CN104651594A - Thick-wall heavy-caliber duct joint heat processing technology used for deep-sea petroleum drilling and exploitation - Google Patents
Thick-wall heavy-caliber duct joint heat processing technology used for deep-sea petroleum drilling and exploitation Download PDFInfo
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- CN104651594A CN104651594A CN201310579728.XA CN201310579728A CN104651594A CN 104651594 A CN104651594 A CN 104651594A CN 201310579728 A CN201310579728 A CN 201310579728A CN 104651594 A CN104651594 A CN 104651594A
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- 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
- C21D9/085—Cooling or quenching
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Abstract
The invention discloses a thick-wall heavy-caliber duct joint heat processing technology used for deep-sea petroleum drilling and exploitation. The technology comprises the following steps of: downwards installing a duct joint from a welding neck in a well-type quenching furnace vertically in furnace charging; keeping intervals among the periphery, the upper layer and the lower layer; keeping the temperature of a furnace at 871DEG C-899DEG C for at least 120 minutes; hoisting the duct joint out of a hearth, inputting into a quenching water tank at the water temperature of 30 DEG C-36 DEG C within 15 seconds for quenching for the first time; carrying out water cooling for at least 150 minutes, then sending into the furnace for normalizing treatment at the temperature of 899DEG C-940DEG C; carrying out tempering within 3 hours after the quenching for the first time, wherein the tempering temperature is 595DEG C-640DEG C; keeping the tempering temperature for at least 240 minutes; and then hoisting the duct joint out of the hearth, and putting the duct joint directly in a water channel for cooling to the normal temperature. According to the invention, the metal phase tissue is improved through repeated heat processing twice, and the mechanical performance is improved further so as to meet the deep-sea petroleum drilling and exploitation requirement.
Description
Technical field
The present invention relates to a kind of heavy wall large-diameter catheter joint thermal treatment process for deep-sea oil drilling.Belong to technical field of metal heat treatment.
Background technology
In the last hundred years, because of overexploitation oil, land and the shallow sea petroleum resource of some easy exploitations on the earth are increasingly exhausted, and under this severe situation, the target of oil production is gone to the ocean contained and enrich petroleum resources by various countries one after another, particularly region, deep-sea.The transfer of this kind of strategic industry, need be based upon have advanced deep-sea oil drilling and production technology and relevant equipment thereof basis on, just can accomplish the end in view.Deep-sea oil drilling depth reaches thousands of rice usually, tubes connection length used equally also needs thousands of rice, due to from great, also will bear the destruction of certain moment of torsion and anti-sea beaten, therefore have very high request to the quality index of pipe joint, just can accomplish reliable to connect and efficient sealed.Manufacture deep-sea oil drilling pipe joint usually to draw materials high strength alloy steel, because deep-sea oil drilling pipe aperture is large, supporting pipe joint bore is large equally, and wall thickness is very thick, with the not easily through hardening of normative heat treatment technique, easily remain the internal stress of higher value after quenching, the crackle caused by internal stress is the important factor that pipe joint was lost efficacy, once the financial loss that generation fracture accident produces is very huge.Therefore, people urgently expect have one to overcome above-mentioned deficiency for deep-sea oil drilling heavy wall large-diameter catheter joint thermal treatment process.
Summary of the invention
The present invention is mainly for the feature of large-sized heavy-wall tube, propose a kind of simple process, rationally, specification and workable heavy wall large-diameter catheter joint thermal treatment process, this technique adopts vertically-arranged Large space arrangement mode and increases the measure of soaking time, and improve metallographic structure by secondary quenching, double tempering, improve mechanical property further.
The present invention is achieved through the following technical solutions:
1. first time shove charge: pipe joint blank order loaded in well formula quenching furnance, down, the pipe joint blank periphery of vertically-arranged and levels spacing are at 25 ~ 50 mm for weldering neck end.
2. first time quenching: furnace temperature was risen to 871 DEG C ~ 899 DEG C by (1) in 60 ± 5 minutes, then started insulation, and soaking time calculates with 40 minutes by every 25.4 mm wall thickness, and minimum is 120 minutes.(2) within 5 ~ 10 minutes before pipe joint blank is come out of the stove, start to stir the water in quenching pond, water temperature controls at 30 DEG C ~ 36 DEG C.(3) self-conductance tube joint blank hangs out from burner hearth the time entered quenching bath and is less than 15 seconds, at least 15 minutes water-cooled time, and by circulating water, at the end of quenching, water temperature is no more than 46 DEG C.
3. normalizing: carry out furnace temperature 899 DEG C ~ 940 DEG C, normalizing soaking time calculates with 30 minutes by 25.4 mm wall thickness.
4. first time tempering: carry out temper in pipe joint blank first time quenches latter 3 hours, furnace temperature is risen to 595 DEG C ~ 640 DEG C after shove charge, soaking time calculates with 80 minutes by every 25.4 mm wall thickness, minimum is 240 minutes, is then hung out directly to be put in tank from burner hearth by pipe joint blank to cool normal temperature.
5. second time shove charge: reload in stove by above-mentioned heat-treatment pipe joint blank, charging technique requires and the same first time shove charge of parameter.
6. second time quenching: repeat first time quenching Step, all processing parameters are identical.
7. second time tempering: carry out temper in pipe joint blank second time is quenched latter 3 hours, furnace temperature is risen to 605 DEG C ~ 650 DEG C after shove charge, soaking time calculated by every 80 minutes 25.4 mm wall thickness used times, minimum is 240 minutes, is then hung out directly to be put in tank from burner hearth by pipe joint blank to cool normal temperature.
As further improving countermeasure, second time quenching preferable temperature is 890 ± 5 DEG C, and second time tempering preferable temperature is 620 ± 5 DEG C.
The invention has the beneficial effects as follows: pipe joint blank vertically-arranged Large space arrange, be easy to do homogeneous heating and thermal distortion little; Water temperature in accurate control quenching pond and homogeneity, quench media temperature is consistent, stable in quenching quality; Adopt secondary quenching and double tempering process, further refinement metallographic structure, reduce metal internal stress, improve material anti-fatigue performance; Determine according to wall thickness and suitably increase soaking time, guarantee different wall material can fully, uniform thermal treatment.
Embodiment
The invention will be further described in conjunction with the embodiments.
Pipe joint bore 552mm in the present embodiment, thickest 48mm, material is 30CrMo, and apply heavy wall large-diameter catheter joint thermal treatment process of the present invention, it comprises the following steps:
1. first time shove charge: pipe joint blank order is loaded in well formula quenching furnance, welds neck end down, the pipe joint blank periphery of vertically-arranged and levels interval 25mm.
2. first time quenching: furnace temperature was risen to 885 DEG C by (1) in 60 ± 5 minutes, was then incubated, and soaking time calculates with 40 minutes by every 25.4 mm wall thickness, the present embodiment soaking time 20 minutes.(2) within 10 minutes before pipe joint blank is come out of the stove, start to stir the water in quenching pond, water temperature controls at 30 DEG C ~ 36 DEG C.(3) self-conductance tube joint blank hangs out from burner hearth the time entered quenching bath and is less than 15 seconds, water-cooled 15 minutes, by circulating water, controls water temperature and be no more than 46 DEG C at the end of quenching.
3. normalizing: carry out furnace temperature 920 DEG C, normalizing soaking time calculated by 30 minutes 25.4 mm wall thickness used times, and the present embodiment normalizing soaking time is 60 minutes.
4. first time tempering: pipe joint blank first time quench rear 2 hours 45 points make temper, after shove charge, furnace temperature is risen to 610 DEG C, soaking time calculated by every 80 minutes 25.4 mm wall thickness used times, the actual soaking time of the present embodiment 240 minutes, then hangs out directly to be put in tank by pipe joint blank and cools normal temperature from burner hearth.
5. second time shove charge: reload in stove by above-mentioned heat-treatment pipe joint blank, charging technique requires and the same first time shove charge of parameter.
6. second time quenching: repeat first time quenching Step, all processing parameters are identical.
7. second time tempering: quench in pipe joint blank second time and make temper in rear 2 hours 30 minutes, after shove charge, furnace temperature is risen to 620 DEG C, soaking time calculated by every 80 minutes 25.4 mm wall thickness used times, the present embodiment is incubated 240 minutes, is then hung out directly to be put in tank from burner hearth by pipe joint blank to cool normal temperature.
Claims (2)
1., for the heavy wall large-diameter catheter joint thermal treatment process of deep-sea oil drilling, it is characterized in that comprising the following steps:
(1) first time shove charge: pipe joint blank order is loaded in well formula quenching furnance, down, the pipe joint blank periphery of vertically-arranged and levels spacing are at 25 ~ 50 mm for weldering neck end;
(2) first time quenching: 1) furnace temperature was risen to 871 DEG C ~ 899 DEG C in 60 ± 5 minutes, then start insulation, soaking time calculates with 40 minutes by every 25.4 mm wall thickness, and minimum is 120 minutes; 2) within 5 ~ 10 minutes before pipe joint blank is come out of the stove, start to stir the water in quenching pond, water temperature controls at 30 DEG C ~ 36 DEG C: 3) self-conductance tube joint blank hangs out from burner hearth the time entered quenching bath and is less than 15 seconds, at least 15 minutes water-cooled time, by circulating water, at the end of quenching, water temperature is no more than 46 DEG C;
(3) normalizing: carry out furnace temperature 899 DEG C ~ 940 DEG C, normalizing soaking time calculates with 30 minutes by 25.4 mm wall thickness;
(4) first time tempering: carry out temper in pipe joint blank first time quenches latter 3 hours, furnace temperature is risen to 595 DEG C ~ 640 DEG C after shove charge, soaking time calculates with 80 minutes by every 25.4 mm wall thickness, minimum is 240 minutes, is then hung out directly to be put in tank from burner hearth by pipe joint blank to cool normal temperature;
(5) second time shove charge: above-mentioned heat-treatment pipe joint blank is reloaded in stove, charging technique requires and the same first time shove charge of parameter;
(6) second time quenching: repeat first time quenching Step, all processing parameters are identical;
(7) second time tempering: carry out temper in pipe joint blank second time is quenched latter 3 hours, furnace temperature is risen to 605 DEG C ~ 650 DEG C after shove charge, soaking time calculated by every 80 minutes 25.4 mm wall thickness used times, minimum is 240 minutes, is then hung out directly to be put in tank from burner hearth by pipe joint blank to cool normal temperature.
2. the heavy wall large-diameter catheter joint thermal treatment process for deep-sea oil drilling according to claim l, is characterized in that: described quenching preferable temperature is 890 ± 5 DEG C, and second time tempering preferable temperature is 620 ± 5 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310579728.XA CN104651594A (en) | 2013-11-19 | 2013-11-19 | Thick-wall heavy-caliber duct joint heat processing technology used for deep-sea petroleum drilling and exploitation |
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| CN201310579728.XA CN104651594A (en) | 2013-11-19 | 2013-11-19 | Thick-wall heavy-caliber duct joint heat processing technology used for deep-sea petroleum drilling and exploitation |
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| CN104651594A true CN104651594A (en) | 2015-05-27 |
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| CN201310579728.XA Pending CN104651594A (en) | 2013-11-19 | 2013-11-19 | Thick-wall heavy-caliber duct joint heat processing technology used for deep-sea petroleum drilling and exploitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113667815A (en) * | 2021-08-19 | 2021-11-19 | 海隆石油工业集团有限公司 | Heat treatment process for welding area of sulfur-resistant drill rod and drill rod prepared by heat treatment process |
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2013
- 2013-11-19 CN CN201310579728.XA patent/CN104651594A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113667815A (en) * | 2021-08-19 | 2021-11-19 | 海隆石油工业集团有限公司 | Heat treatment process for welding area of sulfur-resistant drill rod and drill rod prepared by heat treatment process |
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Application publication date: 20150527 |