Apparatus for use in enlarging a borehole

Details Apparatus for use in enlarging a borehole Apparatus for use in enlarging a borehole

2005-08-16

2005-08-16

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Noncutting portion forwardly of cutting portion

Reexamination Certificate

active

06929078

ABSTRACT:
A device for enlarging a bore includes an elongate body having a forward end, a rear end and an axis of rotation. The body of the device is adapted to be moved through the bore while being rotated about its axis. The device also includes a cutting blade which is attached to the body at or near its forward end, and a plurality of mixing wings. Each of the mixing wings has a unique shape, and each is attached to the body behind the cutting blade so that the axis of rotation of the body is within the plane spanned by the mixing wing.

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