China Petrochemical has been granted a patent for a new sliding sleeve designed for oil and gas well completion and reservoir stimulation. The innovative design includes features such as a flow guiding hole, grooves for engagement with tooth-shaped elements, and an erosion-resistant ring for enhanced durability. GlobalData’s report on China Petrochemical 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 China Petrochemical, AI assisted CAD was a key innovation area identified from patents. China Petrochemical's grant share as of January 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.

New sliding sleeve for oil and gas well completion

Source: United States Patent and Trademark Office (USPTO). Credit: China Petrochemical Corp

A newly granted patent (Publication Number: US11885201B2) discloses a novel sliding sleeve design comprising an upper connector, lower connector, outer housing, inner sleeve, and shear pin. The inner sleeve can open or close a flow guiding hole in the outer housing, with grooves for engaging with tooth-shaped elements on a sliding sleeve opening tool. Additionally, erosion-resistant rings are embedded in the grooves to enhance durability. The inner sleeve may consist of two parts connected by welding or threading, with provisions for sealing rubber barrels and retaining rings to ensure proper functioning. Various movable elements and structures like clamp rings, positioning rings, and sealing rings are incorporated to maintain the integrity of the sliding sleeve during operation. Pressure relief holes and dissolvable structures made of different materials are strategically placed to facilitate the functioning of the sliding sleeve.

Furthermore, the patent details the inclusion of open/close structures like arched position-limiting elastic pieces and anchor-fluke position-limiting elastic pieces to secure the inner sleeve in position when opening or closing the flow guiding hole. Different types of grooves, such as L-shaped and J-shaped grooves, are utilized to block the shear pin effectively. The design also includes specific angles and inclinations in the slots and grooves to optimize the functionality of the sliding sleeve. Overall, the patent outlines a comprehensive and innovative sliding sleeve design with multiple features and components aimed at improving performance and reliability in various applications.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.