China National Offshore Oil has developed an integrated logging instrument for coring and sampling, featuring a downhole main body connected to a ground system via a long cable. The system includes a coring mechanism, power mechanism with a motor and pump, and an energy storage mechanism for temporary power supply, ensuring operational safety. 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 February 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Integrated logging instrument for coring and sampling
A recently granted patent (Publication Number: US11905829B2) discloses an integrated logging instrument designed for coring and sampling operations in the field of drilling. The instrument consists of a downhole main body connected to a ground system via a long cable. The main body features a coring and sampling mechanism, a power mechanism, and an energy storage mechanism. The power mechanism, located at the upper end of the coring and sampling mechanism, includes a motor, a piston structure, and a pump body to provide suction and hydraulic power for various components. The energy storage mechanism, situated at the lower end, stores pressure energy and acts as a temporary power source for ensuring the safety of the downhole main body during operations.
Furthermore, the integrated logging instrument includes additional components such as a balance compensator, core storage barrel, and a sampling barrel mechanism. These elements are arranged in parallel along the length of a wellbore to optimize functionality. The instrument's design allows for multiple coring assemblies and pushing and setting assemblies to be alternately arranged, enhancing efficiency during coring and sampling processes. The piston structure, with separate chambers and pistons, works in conjunction with a plunger pump to provide high-pressure liquid to the coring and sampling mechanism through a hydraulic pipe. Additionally, a fluid identification mechanism is incorporated between the power mechanism and the sampling barrel mechanism for improved performance and control.
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