IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0593437
(2006-11-06)
|
등록번호 |
US-7784567
(2010-09-20)
|
발명자
/ 주소 |
- Choe, Heeman
- Stevens, John H.
- Overstreet, James L.
- Westhoff, James C.
- Eason, Jimmy W.
|
출원인 / 주소 |
- Baker Hughes Incorporated
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
128 |
초록
▼
Earth-boring rotary drill bits include bit bodies comprising a composite material including a plurality of hard phase regions or particles dispersed throughout a titanium or titanium-based alloy matrix material. The bits further include a cutting structure disposed on a face of the bit body. In some
Earth-boring rotary drill bits include bit bodies comprising a composite material including a plurality of hard phase regions or particles dispersed throughout a titanium or titanium-based alloy matrix material. The bits further include a cutting structure disposed on a face of the bit body. In some embodiments, the bit bodies may include a plurality of regions having differing material compositions. For example, the bit bodies may include a first region comprising a plurality of hard phase regions or particles dispersed throughout a titanium or titanium-based alloy matrix material, and a second region comprising a titanium or a titanium-based alloy material. Methods for forming such drill bits include at least partially sintering a plurality of hard particles and a plurality of particles comprising titanium or a titanium-based alloy material to form a bit body comprising a particle-matrix composite material. A shank may be attached directly to the bit body.
대표청구항
▼
What is claimed is: 1. A rotary drill bit for drilling a subterranean formation, the drill bit comprising: a bit body substantially comprised of a particle-matrix composite material comprising a plurality of hard phase regions dispersed throughout an α+β titanium alloy or a β tita
What is claimed is: 1. A rotary drill bit for drilling a subterranean formation, the drill bit comprising: a bit body substantially comprised of a particle-matrix composite material comprising a plurality of hard phase regions dispersed throughout an α+β titanium alloy or a β titanium alloy matrix material, the hard phase regions comprising a material selected from the group consisting of titanium carbide, titanium diboride, tungsten, and titanium silicide, the hard phase regions comprising between about 20% and about 60% by volume of the particle-matrix composite material, and the titanium alloy matrix material comprising between about 80% and about 40% by volume of the particle-matrix composite material; and at least one cutting structure disposed on a face of the bit body. 2. The rotary drill bit of claim 1, further comprising a shank directly attached to a region of the bit body comprising the particle-matrix composite material. 3. The rotary drill bit of claim 2, further comprising at least one retaining member extending through at least a portion of an outer wall of the shank and abutting against at least one surface of the bit body, mechanical interference between the shank, the at least one retaining member, and the bit body at least partially securing the shank to the bit body. 4. The rotary drill bit of claim 1, wherein the titanium alloy matrix material of the composite material comprises at least about 87.5 weight percent titanium, approximately 6.0 weight percent aluminum, and approximately 4.0 weight percent vanadium. 5. The rotary drill bit of claim 4, wherein the titanium alloy matrix material further comprises at least trace amounts of at least one of tin, copper, iron, and carbon. 6. The rotary drill bit of claim 1, wherein the bit body comprises: a first region having a first material composition, a surface of the first region being configured to carry a plurality of cutting elements for engaging an earth formation; and a second region having a second material composition differing from the first material composition. 7. The rotary drill bit of claim 6, wherein the first material composition exhibits a first hardness and the second material composition exhibits a second hardness, the second hardness being less than the first hardness. 8. The rotary drill bit of claim 6, wherein the first region comprises at least one of an α+β titanium alloy and a β titanium alloy having a hardness of greater than about 350 on the Vickers hardness scale, and wherein the second region comprises at least one of an α+β titanium alloy and a β titanium alloy having a fracture toughness of greater than about 100 MPa-m1/2. 9. The rotary drill bit of claim 6, wherein the second region comprises a β titanium alloy. 10. The rotary drill bit of claim 9, wherein the first region comprises one of a β titanium alloy and an α+β titanium alloy. 11. The rotary drill bit of claim 6, wherein the second region comprises an α+β titanium alloy. 12. The rotary drill bit of claim 11, wherein the first region comprises one of a β titanium alloy and an α+β titanium alloy. 13. The rotary drill bit of claim 1, further comprising a layer of titanium nitride disposed on at least a portion of a surface of the rotary drill bit configured to engage a subterranean formation during drilling. 14. The rotary drill bit of claim 1, wherein the particle-matrix composite material exhibits a linear coefficient of thermal expansion at room temperature of between about 7.5 μm/m° C. and about 9.5 μm/m° C. 15. A rotary drill bit for drilling a subterranean formation, the drill bit comprising: a bit body comprising: a first region having a first material composition comprising a particle-matrix composite material comprising a plurality of hard phase regions dispersed throughout a an α+β titanium alloy or a β titanium alloy matrix material, the hard phase regions comprising a material selected from the group consisting of titanium carbide, titanium diboride, tungsten, and titanium silicide, the hard phase regions comprising between 20% and about 60% by volume of the particle-matrix composite material, and the titanium alloy matrix material comprising between about 80% and about 40% by volume of the particle-matrix composite material, a surface of the first region being configured to carry a plurality of cutting elements for engaging an earth formation; and a second region having a second material composition differing from the first composition and comprising a titanium or a titanium-based alloy material; and a plurality of cutting structures disposed on the surface of the first region of the bit body. 16. The rotary drill bit of claim 15, further comprising a shank directly attached to the second region of the bit body. 17. The rotary drill bit of claim 15, wherein the titanium alloy matrix material of the particle-matrix composite material of the first material composition has an average hardness of greater than about 350 on the Vickers hardness scale, and wherein the second region comprises at least one of an α+β titanium alloy and a β titanium alloy having a fracture toughness of greater than about 100MPa-m1/2. 18. The rotary drill bit of claim 15, further comprising a layer of titanium nitride disposed on at least a portion of a surface of the rotary drill bit configured to engage a subterranean formation during drilling.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.