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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0096442 (2011-04-28) |
등록번호 | US-8631876 (2014-01-21) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 24 인용 특허 : 363 |
A method of making a composite downhole article is disclosed. The method include forming at least one corrodible core member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate; and disposing at least one outer member on the core member, the outer member comp
A method of making a composite downhole article is disclosed. The method include forming at least one corrodible core member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate; and disposing at least one outer member on the core member, the outer member comprising a second material that is corrodible in the wellbore fluid at a second corrosion rate, wherein the corrodible core member has a composition gradient or a density gradient, or a combination thereof, and wherein the first corrosion rate is substantially greater than the second corrosion rate. A method of using a composite downhole article is also disclosed. The method includes forming a composite downhole article as described above; using the article to perform a first wellbore operation; exposing the article to the wellbore fluid; and selectively corroding the second corrodible member.
1. A method of making a composite downhole article, comprising: forming at least one corrodible core member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate, wherein the corrodible core member comprises an unsintered powder compact or a sintered powder com
1. A method of making a composite downhole article, comprising: forming at least one corrodible core member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate, wherein the corrodible core member comprises an unsintered powder compact or a sintered powder compact; anddisposing at least one outer member on the core member the outer member comprising a second material that is corrodible in the wellbore fluid at a second corrosion rate, wherein the corrodible core member has a composition gradient or a density gradient, or a combination thereof, and wherein the first corrosion rate is substantially greater than the second corrosion rate. 2. The method of claim 1, wherein forming the unsintered powder compact comprises compacting a powder comprising a plurality of metallic powder particles, each powder particle comprising: a particle core, the particle core comprises a core material comprising Mg, Al, Zn, Fe or Mn, or alloys thereof, or a combination thereof, and a metallic coating layer disposed on the particle core, wherein compacting causes the metallic coating layers of adjacent particles to form mechanical bonds to one another sufficient to form the powder compact. 3. The method of claim 1, wherein forming the sintered powder compact comprises forming a substantially-continuous, cellular nanomatrix comprising a nanomatrix material, a plurality of dispersed particles comprising a particle core material that comprises Mg, Al, Zn, Fe or Mn, or alloys thereof, or a combination thereof, dispersed in the cellular nanomatrix, and a bond layer extending throughout the cellular nanomatrix between the dispersed particles. 4. The method of claim 1, wherein forming the corrodible core member comprises establishing the composition gradient or the density gradient, or a combination thereof, of the first material from an outer portion proximate the outer member toward an inner portion away from the outer member. 5. The method of claim 4, wherein establishing the composition gradient or the density gradient, or a combination thereof, of the first material from an outer portion proximate the outer member toward an inner portion away from the outer member comprises varying the composition gradient or the density gradient, or a combination thereof, continuously from the inner portion to the outer portion. 6. The method of claim 4, wherein establishing the composition gradient or the density gradient, or a combination thereof, of the first material from an outer portion proximate the outer member toward an inner portion away from the outer member comprises varying the composition gradient or the density gradient, or a combination thereof, in discrete steps from the inner portion to the outer portion. 7. The method of claim 4, further comprising establishing a composition gradient or a density gradient, or a combination thereof, of the second material in the corrodible core member from the outer portion proximate the outer member toward the inner portion. 8. The method of claim 1, wherein disposing the outer member on the core member comprising depositing a layer of the second material on the core member. 9. The method of claim 1, wherein disposing the outer member on the core member further comprises forming an access point on the second member, the access point configured to provide access of a wellbore fluid to the core member in response to a change in a wellbore condition. 10. The method of claim 1, wherein the composite downhole article comprises a diverter ball, ball seat, plug, plug seat, disk, dart, sleeve or tubular section. 11. The method of claim 1, further comprising reconfiguring the composite downhole article from one shape to another shape or one size to another size by corroding the corrodible core member. 12. The method of claim 11, wherein corroding comprises exposing the corrodible core member to the wellbore fluid. 13. A method of making a composite downhole article, comprising: forming at least one corrodible core member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate; anddisposing at least one outer member on the core member the outer member comprising a second material that is corrodible in the wellbore fluid at a second corrosion rate, wherein the corrodible core member has a composition gradient or a density gradient, or a combination thereof, and wherein the first corrosion rate is substantially greater than the second corrosion rate, wherein disposing the outer member on the core member comprises disposing a powder compact of the second material on the core member. 14. A method of making a composite downhole article, comprising: forming at least one corrodible core member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate; anddisposing at least one outer member on the core member, the outer member comprising a second material that is corrodible in the wellbore fluid at a second corrosion rate, wherein the corrodible core member has a composition gradient or a density gradient, or a combination thereof, and wherein the first corrosion rate is substantially greater than the second corrosion rate, wherein disposing the outer member on the core member comprises depositing a layer of the second material on the core member, and wherein depositing the layer of the second material comprises dipping, plating, sputtering, cladding, thermal spraying, or laser fusion, or a combination thereof. 15. A method of making a composite downhole article, comprising: forming at least one core member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate; anddisposing at least one corrodible outer member on the core member and comprising a second material that is corrodible in the wellbore fluid at a second corrosion rate, at least one of the core member and the outer member comprising a sintered powder compact or an unsintered powder compact, wherein the corrodible outer member has a composition gradient or a density gradient, or a combination thereof, and wherein the second corrosion rate is substantially greater than the first corrosion rate. 16. The method of claim 15, wherein forming the corrodible core member comprises establishing the composition gradient or the density gradient, or a combination thereof, of the second material from an inner portion proximate the core member toward an outer portion away from the core member. 17. The method of claim 16, wherein establishing the composition gradient or the density gradient, or a combination thereof, of the second material from an inner portion proximate the core member toward an outer portion away from the core member comprises varying the composition gradient or the density gradient, or a combination thereof, continuously from the inner portion to the outer portion. 18. The method of claim 16, wherein establishing the composition gradient or the density gradient, or a combination thereof, of the second material from an inner portion proximate the core member toward an outer portion away from the core member comprises varying the composition gradient or the density gradient, or a combination thereof, in discrete steps from the inner portion to the outer portion. 19. The method of claim 16, further comprising establishing a composition gradient or a density gradient, or a combination thereof, of the first material in the corrodible outer member from the inner portion proximate the core member toward the outer portion. 20. The method of claim 15, wherein disposing the outer member on the core member comprises disposing a powder compact of the first material on the core member. 21. The method of claim 15, wherein the composite downhole article comprises a diverter ball, ball seat, plug, plug seat, disk, dart, sleeve or tubular section. 22. The method of claim 15 further comprising reconfiguring the composite downhole article from one shape to another shape or one size to another size by corroding the corrodible outer member. 23. The method of claim 22, wherein corroding comprises exposing the corrodible outer member to the wellbore fluid. 24. A method of using a composite downhole article, comprising: forming a composite downhole article that comprises a first member comprising a first material that is corrodible in a wellbore fluid at a first corrosion rate, and a second corrodible member comprising a second material that is corrodible in the wellbore fluid at a second corrosion rate, wherein the second corrodible member has a composition gradient or a density gradient, or a combination thereof, and wherein the second corrosion rate is substantially greater than the first corrosion rate, and wherein at least one of the first member or the second member comprises an unsintered powder compact or a sintered powder compact;using the article to perform a first wellbore operation;exposing the article to the wellbore fluid; andselectively corroding the second corrodible member. 25. The method of claim 24, wherein the article comprises a diverter ball, plug or disk and the wellbore operation comprises closing an orifice during fracturing, completion or production. 26. The method of claim 24, wherein exposing the article to the wellbore fluid comprises exposing the article to water, brine, or an acid, or a combination thereof. 27. The method of claim 24, wherein selectively corroding comprises completely corroding the second corrodible member. 28. The method of claim 24, wherein selectively corroding comprises partially corroding the second corrodible member. 29. The method of claim 28, wherein partially corroding the second corrodible member comprises removing a layer of the second corrodible member. 30. The method of claim 28, wherein partially corroding the second corrodible member comprises removing a removable portion of the member to provide a remaining portion. 31. The method of claim 30, wherein the remaining portion has a shape that is different than a shape of the second corrodible member. 32. The method of claim 24, wherein exposing the article to the wellbore fluid comprises opening an access point in the first member to allow the wellbore fluid to access the second corrodible member. 33. The method of claim 24, wherein the composite downhole article comprises a diverter ball, ball seat, plug, plug seat, disk, dart, sleeve or tubular section. 34. The method of claim 4, further comprising reconfiguring the composite downhole article from one shape to another shape or one size to another size by corroding the second corrodible member.
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