«Onshore and offshore oil and gas well construction»

WAYS OF OPTIMIZING THE PROCESS OF PRE-LOADING WHEN DEEPENING THE CASING-SHOE SEAT OF THE SUPPORTS OF THE JACK-UP DRILLING RIGS (JUDR)

UDC: 622.242.4
DOI: 10.33285/0130-3872-2021-8(344)-44-47

Authors:

¹ Umid Babek Operating Company, Baku, Republic of Azerbaijan

Keywords: deepening of the casing-shoe seat, supports of the jack-up drilling rigs (JUDR), Preloading, formation, depth

Annotation:

It is known that one of the key problems when placing the jack-up drilling rig at the design point is the placing of the drilling rig supports to the required depth in the pre-loading mode. In those cases when there is a likelihood of falling down or rapid penetration of supports into the formation, the key problem is the correct regulation of the support loading regime and control over the process of their placement. The paper analyzes the existing incidents associated with the failure of the supports into the formation and the ways of the mode optimization of the supports loading are studied. For the first time, one of the approaches to reducing the risks of supports falling down is presented, which consists in optimizing the preloading mode.

Bibliography:

1. ISO 19905-1. Site-specific assessment of mobile offshore units - Part 1: Jack-ups. - International Organization of Standardization, 2016. - 330 p.
2. Guidelines for site specific assessment of mobile jackup units / Society of Naval Architects and Marine Engineers // Technical and Research Bulletin. - New Jersey: SONA Engineers, 2008. - No 5-5A, Rev. 2.
3. Yamaguchi H. Practical formula of bearing value for two layered ground // Proc. of the 2nd Asian Regional Conference on Soil Mechanics and Foundation Engineering. - Tokyo, Japan: Japanese Society of Soil Mechanics and Foundation Engineering, 1963. - Vol. 1. - P. 176-180.
4. Mehryar Z., Hu Y. Numerical study of spudcan foundation penetrating into layered soils // Proc. of the ASME 2005. Int. Conf. on Offshore Mechanics and Arctic Engineering, Halkidiki, Greece, June 12-17. - 2005. - DOI: 10.1115/OMAE2005-67447
5. Madhav M.R., Sharma J.S.N. Bearing capacity of clay overlain by stiff soil // J. of Geotechnical Engineering. - 1991. - Vol. 117, Issue 12. - P. 1941-1948. - :12(1941) DOI: 10.1061/(ASCE)0733-9410(1991)117
6. Jingbin Zheng, Hossain M.S., Dong Wang. New Design Approach for Spudcan Penetration in Nonuniform Clay with an Interbedded Stiff Layer // J. of Geotechnical and Geoenvironmental Engineering. - 2015. - Vol. 141, Issue 4. - DOI: 10.1061/(ASCE)GT.1943-5606.0001282
7. A random forest model for the prediction of spudcan penetration resistance in stiff-over-soft clays / Pan Gao, Zhihul Liu, Ji Zeng [et al] // Polish Maritime Research. - 2020. - Vol. 27, Issue 4. - P. 130-138. - DOI: 10.2478/pomr-2020-0073
8. Hajiyev N. Criteria the assessment of suitability Jack-Up rig to project site. - Lambert Academic Publishing, 2020. - 68 p.
9. Михалюк А.В., Захаров В.В. Релаксационные эффекты в динамике грунтов и горных пород // Прикладная механика и техническая физика. - 2000. - Т. 41, № 3 (241). - С. 202-212.
10. Энциклопедия по машиностроению XXL. Оборудование, материаловедение, механика и гипсокартонные листы. - URL: https://mash-xxl.info
11. Светлицкий В.А. Механика стержней: учеб.для вузов в 2 ч. Ч. 1. Статика. - М.: Высшая шк., 1987. - 320 с.