CN108265231A - A kind of complex geological condition oil gas well mining casing and preparation method thereof - Google Patents

A kind of complex geological condition oil gas well mining casing and preparation method thereof Download PDF

Info

Publication number
CN108265231A
CN108265231A CN201711492421.0A CN201711492421A CN108265231A CN 108265231 A CN108265231 A CN 108265231A CN 201711492421 A CN201711492421 A CN 201711492421A CN 108265231 A CN108265231 A CN 108265231A
Authority
CN
China
Prior art keywords
casing
gas well
oil gas
complex geological
preparation
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.)
Pending
Application number
CN201711492421.0A
Other languages
Chinese (zh)
Inventor
邓叙燕
冯莹
李健强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DALIPAL PIPE Co
Original Assignee
DALIPAL PIPE Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DALIPAL PIPE Co filed Critical DALIPAL PIPE Co
Priority to CN201711492421.0A priority Critical patent/CN108265231A/en
Publication of CN108265231A publication Critical patent/CN108265231A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Earth Drilling (AREA)

Abstract

The present invention relates to petroleum casing pipe technical fields, specifically disclose a kind of complex geological condition oil gas well mining casing and preparation method thereof.Described sleeve pipe includes tube body and box cupling, is counted using the tube body quality of described sleeve pipe as 100%, and the tube body includes the following chemical element component of mass percent：0.24%≤C≤0.28%, 0.15%≤Si≤0.35%, 0.40%≤Mn≤0.55%, S≤0.003%, P≤0.012%, 0.02%≤Al≤0.04%, 0.90%≤Cr≤1.10%, 0.10%≤Mo≤0.30%, 0.01%≤Ti≤0.04%, 0.002%≤Ca≤0.004%, remaining is Fe and inevitable impurity.Complex geological condition oil gas well mining casing provided by the invention, alloying component system is simple, by rationally controlling the constituent contents such as C, Mn and preparation technology parameter, make casing that there is preferable comprehensive performance, and with higher collapsoing strength, it can be widely applied to the exploitation of the complex geological conditions oil/gas wells such as halite layer, shale layer, perforated interval water injection well.

Description

A kind of complex geological condition oil gas well mining casing and preparation method thereof
Technical field
The present invention relates to petroleum casing pipe technical field more particularly to a kind of complex geological condition oil gas well mining casing and Preparation method.
Background technology
It is predicted according to internal authority mechanism, from 2000-2030, the demand of world oil increases by 1.6% every year, the year two thousand thirty It is up to 57.69 hundred million tons；The demand of natural gas increases by 2.4% every year, and the year two thousand thirty is up to 42.03 hundred million tons of oil equivalents.With The continuous of petroleum gas demand increases and easily exploits gradually decreasing for petroleum resources, the exploitation of severe geological conditions oil/gas well Can gradually it increase.The oil/gas well of the complex geological conditions such as halite layer, shale layer, perforated interval water injection well will to the anti-crowded performance of casing Ask very high.If selecting API casings that can only rely on improves wall thickness and grade of steel to improve the collapsoing strength of casing, this makes casing string Weight increases, and wellbore reduces or casing reduces with borehole wall annular space, and high collapse strength is selected just to solve the problems, such as these, and can Reduce cost.In addition, about 8,500,000,000 tons of the non-verified oil reserves in China, wherein buried there are about 73% it is very deep, it is continuous with well depth It improves, the crowded problem of ruining of casing will be increasingly severe.As China Zhongyuan Oil Field set damage in reached due to casing collapse ratio 75%, Central Plains, the annual workover cost of two elephant of Liaohe Oil Field are more than 90,000,000 yuan.Therefore, the demand of high collapse-resistance casing Will gradually it increase.
High Anti-collapse Oil Casing is to the uniformity of steel, material yield strength, residual stress, radius-thickness ratio value, dimensional accuracy There are strict requirements, belong to high technology content product.Therefore each main petroleum casing pipe manufacturer and research department in the world Door has carried out non-API standard High Anti-collapse Oil Casing a large amount of research and development, and high anti-jamming series sleeve is crushed Failure mechanism, influence factor, production system etc. have carried out further investigated.
In existing technology, alloying component system complexity, the cost of steel pipe are higher；And without the production skill of open box cupling Art.
Invention content
For existing oil casing pipe steel pipe alloying component system it is complicated, cost is higher the problems such as, the present invention provides one Kind complex geological condition oil gas well mining casing and preparation method thereof.
To achieve the above object of the invention, the embodiment of the present invention employs following technical solution：
A kind of complex geological condition oil gas well mining casing, described sleeve pipe includes tube body and box cupling, with described sleeve pipe Tube body quality is 100% meter, and the tube body includes the following chemical element component of mass percent：0.24%≤C≤0.28%, 0.15%≤Si≤0.35%, 0.40%≤Mn≤0.55%, S≤0.003%, P≤0.012%, 0.02%≤Al≤ 0.04%th, 0.90%≤Cr≤1.10%, 0.10%≤Mo≤0.30%, 0.01%≤Ti≤0.04%, 0.002%≤Ca≤ 0.004%, remaining is Fe and inevitable impurity；It is counted using the box cupling quality of described sleeve pipe as 100%, the box cupling includes matter Measure the following chemical element component of percentage：0.24%≤C≤0.28%, 0.15%≤Si≤0.35%, 0.40%≤Mn≤ 0.55%th, S≤0.003%, P≤0.012%, 0.02%≤Al≤0.04%, 0.90%≤Cr≤1.10%, 0.10%≤Mo ≤ 0.30%, 0.01%≤Ti≤0.04%, 0.002%≤Ca≤0.004%, remaining is Fe and inevitable impurity.
Relative to the prior art, complex geological condition oil gas well mining casing provided by the invention, alloying component system Simply, by rationally controlling the constituent contents such as C, Mn and preparation technology parameter, make casing that there is preferable comprehensive performance, and anti-crowded Intensity be higher than API 5CT (the 45th edition) standard requirement more than 30% collapsoing strength, can be widely applied to halite layer, shale layer, The exploitation of the oil/gas well of the complex geological conditions such as perforated interval water injection well.
Further, the present invention also provides the preparation methods of the complex geological condition oil gas well mining casing.It should Preparation method includes the following steps：
Described sleeve pipe includes tube body and box cupling, wherein,
The preparation method of the tube body includes the following steps：
Continuous cast round billets are provided, by the continuous cast round billets after annular furnace heats, into eleven punch 11 processing, obtain hollow billet；
The hollow billet is subjected to rolling process, obtains hollow forging；
By the hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains the tube body of casing；And/or
The preparation method of the box cupling includes the following steps：
Continuous cast round billets are provided, by the continuous cast round billets after annular furnace heats, into eleven punch 11 processing, obtain hollow billet；
The hollow billet is subjected to rolling process, obtains hollow forging；
By the hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains the box cupling crude product of casing；
The box cupling crude product is subjected to screw thread processing, obtains casing coupling.
Relative to the prior art, the preparation method of complex geological condition oil gas well mining casing provided by the invention, work Skill is simple, of low cost, by the Proper Match of alloying component and preparation process, improves the collapsoing strength of casing.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.
Fig. 1 is the electricity of film layer after the box cupling screw thread of complex geological condition oil gas well mining casing of the embodiment of the present invention is handled Mirror figure one；
Fig. 2 is the electricity of film layer after the box cupling screw thread of complex geological condition oil gas well mining casing of the embodiment of the present invention is handled Mirror figure two；
Fig. 3 is the electricity of film layer after the box cupling screw thread of complex geological condition oil gas well mining casing of the embodiment of the present invention is handled Mirror figure three.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
The embodiment of the present invention provides a kind of complex geological condition oil gas well mining casing.The complex geological condition oil/gas well Exploitation includes tube body and box cupling with casing, is counted using the tube body quality of described sleeve pipe as 100%, and the tube body includes mass percent Following chemical element component：0.24%≤C≤0.28%, 0.15%≤Si≤0.35%, 0.40%≤Mn≤0.55%, S ≤ 0.003%, P≤0.012%, 0.02%≤Al≤0.04%, 0.90%≤Cr≤1.10%, 0.10%≤Mo≤ 0.30%th, 0.01%≤Ti≤0.04%, 0.002%≤Ca≤0.004%, remaining is Fe and inevitable impurity；With institute The box cupling quality for stating casing is 100% meter, and the box cupling includes the following chemical element component of mass percent：0.24%≤C ≤ 0.28%, 0.15%≤Si≤0.35%, 0.40%≤Mn≤0.55%, S≤0.003%, P≤0.012%, 0.02%≤ Al≤0.04%, 0.90%≤Cr≤1.10%, 0.10%≤Mo≤0.30%, 0.01%≤Ti≤0.04%, 0.002%≤ Ca≤0.004%, remaining is Fe and inevitable impurity.
Preferably, outside diameter ovality≤0.5%D of described sleeve pipe, eccentricity≤10%t, wherein, D is casing Nominal diameter, the nominal wall thickness that t is casing, to meet the requirement of the size of casing.
Preferably, the pipe residual stress≤100MPa, to improve the collapsoing strength of casing.
Complex geological condition oil gas well mining casing provided in an embodiment of the present invention, alloying component system is simple, passes through Rationally constituent contents and the preparation technology parameter such as control C, Mn, makes casing have preferable comprehensive performance, and collapsoing strength is higher than More than 30% collapsoing strength of API 5CT (the 45th edition) standard requirement can be widely applied to halite layer, shale layer, perforated interval note The exploitation of the oil/gas well of the complex geological conditions such as well.
It is multiple to still further provide this under the premise of the complex geological condition oil gas well mining casing is provided by the present invention The preparation method of miscellaneous geological conditions oil gas well mining casing.
In one embodiment, which includes the following steps：
Described sleeve pipe includes tube body and box cupling, wherein,
The preparation method of the tube body includes the following steps：
Continuous cast round billets are provided, by the continuous cast round billets after annular furnace heats, into eleven punch 11 processing, obtain hollow billet；
The hollow billet is subjected to rolling process, obtains hollow forging；
By the hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains the tube body of casing；And/or
The preparation method of the box cupling includes the following steps：
Continuous cast round billets are provided, by the continuous cast round billets after annular furnace heats, into eleven punch 11 processing, obtain hollow billet；
The hollow billet is subjected to rolling process, obtains hollow forging；
By the hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains the box cupling crude product of casing；
The box cupling crude product is subjected to screw thread processing, obtains casing coupling.
Explanation is further explained to above-mentioned preparation method below：
Preferably, the continuous cast round billets connect using steel scrap as raw material through arc melting, LF refining, vacuum outgas, round billet It is obtained after casting, strand slow cooling processing, of low cost using steel scrap as raw material, energy conservation and environmental protection.
Preferably, in the annular furnace heat treatment, the temperature of bringing-up section is 1260~1300 DEG C, and the temperature of soaking zone is 1260~1280 DEG C, the tapping temperature of pipe is 1140~1160 DEG C, and continuous cast round billets is enable adequately to be heated, are made Continuous cast round billets internal/external heating is uniform, is conducive to the uniformity of perforation procedure hollow billet wall thickness.
Preferably, temperature >=800 DEG C of micro-tension reducing.
Preferably, in the annular furnace heat treatment, heating time of the continuous cast round billets in stove is >=120min, ensures ring The abundant progress of shape stove heat processing.
Preferably, the hardening and tempering method is as follows：880~910 DEG C will be heated to through the hollow forging that micro-tension reducing is handled After keep the temperature, using cooling by water；It keeps the temperature after steel pipe is heated to 550~720 DEG C, is cooled to room temperature using air-cooled；Again by steel pipe It is kept the temperature after being heated to 570~720 DEG C, using air-cooled cooling, makes straightening temperature >=450 DEG C of steel pipe, using the work of double tempering Skill advantageously reduces the residual stress of steel pipe.
Preferably, the cooling by water cools down the steel pipe after heating using the water-cooling pattern of outer leaching and interior spray, and Pipe end increases water charging system, is opened together with interior spray, it is caused cold since interior water spray cannot be full of can effectively to make up pipe end Non-uniform problem ensures the steel pipe uniformity of performance and the ovality of pipe end in the longitudinal direction.
Preferably, the screw thread processing includes the following steps：Degreasing, washing, table tune, phosphatization, pickling, washing, table tune, phosphorus Change, washing, antirust, drying and processing ensure densification and the uniformity of thread surface film layer, improve the resistance to corrosion of film layer and attached Ability, makes the upper shackle process not thread gluing of casing connection.
Preferably, the degreasing, washing, table reconcile solution used in phosphorating treatment using μ S/cm of conductivity≤500, chlorine The water of concentration≤50mg/L of ion is configured, and the total acidity control of solution used in phosphatization can reduce phosphatization 60~70 The generation of process sediment is conducive to densification and the uniformity of thread surface film layer.
Preferably, solution is stirred using compressed air in the degreasing, washing, table reconciliation phosphating step.
Preferably, the rolling process is realized using accurate oblique milling unit, wherein, accurate oblique milling unit background devices use Four-roller centering mode, closed type, the long deflector roll active rotation of following two, linear velocity and hollow forging phase are formed by four rollers Match, the short pressure roller of both the above passively rotates, and the swing of steel pipe is smaller in the operation of rolling, solves the problems, such as the scuffing of steel pipe, improves The uniformity and ovality of thickness of steel pipe.
This method preparation process is simple, of low cost using steel scrap as raw material, passes through the conjunction of alloying component and heat treatment process Reason matching improves the collapsoing strength of casing.
In order to better illustrate complex geological condition oil gas well mining casing provided in an embodiment of the present invention and its preparation Method is illustrated below by embodiment is further.
Embodiment 1
The preparation method of complex geological condition oil gas well mining casing, includes the following steps：
(1) it using steel scrap as raw material, is handled through 80t arc meltings, LF refining, vacuum outgas, round billet continuous casting, strand slow cooling Afterwards, continuous cast round billets are obtained, are counted using the quality of the continuous cast round billets as 100%, continuous cast round billets include the following member of mass percent Element；C：0.27%th, Si：0.21%th, Mn：0.50%th, S：0.002%th, P：0.009%th, Cr：0.95%th, Mo：0.20%th, Al： 0.024%th, Ti：0.02%th, Ca：0.0021%th, Ni：0.03%th, Cu：0.04%, remaining is Fe and inevitable impurity；
(2) by continuous cast round billets after annular furnace heats, into eleven punch 11 processing, hollow billet is obtained, wherein, annular stove heat In processing, the temperature of bringing-up section is 1260~1300 DEG C, and the temperature of soaking zone is 1260~1280 DEG C, tapping temperature for 1140~ 1160 DEG C, heating time >=120min of the continuous cast round billets in stove；
(3) hollow billet is subjected to rolling process by accurate oblique milling unit, obtains hollow forging；
(4) by hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains outer diameter as 244.48mm, wall thickness For 10.03mm；The tube body and outer diameter for the casing that nominal-ultimate strength is 80KSI are 270.1mm, wall thickness 22.8mm, name are bent The box cupling crude product that intensity is 80KSI is taken, wherein, temperature >=800 DEG C of micro-tension reducing；Modifier treatment includes the following steps：It will Steel pipe is kept the temperature after 880~910 DEG C are heated in walking beam furnace, using it is outer leaching and interior spray water cooling mode to heating after Steel pipe cooled down, pipe end increase water charging system, with it is interior spray open together；Steel pipe is heated in walking beam furnace It is kept the temperature after 680 DEG C, is then air-cooled to room temperature；It is kept the temperature after steel pipe is heated to 710 DEG C in walking beam furnace again, Ran Houkong It is cold, control straightening temperature >=450 DEG C of steel pipe；
(5) the box cupling crude product is subjected to screw thread processing, obtains casing coupling, wherein, screw thread processing includes the following steps： Degreasing, washing, table tune, phosphatization, pickling, washing, table tune, phosphatization, washing, antirust, drying and processing；Degreasing, washing, table reconciliation phosphorus Solution used in change processing is configured, and phosphatization using the water of μ S/cm of conductivity≤500, concentration≤50mg/L of chlorion The total acidity of solution used is controlled 60~70.
The dense structure of film layer is tiny after the processing of box cupling screw thread, as shown in Figure 1.
In order to better illustrate the characteristic of complex geological condition oil gas well mining casing provided in an embodiment of the present invention, press Require its yield strength of arbitrary sampling analysis, tension from casing made from embodiment 1 strong according to API 5CT (the 45th edition) standard Degree, elongation percentage, side knock work(, statistic analysis result difference are as shown in table 1.Sample number in table is of the casing taken Number, using grab sample mode.Yield strength by casing made from above method is 594~625MPa, tensile strength is The full-scale Xia Shi ballistic works >=140J of 708~742MPa, elongation percentage >=25%, 0 DEG C of transverse direction, wherein yield strength average value are 610.1MPa, standard deviation 8.7MPa, tensile strength average value is 724.1MPa, standard deviation 8.1MPa, elongation percentage average value For 29.6%, standard deviation 1.3%, the full-scale Xia Shi ballistic works average value of 0 DEG C of transverse direction is 160.5J, standard deviation 9.2J, and Sampling measures residual stress as 76MPa from casing obtained at random；Anti -collapse value is 33.01MPa, is higher by API 5CT the (the 45th Version) standard required value (21.31MPa) 54.9%.
Table 1
Inspection project Sample number Minimum value Maximum value Average value Standard deviation
Yield strength/MPa 47 594 625 610.1 8.7
Tensile strength/MPa 47 708 742 724.1 8.1
Elongation percentage/% 47 26.5 31.5 29.6 1.3
Charpy-V impact power/J 47 147 172 160.5 9.2
Embodiment 2
The preparation method of complex geological condition oil gas well mining casing, includes the following steps：
(1) it using steel scrap as raw material, is handled through 80t arc meltings, LF refining, vacuum outgas, round billet continuous casting, strand slow cooling Afterwards, continuous cast round billets are obtained, are counted using the quality of the continuous cast round billets as 100%, continuous cast round billets include the following member of mass percent Element：C：0.25%th, Si：0.22%th, Mn：0.52%th, S：0.0021%th, P：0.009%th, Cr：0.92%th, Mo：0.25%th, Al： 0.023%th, Ti：0.021%th, Ca：0.0022%th, N：0.005%th, Ni：0.03%th, Cu：0.04%, remaining is Fe and can not keep away The impurity exempted from；
(2) by continuous cast round billets after annular furnace heats, into eleven punch 11 processing, hollow billet is obtained, wherein, annular stove heat In processing, the temperature of bringing-up section is 1260~1300 DEG C, and the temperature of soaking zone is 1260~1280 DEG C, tapping temperature for 1140~ 1160 DEG C, heating time >=120min of the continuous cast round billets in stove；
(3) hollow billet is subjected to rolling process by accurate oblique milling unit, obtains hollow forging；
(4) by hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains outer diameter as 177.80mm, wall thickness For 10.36mm, nominal-ultimate strength be 110KSI casing tube body and outer diameter be 200.3mm, wall thickness 18.5mm, name bend The box cupling crude product that intensity is 110KSI is taken, wherein, temperature >=800 DEG C of micro-tension reducing；Modifier treatment includes the following steps：It will Steel pipe is kept the temperature after 880~910 DEG C are heated in walking beam furnace, using it is outer leaching and interior spray water cooling mode to heating after Steel pipe cooled down, pipe end increase water charging system, with it is interior spray open together；Steel pipe is heated in walking beam furnace It is kept the temperature after 600 DEG C, is then air-cooled to room temperature；It is kept the temperature after steel pipe is heated to 630 DEG C in walking beam furnace again, Ran Houkong It is cold, control straightening temperature >=450 DEG C of steel pipe；
(5) the box cupling crude product is subjected to screw thread processing, obtains casing coupling, wherein, screw thread processing includes the following steps： Degreasing, washing, table tune, phosphatization, pickling, washing, table tune, phosphatization, washing, antirust, drying and processing；Degreasing, washing, table reconciliation phosphorus Solution used in change processing is configured, and phosphatization using the water of μ S/cm of conductivity≤500, concentration≤50mg/L of chlorion The total acidity of solution used is controlled 60~70.
The dense structure of film layer is tiny after the processing of box cupling screw thread, as shown in Figure 2.
In order to better illustrate the characteristic of complex geological condition oil gas well mining casing provided in an embodiment of the present invention, press Require its yield strength of arbitrary sampling analysis, tension from casing made from embodiment 2 strong according to API 5CT (the 45th edition) standard Degree, elongation percentage, side knock work(, statistic analysis result difference are as shown in table 2.Sample number in table is of the casing taken Number, using grab sample mode.Yield strength by casing made from above method is 835~905MPa, tensile strength is The full-scale Xia Shi ballistic works >=110J of 918~963MPa, elongation percentage >=20%, 0 DEG C of transverse direction, wherein yield strength average value are 880.5MPa, standard deviation 8.9MPa, tensile strength average value is 923.1MPa, standard deviation 8.3MPa, elongation percentage average value For 21.6%, standard deviation 1.5%, the full-scale Xia Shi ballistic works average value of 0 DEG C of transverse direction is 125.5J, standard deviation 9.3J, and Sampling measures residual stress as 65.5MPa from casing obtained at random；Anti -collapse value is 86.50MPa, is higher by API 5CT (the 45 editions) standard required value (58.81MPa) 47.1%.
Table 2
Inspection project Sample number Minimum value Maximum value Average value Standard deviation
Yield strength/MPa 62 835 905 880.5 8.9
Tensile strength/MPa 62 918 963 923.1 8.3
Elongation percentage/% 62 19.5 23.5 21.6 1.5
Charpy-V impact power/J 62 117 132 125.5 9.3
Embodiment 3
The preparation method of complex geological condition oil gas well mining casing, includes the following steps：
(1) it using steel scrap as raw material, is handled through 80t arc meltings, LF refining, vacuum outgas, round billet continuous casting, strand slow cooling Afterwards, continuous cast round billets are obtained, are counted using the quality of the continuous cast round billets as 100%, continuous cast round billets include the following member of mass percent Element：C：0.26%th, Si：0.21%th, Mn：0.50%th, S：0.002%th, P：0.009%th, Cr：0.98%th, Mo：0.25%th, Al： 0.024%th, Ti：0.03%th, Ca：0.0021%th, N：0.006%th, Ni：0.03%th, Cu：0.04%, remaining is Fe and can not keep away The impurity exempted from；
(2) by continuous cast round billets after annular furnace heats, into eleven punch 11 processing, hollow billet is obtained, wherein, annular stove heat In processing, the temperature of bringing-up section is 1260~1300 DEG C, and the temperature of soaking zone is 1260~1280 DEG C, tapping temperature for 1140~ 1160 DEG C, heating time >=120min of the continuous cast round billets in stove；
(3) hollow billet is subjected to rolling process by accurate oblique milling unit, obtains hollow forging；
(4) by hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains outer diameter as 177.80mm, wall thickness For 9.19mm, nominal-ultimate strength be 125KSI casing tube body and outer diameter be 200.3mm, wall thickness 18.5mm, name bend The box cupling crude product that intensity is 125KSI is taken, wherein, temperature >=800 DEG C of micro-tension reducing；Modifier treatment includes the following steps：It will Steel pipe is kept the temperature after 880~910 DEG C are heated in walking beam furnace, using it is outer leaching and interior spray water cooling mode to heating after Steel pipe cooled down, pipe end increase water charging system, with it is interior spray open together；Steel pipe is heated in walking beam furnace It is kept the temperature after 560 DEG C, is then air-cooled to room temperature；It is kept the temperature after steel pipe is heated to 580 DEG C in walking beam furnace again, Ran Houkong It is cold, control straightening temperature >=450 DEG C of steel pipe；
(5) the box cupling crude product is subjected to screw thread processing, obtains casing coupling, wherein, screw thread processing includes the following steps： Degreasing, washing, table tune, phosphatization, pickling, washing, table tune, phosphatization, washing, antirust, drying and processing；Degreasing, washing, table reconciliation phosphorus Solution used in change processing is configured, and phosphatization using the water of μ S/cm of conductivity≤500, concentration≤50mg/L of chlorion The total acidity of solution used is controlled 60~70.
The dense structure of film layer is tiny after the processing of box cupling screw thread, as shown in Figure 3.
In order to better illustrate the characteristic of complex geological condition oil gas well mining casing provided in an embodiment of the present invention, press Require its yield strength of arbitrary sampling analysis, tension from casing made from embodiment 3 strong according to API 5CT (the 45th edition) standard Degree, elongation percentage, side knock work(, statistic analysis result difference are as shown in table 3.Sample number in table is of the casing taken Number, using grab sample mode.Yield strength by casing made from above method is 931~990MPa, tensile strength is The full-scale Xia Shi ballistic works >=100J of 985~1051MPa, elongation percentage >=18%, 0 DEG C of transverse direction, wherein yield strength average value are 953.1MPa, standard deviation 8.9MPa, tensile strength average value is 1015.2MPa, standard deviation 8.8MPa, elongation percentage average value For 20.5%, standard deviation 1.4%, the full-scale Xia Shi ballistic works average value of 0 DEG C of transverse direction is 120.5J, standard deviation 9.3J, and Sampling measures residual stress as 88MPa from casing obtained at random, and Anti -collapse value is 57.74MPa, is higher by API 5CT the (the 45th Version) standard required value (38.82MPa) 41.0%.
Table 3
Inspection project Sample number Minimum value Maximum value Average value Standard deviation
Yield strength/MPa 65 931 990 953.1 8.9
Tensile strength/MPa 65 985 1051 1015.2 8.8
Elongation percentage/% 65 18.5 21.8 20.5 1.4
Charpy-V impact power/J 65 101 145 120.5 9.3
It can be obtained by data above, the alloying component system of the casing provided in the embodiment of the present invention is simple, manufacture cost It is low, have excellent performance, can be widely applied to opening for the oil/gas wells of complex geological conditions such as halite layer, shale layer, perforated interval water injection well It adopts, has a vast market prospect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention Any modification, equivalent replacement or improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of complex geological condition oil gas well mining casing, it is characterised in that：Described sleeve pipe includes tube body and box cupling, with institute The tube body quality for stating casing is 100% meter, and the tube body includes the following chemical element component of mass percent：0.24%≤C ≤ 0.28%, 0.15%≤Si≤0.35%, 0.40%≤Mn≤0.55%, S≤0.003%, P≤0.012%, 0.02%≤ Al≤0.04%, 0.90%≤Cr≤1.10%, 0.10%≤Mo≤0.30%, 0.01%≤Ti≤0.04%, 0.002%≤ Ca≤0.004%, remaining is Fe and inevitable impurity；It is counted using the box cupling quality of described sleeve pipe as 100%, the box cupling packet Include the following chemical element component of mass percent：0.24%≤C≤0.28%, 0.15%≤Si≤0.35%, 0.40%≤ Mn≤0.55%, S≤0.003%, P≤0.012%, 0.02%≤Al≤0.04%, 0.90%≤Cr≤1.10%, 0.10% ≤ Mo≤0.30%, 0.01%≤Ti≤0.04%, 0.002%≤Ca≤0.004%, remaining for Fe and inevitably it is miscellaneous Matter.
2. complex geological condition oil gas well mining casing as described in claim 1, it is characterised in that：The outer diameter of described sleeve pipe Ovality≤0.5%D, eccentricity≤10%t, wherein, the nominal wall thickness that D is the nominal diameter of casing, t is casing.
3. complex geological condition oil gas well mining casing as described in claim 1, it is characterised in that：The tube body remnants should Power≤100MPa.
4. such as the preparation method of claim 1-3 any one of them complex geological condition oil gas well mining casings, feature It is：Include the following steps：
Described sleeve pipe includes tube body and box cupling, wherein,
The preparation method of the tube body includes the following steps：
Continuous cast round billets are provided, by the continuous cast round billets after annular furnace heats, into eleven punch 11 processing, obtain hollow billet；
The hollow billet is subjected to rolling process, obtains hollow forging；
By the hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains the tube body of casing；And/or
The preparation method of the box cupling includes the following steps：
Continuous cast round billets are provided, by the continuous cast round billets after annular furnace heats, into eleven punch 11 processing, obtain hollow billet；
The hollow billet is subjected to rolling process, obtains hollow forging；
By the hollow forging after micro-tension reducing, modifier treatment, screw thread process is carried out, obtains the box cupling crude product of casing；
The box cupling crude product is subjected to screw thread processing, obtains casing coupling.
5. the preparation method of complex geological condition oil gas well mining casing as claimed in claim 4, it is characterised in that：It is described Continuous cast round billets are obtained using steel scrap as raw material after arc melting, LF refining, vacuum outgas, round billet continuous casting, strand slow cooling processing It arrives.
6. the preparation method of complex geological condition oil gas well mining casing as claimed in claim 4, it is characterised in that：It is described In annular furnace heat treatment, the temperature of bringing-up section is 1260~1300 DEG C, and the temperature of soaking zone is 1260~1280 DEG C, pipe Tapping temperature is 1140~1160 DEG C；And/or
Temperature >=800 DEG C of the micro-tension reducing.
7. the preparation method of complex geological condition oil gas well mining casing as claimed in claim 6, it is characterised in that：It is described In annular furnace heat treatment, heating time of the continuous cast round billets in stove is >=120min.
8. the preparation method of complex geological condition oil gas well mining casing as claimed in claim 4, it is characterised in that：It is described Hardening and tempering method is as follows：It is kept the temperature after the hollow forging handled through micro-tension reducing is heated to 880~910 DEG C, using cooling by water； It keeps the temperature after steel pipe is heated to 550~720 DEG C, is cooled to room temperature using air-cooled；It is protected after steel pipe is heated to 570~720 DEG C again Temperature using air-cooled cooling, makes straightening temperature >=450 DEG C of steel pipe, wherein, the cooling by water is using the outer water cooling drenched with interior spray Mode cools down the steel pipe after heating, and pipe end increases water charging system, is opened together with interior spray.
9. the preparation method of complex geological condition oil gas well mining casing as claimed in claim 4, it is characterised in that：It is described Screw thread processing includes the following steps：Degreasing, washing, table tune, phosphatization, pickling, washing, table tune, phosphatization, washing, antirust, at drying Reason.
10. the preparation method of complex geological condition oil gas well mining casing as claimed in claim 9, it is characterised in that：Institute State degreasing, washing, table reconcile solution used in phosphorating treatment using μ S/cm of conductivity≤500, concentration≤50mg/L of chlorion Water be configured, and solution used in phosphatization total acidity control 60~70.
CN201711492421.0A 2017-12-30 2017-12-30 A kind of complex geological condition oil gas well mining casing and preparation method thereof Pending CN108265231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711492421.0A CN108265231A (en) 2017-12-30 2017-12-30 A kind of complex geological condition oil gas well mining casing and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711492421.0A CN108265231A (en) 2017-12-30 2017-12-30 A kind of complex geological condition oil gas well mining casing and preparation method thereof

Publications (1)

Publication Number Publication Date
CN108265231A true CN108265231A (en) 2018-07-10

Family

ID=62772948

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711492421.0A Pending CN108265231A (en) 2017-12-30 2017-12-30 A kind of complex geological condition oil gas well mining casing and preparation method thereof

Country Status (1)

Country Link
CN (1) CN108265231A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418421A (en) * 2008-12-09 2009-04-29 山东墨龙石油机械股份有限公司 High intensity oil casing tube for resisting sulfurated hydrogen corrosion and method for producing the same
CN104057253A (en) * 2014-06-16 2014-09-24 攀钢集团成都钢钒有限公司 High-strength oil-string casing for shale gas and manufacturing method thereof
CN106086645A (en) * 2016-06-29 2016-11-09 达力普石油专用管有限公司 Hydrogen sulfide corrosion resistant tubing and casing and manufacture method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418421A (en) * 2008-12-09 2009-04-29 山东墨龙石油机械股份有限公司 High intensity oil casing tube for resisting sulfurated hydrogen corrosion and method for producing the same
CN104057253A (en) * 2014-06-16 2014-09-24 攀钢集团成都钢钒有限公司 High-strength oil-string casing for shale gas and manufacturing method thereof
CN106086645A (en) * 2016-06-29 2016-11-09 达力普石油专用管有限公司 Hydrogen sulfide corrosion resistant tubing and casing and manufacture method thereof

Similar Documents

Publication Publication Date Title
CN109913757B (en) Corrosion-resistant and high-extrusion-resistance petroleum casing pipe and preparation method thereof
JP5252131B2 (en) Hardening method of steel pipe
CN103276297B (en) A kind of self-joining type high strength cord is cored the manufacture method of drilling rod weldless steel tube
CN101285151B (en) Petroleum case pipe with high strength and toughness and producing method thereof
CN103028912B (en) Steel forging manufacturing method for valve seat of deep-sea oil production equipment
CN103131947B (en) High-performance low-carbon microalloy steel SEW (hot stretch-reducing electric welding) expansion casing and manufacturing method thereof
CN102605235B (en) High-collapse resistance hot stretch-reducing electric welding (SEW) petroleum casing pipe and manufacturing method thereof
CN109023120B (en) High-strength and high-toughness welded casing for shale gas well and manufacturing method thereof
CN109055862B (en) High-strength and high-toughness casing pipe for shale gas well and manufacturing method thereof
CN106011638B (en) A kind of thick oil thermal extraction expansion sleeve and its manufacture method
CN101942550B (en) Heat treatment process for hollow drill collar
CN101608282A (en) Anti--40 ℃～-60 ℃ low temperature drill rod material steel pipes and manufacture method thereof
CN101921963A (en) JLG105 steel stage oil drillpipe and production process thereof
CN104097035A (en) Multi-pass thickening molding integrated heavy weight drill pipe manufacturing method
CN108998650B (en) Method for manufacturing large-caliber thick-wall seamless steel pipe of 630 ℃ ultra-supercritical unit G115
CN100408905C (en) Manufacturing method of seamless steel pipe for pressure pipeline
CN104831175B (en) A kind of J55 grade of steels SEW expansion sleeves and its manufacture method
CN108265231A (en) A kind of complex geological condition oil gas well mining casing and preparation method thereof
CN103266216B (en) Strength mismatching heat treatment process for quenched and tempered petroleum steel pipe
CN102189189B (en) High-precision thermal expanding method for high-strength steel pipes
CN106319367B (en) SAGD methods the heavy crude producing tough petroleum casing pipes of 125ksi high and its manufacturing method
CN110303067B (en) High-strength and high-toughness titanium alloy oil well pipe and manufacturing method thereof
CN107419168A (en) The X70 level pipeline seamless steel pipes and its production method of super-large diameter
CN102430901A (en) P110 steel level high frequency straight welded pipe manufacturing method
CN103071679A (en) One-step forming technology of hollow anchor rod

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20180710

RJ01 Rejection of invention patent application after publication