Apparatus for collecting drilling samples

• US 2,728,553 A
• Filed: 09/27/1954
• Issued: 12/27/1955
• Est. Priority Date: 09/27/1954
• Status: Expired due to Term

• Current Assignee: John Edwards
• Original Assignee: John Edwards
• Inventors: Edwards, John
• Application Number:
  US03/458,611
• Time in Patent Office: 456 Days
• US Class Current: 175/308
• CPC Class Codes: E21B 27/00 Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
• CPC Class Codes: E21B 49/005 Testing the nature of borehole walls or the formation by using drilling mud or cutting data
• CPC Class Codes: E21B 49/02 by mechanically taking samples of the soil

Claims