|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||285/055; 285/333; 285/383; 285/329|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 11 인용 특허 : 21|
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 por...
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...