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region (5) increases the flow energy, whilst the tapered end (11) helps prevent disruption to the cement as the tool is withdrawn.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.

公开(公告)号：US12196062B2

公开(公告)日：2025-01-14

申请号：US18116744

申请日：2023-03-02

Applicant: CONOCOPHILLIPS COMPANY

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

IPC: E21B41/00 ,  E21B33/14 ,  E21B37/00 ,  E21B37/08

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).

公开(公告)号：US11879305B2

公开(公告)日：2024-01-23

申请号：US17406969

申请日：2021-08-19

Applicant: CONOCOPHILLIPS COMPANY

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

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

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

Abstract: The invention relates to a cementing tool for use in oil and gas well decommissioning operations, in particular so called perforate, wash and cement procedures. The tool (1) is designed for running in a well on drill string and for jetting cement through previously formed perforations in the casing (10) to fill the outer annulus (9) with cement. The tool (1) has a cylindrical wall (3) which is formed from steel (11) and elastomeric (5) elements, whereby it is expandable between a first diameter in which it may be run down the well and a second, larger diameter deployed during cementing operations.

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.

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).

公开(公告)号：US11686175B2

公开(公告)日：2023-06-27

申请号：US17406669

申请日：2021-08-19

Applicant: CONOCOPHILLIPS COMPANY

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

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

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

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.

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).