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《Oil Drilling & Production Technology》 1997-03
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Gong Wei'an  
The parameters equation of parabolic section special curves of deviated wellswere set up applying the column matching method and calculation equations of well curvatureand bending deflection. Based on the principles of differential geometry, the "Foot plane ofdog-leg" raised by Lubinski was demonstrated not being existent. Therefore the three-dimensional analysis of drill pipe assembly and casing stabilizers deduced are not accurate. Theauthor considered that the different calculation methods present are all approximate becauseof their underestimation of the degree of the practical deviation of the well. The paper recommends taking a strictly controlled value of direction drift of deviated well in standardization of technical specifications and provision with a special trail of borehole to the drilling andproduction operation contractors.
【CateGory Index】: TE2
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