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- Title
FEATURES OF RECONDITIONING STEEL DRILL BIT WATERCOURSE.
- Authors
STEFANIV, B. V.; KHORUNOV, V. F.; SABADASH, O. M.; MAKSYMOVA, S. V.; VORONOV, V. V.
- Abstract
Peculiarities of defects in worn steel drill bit developing in service at gas well drilling are considered, damage at anomalous wear of water course moving element is described; methods to prepare the worn section for its reconditioning by welding and protective coating deposition are tried out. Special attention is given to analysis of microstructure and chemical inhomogeneity of joint line of steel 40Kh + protective wear-resistant coating, stainless steel 08Kh18N10T + protective wear-resistant coating, stainless steel 08Kh18N10T + steel 40Kh + protective wear-resistant coating; deposited layer microhardness is determined. It is shown that deposition of wear-resistant coating by surfacing provides effective protection from erosive and abrasive wear of bits at drilling of medium and hard rock. Proceeding from the derived data, technology of reconditioning the water course moving element of this drill bit was developed. The drill bit has successfully passed trials at drilling of gas and oil wells in soft, medium-hard and hard rocks in the company «Representative Office USEIS SA» in Poltava region.
- Subjects
GAS well drilling; PROTECTIVE coatings; MICROSTRUCTURE; WEAR resistance; OIL wells; FRETTING corrosion
- Publication
Paton Welding Journal, 2014, Issue 11, p50
- ISSN
0957-798X
- Publication type
Article
- DOI
10.15407/tpwj2014.11.10