Earth boring device and method of use

Abstract

A borehole tool for drilling in a formation is disclosed. The tool is of the type that incorporates a sphere for deploying cutting elements for hydraulically expanding the same for borehole reaming or enlargement during drilling. The tool conveniently includes a reset function where the cutting elements can be reset to a retracted position within the cutter housing. Advantageously the reset of the cutter elements is achievable by simply removing a cutting bit at the end of drill string and inserting the reset member in the form of a elongate rod through the end of the drill string to urge the sphere or ball back to the top of the drill string for retrieval and resetting the movable member which allows for fluid flow redirection within the cutter housing. The reset function can be achieved on site thus avoiding significant expenses and downtime typically associated with systems that cannot be reset onsite.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an earth boring device and more particularly, the present invention relates to a method and apparatus for stabilizing a drill string during earth boring and expansion reaming.BACKGROUND OF THE INVENTION[0002]Drilling tools of all varieties are known in the art. One of the problems that has been pervasive in the solutions presented by the prior art relates to dependability of the tool and also expediency when resetting the reamer function once it has been deployed. As has been identified in the prior art, resetting the ball used to redirect the drilling fluid can be arduous and requires removal of the tool from within the formation partial disassembly and subsequent reassembly. All of these operations are time intensive and are therefore very costly in a drilling operation. The present invention seeks to mitigate the limitations with existing arrangements to provide a more effective drilling tool which may be easily and qui...

AI Technical Summary

Benefits of technology

The present invention provides an expandable reaming apparatus for use in drilling oil wells. The apparatus has a tubular body with a drilling fluid flow path and movable cutting members for reaming and expanding the diameter of a borehole. The apparatus is placed inside the formation and drilling fluid is introduced. The apparatus has a redirection member that senses drilling fluid pressure and moves to redirect the fluid flow. This allows the apparatus to be moved to the desired position for reaming. The invention provides an improved method for reaming oil wells that allows for easier and more efficient drilling.

Problems solved by technology

One of the problems that has been pervasive in the solutions presented by the prior art relates to dependability of the tool and also expediency when resetting the reamer function once it has been deployed.

As has been identified in the prior art, resetting the ball used to redirect the drilling fluid can be arduous and requires removal of the tool from within the formation partial disassembly and subsequent reassembly.

All of these operations are time intensive and are therefore very costly in a drilling operation.

Despite the panacea of developments in this area of technology, there is a notable absence of expandable reamer with a reset function that can be expeditiously effected in the field.

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