US2011203855A1PendingUtilityA1

Drilling and core removal apparatus and method

31
Individually held — no corporate assignee on recordPriority: Jun 27, 2007Filed: May 3, 2011Published: Aug 25, 2011
Est. expiryJun 27, 2027(~0.9 yrs left)· nominal 20-yr term from priority
Inventors:Thomas Myrick
E21B 25/12
31
PatentIndex Score
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Cited by
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Claims

Abstract

A drilling and core removal apparatus has a quick-change drill bit release mechanism. A drilling and core removal apparatus has a drill bit and a ground tube within the drill bit, wherein the ground tube having a geometric feature that causes cuttings to be ejected from between the drill bit and the ground tube. A drilling and core removal apparatus has a sensor for indicating that a core sample in a collet tube is approaching a stuck condition.

Claims

exact text as granted — not AI-modified
1 . A drilling and core removal apparatus having a quick-change drill bit release mechanism. 
     
     
         2 . A drilling and core removal apparatus having a drill bit and a ground tube within the drill bit, wherein the ground tube having a geometric feature that causes cuttings to be ejected from between the drill bit and the ground tube. 
     
     
         3 . A drilling and core removal apparatus having a sensor for indicating that a core sample in a collet tube is approaching a stuck condition.

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