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The Effect of Carbon Nanotubes on th...

Li, Xin.

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The Effect of Carbon Nanotubes on the Rheology and Mechanical Properties of Lightweight Cements.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Effect of Carbon Nanotubes on the Rheology and Mechanical Properties of Lightweight Cements./
作者:	Li, Xin.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	114 p.
附註:	Source: Masters Abstracts International, Volume: 57-01.
Contained By:	Masters Abstracts International57-01(E).
標題:	Petroleum engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10682589
ISBN:	9780355516197

The Effect of Carbon Nanotubes on the Rheology and Mechanical Properties of Lightweight Cements.
Li, Xin.

The Effect of Carbon Nanotubes on the Rheology and Mechanical Properties of Lightweight Cements. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 114 p.

Source: Masters Abstracts International, Volume: 57-01.

Thesis (M.S.)--The University of Tulsa, 2017.

Oil wells drilled in weak and fragile formations should be cemented by lightweight cement slurries to avoid downhole fractures caused by heavy slurry and to minimize lost circulation. Conventional cement composite is a strong material with low elasticity due to its brittle nature. Lightweight cement sheath exhibits higher ductility than conventional cement because its air-solid structure is able to tolerate more deformation when downhole stress condition changes. The addition of foam and microspheres into conventional cement introduces higher elasticity, it also reduces the strength properties.

ISBN: 9780355516197Subjects--Topical Terms:

566616
Petroleum engineering.

The Effect of Carbon Nanotubes on the Rheology and Mechanical Properties of Lightweight Cements.
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245 1 4 $a The Effect of Carbon Nanotubes on the Rheology and Mechanical Properties of Lightweight Cements.
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500 $a Advisers: Stefan Miska; Nicholas Takach.
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520 $a Oil wells drilled in weak and fragile formations should be cemented by lightweight cement slurries to avoid downhole fractures caused by heavy slurry and to minimize lost circulation. Conventional cement composite is a strong material with low elasticity due to its brittle nature. Lightweight cement sheath exhibits higher ductility than conventional cement because its air-solid structure is able to tolerate more deformation when downhole stress condition changes. The addition of foam and microspheres into conventional cement introduces higher elasticity, it also reduces the strength properties.
520 $a In this study, multi-walled carbon nanotubes were employed to compensate for strength reduction caused by foam and microspheres in cement composites. The goal of this study is to evaluate the mechanical properties of CNT reinforced lightweight cements under tri-axial conditions. Rheological properties of various cement systems were measured.
520 $a Compressive strength and Young's modulus of lightweight cements were measured under the confining pressures of 0, 500 psi and 1000 psi. Permeability and porosity tests were conducted on various cement systems. The strength properties of cement specimens were evaluated by their compressive strength and splitting tensile strength. Several failure criteria were applied to describe cement failure mechanism. Young's modulus, ultimate strain capacity and brittleness index were measured and calculated for the analysis of cement elastic properties. A scanning electron microscope was used for the comparison of micro structures among cement systems and prove the bridging mechanism of carbon nanotubes in cement composite.
520 $a As shown in experimental results, the addition of carbon nanotubes improves the strength and elastic properties of various cement systems without significantly affecting their rheological properties. Carbon nanotubes function as nano-bridges and nano-fillers to help reinforce cement composite and plug the mico pores and cracks for hydrocarbon to flow through.
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