China National Offshore Oil has been granted a patent for a core detection device for coring instruments. The device includes a base body with a core channel and a core switch mechanism. The mechanism consists of a detection portion, a connecting rod assembly, and a travel switch. When a core passes through the core channel, it pushes the detection portion to rotate, triggering the travel switch. The device also includes an elastic member to reset the connecting rod assembly after the core passes through. The core switch mechanism adopts a slider-connecting rod structure. GlobalData’s report on China National Offshore Oil 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 National Offshore Oil, AI assisted CAD was a key innovation area identified from patents. China National Offshore Oil's grant share as of September 2023 was 64%. Grant share is based on the ratio of number of grants to total number of patents.

Core detection device for coring instrument with switch mechanism

Source: United States Patent and Trademark Office (USPTO). Credit: China National Offshore Oil Corp

A recently granted patent (Publication Number: US11739603B2) describes a core detection device for a coring instrument. The device includes a base body and a core switch mechanism. The core switch mechanism consists of a detection portion, a connecting rod assembly, and a travel switch. The detection portion is rotatably installed on the base body and extends into a core channel. When a core passes through the channel, it pushes the detection portion to rotate, triggering the travel switch. An elastic member is provided to reset the connecting rod assembly after the core passes through the channel. The core switch mechanism also includes a first housing connected to the base body, a connecting rod and a pull rod, and a connector for guiding the pull rod.

Additionally, the core detection device includes a spacer insertion mechanism fixed on the base body. This mechanism consists of a slider, a cylinder body, and a rotating arm. The cylinder body is connected to the slider, which can push a spacer into the core channel. The base body is composed of a main body and a partition plate, with a sliding cavity for the slider to move. The slider has an M-shaped cross-section and guide grooves corresponding to guide ribs on the main body. The spacer insertion mechanism also includes a second housing, a bracket, and a second guide post for hinged connections.

The core detection device further comprises a core pushing rod, a displacement detector, and a controller. The controller is connected to the displacement detector and the travel switch. The displacement detector, located on the core pushing rod, provides displacement data to the controller, which calculates the core length during the operation of the travel switch.

Overall, this patent describes a core detection device for a coring instrument that includes a core switch mechanism and a spacer insertion mechanism. The device allows for the detection and measurement of core length during coring 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.