Patents Represented by Attorney, Agent or Law Firm Clifford E. Browning
  • Wellhead cleanup tool
    Patent number: 6401813
    Abstract: A down-hole tool 1 has a body of varying cross-sectional diameter to correspond with a stepped profile of a well bore, such as at the well head. The tool is provided with cleaning members, such as bristles, and fluid circulation paths terminating in radial outlets 11 for cleaning otherwise difficult formations or profiles.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: June 11, 2002
    Assignee: SPS-AFOS Group Limited
    Inventors: Mark Carmichael, Paul Howlett