Invention Grant
- Patent Title: Cement and anti-corrosion fluid for casing isolation
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Application No.: US16903796Application Date: 2020-06-17
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Publication No.: US11448052B2Publication Date: 2022-09-20
- Inventor: Sara A. Alkhalaf , Bandar AlMalki , Chinthaka Gooneratne , Abdullah Al-Yami
- Applicant: SAUDI ARABIAN OIL COMPANY
- Applicant Address: SA Dhahran
- Assignee: SAUDI ARABIAN OIL COMPANY
- Current Assignee: SAUDI ARABIAN OIL COMPANY
- Current Assignee Address: SA Dhahran
- Agency: Osha Bergman Watanabe & Burton LLP
- Main IPC: E21B43/16
- IPC: E21B43/16 ; C09K8/467

Abstract:
A method for cementing a wellbore, including pumping a volume of an anti-corrosion fluid comprising at least one corrosion inhibitor into a casing and displacing the anti-corrosion fluid into an annular space outside the casing with a volume of cement. A displacement fluid may then be injected into the casing to displace the cement into the annular space, wherein a combined volume of cement and anti-corrosion fluid fills the annular space along a height of the casing. A height of the cemented annular space may be less than the height of the casing, the anti-corrosion fluid being retained in the annular space axially above a cemented annular space, forming an anti-corrosion fluid annular space. Partially cementing in this manner may simultaneously protect the casing from corrosion while allowing easier workover operations proximate the anti-corrosion fluid annular space.
Public/Granted literature
- US20210396108A1 CEMENT AND ANTI-CORROSION FLUID FOR CASING ISOLATION Public/Granted day:2021-12-23
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