Poltava region in drilling gas and oil wells. 7 Ref., 4 Figures.
 
Keywords: drilling matrix bits, superhard materials, microstructure, protective coating, wear resistance, arc surfacing, hardness
 
Received:                08.04.15
Published:               13.10.15
 
 
References

1. Stefaniv, B.V., Khorunov, V.F., Sabadash, O.M. et al. (2014) Features of reconditioning steel drill bit watercourse. The Paton Welding J., 11, 50-54.
2. Materials for brazing and surfacing TeroCote: http: //www.castolin.com.ua/
3. Surfacing materials BAT-Servis: http://www. btrans.com.ua/qw/id/79/
4. Surfacing alloy relite of L3 type: http://www.resource@aranei.com
5. DP Service repaired 13 drill bits of KUBGAZ: http: //www.dp-service.com.ua/ru/nefterynok-magazine
6. 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.
7. Khorunov, V.F., Stefaniv, B.V., Sabadash, O.M. et al. (2012) Specifics of repair technologies of drill bits with diamond-hard-alloy cutters. In: Transact. on results obtained in 2010-2012, 488-493. Kiew: PWI.

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