CNPC has obtained patents for ball catchers and other devices suitable for use in natural gas transmission pipelines to reduce operational risks
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According to news from August 2, 2025, **information from the Intellectual Property Office shows that China National Petroleum Corporation has obtained a patent titled “A ball-catching device and automatic ball-catching system suitable for natural gas transmission pipelines.” The approval notice number is CN223171559U, with the application date being July 2024. The patent abstract indicates that this utility model discloses a ball-catching device and an automatic ball-catching system suitable for natural gas transmission pipelines; the ball-catching device includes a ball-catching cylinder, a ball-catching pushing element, a ball-catching channel, and an auxiliary ball-catching pushing element ； The receiving cylinder has two open ends, which are connected to the upstream pipes and downstream pipes located on either side, respectively ； One end of the ball-receiving pusher penetrates through the ball-receiving cylinder and extends outward; a ball-receiving channel is provided in the ball-receiving pusher, and this channel is capable of holding a pig. In its reset position, the ball-receiving channel is in communication with the ball-receiving cylinder ； The ball-receiving auxiliary pusher is located on one side of the ball-receiving cylinder; one end of this auxiliary pusher can move in and out of the ball-receiving channel, so as to push the cleaning ball out of the channel when the channel is positioned outside the ball-receiving cylinder ； A ball-receiving reciprocating drive mechanism and a ball-receiving auxiliary reciprocating drive mechanism are respectively connected to the ball-receiving pushing member and the ball-receiving auxiliary pushing member. China National Petroleum has obtained patents for ball collectors and other devices suitable for use in natural gas transmission pipelines to reduce operational risks
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