会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明授权
    • Fluid loss control in oil field cements
    • 油田水泥中的流体损失控制
    • US4480693A
    • 1984-11-06
    • US565158
    • 1983-12-23
    • John C. NewloveRobert C. PortnoyDonald N. SchulzKissho Kitano
    • John C. NewloveRobert C. PortnoyDonald N. SchulzKissho Kitano
    • C04B24/22C09K8/035C09K8/46C09K8/487C09K8/508E21B33/138
    • C09K8/5083C04B24/22C09K8/035C09K8/46C09K8/487C04B2103/46
    • The present invention relates to materials which reduce the filtration of fluid into permeable earth formations during cementing processes in the drilling and completing of subterranean wells, particularly wells for the recovery of petroleum resources.Petroleum well cementing is the process of mixing a slurry of cement, water, and other additives and pumping it down through steel casing to critical points in the oil well annulus around the casing or in the open hole below the casing string. The primary functions of the cementing process are to restrict fluid movement between geological formations and to bond and support the casing. In addition the cement aids in protecting the casing from corrosion, preventing blowouts by quickly sealing formations, protecting the casing from shock loads in drilling deeper wells, and sealing off lost circulation or thief zones.A common problem in petroleum well cementing is the flow of liquid from the cement slurry into porous earth formations in contact with the cement. This fluid loss is undesirable since it can result in dehydration of the cement slurry, and it causes thick filter cakes of cement solids which can plug the well bore. The fluid lost can damage sensitive formations. Cement fluid loss is particularly a problem in the process known as squeeze cementing.There is a requirement, therefore, for materials which, when added to the cement formulation, reduce the loss of fluid from the slurry to porous formations.
    • 本发明涉及在钻井和完井地下井,特别是用于回收石油资源的井的固井过程中减少流体过滤到渗透性地层中的材料。 石油井固井是将水泥,水和其他添加剂的浆料混合并通过钢壳抽吸到套管周围的油井环面或套管柱下方的开孔中的临界点的过程。 固井过程的主要功能是限制地质构造之间的流体运动并粘结和支撑套管。 此外,水泥有助于保护套管免受腐蚀,通过快速密封地层来防止井喷,保护套管免受钻井深井的冲击负荷,并密封泄漏的流通或小偷区域。 石油井固化中的一个常见问题是液体从水泥泥浆流到与水泥接触的多孔地层中。 这种流体损失是不期望的,因为它可能导致水泥浆料的脱水,并且它引起可以堵塞井眼的粘固固体的厚滤饼。 损失的液体会损坏敏感地层。 在已知的挤压固井过程中,水泥流失特别是一个问题。 因此,对于添加到水泥配方中的材料,需要减少流体从浆料到多孔地层的损失。