Coring Tool and Method
First Claim
1. A coring tool for use in a borehole formed in a subterranean formation, comprising:
- a tool housing adapted for suspension within the borehole at a selected depth;
a coring aperture formed in the tool housing;
a core receptacle disposed in the tool housing;
a bit housing disposed within the tool housing;
a coring bit mounted within a coring bit assembly, the coring bit assembly being movably disposed in the bit housing;
a bit motor operably coupled to the coring bit and adapted to rotate the coring bit;
a series of pivotably connected extension link arms having a first end pivotably coupled to the bit housing and a second end pivotably coupled to the coring bit assembly, wherein the series of extension link arms comprises a scissor jack; and
a piston operably coupled to the series of extension link arms and adapted to actuate the coring bit between the retracted and extended positions.
1 Assignment
0 Petitions
Accused Products
Abstract
A coring tool for use in a borehole formed in a subterranean formation includes a tool housing with a coring aperture and a core receptacle. A coring bit is mounted within the tool housing and movable between retracted and extended positions by a series of pivotably connected extension link arms. Another set of link arms rotates the coring bit between coring and eject positions. The coring tool may also include a multi-column core storage magazine with shifters to move cores or core holders between columns. The coring tool may be used to measure core lengths during operation and facilitates retrieval of cores having larger lengths and diameters than conventional sidewall coring tools.
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Citations
33 Claims
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1. A coring tool for use in a borehole formed in a subterranean formation, comprising:
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a tool housing adapted for suspension within the borehole at a selected depth; a coring aperture formed in the tool housing; a core receptacle disposed in the tool housing; a bit housing disposed within the tool housing; a coring bit mounted within a coring bit assembly, the coring bit assembly being movably disposed in the bit housing; a bit motor operably coupled to the coring bit and adapted to rotate the coring bit; a series of pivotably connected extension link arms having a first end pivotably coupled to the bit housing and a second end pivotably coupled to the coring bit assembly, wherein the series of extension link arms comprises a scissor jack; and a piston operably coupled to the series of extension link arms and adapted to actuate the coring bit between the retracted and extended positions. - View Dependent Claims (3, 4, 5, 6, 7, 9, 10, 26, 27)
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2. (canceled)
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8. (canceled)
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11. -25. (canceled)
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28. A coring tool, comprising:
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a tool housing configured for suspension within a borehole formed in a subterranean formation, wherein the tool housing comprises a coring aperture, a core receptacle and a bit housing; a coring bit assembly comprising a coring bit and movably disposed in the bit housing; a bit motor configured to rotate the coring bit; a series of pivotably connected extension link arms having a first end pivotably coupled to the bit housing and a second end pivotably coupled to the coring bit assembly, wherein the series of extension link arms comprises a scissor jack; and a piston configured to move the coring bit between retracted and extended positions. - View Dependent Claims (29, 30, 31, 32, 33)
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Specification