Well cleaning tool with scratching elements

• US 5,419,397 A
• Filed: 06/16/1993
• Issued: 05/30/1995
• Est. Priority Date: 06/16/1993
• Status: Expired due to Term

• Current Assignee: Express Chemical Finance, LLC
• Original Assignee: Well Surge Technologies, LLC
• Inventors: Reynolds, J. Scott, Sloan, Robert L.
• Primary Examiner(s): NOVOSAD, STEPHEN
• Application Number:
  US08/078,542
• Time in Patent Office: 713 Days
• Field of Search: 166/173, 166/174, 166/170, 166/171, 166/176, 166/177, 166/311, 166/312, 15/104.16, 15/104.2
• US Class Current: 166/312
• CPC Class Codes: E21B 17/1042 Elastomer protector or centering means
• CPC Class Codes: E21B 37/02 Scrapers specially adapted therefor

Claims