Patents by Inventor Lucian K. Johnston

Lucian K. Johnston 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: 9719341
    Abstract: To control well drilling, information relating to a trajectory of a well is received, and fluid flow in the well is simulated according to the received information. Simulating the fluid production comprises simulating production flow assurance that seeks to reduce occurrence of mixtures of different types of fluids that reduce production of a target fluid. In response to results of the simulating, a further trajectory for further drilling of the well is identified.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: August 1, 2017
    Assignee: Schlumberger Technology Corporation
    Inventors: Lucian K. Johnston, Shahid Azizul Haq
  • Publication number: 20100282508
    Abstract: To control well drilling, information relating to a trajectory of a well is received, and fluid flow in the well is simulated according to the received information. Simulating the fluid production comprises simulating production flow assurance that seeks to reduce occurrence of mixtures of different types of fluids that reduce production of a target fluid. In response to results of the simulating, a further trajectory for further drilling of the well is identified.
    Type: Application
    Filed: April 30, 2010
    Publication date: November 11, 2010
    Applicant: Schlumberger Technology Center
    Inventors: Lucian K. Johnston, Shahid Azizul Haq
  • Patent number: 6675895
    Abstract: The combination of the cement contamination laboratory measurements and the field log measurement allows to perform the evaluation of cement placement and quality related to the designed percentage cement displacement coverage and set-up times in the casing annulus. Since the logging time after the cement job is completed is known, a comparison between the acoustic impedance or compressive strength measured using the USI log and the acoustic impedance or the compressive strength measured in the laboratory, a level of mud contamination can be derived at every point across the wellbore. From the laboratory correlations, cement strength prediction with time can be established. This new product will give the operator an accurate tool to recommend performing remedial cementing with a higher success rate.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: January 13, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Gamal Shehab, John F. Vaeth, Lucian K. Johnston