Patents by Inventor Zhian Liu

Zhian Liu 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: 20240117903
    Abstract: An ultrahigh-pressure acid-fracturing isodiametric hose assembly, comprising a hose body and a metal joint. The metal joint comprises an inner tube, a first outer tube the inner tube, and a second outer tube. The first outer tube and the second outer tube each is an independent pressing part. An external groove is provided at an outer wall of the inner tube. An end of the first outer tube comprises an internal ridge which matches the external groove for snapping. The terminal of the inner tube comprises a connecting portion. An outer wall of the inner tube comprises a first protrusion, and an inner wall of the first outer tube comprises a second protrusion engaging with the first protrusion. The hose body is clamped between the first protrusion and the second protrusion that are engaged. An inner wall of the second outer tube comprises multiple micro-protrusions.
    Type: Application
    Filed: July 27, 2023
    Publication date: April 11, 2024
    Applicant: LUOHE LETONE HYDRAULICS TECHNOLOGY CO., LTD.
    Inventors: Hongliang ZHAO, Zhian LIU, Peiyuan WU, Feilong ZHANG, Xingpeng YANG, Lili LU, Yong ZHANG, Yanhui ZHAO, Pengfei ZHANG, Ning LI
  • Patent number: 5390747
    Abstract: A well rig lifting system and a hydraulic energy-storing well rig lifting system, wherein a high pressure energy-storing cylinder and a composite cylinder or cylinder group are used to carry out the lifting and lowering operations. During the lifting operation, a power machine under a substantially constant load continuously pumps oil to the energy-storing cylinder, and communication relationships of the energy-storing cylinder with various chambers of the composite cylinder or cylinder group is selected to provide an appropriate lifting force to lift the pipe string. Therefore, the installed capacity of the power machine can be reduced to 1/3-1/4 of that in a conventional lifting system.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: February 21, 1995
    Assignee: Drilling Technology Research Institute of Shengli Oilfield
    Inventors: Xinyi Gu, Yunan Wang, Wei Pan, Guihua Luan, Dongchang Sun, Zhian Liu, Ruji Bing