Petroleum Engineering最新文献

{"title":"EFFECT OF BACK PRESSURE DURING DIRECT PRESETTING OF ALLOY LBTPN D16T","authors":"D.V. Kashaev, B. V. Kargin, V. Zhivaeva, P. Bukin","doi":"10.17122/ngdelo-2024-1-44-52","DOIUrl":"https://doi.org/10.17122/ngdelo-2024-1-44-52","url":null,"abstract":"Pipes made of high-strength aluminum alloys with protector thickeners in the middle and at the ends are actively used in the construction of wells for oil and gas. Their light weight and sufficient strength make it possible to build wells of greater depth from lower lifting capacity installations. In addition, aluminum alloy pipes of keyless construction are widely used in cases where there is a high content of carbon dioxide and hydrogen sulfide. This design and material make it possible to significantly increase the service life of pipes in aggressive, corrosive environments. In order to increase the production speed of pipes, it is proposed to use the technology of direct compression with back pressure. You can simulate the manufacturing process using this technology of LBTPN (alloy drill pipe of increased reliability) using a specialized software complex DEFORM, which was done. These aluminum pipes are used in the development of ultra-deep gas and oil wells, as well as horizontal and inclined extended reach wells. LBTPNs were also used in the drilling of ultra-deep Kola, Kryvyi Rih, and Ural wells. It is possible to use compressed pipes with back pressure if the design depth of the well is more than 3000 m. During pressing in the plastic deformation focus, stress transformation is observed: normal growth and drop of tangents and, therefore, a decrease in their total impact; increased level of hydrostatic pressure, all components of deformations and, therefore, also their total impact. Unlike the non-backpressure process, when present and under its action in the gage zone, there is a significant decrease in longitudinal tensile forces, as a result it is possible to carry out the process with higher values of alloy flow rates. Also, pipes made of aluminum alloys of a lock-free design are widely used in cases where there is a high content of carbon dioxide and hydrogen sulfide. This design and material can significantly increase the service life of pipes.","PeriodicalId":515328,"journal":{"name":"Petroleum Engineering","volume":"11 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140412874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH AND IMPROVEMENT OF THE QUALITY OF OIL AND GAS WELL KILLING TECHNOLOGY THROUGH THE USE OF VISCOELASTIC COMPOSITIONS","authors":"E. Shakirova, E. Averkina, N. A. Averkin, M. V. Semykin, A.A. Aleksandrov","doi":"10.17122/ngdelo-2024-1-15-24","DOIUrl":"https://doi.org/10.17122/ngdelo-2024-1-15-24","url":null,"abstract":"Currently, many enterprises of the oil and gas industry are faced with such a problem as a significant decrease in the productivity coefficient of the well after repair work. As a result of such a complication, the process of normalization of the bottom of absorbing wells becomes more difficult, and the period of underground repair increases. The most developing direction in well jamming technology is the use of viscoelastic compositions, since this method eliminates the risk of penetration of the jamming fluid into the collector. Viscoelastic compositions are solutions of crosslinked polymers in the form of elastic gels with high viscosity and high shear stress. The compositions injected into the well limit the penetration of the jamming fluid into the bottom-hole zone of the formation and preserve its reservoir properties. The prepared formulations should take the form of a filling volume and gradually harden over a given time, but not turn into a solid composition.But, despite the high efficiency of using viscoelastic mixtures, this method of jamming has negative sides: premature structuring of the mixture, failure of downhole pumping equipment. The reason for this is the heterogeneous composition of the viscoelastic mixture. The choice of formulations for conducting a complex of laboratory studies implies work to determine the effective type of blocking composition and the choice of reagent brands.To clarify the conditions for the effective use of viscoelastic formulations and cooking technologies, an analysis of domestic and foreign experience in their application was carried out.During the research, optimal formulations of viscoelastic mixtures were selected that meet the requirements of well jamming technology at the «X» field. These samples are capable of forming strong cross-linked plugs that do not change the strength characteristics of the structure over time. To remove the composition of the silencing fluid from the borehole, the technology of dispersing viscoelastic mixtures using a hydroperite destructor was tested. After the introduction of the destructor, the ionic bonds of the composition are destroyed, which leads to a decrease in viscosity to minimum values and the possibility of its complete removal from the formation.","PeriodicalId":515328,"journal":{"name":"Petroleum Engineering","volume":"6 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140414753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}