ConocoPhillips patented a method for milling windows in oil or gas well casings. The process involves using a wireline tool to create a small window initially, followed by a heavy-duty coil tubing tool to expand it. This innovation addresses challenges faced in previous methods, ensuring efficient casing integrity during the milling process. GlobalData’s report on ConocoPhillips gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on ConocoPhillips, HBV (Hepatitis B Virus) peptides was a key innovation area identified from patents. ConocoPhillips's grant share as of May 2024 was 79%. Grant share is based on the ratio of number of grants to total number of patents.

Method for milling windows in oil or gas well casing

Source: United States Patent and Trademark Office (USPTO). Credit: ConocoPhillips

A recently granted patent (Publication Number: US12000226B2) discloses a method for milling a window in the casing of an oil or gas well. The method involves running a whipstock into the well, followed by using a first milling tool with an extendable actuator arm to grip the casing and mill away a portion of the casing material at the milling site. Subsequently, a second milling tool is used to further mill away material from the casing until a window of the required dimension is achieved. The first milling tool does not penetrate the full thickness of the casing and can create windows of various lengths, while the actuator arm's extension length can also be adjusted.

Additionally, the method involves circulating fluid during milling to remove milled swarf efficiently. The first milling tool is capable of milling a specific volume of casing steel, ranging from 10 to 100 in3, depending on the requirements of the operation. The patent outlines the detailed process of milling a window in the casing using specific tools and techniques, ensuring precision and control over the dimensions of the window created. This innovative method offers a practical solution for creating windows in oil or gas well casings, allowing for improved access and functionality in well operations.

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GlobalData’s Patent Analytics tracks patent filings and grants from official offices around the world. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.