Patents by Inventor Lielai Wu

Lielai Wu 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).

  • Apparatus for decoking a delayed coker using a flexible pipe
    Patent number: 5076893
    Abstract: The present invention relates to decoking of a residual oil delayed coke reactor. When decoking, the roller of the flexible pipe winch is rotated to cause the flexible pipe to vertically ascend or descend in the coker wherein the high pressure water rotates the turbine blades of the turbine-reductor which brings the drilling and cutting combination unit into rotation so as to drill a through hole in the coke accumulation and then conduct the decoking operation. The drilling and cutting combination unit is equipped with a pressure control unit so that switchover of the drilling and cutting operations can be automatically performed. The present invention eliminates the use of a derrick, resulting in significant savings in time, quantity of steel, capital investment, and equipment required to facilitate the decoking process and enhance decoking efficiency.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: December 31, 1991
    Assignees: LuoYang Petrochemical Engineering Corporation SINOPEC (LPEC), Institut Francais du Petrole
    Inventors: Wuwei Tong, Deyu Sun, Qingyuan Zhang, Lielai Wu, Shicheng Zhou, Shande Yu, Daoji Du, Shili Yang
  • Process for decoking a delayed coker
    Patent number: 4959126
    Abstract: The present invention relates to decoking of a residual oil delayed coke reactor. When decoking, the roller of the flexible pipe winch is rotated to cause the flexible pipe to vertically ascend or descend in the coker wherein the high pressure water rotates the turbine blades of the turbine-reductor which brings the drilling and cutting combination unit into rotation so as to drill a through hole in the coke accumulation and then conduct the decoking operation. The drilling and cutting combination unit is equipped with a pressure control unit so that switchover of the drilling and cutting operations can be automatically performed. The present invention eliminates the use of a derrick, resulting in significant savings in time, quantity of steel, capital investment, and equipment required to facilitate the decoking process and enhance decoking efficiency.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: September 25, 1990
    Assignees: LuoYang Petrochemical Engineering Corporation SINOPEC (LPEC), Institut Francais du Petrole
    Inventors: Wuwei Tong, Deyu Sun, Qingyuan Zhang, Lielai Wu, Shicheng Zhou, Shande Yu, Daoji Du, Shili Yang