Differential iron roughneck
    3.
    发明授权

    公开(公告)号:US11313185B2

    公开(公告)日:2022-04-26

    申请号:US16785859

    申请日:2020-02-10

    Abstract: A differential iron roughneck for making or breaking a pipe connection includes: at least one first gripping cylinder for delivering torque to a first pipe; at least one second gripping cylinder for delivering and receiving torque to and from a second pipe; and a differential gearbox including: a primary shaft delivering torque to the at least one first gripping cylinder; and a secondary shaft receiving torque from the at least one second gripping cylinder, where the primary shaft and the secondary shaft rotate at different speeds.

    DIFFERENTIAL IRON ROUGHNECK
    4.
    发明申请

    公开(公告)号:US20210246741A1

    公开(公告)日:2021-08-12

    申请号:US16785859

    申请日:2020-02-10

    Abstract: A differential iron roughneck for making or breaking a pipe connection includes: at least one first gripping cylinder for delivering torque to a first pipe; at least one second gripping cylinder for delivering and receiving torque to and from a second pipe; and a differential gearbox including: a primary shaft delivering torque to the at least one first gripping cylinder; and a secondary shaft receiving torque from the at least one second gripping cylinder, where the primary shaft and the secondary shaft rotate at different speeds.

    Method and apparatus for cementing a casing in a wellbore

    公开(公告)号:US11661816B2

    公开(公告)日:2023-05-30

    申请号:US16874773

    申请日:2020-05-15

    CPC classification number: E21B33/16

    Abstract: A method of cementing a casing in a wellbore extending from an Earth's surface into a subsurface includes providing a tube having a bi-frustoconical shape. The bi-frustoconical shape is defined by an upper tube part having an inverted frustoconical shape, a lower tube part having a frustoconical shape, and a waist intermediate between the upper tube part and the lower tube part. The tube is positioned in an annulus formed between the casing and a wall of the wellbore from a surface opening of the annulus. The tube is urged in a direction down the annulus and along the casing until the tube lands on a collar radially projecting from an outer surface of the casing into the annulus.

    METHOD AND APPARATUS FOR CEMENTING A CASING IN A WELLBORE

    公开(公告)号:US20210355783A1

    公开(公告)日:2021-11-18

    申请号:US16874773

    申请日:2020-05-15

    Abstract: A method of cementing a casing in a wellbore extending from an Earth's surface into a subsurface includes providing a tube having a bi-frustoconical shape. The bi-frustoconical shape is defined by an upper tube part having an inverted frustoconical shape, a lower tube part having a frustoconical shape, and a waist intermediate between the upper tube part and the lower tube part. The tube is positioned in an annulus formed between the casing and a wall of the wellbore from a surface opening of the annulus. The tube is urged in a direction down the annulus and along the casing until the tube lands on a collar radially projecting from an outer surface of the casing into the annulus.

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