Patents Assigned to Eastman Teleco Company
  • Method for determining borehole fluid influx
    Patent number: 5222048
    Abstract: Fluid influx in a borehole is determined by examining and monitoring the computed transfer function in the signal channel defined by the annulus between the borehole and a drillstring in the borehole.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: June 22, 1993
    Assignee: Eastman Teleco Company
    Inventors: Donald S. Grosso, Ali H. Abdallah