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Core drilling tools with external fluid pathways

A fluid and core tube technology, which can be used in the extraction of undisturbed core devices, earthwork drilling, wellbore/well components, etc., and can solve problems such as time-consuming

Inactive Publication Date: 2012-11-07
LONGYEAR TM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even when using a wireline drilling system, running the core barrel assembly into and out of the drill string is still time consuming

Method used

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  • Core drilling tools with external fluid pathways
  • Core drilling tools with external fluid pathways
  • Core drilling tools with external fluid pathways

Examples

Experimental program
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Embodiment Construction

[0038] Embodiments of the present invention relate to drilling tools, systems, and methods for effectively and efficiently running a core barrel assembly into and out of a drill string. For example, one or more embodiments of the invention include a core barrel assembly having one or more outer fluid passages. In particular, one or more components of the core barrel assembly may include axial fluid grooves that allow increased fluid flow between the core barrel assembly and the inner surface of the drill string. Accordingly, one or more embodiments of the present invention may increase productivity and efficiency in core drilling operations by reducing the time required for a core barrel assembly to move through the drill string.

[0039] As explained in more detail below, the outer fluid passages may allow increased fluid flow around the core barrel assembly. Increased fluid flow may provide increased cooling of the drill bit. Additionally, the increased fluid flow allows f...

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PUM

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Abstract

Implementations of the present invention include a core barrel assembly including external fluid pathways extending generally axially long the outer surface of the core barrel assembly. The one or more external fluid pathways can allow for increased fluid flow around a latch mechanism. The increased fluid flow around the latch mechanism can allow the core barrel assembly to travel faster within the drill string, can allow drilling fluid to pass by the latch mechanism when engaged. Implementations of the present invention also include drilling systems including external fluid pathways, and methods of retrieving a core sample using such drilling systems.

Description

technical field [0001] Practices of the present invention generally relate to drilling apparatus and methods that may be used to drill geological and / or man-made formations. In particular, the practice of the present invention relates to core barrel assemblies. Background technique [0002] Core drilling (or core sampling) involves obtaining core samples of subsurface formations at various depths for various reasons. For example, core samples retrieved may indicate what substances, such as oil, precious metals, and other desired substances, are or may be present in a particular rock formation, and at what depths. In some cases, core sampling can be used to give a geological timeline of species and events. Therefore, core sampling can be used to determine the need for further mining in a particular area. [0003] A wireline drilling system is a common type of drilling system used to retrieve rock core samples. During wireline drilling, a core bit is attached to the leadin...

Claims

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Application Information

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IPC IPC(8): E21B25/02
CPCE21B25/02E21B49/02
Inventor 克里斯托弗·L·德伦斯
Owner LONGYEAR TM