Patents by Inventor Zhengzhao LIANG

Zhengzhao LIANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200165887
    Abstract: A graded pressure drop type multi stage water injection device and method based on fracture observation. The device includes a test probe, a propulsion system and a control system. The test probe includes a plugging device, a pressure conversion assembly and a connected pipe. The rubber bag is wrapped around the outer end of the water leakage pipe, is fixed to both ends of the joints through a fastening iron ring and forms a blocked cavity with the water leakage pipe. The device integrates the plugging and detection system, and uses the same external water source to operate the plugging process and detection process under their respective pressures, thereby making pressure conversion more stable, solving the problem of winding the drill pipe and the hose in the propulsion process, realizing multi stage measurement in each propulsion and improving measurement efficiency.
    Type: Application
    Filed: April 20, 2018
    Publication date: May 28, 2020
    Inventors: Zhengzhao LIANG, Wencheng SONG, Chunan TANG, Shibin TANG, Yingchun LI, Ke MA, Gen LI, Tianhui MA, Hong LI
  • Publication number: 20200165915
    Abstract: Within the technical field of detecting a mining-induced failure range of rock mass, and particularly relating to a graded-pressure drop type detection system and detection method of borehole cracks, a detection system is provided including a test probe, a drilling rig, a drill pipe and a control operation platform. The test probe includes a plugging device and a pressure conversion assembly. The pressure conversion assembly is connected with the plugging device at the rear end through a connected pipe and includes a first stage pressure converting device and a second stage pressure converting device. The detection system simplifies the existing operating system, avoids the problem of drill pipes winding in drill hole, realizes plugging process and detection process with the same external water source, and ensures that the plugging process and the observation process operate under respective predetermined pressures.
    Type: Application
    Filed: April 20, 2018
    Publication date: May 28, 2020
    Inventors: Zhengzhao LIANG, Wencheng SONG, Chunbo ZHAO, Chunan TANG, Shibin TANG, Hong LI, Tianhui MA, Gen LI, Ke MA, Yingchun LI