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Thixotropic cement slurry and placement method to cure lost circulation
Embodiments of methods for reducing lost circulation in a wellbore comprise inserting a conduit comprising a first end part and a second end part and an outer diameter and an inner diameter into the wellbore, and pumping a thixotropic cement slurry through the conduit into the wellbore, wherein the thixotropic cement slurry will increase in viscosity with no shear and decrease in viscosity with shear, and have a power law exponent value of less than or equal to 0.3 when the thixotropic cement slurry has a density of greater than 12.69 pounds per gallon, and the thixotropic cement slurry comprises at least one cement, at least one viscosifier, mix water, and one or more than one strength accelerating additives. The method further comprises allowing the thixotropic cement slurry to harden inthe wellbore to create a plug, thereby removing the conduit from the wellbore, and reducing lost circulation via the plug in the wellbore.
用于减少井筒中的井漏的方法的实施例包含将包含第一和第二端部以及外径和内径的导管插入所述井筒中，和通过所述导管将触变水泥浆料泵送到所述井筒中，其中所述触变水泥浆料将在没有剪切的情况下粘度增加并且在剪切的情况下粘度降低，并且当所述触变水泥浆料具有大于12.69磅/加仑的密度时，所述触变水泥浆料具有小于或等于0.3的幂律指数值，其中所述触变水泥浆料包含至少一种水泥、至少一种增粘剂、混合水以及一种或多于一种强度促进添加剂。所述方法另外包含允许所述触变水泥浆料在所述井筒中硬化以形成塞子，从所述井筒中移除所述导管，和经由所述井筒中的所述塞子减少井漏。
Thixotropic cement slurry and placement method to cure lost circulation
Embodiments of methods for reducing lost circulation in a wellbore comprise inserting a conduit comprising a first end part and a second end part and an outer diameter and an inner diameter into the wellbore, and pumping a thixotropic cement slurry through the conduit into the wellbore, wherein the thixotropic cement slurry will increase in viscosity with no shear and decrease in viscosity with shear, and have a power law exponent value of less than or equal to 0.3 when the thixotropic cement slurry has a density of greater than 12.69 pounds per gallon, and the thixotropic cement slurry comprises at least one cement, at least one viscosifier, mix water, and one or more than one strength accelerating additives. The method further comprises allowing the thixotropic cement slurry to harden inthe wellbore to create a plug, thereby removing the conduit from the wellbore, and reducing lost circulation via the plug in the wellbore.
用于减少井筒中的井漏的方法的实施例包含将包含第一和第二端部以及外径和内径的导管插入所述井筒中，和通过所述导管将触变水泥浆料泵送到所述井筒中，其中所述触变水泥浆料将在没有剪切的情况下粘度增加并且在剪切的情况下粘度降低，并且当所述触变水泥浆料具有大于12.69磅/加仑的密度时，所述触变水泥浆料具有小于或等于0.3的幂律指数值，其中所述触变水泥浆料包含至少一种水泥、至少一种增粘剂、混合水以及一种或多于一种强度促进添加剂。所述方法另外包含允许所述触变水泥浆料在所述井筒中硬化以形成塞子，从所述井筒中移除所述导管，和经由所述井筒中的所述塞子减少井漏。
Thixotropic cement slurry and placement method to cure lost circulation
触变水泥浆料和固化井漏的填筑方法
SHINE JOSEPH (author)
2020-06-05
Patent
Electronic Resource
Chinese
THIXOTROPIC CEMENT SLURRY AND PLACEMENT METHOD TO CURE LOST CIRCULATION
| European Patent Office | 2019
Thixotropic cement slurry and placement method to cure lost circulation
| European Patent Office | 2020
THIXOTROPIC CEMENT SLURRY AND PLACEMENT METHOD TO CURE LOST CIRCULATION
| European Patent Office | 2019
Thixotropic cement slurry and placement method to cure lost circulation
| European Patent Office | 2019
THIXOTROPIC CEMENT SLURRY AND PLACEMENT METHOD TO CURE LOST CIRCULATION
| European Patent Office | 2020