JPS5638421A - Manufacture of steel pipe for oil well with excellent collapsing strength - Google Patents
Manufacture of steel pipe for oil well with excellent collapsing strengthInfo
- Publication number
- JPS5638421A JPS5638421A JP11371879A JP11371879A JPS5638421A JP S5638421 A JPS5638421 A JP S5638421A JP 11371879 A JP11371879 A JP 11371879A JP 11371879 A JP11371879 A JP 11371879A JP S5638421 A JPS5638421 A JP S5638421A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- oil well
- pinch roll
- pressing force
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE:To raise the collapsing strength of a steel pipe for oil well by subjecting the steel pipe to a heat treatment in which the steel pipe is fixed by a pinch roll under a specifically relative condition of the heating temperature and the pressing force of the pinch roll. CONSTITUTION:In the heat treatment of a long steel pipe D for oil well, the steel pipe D is fixed by a self-weight-cancelling type pinch roll E on outer both ends and plural positions at central part of the heat treatment equipments A, B, and C and heated to a specific temperature under the pressing force of the pinch roll E. In this case, the relation between the heating temperature and the pressing force of the pinch roll E for heat treating steel pipe D is kept to the conditions of temperature and pressing force within the region surrounded by the points A, B, C, and D at the third time. Thereby, steel pipe for oil well, having excellent collapsing strength can be manufactured.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11371879A JPS6027732B2 (en) | 1979-09-05 | 1979-09-05 | Manufacturing method for oil well steel pipes with excellent collapse strength |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11371879A JPS6027732B2 (en) | 1979-09-05 | 1979-09-05 | Manufacturing method for oil well steel pipes with excellent collapse strength |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5638421A true JPS5638421A (en) | 1981-04-13 |
JPS6027732B2 JPS6027732B2 (en) | 1985-07-01 |
Family
ID=14619376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11371879A Expired JPS6027732B2 (en) | 1979-09-05 | 1979-09-05 | Manufacturing method for oil well steel pipes with excellent collapse strength |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6027732B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008267475A (en) * | 2007-04-19 | 2008-11-06 | Denso Corp | Electromagnetic actuator |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0228629U (en) * | 1988-08-17 | 1990-02-23 |
-
1979
- 1979-09-05 JP JP11371879A patent/JPS6027732B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008267475A (en) * | 2007-04-19 | 2008-11-06 | Denso Corp | Electromagnetic actuator |
Also Published As
Publication number | Publication date |
---|---|
JPS6027732B2 (en) | 1985-07-01 |
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