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    Mechanical jar, method and system
    2.
    发明授权
    Mechanical jar, method and system 有权

    公开(公告)号：US11846152B2

    公开(公告)日：2023-12-19

    申请号：US17412629

    申请日：2021-08-26

    申请人： James Smith

    发明人： James Smith

    IPC分类号： E21B31/107 ,  E21B23/08 ,  E21B23/00 ,  E21B31/113

    CPC分类号： E21B31/107 ,  E21B23/006 ,  E21B23/08 ,  E21B31/113

    摘要： A mechanical jar including a housing, a piston disposed in the housing and responsive to applied fluid pressure to move in a first direction relative to the housing, a biasing arrangement disposed in the housing and configured to bias the piston in a second direction opposite the first direction, and a restraint configured to prevent movement of the piston in the second direction until a threshold force is applied to the restraint by the piston, whereafter the piston suddenly moves in the second direction.

    Predetermined Load Release Device for a Jar
    4.
    发明申请
    Predetermined Load Release Device for a Jar 有权

    公开(公告)号：US20230133516A1

    公开(公告)日：2023-05-04

    申请号：US18089090

    申请日：2022-12-27

    申请人： Robert W. Evans

    发明人： Robert W. Evans

    IPC分类号： E21B31/107

    摘要： A release device for a jarring tool includes a collet positioned between the mandrel of the jarring tool and a trigger sleeve. At least one end of the collet is in contact with a precompressed spring via a bushing. In order for the jarring tool to operate, a force greater than the precompressed force of the spring must be applied to the mandrel so that the collet can move in axial direction against the spring thereby releasing the mandrel.

    Downhole pressure wave generating device
    5.
    发明授权
    Downhole pressure wave generating device 有权

    公开(公告)号：US11459856B2

    公开(公告)日：2022-10-04

    申请号：US17010446

    申请日：2020-09-02

    申请人： Optimum Petroleum Services Inc.

    发明人： James G. Gettis

    IPC分类号： E21B37/00 ,  E21B28/00 ,  E21B43/00 ,  E21B34/06 ,  E21B37/08 ,  E21B1/00 ,  E21B31/113 ,  E21B43/26 ,  E21B1/38 ,  E21B31/107

    摘要： A device for generating pressure waves in a well or a wellbore. The device includes a housing containing an impact-generating mechanism for generating the pressure waves and a connector for connecting the housing to a conveyor for transporting the device to any desired location within the well or the wellbore. The device may be used for a number of downhole applications such as cleaning perforations, fracturing processes, vibration of a casing to prevent fluid flow in a cemented annulus, hydraulic jar operations for freeing stuck downhole objects, generating data to optimize pumping parameters and as an enhancement to percussion drilling techniques.

    Release Lugs for a Jarring Device
    6.
    发明申请
    Release Lugs for a Jarring Device 有权

    公开(公告)号：US20220136355A1

    公开(公告)日：2022-05-05

    申请号：US17576088

    申请日：2022-01-14

    申请人： Robert W. Evans

    发明人： Robert W. Evans

    IPC分类号： E21B31/113 ,  E21B23/00 ,  E21B31/107

    摘要： A release mechanism for a jarring tool is formed by a plurality of segmented release lugs. Each lug includes a plurality of axial spaced projections on an inner surface and a plurality of grooves on an outer surface. The projections have either different widths or are separated by varying distances and releaseably engage corresponding grooves in a mandrel located within a housing of the tool. The release lugs are positioned between a trigger sleeve and the mandrel.

    FREEING STUCK SUBTERRANEAN SERVICE TOOLS
    7.
    发明申请
    FREEING STUCK SUBTERRANEAN SERVICE TOOLS 有权

    公开(公告)号：US20210363848A1

    公开(公告)日：2021-11-25

    申请号：US16879872

    申请日：2020-05-21

    申请人： Chevron U.S.A. Inc.

    发明人： Paul Aaron Price

    IPC分类号： E21B31/107 ,  E21B34/06 ,  E21B29/00

    摘要： An assembly disposed within a subterranean wellbore can include a first dislodging tool coupled to a bottom end of a tubing string, wherein the first dislodging tool, when enabled at a first time, performs a first action to free at least one service tool, disposed below the first dislodging tool in the subterranean wellbore, from being stuck.

    Release lugs for a jarring device
    8.
    发明授权
    Release lugs for a jarring device 有权

    公开(公告)号：US11105169B2

    公开(公告)日：2021-08-31

    申请号：US16534778

    申请日：2019-08-07

    申请人： Robert W. Evans

    发明人： Robert W. Evans

    IPC分类号： E21B31/107 ,  E21B23/00

    摘要： A release mechanism for a jarring tool is formed by a plurality of segmented release lugs. Each lug includes a plurality of axial spaced projections on an inner surface and a plurality of grooves on an outer surface. The projections have either different widths or are separated by varying distances and releasably engage corresponding grooves in a mandrel located within a housing of the tool. The release lugs are positioned between a trigger sleeve and the mandrel. The release lugs may be supported by an annular ring member.

    Release lugs for a jarring device
    10.
    发明授权
    Release lugs for a jarring device 审中-公开

    公开(公告)号：US10669800B2

    公开(公告)日：2020-06-02

    申请号：US16168610

    申请日：2018-10-23

    申请人： Evans Engineering & Manufacturing Inc.

    发明人： Robert W. Evans

    IPC分类号： E21B31/107 ,  E21B31/113 ,  E21B23/00

    摘要： A release mechanism for a jarring tool is formed by a plurality of segmented release lugs. Each lug includes a plurality of axial spaced projections on an inner surface and a plurality of grooves on an outer surface. The projections have either different widths or are separated by varying distances and releaseably engage corresponding grooves in a mandrel located within a housing of the tool. The release lugs are positioned between a trigger sleeve and the mandrel.