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Information × Registration Number 0220U101014, 0119U101239 , R & D reports Title Development of new methods for improving of reliability and durability of the flexible pipes for gas and oil extraction by the coiled tubing technologies popup.stage_title Head Syrotiuk Andrii M., Доктор технічних наук Registration Date 30-01-2020 Organization Karpenko Physico-Mechanical Institute of NASU popup.description2  The basic experimental dependences "length of surface fracture defect - number of load cycles", which are obtained on the basis of series of tests GT with outer diameter of 38.10 mm and wall thickness of 2.95 mm, made of QT-800 steel (σВ = 696 MPa, σТ = 620 MPa, ε = 30%), in media, in particular in the NS4 groundwater model solution, drilling fluids of different composition and purpose. Criteria for evaluating the health and durability of GT coils are established, which are based on the approaches of fracture mechanics, in particular, the criterion of safe operation at the marginal rate of growth of existing cracks and the risk criterion of fragile catastrophic destruction. Product Description popup.authors Barna Roman A. Vovk Roman I. Syrotiuk Andrii M. popup.nrat_date 2020-04-02 Close