Patents by Inventor David Molley

David Molley 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).

  • Fine control of casing pressure
    Patent number: 11286734
    Abstract: Back pressure control devices used to control fluid pressure in a wellbore require various utilities for operation, such as an air supply. Apparatus disclosed herein provide for the continued operation of one or more back pressure control devices when supply of utilities for operation of the back pressure control devices are intentionally or unintentionally interrupted.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: March 29, 2022
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Roger Suter, David Molley
  • Systems and methods for managed pressured drilling
    Patent number: 9932787
    Abstract: Stable back pressure control devices are used to control fluid pressure in a wellbore to provide constant downhole pressure. Back pressure may be estimated from a correlation between the speed of a mud pump and the pressure exerted from the pump. Drilling plans disclosed herein provide for the continued operation of one or more back pressure control devices for providing constant bottomhole pressure when casing connections are being made.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: April 3, 2018
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Roger Suter, David Molley
  • FINE CONTROL OF CASING PRESSURE
    Publication number: 20140352951
    Abstract: Back pressure control devices used to control fluid pressure in a wellbore require various utilities for operation, such as an air supply. Apparatus disclosed herein provide for the continued operation of one or more back pressure control devices when supply of utilities for operation of the back pressure control devices are intentionally or unintentionally interrupted.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 4, 2014
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Roger Suter, David Molley
  • CONNECTION MAKER
    Publication number: 20140345941
    Abstract: Stable back pressure control devices are used to control fluid pressure in a wellbore to provide constant downhole pressure. Back pressure may be estimated from a correlation between the speed of a mud pump and the pressure exerted from the pump. Drilling plans disclosed herein provide for the continued operation of one or more back pressure control devices for providing constant bottomhole pressure when casing connections are being made.
    Type: Application
    Filed: December 14, 2012
    Publication date: November 27, 2014
    Inventors: Roger Sutter, David Molley