FRACTURE INITIATION WITH AUXILIARY NOTCHES
    3.
    发明申请
    FRACTURE INITIATION WITH AUXILIARY NOTCHES 审中-公开
    与辅助器具的断裂启动

    公开(公告)号:US20160201440A1

    公开(公告)日:2016-07-14

    申请号:US14595983

    申请日:2015-01-13

    CPC classification number: E21B43/26

    Abstract: Improved notching techniques are described for transverse fracture initiation from the wellbore (cased or open). One or more auxiliary notches are formed that are sealed from borehole pressure increase, yet still deformable under the fracturing pressure in the wellbore. Through the use of the auxiliary notches, lower fracturing pressure and/or shallower notches can be used when compared to known notching techniques without auxiliary notching. The described approaches can also provide greater control over the initial direction of the fracture.

    Abstract translation: 描述了用于从井筒(套管或开放)的横向断裂开始的改进的开槽技术。 形成一个或多个辅助凹口,这些凹槽与钻孔压力增加密封,但仍然在井眼中的压裂压力下变形。 通过使用辅助凹口,与没有辅助凹口的已知开槽技术相比,可以使用较低的压裂压力和/或更浅的凹口。 所描述的方法还可以对骨折的初始方向提供更大的控制。

    APPARATUS AND METHOD FOR TESTING ROCK HETEROGENEITY

    公开(公告)号:US20210048382A1

    公开(公告)日:2021-02-18

    申请号:US16543006

    申请日:2019-08-16

    Abstract: A scratch tester has at least one cutter that moves simultaneously both rotationally and axially relative to the rock it is cutting. When rotational and axial movements are constant, the cutter generates a helical groove in the rock. In borehole embodiments, the scratch tester is fixed at a desired location using centralizers, and the cutter is provided on a motorized platform/track that translates between the centralizers and rotates around a central axis. The cutter faces outward and extends via a cutter arm to engage and carve a helical groove in the borehole wall. A laboratory scratch tester includes a holder for a solid cylindrical core sample and a motorized translating frame on which a cutter extends. The cutter is directed toward the core sample, and the holder with the core sample is rotated by a motor so that as the cutter translates relative thereto, a helical groove is cut thereinto.

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