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US 5,487,433 AGranted
Core separator assembly
AssigneeWesters Atlas International Inc.
InventorsBruce W. Mackay, Abbas Arian
Life of this patent
Estimating the term…
Abstract
An assembly for dispensing a core separator ring on the top of a previously-cut core that is ejected from a core-cutting bit in a storage bin. The core separator assembly is integral with the forward end of the core ejector system.
Claims4
A core collector mounted on a coring tool for use in a borehole, comprising in combination:
- a hollow core cutting bit having a borehole sidewall core-cutting position and a core-storage position;
- a core ejector means;
- means for causing said core ejector means sequentially
- 1) to execute an ejecting stroke to eject a core from said core cutting bit into a core storage means when said core cutting bit is disposed in the core-storage position and
- 2) to positively deposit a core separator ring on top of the ejected core prior to executing a withdrawal stroke.
2 more elements
For use with a borehole sidewall coring tool, a core ejector piston for pushing a core sample from a core-cutting bit into a storage bin, comprising:
- a compression sub integral with the leading end of said core ejector piston;
- a mandrel having a forward end, coupled to said compression sub;
- a piston actuator rod, disposed internally of said compression sub and said mandrel, operatively coupled to an actuator ring, said actuator ring being mounted for external axial motion along said mandrel;
- a pair of sprockets each having a first tooth, a second tooth and a spring-loaded cam member, the sprockets being mounted on opposite sides of the forward end of said mandrel, the rotational axis of each said sprocket being transverse to the longitudinal axis of said mandrel;
- a plurality of separator rings slidingly stacked between said actuator ring and the first tooth of each said sprocket, there being at least a lowermost separator ring;
- means for applying hydraulic pressure to said piston actuator rod to cause said actuator ring to press the lowermost separator ring against the first tooth of said sprockets causing said sprockets to rotate until the opposing force of the spring-loaded cams is overcome so that the lowermost separator ring is dispensed while the second of said sprocket teeth trap the separator ring next in line along the mandrel.
3 more elements
Dependencies are inferred from the claim text.