{"id":781,"date":"2020-10-18T22:21:37","date_gmt":"2020-10-18T19:21:37","guid":{"rendered":"https:\/\/adcr.ru\/?p=781"},"modified":"2020-10-18T22:28:10","modified_gmt":"2020-10-18T19:28:10","slug":"2009-1-12","status":"publish","type":"post","link":"https:\/\/adcr.ru\/en\/2009-1-12\/","title":{"rendered":"\"REPORTER of the Association of Drilling Contractors\" N 1, 2009"},"content":{"rendered":"
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\"\"<\/strong><\/h3>\n

METHODS \u00a0OF \u00a0DEVELOPMENT \u00a0OF \u00a0PROGRAMS \u00a0FOR \u00a0CALCULATION \u00a0OF\u00a0 WELL \u00a0PROFILE \u00a0AS \u00a0A \u00a0CURVE \u00a0OF \u00a0CONSTANT \u00a0CURVATURE \u00a0AS \u00a0EXEMPLIFIED \u00a0BY \u00a0A \u00a0SYMMETRICAL \u00a0BICLOTHOID<\/p>\n

I.L. Barsky \u2013 Ph.D. in Physics and Mathematics, Leading Research Associate
A.B. Levina \u2013 Ph.D. in Physics and Mathematics, Academic Secretary
B.R. Lalayants \u2013 Postgraduate Student
R.V. Ivanychev \u2013 Head of Department
P.A. Makarov \u2013 Head of Department
OJSC NPO \u201cBurovaya Tekhnika\u201d<\/strong><\/em><\/p>\n

The growing\u00a0 complexity of geological and technological tasks to be solved\u00a0 for selection of the profile of directional and horizontal wells determines creation of advanced scientific-methodological approaches to well profile design. The article provides the rationale for designing of a profile with constant curvature according to the natural curvature of a drill string or a casing. The method is based on the use of the so-called natural equation of a curve that shows functional relationship between the curvature of the curve,\u00a0 arc length and the actual borehole depth. The authors provide an Excel format solution for the geometry of the projected well profile as a symmetrical biclothoid. The solution allows to reduce the bending stress of\u00a0\u00a0 the string in the wellbore, the friction force during drilling tool pulling and running, and to ensure stable weight on bit.<\/p>\n

Key words: curvature; curve; deviation intensity; circle equation; clothoid; biclothoid; three interval profile.<\/em><\/p>\n

METHODS \u00a0OF \u00a0DEVELOPMENT \u00a0OF \u00a0PROGRAMS \u00a0FOR \u00a0CALCULATION \u00a0OF\u00a0 WELL \u00a0PROFILE \u00a0AS \u00a0A \u00a0CURVE \u00a0OF \u00a0CONSTANT \u00a0CURVATURE \u00a0AS \u00a0EXEMPLIFIED \u00a0BY \u00a0A \u00a0SYMMETRICAL \u00a0BICLOTHOID<\/strong><\/p>\n

I.L. Barsky \u2013 Ph.D. in Physics and Mathematics, Leading Research Associate \u00a0
A.B. Levina \u2013 Ph.D. in Physics and Mathematics, Academic Secretary
B.R. Lalayants \u2013 Postgraduate Student
R.V. Ivanychev \u2013 Head of Department
P.A. Makarov \u2013 Head of Department
OAO NPO \u201cBurovaya Tekhnika\u201d<\/strong><\/em><\/p>\n

The growing\u00a0 complexity of geological and technological tasks to be solved\u00a0 for selection of the profile of directional and horizontal wells determines creation of advanced scientific-methodological approaches to well profile design. The article provides the rationale for designing of a profile with constant curvature according to the natural curvature of a drill string or a casing. The method is based on the use of the so-called natural equation of a curve that shows functional relationship between the curvature of the curve,\u00a0 arc length and the actual borehole depth. The authors provide an Excel format solution for the geometry of the projected well profile as a symmetrical biclothoid. The solution allows to reduce the bending stress of\u00a0\u00a0 the string in the wellbore, the friction force during drilling tool pulling and running, and to ensure stable weight on bit.<\/p>\n

Key words: curvature; curve; deviation intensity; circle equation; clothoid; biclothoid; three interval profile.<\/em><\/p>\n

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