Core Barrel Stabilizer

Abstract

A core barrel stabilizer that offers a simple solution in creating an initial drilling kerf in conjunction with a hollow core barrel for drilling large diameter holes into the earth for a plethora of construction needs. The core barrel stabilizer includes a centering rod for keeping the core barrel stabilizer and hollow core barrel centered during drilling the initial perimeter kerf, an eyelet hook for easily maneuvering the core barrel stabilizer between drill holes and transportation, and an inner barrel used to rest the inner wall of the hollow core barrel against during drilling to ensure the drilling kerf can be started.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]U.S. Pat. No. 4,671,367STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable to this application.BACKGROUND OF THE INVENTION1. Field of the Invention[0003]The present invention relates generally to an improved technique for drilling relatively large-diameter holes using a core barrel and a newly designed core barrel stabilizer for construction piling for buildings, bridges, and the like.2. Description of the Related Art[0004]In the drilling industry, it is desired to drill relatively large diameter holes in the bedrock of the earth ranging from 36 inches to 48 inches and up. These holes can be utilized for a multitude of construction desires to accomplish foundation work, access-holes, etc. Typically, a complete hole is drilled using a large cluster drill or gang drill driven by a large crane or excavator combined with a rotary head or Kelly-bar drive. Another means is through the same type of setup, but with...

AI Technical Summary

Benefits of technology

The present invention provides a core barrel stabilizer that can be easily removed from the drilling surface and used on different cranes and excavators without the need to attach it directly to the Kelly bar drive. This device is a simple drop-in solution that avoids lateral movement of the core barrel during the initial kerf creation. Additionally, the core barrel stabilizer does not require the crane or excavator to have a pre-design pilot tube system built into it, reducing costs and allowing for drilling in more spatially restrictive construction sites.

Problems solved by technology

As stated above, current methods use large cranes and or excavators to hold and secure the core barrel in place as the core barrel tries to create an initial kerf, but for smaller residential or spatially restrictive construction areas, this type of equipment is not practical due to sheer size and equipment cost.

Even with the larger equipment used for drilling, creating the initial kerf in uneven or unconsolidated ground can be extremely difficult as the rotation of the core barrel and the vibration of the core barrel hammers will cause a “walking effect” on the drilling surface.

This “walking effect” results in the core barrel to no longer be concentric with the initial starting point making it extremely difficult to create the initial kerf in the precise location for the core barrel.

This method requires a large crane and or excavator paired with a Kelly bar drive that can be extremely costly and difficult to setup in smaller construction areas.

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