CN108148983A - The heat treatment process of drill pipe body - Google Patents
The heat treatment process of drill pipe body Download PDFInfo
- Publication number
- CN108148983A CN108148983A CN201611105043.1A CN201611105043A CN108148983A CN 108148983 A CN108148983 A CN 108148983A CN 201611105043 A CN201611105043 A CN 201611105043A CN 108148983 A CN108148983 A CN 108148983A
- Authority
- CN
- China
- Prior art keywords
- drill pipe
- pipe body
- heat treatment
- treatment process
- temperature
- 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.)
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of heat treatment process of drill pipe body, including quenching, tempering heat treatment, are operated as follows with technological parameter：1. it quenches, a, drill pipe body is transported to and be warming up in 880 DEG C 930 DEG C of step-by-step movement glowing furnace, 40 60 minutes are kept the temperature, 10 DEG C 30 DEG C of quenching liquid is entered after b, drill pipe body are come out of the stove, in 15 seconds, cool time is no less than 30 seconds, 2. being tempered, drill pipe body is transported to and is warming up in 560 DEG C 590 DEG C of step-by-step movement tempering furnace, keep the temperature 60 85 minutes, drill pipe body is come out of the stove again, cooled to room temperature.Using the present invention, the ballistic work performance of drilling rod is good, exceeds more than 30% than V150 grade of steels standard value；The mechanical index such as intensity, the elongation percentage of the drill pipe body after heat treatment reach the requirement of V150 grade of steels, and qualification rate is up to more than 98%；And the present invention heat treatment operation step, technological parameter it is reasonable.
Description
Technical field
The present invention relates to a kind of heat treatment process of tube body, especially a kind of to manufacture with the drill pipe compared with high-mechanical property
The quenching of body, tempering process can reach the standard of V150 grade of steels.
Background technology
Oil drill rocker is the main tool of oil drilling, and structure includes drill pipe body and the drilling rod connecting at drill pipe body both ends
Head.In the exploitation and extractive process of oil gas, it is desirable that drill pipe body allow for bearing huge interior external pressure, distortion, bending and
Vibration.
With the continuous development of petroleum industry, more and more deep-wells, ultradeep well are developed, this just proposes more drilling rod
Carry out higher requirement.It is S135 grade of steels that intensity is highest in API series drilling rod at present, but with the increase of drilling depth, to boring
The intensity requirement of bar is also being continuously increased, and the drilling rod of S135 grade of steels can not meet the requirement of part deep-well.
External drilling rod industry proposes the standard of this new grade of steel of drilling rod industry of V150 grade of steels.V150 steel grade drill pipes are to former material
Material and heat treatment capacity propose higher requirement.Heat treatment process disclosed in the country at present is extremely difficult to V150 grade of steels brill
The technology requirement of bar, the tensile property of the drill pipe body after being especially heat-treated cannot be met the requirements, relevant heat treatment process
Foreign countries also have not been reported.
Invention content
The technical problem to be solved in the present invention is to provide the brills that a kind of reliable, easy to operation manufacture meets V150 grade of steels
The heat treatment process of rod tube body.
In order to solve the above technical problems, the technical solution used in the present invention includes quenching, tempering, for heat treatment process
Steel grades and content be C：0.24-0.30, Cr：0.85-1.20, Mo：0.50-0.75, V：0-0.05, Si：0.10-
0.40, Mn：0.60-1.00, Cu：0-0.05, S：≤ 0.015, P：≤ 0.020, surplus Fe, unit is mass percent, is pressed
Following steps and technological parameter are operated：
1. it quenches
A, drill pipe body is transported in the step-by-step movement glowing furnace for being warming up to 880 DEG C -930 DEG C, keeps the temperature 40-60 minutes,
B, enter 10 DEG C -30 DEG C of quenching liquid after drill pipe body is come out of the stove, in 15 seconds, the cool time is no less than 30 seconds；
2. it is tempered
Drill pipe body is transported in the step-by-step movement tempering furnace for being warming up to 560 DEG C -590 DEG C, keeps the temperature 60-85 minutes, then will
Drill pipe body is come out of the stove, cooled to room temperature.
Further improve is：
Quenched drill pipe body was tempered in four hours.
The quenching liquid is tap water, and the temperature of quenching liquid is adjusted by cooling tower.
Quenching Step 1. described in drill pipe body carry out rotation in quenching liquid, autorotation speed is 70-100 revs/min.
It is 1. 2. handled with step according to step after drill pipe body is not more than 200, makees the machine of 1 upset end and drill pipe body
Tool performance test, pilot project is tensile strength and ballistic work, after qualified, storage.This step is to strengthen quality monitoring.Institute
1. and 2. the underproof drill pipe body of ballistic work experiment stated is quenched again according to step, tempering heat treatment, quench again,
The number of tempering heat treatment is no more than three times.
During described ballistic work pass the test, 2. the higher drill pipe body of tensile strength is tempered again according to step,
Times of tempering is no more than three times, 1. and 2. the drill pipe body of low cross-intensity is quenched according to step, is tempered hot place again
Reason, quenching, tempering heat treatment number are no more than three times again.
After being heat-treated using the present invention to the drill pipe body of above-mentioned steel grade, the ballistic work performance of drill pipe body is good, with
The 54J of V150 grade of steel standard values is compared, beyond more than 30%；And the power such as intensity, elongation percentage of drill pipe body after being heat-treated
The requirement that index reaches V150 grade of steels is learned, has filled up blank both domestic and external；The heat treatment step that the present invention is set is simple, technique
Rational Parameters handle qualification rate up to more than 98%.
Specific embodiment
Invention is described in further detail below by specific embodiment.
Using the drill pipe body of certain company, chemical composition is C：0.26, Cr：0.98, Mo：0.64, V：0.005, Si：
0.22, Mn：0.75, Cu：0.03, S：0.001, P：0.008, surplus Fe, unit is mass percent.According to the following steps into
Row heat treatment：
1. it quenches
A, drill pipe body is transported in the step-by-step movement glowing furnace for being warming up to 910 DEG C, keeps the temperature 60 minutes；
B, enter 23 DEG C of quenching liquid after drill pipe body is come out of the stove, in 15 seconds, quenching liquid is tap water, and with 88 revs/min
The rate of clock carries out rotation, and 40 seconds cool times, the temperature of wherein quenching liquid is adjusted by cooling tower, and drill pipe body is with a constant speed
Rate rotation is for quick, uniform hardening, forms tiny, uniform grain structure.
2. it is tempered
In quenching 1 hour, drill pipe body is transported in the step-by-step movement tempering furnace for being warming up to 575 DEG C, keeps the temperature 70 minutes；Again
Drill pipe body is come out of the stove, cooled to room temperature.Through more than heat treatment step, the mechanical performance of drill pipe body is as follows：
The mechanical performance of above-mentioned drill pipe body meets following V150 grade of steels technology requirements：
Yield strength 1034-1138MPa
Tensile strength >=1103MPa
Elongation percentage >=13.0%
Charpy-V impact power (21 DEG C) longitudinal direction >=54J.
The metallographic structure of heat treatment process treated the tube body of drill pipe body through the present invention, uniform small grains add
Thick end inside and outside wall is 10 grades, 9 grades of inboard wall of tube body, 9.5 grades of outer wall, is the tension of drill pipe body, antifatigue etc. performance
Provide guarantee.
It is quenched according to above-mentioned steps, after tempering heat treatment drill pipe body 100, makees the machine of 1 upset end and drill pipe body
For tool performance test as quality monitoring, pilot project is tensile strength and ballistic work.Two result of the tests meet V150 grade of steels
Technology requirement, 100 drill pipe bodies of above-mentioned processing are put in storage.
1. and 2. if the underproof drill pipe body of ballistic work experiment is quenched again according to step, tempering heat treatment, weight
It newly quenches, the number of tempering heat treatment is no more than three times.
When ballistic work pass the test, 2. the higher drill pipe body of tensile strength is tempered again according to step, tempering
Number is no more than three times, and 1. and 2. the drill pipe body of low cross-intensity is quenched again according to step, tempering heat treatment, weight
New quenching, tempering heat treatment number are no more than three times.
Claims (3)
1. a kind of heat treatment process of drill pipe body, including quenching, being tempered, for the steel grades and content of heat treatment process
For C：0.24-0.30, Cr：0.85-1.20, Mo：0.50-0.75, V：0-0.05, Si：0.10-0.40, Mn：0.60-1.00,
Cu：0-0.05, S：≤ 0.015, P：≤ 0.020, surplus Fe, unit is mass percent, which is characterized in that as follows
It is operated with technological parameter：
1. it quenches
A, drill pipe body is transported in the step-by-step movement glowing furnace for being warming up to 880 DEG C -930 DEG C, keeps the temperature 40-60 minutes,
B, enter 10 DEG C -30 DEG C of quenching liquid after drill pipe body is come out of the stove, in 15 seconds, the cool time is no less than 30 seconds, described
Drill pipe body carries out rotation in quenching liquid, and autorotation speed is 70-100 revs/min, and the quenching liquid is tap water, is quenched
The temperature of liquid is adjusted by cooling tower,
2. it is tempered
Drill pipe body is transported in the step-by-step movement tempering furnace for being warming up to 560 DEG C -590 DEG C, keeps the temperature 60-85 minutes, then by drilling rod
Tube body is come out of the stove, cooled to room temperature.
2. the heat treatment process of drill pipe body according to claim 1, it is characterised in that quenched drill pipe body is four
It is tempered in hour.
3. the heat treatment process of drill pipe body according to claim 1, which is characterized in that 1. 2. locate with step according to step
After reason drill pipe body is not more than 200, the mechanical test of 1 upset end and drill pipe body is done, pilot project is strong for tension
Degree and ballistic work, warehousing after passing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105043.1A CN108148983A (en) | 2016-12-05 | 2016-12-05 | The heat treatment process of drill pipe body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105043.1A CN108148983A (en) | 2016-12-05 | 2016-12-05 | The heat treatment process of drill pipe body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108148983A true CN108148983A (en) | 2018-06-12 |
Family
ID=62470948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611105043.1A Pending CN108148983A (en) | 2016-12-05 | 2016-12-05 | The heat treatment process of drill pipe body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108148983A (en) |
-
2016
- 2016-12-05 CN CN201611105043.1A patent/CN108148983A/en active Pending
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Application publication date: 20180612 |