Cutting a sidetrack window
    72.
    发明授权

    公开(公告)号:US11725458B2

    公开(公告)日:2023-08-15

    申请号:US17492262

    申请日:2021-10-01

    CPC classification number: E21B7/046 E21B7/061 E21B29/06

    Abstract: A sidetracking method includes lowering a sidetrack assembly to a target zone of a wellbore comprising a casing. The sidetrack assembly comprising a cutting tool coupled to a wellbore string and a whipstock releasably coupled to the cutting tool. The method includes setting the whipstock on a wall of the wellbore, pulling the wellbore string, decoupling the cutting tool from the whipstock, actuating the cutter, cutting along a cut profile of the casing to cut free a portion of the casing at the target zone, actuating the mechanical fasteners, fastening the portion of the casing to the cutting tool, pulling the wellbore string, detaching the portion of the casing from the wall of the wellbore, drilling, with a directional drill string a sidetrack wellbore extending from the window to a downhole location of the sidetrack wellbore, and removing the whipstock from the wellbore.

    SYSTEM AND METHOD FOR BAYESIAN GEOSTEERING
    73.
    发明公开

    公开(公告)号:US20230243214A1

    公开(公告)日:2023-08-03

    申请号:US18162255

    申请日:2023-01-31

    CPC classification number: E21B7/04 E21B44/00

    Abstract: In some aspects, a computing device may obtain information relating to a location of a bottom hole assembly (BHA) in a wellbore. The computing device may generate a probability matrix responsive to the information, wherein the probability matrix comprises a plurality of probabilities each of which corresponds to a probability of the BHA's location relative to a geological formation. The computing device may determine, responsive to the probability matrix, a BHA location that has a highest probability. Numerous other aspects are described.

    Directional well trajectory control method based on drill pipe drive

    公开(公告)号:US11692397B2

    公开(公告)日:2023-07-04

    申请号:US17241591

    申请日:2021-04-27

    CPC classification number: E21B7/04 E21B44/02 E21B49/003

    Abstract: Disclosed is a directional well trajectory control method based on drill pipe drive, the method including the following steps: parameters down-transmission, determining the offset vector, closed loop control of eccentric ring rotation angle, and well parameter closed-loop control; this method can achieve three-dimensional well trajectory control without frequent trips during drilling operations, and has a high penetration rate, good wellbore cleaning effect, well trajectory control accuracy, high flexibility, low tripping times, high borehole quality, high safety, etc., which is suitable for the development of special process wells such as medium-deep wells, ultra-deep wells, ultra-thin oil layer horizontal wells and unconventional oil and gas wells in China's complex oil and gas reservoirs. This method can also achieve precise control of well trajectory, and overcome the shortcomings of existing control methods that cannot achieve closed-loop control and cannot remove interference signals.

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