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公开(公告)号：US20240263520A1
公开(公告)日：2024-08-08
申请号：US18434998
申请日：2024-02-07
Applicant: CONOCOPHILLIPS COMPANY
Inventor： Lars HOVDA , Ole JENSEN
IPC: E21B7/06
CPC classification number: E21B7/061
Abstract: Drilling a sidetrack in an open hole bore in a hydrocarbon reservoir of acid-soluble formation, e.g. carbonate formation, the creation of a sidetrack (11) in an open hole bore (10 for production of hydrocarbons from a carbonate rock formation (2). Acid is delivered to the location (6) where a sidetrack is to be created; the acid dissolves away the formation and creates a trench (7) from which the sidetrack (11) may be drilled.
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公开(公告)号：US20230332480A1
公开(公告)日：2023-10-19
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
CPC classification number: E21B33/14 , E21B41/0078 , E21B37/00 , E21B33/13
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.
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公开(公告)号：US20230228173A1
公开(公告)日：2023-07-20
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
CPC classification number: E21B41/0078 , 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).
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公开(公告)号：US20220056780A1
公开(公告)日：2022-02-24
申请号：US17407021
申请日：2021-08-19
Applicant: CONOCOPHILLIPS COMPANY
Inventor： Lars HOVDA , Dan MUELLER , James C. STEVENS , Amal PHADKE
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.
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