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    Setting a cement plug
    1.
    发明授权
    Setting a cement plug 有权

    公开(公告)号：US12123279B2

    公开(公告)日：2024-10-22

    申请号：US17407021

    申请日：2021-08-19

    Applicant: CONOCOPHILLIPS COMPANY

    Inventor： Lars Hovda ,  Dan Mueller ,  James C. Stevens ,  Amal Phadke

    IPC: E21B33/14 ,  E21B33/13 ,  E21B37/00 ,  E21B41/00

    CPC classification number: E21B33/14 ,  E21B33/13 ,  E21B37/00 ,  E21B41/0078

    Abstract: The invention relates to a cementing tool (1) and method for setting a cement plug. Instead of the conventional “balanced plug”, the technique involves pumping cement whilst pulling and rotating the tool. The cementing tool (1) includes nozzles (9) for jetting cement which are located in a relatively narrow region (8) of the tool and a larger diameter choke region (5) proximal of the nozzles (9). The end of the tool (11) is closed off and tapered. The tool is passed down the well to a location where it is desired to set a plug, then cement is injected whilst rotating and withdrawing the tool. The jets of cement help displace existing fluid in the well thereby reducing mixing of the existing fluid with the cement, The choke region (5) increases the flow energy, whilst the tapered end (11) helps prevent disruption to the cement as the tool is withdrawn. The choke region (5) may be expandable to allow the tool to pass through a cased part of the well and then set a plug in an under-reamed open hole part of the well.

    Behind casing wash and cement
    4.
    发明授权
    Behind casing wash and cement 有权

    公开(公告)号：US11608718B2

    公开(公告)日：2023-03-21

    申请号：US17462598

    申请日：2021-08-31

    Applicant: CONOCOPHILLIPS COMPANY

    Inventor： Rick Watts ,  Stein Haavardstein ,  Lars Hovda ,  James C. Stevens ,  Dan Mueller ,  Brett Borland ,  Amal Phadke ,  Praveen Gonuguntla

    IPC: E21B37/00 ,  E21B41/00

    Abstract: The invention relates to a method of conducting a perf wash cement (“P/W/C”) abandonment job in an offshore oil or gas well annulus (2), in particular the washing or cementing operation using a rotating head (6, 8) with nozzles (7, 9) dispensing wash fluid or cement at pressure. Certain values of parameters of a washing or cementing job have been found surprisingly to affect the quality of the job, or the degree to which they affect the quality of the job has been unexpected. These include including rotation rate of the tool, the direction of translational movement of the tool, and the volume flow rate and pressure per nozzle of cement or wash fluid (and hence nozzle size).

    Behind casing wash and cement
    6.
    发明授权
    Behind casing wash and cement 有权

    公开(公告)号：US12139997B2

    公开(公告)日：2024-11-12

    申请号：US18316030

    申请日：2023-05-11

    Applicant: CONOCOPHILLIPS COMPANY

    Inventor： Lars Hovda ,  Dan Mueller ,  James C. Stevens ,  Amal Phadke ,  Praveen Gonuguntla

    IPC: E21B33/13 ,  E21B33/14 ,  E21B37/00 ,  E21B41/00

    Abstract: The invention relates to a method of conducting a perf wash cement (“P/W/C”) abandonment job in an offshore oil or gas well annulus, in particular the washing or cementing operation using a rotating head with nozzles dispensing wash fluid or cement at pressure. A new design of bottom hole assembly is proposed in which the cementing tool has a relatively large diameter in order to optimize pressure whilst the wash tool has a relatively small diameter. The wash process, for a number of reasons, appears to be less sensitive to tool diameter and making the wash tool smaller reduces the overall risk of stuck pipe.

    Tool for metal plugging or sealing of casing
    7.
    发明授权
    Tool for metal plugging or sealing of casing 有权

    公开(公告)号：US11441384B2

    公开(公告)日：2022-09-13

    申请号：US16999802

    申请日：2020-08-21

    Applicant: ConocoPhillips Company

    Inventor： David D. Hearn ,  Casey Hirschmann ,  Randall S. Shafer ,  Stewart M. Robertson ,  Dan Mueller

    IPC: E21B33/13 ,  E21B29/10 ,  E21B29/02 ,  H01L25/065 ,  H01L25/00 ,  H01L27/11556 ,  H01L27/11565 ,  H01L27/1157 ,  H01L27/11573 ,  H01L27/11582 ,  E21B33/12 ,  E21B36/00 ,  H01L23/00

    Abstract: This disclosure describes a device and method of sealing perforations on a well casing inside a subterranean well. The device comprises a generally cylindrical sleeve having an open top and a closed bottom; a heater located inside the sleeve, the heater comprising a thermite mixture; an ignition mechanism that ignites the thermite mixture upon actuation; and a string connected to the heater ignition and detachably engages the sleeve. The method comprises lowering a body of meltable plugging material into the well casing near the perforations; lowering the plugging device into the well casing immediately on top of the body of meltable plugging material; melting the meltable plugging material by igniting the thermite thereby transferring heat to the body of meltable plugging material; forcing the molten plugging material into the perforations by pushing the plugging tool further downhole; cooling the plugging tool and the plugging material until the plugging material solidifies; disengaging the tubing string from the sleeve and retrieving the tubing string with the heater; and removing the sleeve and bismuth remaining in the well casing, but not in the perforations.

    Behind casing wash and cement
    8.
    发明授权
    Behind casing wash and cement 有权

    公开(公告)号：US11136862B2

    公开(公告)日：2021-10-05

    申请号：US16529892

    申请日：2019-08-02

    Applicant: CONOCOPHILLIPS COMPANY

    Inventor： Rick Watts ,  Stein Haavardstein ,  Lars Hovda ,  James C. Stevens ,  Dan Mueller ,  Brett Borland ,  Amal Phadke ,  Praveen Gonuguntla

    IPC: E21B41/00 ,  E21B37/00

    Abstract: The invention relates to a method of conducting a perf wash cement (“P/W/C”) abandonment job in an offshore oil or gas well annulus (2), in particular the washing or cementing operation using a rotating head (6, 8) with nozzles (7, 9) dispensing wash fluid or cement at pressure. Certain values of parameters of a washing or cementing job have been found surprisingly to affect the quality of the job, or the degree to which they affect the quality of the job has been unexpected. These include including rotation rate of the tool, the direction of translational movement of the tool, and the volume flow rate and pressure per nozzle of cement or wash fluid (and hence nozzle size).

    Tool for metal plugging or sealing of casing
    9.
    发明授权
    Tool for metal plugging or sealing of casing 有权

    公开(公告)号：US10760374B2

    公开(公告)日：2020-09-01

    申请号：US15706071

    申请日：2017-09-15

    Applicant: ConocoPhillips Company

    Inventor： David D. Hearn ,  Casey Hirschmann ,  Randall S. Shafer ,  Stewart M. Robertson ,  Dan Mueller

    IPC: E21B33/13 ,  E21B29/10 ,  E21B29/02 ,  E21B33/12 ,  E21B36/00

    Abstract: This disclosure describes a device and method of sealing perforations on a well casing inside a subterranean well. The device comprises a generally cylindrical sleeve having a open top and a closed bottom; a heater located inside the sleeve, the heater comprising a thermite mixture; an ignition mechanism that ignites the thermite mixture upon actuation; and a string connected to the heater ignition and detachably engages the sleeve. The method comprises lowering a body of meltable plugging material into the well casing near the perforations; lowering the plugging device into the well casing immediately on top of the body of meltable plugging material; melting the meltable plugging material by igniting the thermite thereby transferring heat to the body of meltable plugging material; forcing the molten plugging material into the perforations by pushing the plugging tool further downhole; cooling the plugging tool and the plugging material until the plugging material solidifies; disengaging the tubing string from the sleeve and retrieving the tubing string with the heater; and removing the sleeve and bismuth remaining in the well casing, but not in the perforations.

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