Patents by Inventor Xiaoxiao Du

Xiaoxiao Du 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).

  • Dynamic simulation method of circulating temperature variation in RMR subsea pump mud-lift drilling system
    Patent number: 11188694
    Abstract: The invention discloses a dynamic simulation method of circulating temperature variation in RMR subsea pump mud-lift drilling system, including steps: obtaining operating parameters, environmental parameters, well structure parameters and thermal parameters of target well; establishing temperature control equation of drill string in seawater section, temperature control equation of drill string in formation section, temperature control equation of annulus in formation section, and temperature control equation of return pipe in seawater section; re-determining initial and boundary conditions; discretizing spatial structure of the whole system with inner node method; discretizing control equations on corresponding nodes; substituting corresponding parameters into discrete expressions to obtain circulating temperature in drill string of seawater section, circulating temperature in drill string of formation section, circulating temperature in annulus of formation section, and circulating temperature in return pip
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: November 30, 2021
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Xin Li, Jie Zhang, Cuinan Li, Peigang Wang, Xuefeng Sun, Xiaoxiao Du, Weilin Chen, Lin Chen
  • Dynamic Simulation Method of Circulating Temperature Variation in RMR Subsea Pump Mud-lift Drilling System
    Publication number: 20210216689
    Abstract: The invention discloses a dynamic simulation method of circulating temperature variation in RMR subsea pump mud-lift drilling system, including steps: obtaining operating parameters, environmental parameters, well structure parameters and thermal parameters of target well; establishing temperature control equation of drill string in seawater section, temperature control equation of drill string in formation section, temperature control equation of annulus in formation section, and temperature control equation of return pipe in seawater section; re-determining initial and boundary conditions; discretizing spatial structure of the whole system with inner node method; discretizing control equations on corresponding nodes; substituting corresponding parameters into discrete expressions to obtain circulating temperature in drill string of seawater section, circulating temperature in drill string of formation section, circulating temperature in annulus of formation section, and circulating temperature in return pip
    Type: Application
    Filed: January 12, 2021
    Publication date: July 15, 2021
    Applicant: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Xin Li, Jie Zhang, Cuinan Li, Peigang Wang, Xuefeng Sun, Xiaoxiao Du, Weilin Chen, Lin Chen