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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vdgtu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Дагестанского государственного технического университета. Технические науки</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of Dagestan State Technical University. Technical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6185</issn><issn pub-type="epub">2542-095X</issn><publisher><publisher-name>Daghestan State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21822/2073-6185-2022-49-1-149-155</article-id><article-id custom-type="elpub" pub-id-type="custom">vdgtu-1049</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СТРОИТЕЛЬСТВО И АРХИТЕКТУРА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BUILDING AND ARCHITECTURE</subject></subj-group></article-categories><title-group><article-title>Исследование свойств цемента для тампонирования нефтяных скважин</article-title><trans-title-group xml:lang="en"><trans-title>Study of cement properties for plugging oil wells</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1293-7090</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Саламанова</surname><given-names>М. Ш.</given-names></name><name name-style="western" xml:lang="en"><surname>Salamanova</surname><given-names>M. Sh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Саламанова Мадина Шахидовна, кандидат технических наук, доцент, институт строительства, архитектуры и дизайна, кафедра технологии строительного производства</p><p>364051, г. Грозный, пр. Исаева,100, </p><p>364051, г. Грозный, Старопромысловское шоссе, 21</p></bio><bio xml:lang="en"><p>Madina Sh. Salamanova, Cand. Sci. (Eng.), Assoc. Prof., Institute of Construction, Architecture and Design, Department of Construction Production Technology</p><p>100 Kh. Isaev Ave., Grozny, 364051,</p><p>21 Staropromyslovskoe highway, Grozny 364051</p></bio><email xlink:type="simple">madina_salamanova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Грозненский государственный нефтяной технический университет имени академика М.Д. Миллионщикова;&#13;
Комплексный научно-исследовательский институт имени Х.И. Ибрагимова Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M.D. Millionshchikov Grozny State Oil Technical University;&#13;
Kh. Ibragimov Complex Institute of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>20</day><month>05</month><year>2022</year></pub-date><volume>49</volume><issue>1</issue><fpage>149</fpage><lpage>155</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Саламанова М.Ш., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Саламанова М.Ш.</copyright-holder><copyright-holder xml:lang="en">Salamanova M.S.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestnik.dgtu.ru/jour/article/view/1049">https://vestnik.dgtu.ru/jour/article/view/1049</self-uri><abstract><sec><title>Цель</title><p>Цель. Цементирование нефтяных и газовых скважин на достаточно большой глубине и при высоких температурах достаточно сложный и энергоемкий процесс, требующий использования специального цемента. Обзорный материал по тампонажным цементам подтверждает ответственность выбора этого вяжущего, способного гарантировать безопасный процесс бурения, тампонирования и эксплуатации нефтяных скважин. Приводится классификация тампонажного цемента, ведь известно, что при цементации свободного пространства в скважине, специалисты сталкиваются с различными сложностями, связанными с температурными перепадами, разностью плотностей в земной коре.</p></sec><sec><title>Метод</title><p>Метод. Исследования проводились согласно нормативным документам ГОСТ 310.3-76 Цементы. Методы определения нормальной густоты, сроков схватывания и равномерности изменения объема; ГОСТ 1581-2019 Портландцементы тампонажные. Технические условия; ГОСТ 310.4-81 Цементы. Методы определения предела прочности при изгибе и сжатии.</p></sec><sec><title>Результат</title><p>Результат. Исследованы свойства тампонажного цемента ПЦТ-I-100, для замедления схватывания растворной смеси на 10 – 14 часов, в вяжущую систему вводили с водой затворения добавки замедлители «Сульфацел» и «НТФ». Результаты исследований показали, что использование добавок замедлителей затормозило твердение системы в первые 10 часов, но после схватывания, цементный камень ускоренно добрал недостающую прочность. Водопотребность тампонажного цемента достаточно высокая 33–35%, что является обязательным для получения подвижной растворной смеси с учетом закачки ее насосами в пространство нефтяной скважины</p></sec><sec><title>Вывод</title><p>Вывод. Назначение тампонажного цемента подтверждает всю ответственность и важность подбора вяжущей связки тампонирования скважин и определяется различными факторами, и в частности, гидрогеологическим условиями, температурой, уровнем грунтовых вод в пластах земной коры.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objective</title><p>Objective. Cementing oil and gas wells at a sufficiently large depth and at high temperatures is a rather complex and energy-intensive process that requires the use of special cement. The review material on oil well cements confirms the responsibility of choosing this binder, which can guarantee the safe process of drilling, plugging and operating oil wells. The classification of well cement is given, because it is known that when cementing free space in a well, specialists face various difficulties associated with temperature changes, density differences in the earth's crust.</p></sec><sec><title>Method</title><p>Method. The studies were carried out in accordance with the normative documents GOST 310.3-76 Cements. Methods for determining normal density, setting time and uniformity of volume change; GOST 1581- 2019 Oil-well portland cements. Specifications; GOST 310.4-81 Cements. Methods for determining the ultimate strength in bending and compression.</p></sec><sec><title>Result</title><p>Result. The properties of grouting cement PCT-I100 were studied, to slow down the setting of the mortar mixture for 10-14 hours, additives "Sulfatsel" and "NTF" retarders were introduced into the binder system with mixing water. The research results showed that the use of retardant additives slowed down the hardening of the system in the first 10 hours, but after setting, the cement stone quickly gained the missing strength. The water demand of oil well cement is quite high 33–35%, which is mandatory for obtaining a mobile mortar mixture, taking into account its injection by pumps into the space of an oil well</p></sec><sec><title>Conclusion</title><p>Conclusion. The purpose of grouting cement confirms the responsibility and importance of selecting a binder for plugging wells and is determined by various factors, in particular, hydrogeological conditions, temperature, groundwater level in the layers of the earth's crust.</p></sec><sec><title> </title><p> </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>тампонажный цемент</kwd><kwd>замедлители</kwd><kwd>сроки схватывания</kwd><kwd>активность</kwd><kwd>цементный камень</kwd><kwd>нефтяные скважины</kwd><kwd>тонкость помола</kwd></kwd-group><kwd-group xml:lang="en"><kwd>oil well cement</kwd><kwd>retarders</kwd><kwd>setting time</kwd><kwd>activity</kwd><kwd>cement stone</kwd><kwd>oil wells</kwd><kwd>fineness of grinding</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Белоусов Г.А. 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