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US 2025/0075576 A1Published application
Greaseless core barrel head assembly
AssigneeLongyear TM, Inc.
InventorChristopher L. Drenth
Life of this patent
Estimating the term…
Abstract
A core sampling tool having a core barrel and a core barrel head assembly coupled to a proximal end of the core barrel. The core barrel head assembly does not include a grease port or a grease fitting. The core barrel head assembly has a spindle and at least one bearing that rotationally engages the spindle. Each of the bearings is a self-lubricating bearing, such as, for example, a solid oil bearing.
Claims20
A core sampling tool comprising:
- a core barrel having a proximal end;
- and
- a core barrel head assembly coupled to the proximal end of the core barrel,
- wherein the core barrel head assembly does not comprise a grease port or a grease fitting.
1 more element
A core barrel head assembly configured for coupling to a core barrel, the core barrel head assembly comprising:
- an elongate body having a proximal end and a distal end;
- a bearing subassembly configured to engage the proximal end of the elongate body
- a spindle subassembly that is rotationally engaged by the bearing subassembly,
- wherein the spindle subassembly comprises a hollow spindle having an inner diameter of at least ⅝ inch, and wherein the bearing subassembly comprises one or more self-lubricating bearings.
1 more element
A method comprising:
- advancing a core sampling tool within a formation, the core sampling tool comprising a core barrel head assembly coupled to a core barrel;
- and
- receiving core within the core barrel,
- wherein the method does not comprise delivering grease to or within the core barrel head assembly.
1 more element
-37. (canceled)
Dependencies are inferred from the claim text.