发明名称 |
Method of making a blast joint |
摘要 |
The present application discloses and claims the method of producing a blast joint for oil well production tubing. The method disclosed and claimed herein relates to assembling, upon the exterior of a length of production tubing, a stack of short length refractory rings resistant to abrasion and capable of enduring high temperature, to be used in a string of oil well production tubing.
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申请公布号 |
US4028796(A) |
申请公布日期 |
1977.06.14 |
申请号 |
US19760699194 |
申请日期 |
1976.06.23 |
申请人 |
BERGSTROM, ARTHUR EVERETT |
发明人 |
BERGSTROM, ARTHUR EVERETT |
分类号 |
B23K20/08;E21B17/00;E21B17/042;E21B17/10;(IPC1-7):B23P17/00 |
主分类号 |
B23K20/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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