Fluid responsive core barrel system
Patent
·
OSTI ID:6711827
A core barrel system includes a single core sampling unit that may be used in up holes or down holes. The unit is pumped through a hollow drill string until a core container in the unit reaches the core receiving position proximate the coring bit, whereupon the unit produces a signal indicating that the unit is in the proper position. A pair of flexible and resilient latch fingers automatically moves into latch seats in the drill string and drilling fluid is allowed to bypass the core sampling unit to the bit for the drilling of a core. The core container in the core sampling unit receives the core. When the core container is filled, a signal is produced that indicates the desired length of core sample has been obtained. The core sampling unit with the length of core sample in the core container automatically unlatches and the length of core is broken from the formation by pulling the drill string a short distance out of the hole. (16 claims)
- Assignee:
- Boyles Industries Inc.
- Patent Number(s):
- US 3777826
- OSTI ID:
- 6711827
- Country of Publication:
- United States
- Language:
- English
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