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    Unfoldable device for controlling loss circulation
    6.
    发明授权
    Unfoldable device for controlling loss circulation 有权

    公开(公告)号：US11674070B1

    公开(公告)日：2023-06-13

    申请号：US17959542

    申请日：2022-10-04

    Applicant: Saudi Arabian Oil Company

    Inventor： Simone Musso ,  Ashok Santra ,  Sivaprakash Shanmugam

    IPC: C09K8/035 ,  E21B21/00 ,  E21B33/138

    CPC classification number: C09K8/035 ,  E21B21/003 ,  E21B33/138

    Abstract: Embodiments of the disclosure provide an unfoldable device for controlling lost circulation in a target lost circulation zone in a borehole. The unfoldable device includes a sheet, a backbone, and a shell. The sheet has an unfolded state and a folded state. The backbone reinforces the sheet. The backbone includes a shape-memory material having an original state and a deformed state. The shell encapsulates the sheet in the folded state and the backbone in the deformed state. In some embodiments, the shell includes a degradable polymer that degrades in the borehole upon contact with a drilling fluid such that the sheet transitions to the unfolded state and the backbone transitions to the original state. The sheet in the unfolded state accumulates on a borehole wall at least partially covering an entrance to a macrochannel of the target lost circulation zone.

    CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE
    8.
    发明申请
    CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE 有权

    公开(公告)号：US20220144703A1

    公开(公告)日：2022-05-12

    申请号：US17523295

    申请日：2021-11-10

    Applicant: Saudi Arabian Oil Company

    Inventor： Simone Musso ,  Sivaprakash Shanmugam

    IPC: C04B24/26 ,  C09K8/473 ,  C04B22/06 ,  C08L51/10 ,  C08F220/06

    Abstract: Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, improved expanding capabilities and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, and an expanding agent. The expanding agent comprising at least a poly(acrylic acid)-metal oxide nanocomposite, where the metal oxide comprises MgO, CaO, or both, and the poly(acrylic acid) comprises a t-butyl terminal group, an isobornyl terminal group, or both.

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