{"id":283,"date":"2020-10-18T18:44:15","date_gmt":"2020-10-18T15:44:15","guid":{"rendered":"https:\/\/adcr.ru\/?p=283"},"modified":"2020-10-18T18:44:50","modified_gmt":"2020-10-18T15:44:50","slug":"2020-2-3","status":"publish","type":"post","link":"https:\/\/adcr.ru\/en\/2020-2-3\/","title":{"rendered":"\"Bulletin of the Association of Drilling Contractors\" \u21162, 2020"},"content":{"rendered":"
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\"\"<\/strong><\/h3>\n

INFLUENCE OF THE DRILL STRING SPATIAL FORM ON TRANSPORT OF CUTTINGS IN DIRECTIONAL WELLS<\/strong>

Kadochnikov V.G. \u2013 postgraduate student of the St. Petersburg Mining University,
kadochnikov93@gmail.com kadochnikov93@gmail.com<\/a>
Dvoynikov M.V. \u2013 Doctor of Technical Sciences, Professor, Head of the Department of Well Drilling, St. Petersburg Mining University, dvoinik72@gmail.com dvoinik72@gmail.com<\/a>
Blinov P.A. \u2013 Candidate of Technical Sciences, Associate Professor, St. Petersburg Mining University,
blinovpavel@mail.ru blinovpavel@mail.ru<\/a>
<\/em><\/strong>
\u0423\u0414\u041a 622.244.4 + 622.24.084.3

Key words: <\/strong>drilling parameters; transport of cuttings; loss of stability; buckling; directional well; well cleaning.

The paper argues in favor of studying controlling influence of sinusoidal buckling in a drill string on cuttings and sludge removal from a directional well. It introduces an experimental test facility developed in the laboratory of Well Drilling Department, St. Petersburg Mining University, and presents a detailed procedure of the experimental study. The paper also gives results of a full-scale multi-factorial experiment that showed how intensity and quality of cleaning a well from cuttings and sludge depends on the value of several parameters, such as: flow rate and rheological properties of a cleaning agent, rotation rate and number of half waves occurring due to longitudinal bending of the drill string.<\/p>\n

INFLUENCE OF THE DRILL STRING SPATIAL FORM ON TRANSPORT OF CUTTINGS IN DIRECTIONAL WELLS<\/strong>

Kadochnikov V.G. \u2013 postgraduate student of the St. Petersburg Mining University, kadochnikov93@gmail.com<\/a>
Dvoynikov M.V.  \u2013 Doctor of Technical Sciences, Professor, Head of the Department of Well Drilling, St. Petersburg Mining University, dvoinik72@gmail.com<\/a>
Blinov P.A. \u2013 Candidate of Technical Sciences, Associate Professor, St. Petersburg Mining University, blinovpavel@mail.ru<\/a>
<\/em><\/strong>
<\/em><\/strong>Key words: <\/strong>drilling parameters; transport of cuttings; loss of stability; buckling; directional well; well cleaning.

The paper argues in favor of studying controlling influence of sinusoidal buckling in a drill string on cuttings and sludge removal from a directional well. It introduces an experimental test facility developed in the laboratory of Well Drilling Department, St. Petersburg Mining University, and presents a detailed procedure of the experimental study. The paper also gives results of a full-scale multi-factorial experiment that showed how intensity and quality of cleaning a well from cuttings and sludge depends on the value of several parameters, such as: flow rate and rheological properties of a cleaning agent, rotation rate and number of half waves occurring due to longitudinal bending of the drill string.<\/p>\n

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