Patents by Inventor Chengsheng ZHENG

Chengsheng ZHENG 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).

  • Patent number: 9938445
    Abstract: The present disclosure discloses a comb polymer or a salt thereof, wherein the structural formula of the comb polymer containing the following constitutional units. When the comb polymer provided in the present disclosure is used in a water-based drilling fluid as a filtration control agent, it can eliminate the defects of conventional filtration control agents which would be subject to ineffectiveness under high temperature and high salinity conditions. The comb polymer has high temperature and salt resistance, and can be produced through simple processes at comparatively low costs. When the comb polymer provided by the present disclosure is used as a filtration control agent, even being added into the drilling fluid at a comparatively low amount, it can still present rather good effects in lowering the amount of filter loss.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: April 10, 2018
    Assignees: Sinopec Oilfield Service Corporation, Drilling Technology Research Institute of Sinopec
    Inventors: Gongrang Li, Qiang Lan, Peng Zhang, Chengsheng Zheng, Yunbo Xu, Xueqin Wu, Zuohui Li, Yanjun Zhou, Hong Zhang
  • Publication number: 20150203736
    Abstract: The present disclosure discloses a comb polymer or a salt thereof, wherein the structural formula of the comb polymer containing the following constitutional units. When the comb polymer provided in the present disclosure is used in a water-based drilling fluid as a filtration control agent, it can eliminate the defects of conventional filtration control agents which would be subject to ineffectiveness under high temperature and high salinity conditions. The comb polymer has high temperature and salt resistance, and can be produced through simple processes at comparatively low costs. When the comb polymer provided by the present disclosure is used as a filtration control agent, even being added into the drilling fluid at a comparatively low amount, it can still present rather good effects in lowering the amount of filter loss.
    Type: Application
    Filed: December 24, 2014
    Publication date: July 23, 2015
    Inventors: Gongrang LI, Qiang LAN, Peng ZHANG, Chengsheng ZHENG, Yunbo XU, Xueqin WU, Zuohui LI, Yanjun ZHOU, Hong Zhang