Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Elastic and tough cement paste and preparation method thereof
The invention discloses elastic and tough cement paste and a preparation method thereof. The cement paste comprises 1000 parts of G-grade cement; 40 to 50 parts of silica powder; 150 to 200 parts of quartz sand; 25 to 30 parts of a fluid loss agent; 40 to 50 parts of an ultrafine material; 25 to 35 parts of an expanding agent; 8 to 12 parts of a drag reducer; 2 to 3 parts of a retarder; 15 to 20 parts of early strength agent; 40 to 45 parts of an elastic agent; and 20 to 25 parts of a toughening agent. The cement paste system provided by the invention has good stress strain resistance, lower Young modulus and higher impact toughness, and can generate corresponding deformation capacity when being applied to a well cementation cement sheath, thereby reducing the occurrence of annulus microgaps; the Young modulus of a cement slurry system reduces the load transfer coefficient, and the stress environment of the casing pipe can be optimized; damage of jarring, fracture acidizing, fluid density change in a shaft and the like in the drilling process to a cement sheath can be reduced or prevented, and air channeling caused by cement sheath breakage is reduced.
本发明公开了一种弹韧性水泥浆体及其制备方法，其中水泥浆体包括G级水泥1000份；硅微粉40份～50份；石英砂150份～200份；降失水剂25份～30份；超细材料40份～50份；膨胀剂25份～35份；减阻剂8份～12份；缓凝剂2份～3份；早强剂15份～20份；弹性剂40份～45份；增韧剂20份～25份。本发明的水泥浆体系具有良好的抗应力应变能力，较低的杨氏模量和较高的抗冲击韧性，应用到固井水泥环时能产生相应的形变能力，减小环空微间隙的发生；水泥浆体系的杨氏模量降低载荷传递系数，能优化套管的受力环境；能减小或防止钻井过程中的震击、压裂酸化、井筒内流体密度变化等对水泥环的破坏，减小因水泥环破裂引起的空气窜。
Elastic and tough cement paste and preparation method thereof
The invention discloses elastic and tough cement paste and a preparation method thereof. The cement paste comprises 1000 parts of G-grade cement; 40 to 50 parts of silica powder; 150 to 200 parts of quartz sand; 25 to 30 parts of a fluid loss agent; 40 to 50 parts of an ultrafine material; 25 to 35 parts of an expanding agent; 8 to 12 parts of a drag reducer; 2 to 3 parts of a retarder; 15 to 20 parts of early strength agent; 40 to 45 parts of an elastic agent; and 20 to 25 parts of a toughening agent. The cement paste system provided by the invention has good stress strain resistance, lower Young modulus and higher impact toughness, and can generate corresponding deformation capacity when being applied to a well cementation cement sheath, thereby reducing the occurrence of annulus microgaps; the Young modulus of a cement slurry system reduces the load transfer coefficient, and the stress environment of the casing pipe can be optimized; damage of jarring, fracture acidizing, fluid density change in a shaft and the like in the drilling process to a cement sheath can be reduced or prevented, and air channeling caused by cement sheath breakage is reduced.
本发明公开了一种弹韧性水泥浆体及其制备方法，其中水泥浆体包括G级水泥1000份；硅微粉40份～50份；石英砂150份～200份；降失水剂25份～30份；超细材料40份～50份；膨胀剂25份～35份；减阻剂8份～12份；缓凝剂2份～3份；早强剂15份～20份；弹性剂40份～45份；增韧剂20份～25份。本发明的水泥浆体系具有良好的抗应力应变能力，较低的杨氏模量和较高的抗冲击韧性，应用到固井水泥环时能产生相应的形变能力，减小环空微间隙的发生；水泥浆体系的杨氏模量降低载荷传递系数，能优化套管的受力环境；能减小或防止钻井过程中的震击、压裂酸化、井筒内流体密度变化等对水泥环的破坏，减小因水泥环破裂引起的空气窜。
Elastic and tough cement paste and preparation method thereof
一种弹韧性水泥浆体及其制备方法
ZHANG XINGCAI (Autor:in)
23.05.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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