Hydromechanical Behavior of a Tuff/Bentonite Mixture Treated with Cement
Demdoum, Abdellah; Daheur, Elhadj Guesmia; Loualbia, Hamza; Bounouara, Zahra; Ghembaza, Moulay Smaine; Akgün, Haluk (2022-01-01)
© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Sandy soil-clay mixtures are commonly used as a liner/barrier material in various engineering applications, such as construction of hydraulic and waste containment. In this study, the hydromechanical characteristics of tuff-bentonite and tuff-bentonite/cement mixtures are investigated to propose a local barrier material. A series of free swelling, one-dimensional consolidation and falling head permeability tests for hydrauli...
Economical impact of a dual gradient drilling system
Peker, Merter; Parlaktuna, Mahmut; Department of Petroleum and Natural Gas Engineering (2012)
Dual Gradient Drilling (DGD) system is a promising technology that was developed to overcome the deep water drilling problems occurred due to narrow operating window between pore pressure and fracture pressure. In conventional drilling practice, single mud weight exists from drilling unit to TVD (True Vertical Depth) which creates big hydrostatic pressure in bottom hole ,moreover, minor changes in mud weight results a big pressure changes proportional to the length of hydrostatic column increase with water ...
Calibration and Testing of Digital ZenithCamera System Components
Halicioglu, Kerem; Uluğ, Raşit; Albayrak, Muge; Deniz, Rasim; Ozludemir, M.Tevfik (2017-03-01)
Starting from the beginning of the new millennium, thanks to the Charged-Coupled Device (CCD) technology, fully or partly automatic zenith camera systems are designed and used in order to determine astro-geodetic deflections of the vertical components in several countries, including Germany, Switzerland, Serbia, Latvia, Poland, Austria, China and Turkey. The Digital Zenith Camera System (DZCS) of Turkey performed successful observations yet it needs to be improved in terms of automating the system and incre...
Wellbore temperature assessment for generic deepwater well in Blacksea and mitigation of hydrate dissociation risk
Öztürk, M Tarık; Parlaktuna, Mahmut; Department of Petroleum and Natural Gas Engineering (2011)
Drilling operation expanded through deep water environments starting from mid-1980. As water depth increased, hydrate bearing formation in the shallow ocean floor is observed and that started to cause problems during drilling and production operations. Problems due to hydrate dissociation and forming during operations are also reported by the companies working in those environments many times. Although there are several factors affect the dissociation of shallow hydrate bearing sediments, heat flux from dee...
Trajectory estimation in directional drilling using bottom hole assembly(bha) analysis
Doğay, Serkan; Kök, Mustafa Verşan; Department of Petroleum and Natural Gas Engineering (2007)
The aim of this study is to combine the basic concepts of mechanics on drill string which are related to directional drilling, thus finding a less complicated and more economical way for drilling directional wells. Slick BHA, which has no stabilizers attached and single stabilizer BHA are analyzed through previously derived formulas gathered from the literature that are rearranged for this study. An actual directional well is redrilled theoretically with a slick BHA and a computer program is assembled for c...
Citation Formats
H. AKGUN and J. DAEMEN, “CEMENTITIOUS SEAL DESIGN IN WELDED TUFF,” 1993, p. 363, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65187.