OJSC "Tatneft" continues to work on the legal protection of their developments abroad. At the beginning of October this year from Canadian Patent Office received a patent number 2501400 for the invention "Device for setting the profile liner in the hole."
The invention relates to drilling and workover operations and is intended in particular for the expansion and calibration of the device shaped tubes having cylindrical ends with threads, when installed in the well. Application of the invention provides increased efficiency and reliability while expanding their device structures made of profiled tube.
The inventors are the specialists of JSC "Tatneft": GS Abdrahmanov, H. Z. Kaveev, R. Ibatullin, IG Yusupov, N. H. Hamityanov, AV Kirshin, A. Yagafarov , RG Abdrahmanov, L. Yunyshev, NN Vildanov.
Earlier this design was patented in the United States, China and the European Patent (Germany, UK).