..., it is necessary to evaluate and analyze its stability. This paper investigates the influences of interlayers and cavern interactions on salt cavern UGS's stability. A 3D geomechanical model of double-salt cavern UGS with interlayers is established based on the geological data and creep constitutive relation...

... amplitude shrinks with the load increasing. The first-order logarithmic decrement rate can be increased under the relatively higher load by coupling thermal and dynamic loads, but the stability margin of rotor is insufficient, which causes the instability. 1 Corresponding author. Email: wolves861108...

... on the stability of the macroemulsion. It is observed that the macroemulsion with an HLB value of 10 provides the best stability results. Using surfactant HLB value of 10, three macroemulsions with 10 wt%, 15 wt%, and 20 wt% of methanol were prepared using ultrasonication. However, only the macroemulsion with 10...

...Titus Ntow Ofei; Bjørnar Lund; Arild Saasen; Sigbjørn Sangesland Drilling fluids for oilfield use consist of complex mixtures of natural and synthetic materials. The viscous properties along with the particle size distribution of the applied weight materials are vital in controlling the stability...

...Pengfei Liu; Mingming Zhu; Zhezi Zhang; Dongke Zhang This study was aimed to understand the rheological properties and stability characteristics of biochar-algae-water (BAW) slurry fuels prepared by wet milling. A pine sawdust biochar and a chlorella vulgaris algae were used in preparing the slurry...

...M. Farahani; D. J. Y. S. Pagé; M. P. Turingia; B. D. Tucker A biodiesel storage stability study was conducted on ultralow sulfur diesel fuel (ULSDF) and three biodiesel basestocks (B100) and fuel blends (B2, B5, B10, and B20). The storage stability study consisted in measuring and monitoring...

.... The current study shows that the stability of ester-based drilling fluids at high temperature conditions depends on the composition so that the selection of proper components and additives such as emulsifiers, stabilizers, copolymers, viscosifiers, and rheological modifiers can increase the temperature...

... a methodology for reducing the number of modes representing the drill string. The frequency response function and stability diagram are used as measures of dynamic similarity between the proposed model and the drill string. We also introduce a novel approach to represent a drill string in laboratory test rigs...

... demonstrates that filter cakes containing BFS can be chemically activated to produce thin, firm cakes with improved filtration properties. These cakes should be able to form better bonds with cement subsequently used for completion. oil technology stability filtration chemical reactions chemical...

...Jonathan A. Montgomery; Hoi C. Yeung The prediction of slug formation and slug size has a direct impact on the design of topsides separation facilities and flow assurance to the process. The characteristics and stability of liquid production from an S-shaped riser have been studied over a range...

... are derived on the stability of precession and on the evolution of impacting motions towards precession. It is found that increasing coefficients of friction and contact damping have a favoring effect on precession, while the stiffness and damping of the drillstring bending mode have an opposing effect...

...Antonio C. Bannwart, Assoc. Mem. ASME A theory for the stabilization of annular liquid-liquid flow (i.e., core-annular flow) in a horizontal pipe is proposed. Based upon the analysis of the momentum conservation equation in the cross section of the flow, including the effects of peripheral flow...

...M. A. Elsayed, Mem. ASME; L. F. Washington, Mem. ASME Previous research in stability of drillstrings was based on the assumption of constant material specific force, i.e., a bit force that is proportional to the area of cut. Moreover, earlier work used a simplified bit model that consisted...

...O. Piepers; P. P. Breithaupt; A. B. N. van Beelen Stabilization of the combustion of natural gas in high-temperature processes by using the auto-ignition of the fuel when mixed with highly preheated air is well known and has found application on many occasions. Reasonably strong internal flue gas...