IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0894457
(2001-06-28)
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발명자
/ 주소 |
- DeLange, Richard W.
- Hashem, Ghazi J.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
11 인용 특허 :
21 |
초록
▼
A corrosion-resistant threaded connection including a first tubular member having an outer metal tube of corrosion-prone material and an inner metal lining of corrosion-resistant material, the first tubular member forming a first pin connection having a nose portion comprising a ring of corrosion-re
A corrosion-resistant threaded connection including a first tubular member having an outer metal tube of corrosion-prone material and an inner metal lining of corrosion-resistant material, the first tubular member forming a first pin connection having a nose portion comprising a ring of corrosion-resistant material secured, e.g., welded, to the tube of corrosion-prone material, a radially outwardly facing, annularly extending thread-free first pin shoulder being formed on the corrosion-resistant ring, the first member including an externally threaded portion providing male threads, and a second tubular member comprising a metal coupling having a first end and a second end and forming a first box connection and a second box connection, respectively, the coupling including an internally disposed annularly extending metal section of corrosion-resistant material disposed intermediate the ends of the coupling, each of the box connections comprising a radially inwardly facing, annularly extending box shoulder formed on the section of corrosion-resistant material, each of the box connections further including a threaded female portion having threads complementary to the male threads, the pin and box shoulders being sized and configured such that when respective ones of the first pin connections are threadedly received in the first and second box connections, the pin and box shoulders are in metal-to-metal sealing engagement.
대표청구항
▼
1. A workpiece for use in making a corrosion-resistant, threaded tubular member, comprising:an outer metal tube of corrosion-prone material having a first end, a second end, and an inner surface, a first ring of corrosion-resistant material secured to said first end of said metal tube and having a f
1. A workpiece for use in making a corrosion-resistant, threaded tubular member, comprising:an outer metal tube of corrosion-prone material having a first end, a second end, and an inner surface, a first ring of corrosion-resistant material secured to said first end of said metal tube and having a first ring end surface axially spaced from said metal tube and an outwardly facing, annularly extending, thread free pin shoulder, a first annular securing locus formed between said first ring and said first end of said metal tube, an inner metal tubular lining of corrosion-resistant material disposed in said outer tube, said metal lining having a first end, a second end, and an outer surface, said outer surface of said lining overlying said inner surface of said tube, said first end of said lining being secured to said first ring at a second annular securing locus axially spaced from both said first annular securing locus and said first ring end surface. 2. The workpiece of claim 1 wherein said first annular securing locus comprises an annular weld.3. The workpiece of claim 1 wherein said lining is secured to said tube.4. The workpiece of claim 1 wherein a second ring of corrosion-resistant material is secured to said second end of said metal tube, a second annular securing locus being formed between said second ring and said second end of said metal tube, said outer surface of said lining overlying said second annular securing locus, said second end of said lining being secured to said second ring.5. The workpiece of claim 1, wherein said second annular securing locus is axially spaced between the first annular securing locus and said first ring end surface.6. The workpiece of claim 1, wherein the second annular securing locus is axially spaced opposite said first ring end surface with respect to said first annular securing locus.7. The workpiece of claim 1, wherein said first ring includes at least a portion of a first one of male threads.8. A method of forming a workpiece for use in making a corrosion-resistant, threaded tubular member, comprising:providing a metal tube of corrosion-prone material, said metal tube having a first end and a second end; securing said first end of said metal tube to a first ring of corrosion-resistant material by permanently bonding said first ring to said first end of said metal tube to form a first annular securing locus between said first ring and said first end of said tube, said first ring having a first ring end surface axially spaced from the metal tube; forming a first radially outwardly facing, annularly extending, thread-free pin shoulder on said first ring; providing a metal tubular liner of corrosion-resistant material, said liner having a first end and a second end; and disposing said liner in said tube, said liner overlying said first annular securing locus and being secured to said first ring at a second annular securing locus axially spaced from both said first annular securing locus and said first ring end surface. 9. The method of claim 8 wherein said securing of said first ring to said first end of said metal tube is accomplished by welding.10. The method of claim 9 wherein said welding is conducted by friction welding.11. The method of claim 10 wherein said metal tubular liner is secured to said metal tube.12. The method of claim 8, further comprising:securing to said second end of said metal tube a second ring of corrosion-resistant material by permanently bonding said second ring to said second end of said metal tube to form another annular securing locus between said second ring and said first end, said liner overlying said another annular securing locus and being secured to said second ring. 13. The method of claim 12 wherein said securing of said second ring to said second end is accomplished by welding.14. The method of claim 13 wherein said welding is conducted by friction welding.15. The method claim 12 wherein said second ring has a second end surface distal said another annular securing locus, said second end of said liner being welded to said second ring.16. The method of claim 8, further comprising:forming a first axially extending, externally threaded portion on said metal tube and said first ring providing male threads, said first annular securing locus being disposed intermediate said first ring end surface and said second annular securing locus. 17. The method of claim 8, wherein said second annular securing locus is axially spaced between the first annular securing locus and said first ring end surface.18. The method of claim 8, wherein the second annular securing locus is axially spaced opposite said first ring end surface with respect to said first annular securing locus.19. A method of forming a corrosion-resistant, externally threaded tubular member, comprising:providing a metal tube of corrosion-prone material, said metal tube having a first end and a second end; securing to said first end of said metal tube a first ring of corrosion-resistant material by permanently bonding said first ring to said first end of said metal tube to form a first annular securing locus between said first ring and said first end of said metal tube, said first ring forming a first end surface; providing a metal tubular liner of corrosion-resistant material, said liner having a first end and a second end; disposing said liner in said tube, said liner overlying said first annular securing locus and being secured to said first ring; and forming a first axially extending, externally threaded portion providing at least a portion of a first one of male threads on said first ring, said first threaded portion extending axially inwardly of said first pin end surface and being at least partially formed on said tube, said first securing locus being disposed intermediate said first end surface and the end of said first externally threaded portion distal said first end surface. 20. The method of claim 19 including forming a first radially outwardly facing, annularly extending, threadfree pin shoulder on said first ring.21. The method of claim 19, comprising securing a second ring of corrosion-resistant material to said second end of said tube by permanently bonding said second ring to said second end of said tube to form a second annular securing locus between said second ring and said second end of said metal tube, said second ring forming a second end surface; andforming a second, axially extending, externally threaded portion providing male threads, said second threaded portion extending axially inwardly of said second end surface and being at least partially formed on said metal tube, said second securing locus being disposed intermediate said second end surface and the end of said second externally threaded portion distal said second end surface. 22. The method of claim 21, including forming a first radially outwardly facing, annularly extending, threadfree pin shoulder on said first ring.23. The method of claim 21, comprising forming at least a portion of one of said male threads of said second threaded portion on said second ring.
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