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Yu R.,Shanghai Hilong Oil Country Tubular Goods Research Institute | Yuan P.,Shanghai Hilong Oil Country Tubular Goods Research Institute
Advanced Materials Research | Year: 2011

This paper introduces the principles and techniques of intelligent drilling which can be considered as a computer intelligent expert system with intelligent drill tools and information network system as the key technologies. In this paper, we have discussed the key technology of how to combine power transmission and high speed bidirectional information transmission "information superhighway" with drill tools, and also have introduced the design and development of intelligent drill tools specifically which Hilong company who possesses the independent intellectual property rights. © (2011) Trans Tech Publications.


Yuan P.-B.,Shanghai Hilong Oil Country Tubular Goods Research Institute | Guo S.-W.,Shanghai Hilong Oil Country Tubular Goods Research Institute | Lu S.-L.,China University of Petroleum - Beijing
Corrosion and Protection | Year: 2010

Investigation had been carried out on oil pipeline corrosion in Kenneyak Oilfield. Based on macro and micro corrosion morphology analysis, material mechanical property tests and chemical composition analysis, it is showed that the corrosion on the coupling external wall was induced by environmental hydrogen damage in which ITS corrosion is dominating, including exfoliation corrosion, internal hydrogen induced cracking (HIC) and stress oriented hydrogen induced cracking (SOHIC) resulted in fracture. The pipeline made up of high strength low alloy (HSLA) steels like SM90SS with hardness less than HRC22 tends to SOHIC in sour service environment. The results may help to prevent pipeline from corrosion perforation and/or cracking, and keep the safety of oil well.


Yuan P.-B.,Shanghai Hilong Oil Country Tubular Goods Research Institute | Guo S.-W.,Shanghai Hilong Oil Country Tubular Goods Research Institute | Lv S.,CAS Institute of Electrical Engineering
Materials Performance | Year: 2010

Macro and micro corrosion morphology analysis, material mechanical property tests, and chemical composition analysis showed that the corrosion on a well tubing coupling induced by environmental hydrogen damage is discussed. No corrosion pits, however, were noted on the inner surface of the tubing pipe body, and the outside and inside diameters of the tubing pipe body did not present obvious change. The cracks were found on the bottom of the corrosion pits after clearing out the pits. The micro holes were unusually round and had different dimensions and cracks per analysis by scanning electron microscopy (SEM). The corrosion was concentrated mainly at the coupling, and was more severe at the coupling field end than at the mill end because of corrosion media and tubing structure. The tubing coupling corrosion was caused mainly by H2S and HIC, and fracture was caused by SOHIC.

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