Method and apparatus for establishing injection into a cased bore hole using a time delay toe injection apparatus
    5.
    发明授权
    Method and apparatus for establishing injection into a cased bore hole using a time delay toe injection apparatus 有权
    使用延时脚趾注射装置建立注射入套筒钻孔的方法和装置

    公开(公告)号:US09121252B2

    公开(公告)日:2015-09-01

    申请号:US14012089

    申请日:2013-08-28

    CPC classification number: E21B34/108 E21B34/063 E21B2034/007

    Abstract: An apparatus and method for providing a time delay in injection of pressured fluid into a geologic formation. In one aspect the invention is a toe valve activated by fluid pressure that opens ports after a predetermined time interval to allow fluid to pass from a well casing to a formation. The controlled time delay enables casing integrity testing before fluid is passed through the ports. This time delay also allows multiple valves to be used in the same well casing and provide a focused jetting action to better penetrate a concrete casing lining.

    Abstract translation: 一种用于在压力流体注入地质层中提供时间延迟的装置和方法。 在一个方面,本发明是通过流体压力激活的脚趾阀,其在预定时间间隔之后打开端口,以允许流体从井套管传递到地层。 受控的时间延迟使流体通过端口之前的套管完整性测试成为可能。 这种延时还允许在同一井套管中使用多个阀,并提供聚焦的喷射作用以更好地穿透混凝土外壳衬里。

    Constant entrance hole perforating gun system and method

    公开(公告)号:US10774624B2

    公开(公告)日:2020-09-15

    申请号:US16285406

    申请日:2019-02-26

    Abstract: A shaped charge comprising a case, a liner positioned within the case, and an explosive filled within the case. The liner is shaped with a subtended angle ranging from 100° to 120° about an apex, a radius, and an aspect ratio such that a jet formed with the explosive creates an entrance hole in a well casing. The jet creates a perforation tunnel in a hydrocarbon formation, wherein a diameter of the jet, a diameter of the entrance hole diameter, and a width and length of the perforation tunnel are substantially constant and unaffected with changes in design and environmental factors such as a thickness and composition of the well casing, position of the charge in the perforating gun, position of the perforating gun in the well casing, a water gap in the wellbore casing, and type of the hydrocarbon formation.

    Reverse flow catch-and-engage tool and method

    公开(公告)号:US09617826B2

    公开(公告)日:2017-04-11

    申请号:US15200677

    申请日:2016-07-01

    CPC classification number: E21B34/14 E21B43/14 E21B43/26 E21B2034/007

    Abstract: A catch-and-engage tool conveyed with a well casing for use in a wellbore comprising an outer housing having flow ports therethrough, a functioning apparatus disposed within the outer housing comprising a movable member/sleeve and a holding device, a blocking apparatus disposed within the outer housing comprising a blocking member configured to block one or more flow ports in a first position, a seating apparatus positioned upstream of the blocking apparatus configured to form a seat in the tool. When a ball deployed into the well casing passes through the tool in a downstream direction and moves back in an upstream direction, the restriction element engages onto the holding device and moves the movable member such that a port in exposed to uphole pressure and the blocking member travels to a second position in a reverse direction unblocking flow ports and enabling fluid communication to the wellbore.

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