최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
|
출원번호 | US-0475344 (2009-05-29) |
등록번호 | US-8281882 (2012-10-09) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 1 인용 특허 : 379 |
A drill bit has an axis of rotation and a working face with a plurality of blades extending outwardly from a bit body. The blades form, in part, an inverted conical region, and a plurality of cutters with a cutting surface is arrayed along the blades. A jack element is coaxial with the axis of rotat
A drill bit has an axis of rotation and a working face with a plurality of blades extending outwardly from a bit body. The blades form, in part, an inverted conical region, and a plurality of cutters with a cutting surface is arrayed along the blades. A jack element is coaxial with the axis of rotation and extends within the inverted conical region within a range defined by the cutting surface of at least one cutter.
1. A drill bit, comprising: a shank;a bit body attached to said shank, said bit body having an axis of rotation, said bit body including: a working face having a plurality of blades extending outwardly therefrom, said plurality of blades forming an inverted conical region;a plurality of cutters posi
1. A drill bit, comprising: a shank;a bit body attached to said shank, said bit body having an axis of rotation, said bit body including: a working face having a plurality of blades extending outwardly therefrom, said plurality of blades forming an inverted conical region;a plurality of cutters positioned on said plurality of blades, said plurality of cutters including: a first cutter having a first point most distant from said working face relative to said plurality of cutters;a second cutter proximate said axis of rotation, said second cutter having a another point nearest said working face relative to said plurality of cutters;a pocket formed within said working face;a channel connecting said pocket to a bore of said drill bit; and,a jack element disposed within said pocket, said jack element having a distal end within said inverted conical region, said distal end extending away from said working face a distance between said first point and said second point, said jack element limiting a depth to which at least one of said plurality of cutters engages a formation. 2. The drill bit of claim 1, wherein said distal end includes a surface comprising a material with a hardness of at least 63 HRc. 3. The drill bit of claim 1, wherein said working face has a cross-sectional area that is from about 4 times to about 12 times a cross-sectional area of said jack element. 4. The drill bit of claim 1, wherein said distal end of said jack element extends away from said working face a distance from about 0.100 inches to about 3 inches. 5. The drill bit of claim 1, wherein said jack element is tapered. 6. The drill bit of claim 1, wherein said jack element is press-fit into a sleeve, said sleeve being brazed into said pocket. 7. A drill bit, comprising: a shank;a bit body attached to said shank, said bit body having an axis of rotation, said bit body including: a working face having a plurality of blades extending outwardly therefrom, said blades forming an inverted conical region;a plurality of cutters positioned on said plurality of blades, said plurality of cutters including a cutter proximate said axis of rotation, said cutter having a point nearest said working face relative to said plurality of cutters and a diameter extending therefrom to another point;a pocket formed within said working face;a channel connecting said pocket to a bore of said drill bit; and,a jack element disposed within said pocket, said jack element having a distal end within said inverted conical region, said distal end extending away from said working face a distance that falls between said point and said another point. 8. The drill bit of claim 7, wherein said jack element is press-fit into a sleeve, said sleeve being brazed into said pocket. 9. A drill bit, comprising: a shank;a bit body attached to said shank, said bit body having an axis of rotation, said bit body including: a working face having a plurality of blades extending outwardly therefrom, said blades forming an inverted conical region;a plurality of cutters positioned on said plurality of blades, said plurality of cutters including at least one cutter configured to a cut a region of a formation to a depth;a pocket formed within said working face;a channel connecting said pocket to a bore of said drill bit; and,a jack element disposed within said pocket, said jack element having a distal end within said inverted conical region, said distal end extending away from said working face to a distance within said region. 10. The drill bit of claim 9, wherein said at least one cutter is proximate said axis of rotation, said at least one cutter having a point nearest said working face relative to said plurality of cutters. 11. The drill bit of claim 9, wherein said jack element is press-fit into a sleeve, said sleeve being brazed into said pocket. 12. A drill bit, comprising: a shank;a bit body attached to said shank, said bit body having an axis of rotation, said bit body including: a working face having a plurality of blades extending outwardly therefrom, said blades forming an inverted conical region;a plurality of cutters positioned on said plurality of blades, said plurality of cutters including a cutter proximate said axis of rotation, said cutter having a point nearest said working face relative to said plurality of cutters and a diameter extending therefrom to another point;a pocket formed within said working face;a sleeve brazed into said pocket; and,a jack element press-fit into said sleeve, said jack element having a distal end within said inverted conical region, said distal end extending away from said working face a distance that falls between said point and said another point.
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