CN112626317A - Processing technology of threaded joint of marine drilling riser - Google Patents
Processing technology of threaded joint of marine drilling riser Download PDFInfo
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- CN112626317A CN112626317A CN202011495343.1A CN202011495343A CN112626317A CN 112626317 A CN112626317 A CN 112626317A CN 202011495343 A CN202011495343 A CN 202011495343A CN 112626317 A CN112626317 A CN 112626317A
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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- 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
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
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- 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)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention discloses a processing technology of a marine drilling riser threaded joint, which comprises the following steps: the method comprises the following steps of material feeding, normalizing treatment, rough machining, quenching and tempering, finish machining, phosphorization, final inspection and warehousing, wherein the joint is placed in a bell-type furnace for heating treatment before rough machining, and the joint is subjected to heat treatment of high-temperature quenching and low-temperature tempering before finish machining, wherein the phosphorization comprises the following steps of degreasing, rust removal, surface adjustment, high-temperature phosphorization, drying and oil coating, and the joint is placed in a phosphate solution at 90-98 ℃ for heating and phosphorization treatment to generate a layer of compact crystals on the surface of the joint, and the method has the beneficial effects that: the process is simple, the operation is easy, the corrosion resistance and the wear resistance of the threaded joint of the marine drilling riser pipe can be improved, and the service life and the use safety of the threaded joint of the marine riser pipe are improved.
Description
Technical Field
The invention relates to the technical field of marine drilling, in particular to a processing technology of a threaded joint of a marine drilling riser pipe.
Background
The riser is a tubular structure essential for marine oil and gas exploitation, and is essentially a conduit structure for connecting a floating body on the surface of the sea and a wellhead on the seabed. The riser system serves a variety of functions during the drilling and production stages, including isolating seawater, providing access for drilling fluids to and from, supporting auxiliary lines, guiding the drilling tool, lowering and withdrawing wellhead blowout preventer stacks, and the like. With the development of deepwater oil and gas resources, deepwater marine risers are more and more widely applied. In deep water drilling, the stress state of the marine riser is worse and more complex along with the increase of the water depth, and the marine riser is influenced by wind, waves, currents and the like for a long time, meanwhile, a drill rod column rotates in the marine riser at a certain rotating speed and can be contacted, rubbed and abraded with all channels through which the drill rod column passes, the marine petroleum industry generates too many marine riser abrasion accidents, the marine drilling operation safety is seriously threatened, and great economic and environmental losses are brought.
The existing marine drilling water-resisting method has the following problems: (1) the marine riser is poor in corrosion resistance, and needs strong corrosion resistance due to the fact that the marine riser is corroded by seawater for a long time; (2) the marine riser can be in contact with, rub and wear with the channel in the using process, so that the mechanical structure of the marine riser is changed, the marine riser wear accident is caused, the marine drilling operation safety is seriously threatened, and great economic and environmental losses are brought.
Disclosure of Invention
Aiming at the defects, the invention provides the processing technology of the marine drilling riser threaded joint, which is simple in process and easy to operate, can improve the corrosion resistance and the wear resistance of the marine drilling riser threaded joint, and can prolong the service life and improve the use safety of the marine drilling riser threaded joint.
The invention is realized by the following technical scheme: a processing technology of a threaded joint of a marine drilling riser pipe is characterized by comprising the following steps: the method comprises the following steps:
s1, material receiving: before processing, the appearance of the joint is detected, and the joint is visually inspected to determine whether serious defects exist;
s2, normalizing treatment: placing the joint in a bell-type furnace for heating treatment to enable the bell-type furnace to reach 900 +/-10 ℃, then carrying out heat preservation treatment for 180 hours at 120 plus or minus, moving the joint out of the bell-type furnace after reaching the heat preservation time, and cooling the joint to room temperature in the air;
s3: rough machining: cutting and polishing the joint subjected to normalizing treatment by using a numerical control machine tool, and removing excess materials on the raw materials to preliminarily form the shape and size of the joint;
s4, hardening and tempering: placing the joint after rough machining in a bell-type furnace for quenching treatment to enable the bell-type furnace to reach 880 +/-10 ℃, then carrying out heat preservation treatment for 180-plus-one time for 240 hours, after reaching the heat preservation time, moving the joint out of the bell-type furnace, placing the joint in cooling water for cooling, placing the cooled joint in the bell-type furnace again for reheating, carrying out tempering treatment, after heating to 600-plus-one time for 620 ℃, carrying out heat preservation treatment for 210-plus-one time for 270 hours, after reaching the heat preservation time, moving the joint out of the bell-type furnace, and cooling to room temperature in air;
s5, finishing: placing the hardened and tempered joint on a numerical control machine tool for further processing, and processing the joint to a specified size;
s6, phosphorization: the method comprises the following steps:
s6-1, putting the finished joint into degreasing liquid for degreasing, and then washing the residual degreasing liquid on the joint with clear water, wherein the ratio of the degreasing liquid is 25kg:5kg:8kg = hot water: soap powder: mixed liquid of the liquid detergent;
s6-2, putting the degreased joint into an acidizing fluid for derusting treatment, and flushing residual acidizing fluid on the joint with clear water, wherein the acidizing fluid is 100% pure carbon steel pickling passivation solution;
s6-3: and putting the degreased joint into surface conditioning liquid for surface conditioning treatment, wherein the surface conditioning liquid is prepared from the following components in a ratio of 1000L:6kg = water: TL-003 manganese series surface modifier special for phosphating;
s6-4: putting the joint with the regulated surface into a phosphating solution with the temperature of 90-98 ℃ for phosphating for 15-20min, and then flushing residual phosphating solution on the joint with clear water, wherein the phosphating solution is a 14% coating solution;
s6-5: drying the phosphatized joint, and then coating or dipping lubricating oil type rust removing oil on the joint;
and S7, inspecting the phosphatized joint, and warehousing after the inspection is finished.
In a preferred embodiment of the present invention, the start temperature of the hood furnace in step S2 or S4 is less than 350 ℃.
In a preferred embodiment of the present invention, in step S4, the cooling water has a starting water temperature of not higher than 38 ℃ and a post-quenching water temperature of higher than 49 ℃.
As a preferred technical scheme of the invention, the clean water in the steps S5-1 to S5-4 is tap water with the pH value of 6-8.
Compared with the prior art, the invention has the beneficial effects that:
(1) the marine riser joint is formed by processing high-strength pipeline steel, normalizing treatment is added before rough machining, crystal grains of joint materials can be refined, stress can be eliminated, and a balanced structure is obtained, so that comprehensive mechanical properties and cutting properties are changed;
(2) the joint is placed in a phosphate solution to be heated for phosphating treatment, so that a layer of compact crystals are generated on the surface of the joint, a good corrosion prevention effect is achieved, the phosphorization crystal grains are quickly crystallized at the temperature of 90-98 ℃, the ion adhesive force is strong, the thickness value of a formed phosphorization surface film is large, the phosphorization crystal grains are densely arranged, the crystals are uniform, the pores among the crystal grains are small, the antirust capacity and the abrasion resistance of the joint are greatly improved, the tooth sticking phenomenon generated when the drill collar threaded joint is meshed is effectively reduced, the abrasion resistance of threads is improved, and the surface attractiveness of the joint is improved;
(3) the process is simple, the operation is easy, the corrosion resistance and the wear resistance of the threaded joint of the marine drilling riser pipe can be improved, and the service life and the use safety of the threaded joint of the marine riser pipe are improved.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic diagram of the process flow for phosphating in the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The processing technology of the marine drilling riser threaded joint shown in the figures 1-2 comprises the following steps:
s1 materials assigned: before processing, the appearance of the joint is detected, and the joint is visually inspected to determine whether serious defects exist;
s2, normalizing treatment: placing the joint in a bell-type furnace for heating treatment, wherein the initial temperature of the bell-type furnace is less than 350 ℃, so that the bell-type furnace reaches 900 +/-10 ℃, then carrying out heat preservation treatment for 180 hours, removing the joint out of the bell-type furnace after reaching the heat preservation time, cooling the joint to room temperature in the air, and carrying out normalizing treatment to refine grains and eliminate stress so as to obtain a tissue in a balanced state so as to change the comprehensive mechanical property and the cutting property;
s3, rough machining: cutting and polishing the joint subjected to normalizing treatment by using a numerical control machine tool, and removing excess materials on the raw materials to preliminarily form the shape and size of the joint;
s4, hardening and tempering: and placing the joint after rough machining in a bell-type furnace for quenching treatment, wherein the initial temperature of the bell-type furnace is less than 350 ℃, so that the bell-type furnace reaches 880 +/-10 ℃, then carrying out heat preservation treatment for 240 hours after 180-year heat preservation time is reached, removing the joint out of the bell-type furnace, placing the joint in cooling water for cooling, placing the cooled joint in the bell-type furnace again for reheating, and carrying out tempering treatment. Wherein the initial water temperature of the cooling water is not higher than 38 ℃, the water temperature of the cooling water after quenching is higher than 49 ℃, after heating to 600-;
the heat treatment mode of high-temperature quenching and low-temperature tempering is adopted, so that the performance of the steel can be effectively adjusted, the better strength, plasticity and toughness of the steel can be obtained, and the good comprehensive mechanical property can be achieved;
s5, finishing: placing the hardened and tempered joint on a numerical control machine tool for further processing, and processing the joint to a specified size;
s6, degreasing: putting the finished joint into degreasing liquid for degreasing treatment, wherein the ratio of the degreasing liquid is 25kg:5kg:8kg = hot water: soap powder: degreasing the mixed liquid of the detergent, namely removing oil stains on the surface of the joint and cutting fluid brought by the processing of a preorder machine, preparing for subsequent acid washing and phosphating, flushing the surface of the joint by using degreasing fluid until the surface of the joint is oilless, and flushing residual degreasing fluid on the joint by using clear water;
s7, rust removal: putting the degreased joint into an acidizing fluid for derusting treatment, wherein the acidizing fluid is a 100% pure carbon steel pickling passivation solution, removing rust on the surface of the joint, activating the surface of the joint, and flushing residual acidizing fluid on the joint by using clear water;
s8: surface conditioning: and putting the degreased joint into surface conditioning liquid for surface conditioning treatment, wherein the surface conditioning liquid is prepared from the following components in a ratio of 1000L:6kg = water: the TL-003 manganese series special surface conditioning agent for phosphating overcomes the phenomenon that a phosphating film is thickened due to the coarsening effect of alkali and acid on a workpiece in the degreasing and derusting processes, and can increase the activity of a metal surface and accelerate the phosphating speed;
s9: high-temperature phosphating: putting the joint with the regulated surface into phosphating solution with the temperature of 90-98 ℃ for phosphating for 15-20min to generate a layer of insoluble phosphate protective film on the surface of the joint, so that the friction reduction and lubricity of the joint during screwing can be improved, the corrosion resistance of the joint is improved, and then flushing residual phosphating solution on the joint by using clean water, wherein the phosphating solution is 14% of coating solution;
s10: drying and oiling: after the phosphated joint is dried, the moisture on the surface of the joint is removed, the adhesion of rust preventive oil is improved, the corrosion resistance of the joint is enhanced, the joint is coated or impregnated with lubricating oil type rust preventive oil, the pores among phosphated film crystals on the surface of the joint are sealed, the corrosion of water vapor, salt mist, acid mist and the like to metal is resisted, the corrosion resistance of the joint is enhanced, the lubricity during thread screwing is improved, and the friction of a joint surface is reduced;
and S11, inspecting the phosphatized joint, and warehousing after the inspection is finished.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A processing technology of a threaded joint of a marine drilling riser pipe is characterized by comprising the following steps: the method comprises the following steps:
s1, material receiving: before processing, the appearance of the joint is detected, and the joint is visually inspected to determine whether serious defects exist;
s2, normalizing treatment: placing the joint in a bell-type furnace for heating treatment to enable the bell-type furnace to reach 900 +/-10 ℃, then carrying out heat preservation treatment for 180 hours at 120 plus or minus, moving the joint out of the bell-type furnace after reaching the heat preservation time, and cooling the joint to room temperature in the air;
s3: rough machining: cutting and polishing the joint subjected to normalizing treatment by using a numerical control machine tool, and removing excess materials on the raw materials to preliminarily form the shape and size of the joint;
s4, hardening and tempering: placing the joint after rough machining in a bell-type furnace for quenching treatment to enable the bell-type furnace to reach 880 +/-10 ℃, then carrying out heat preservation treatment for 180-plus-one time for 240 hours, after reaching the heat preservation time, moving the joint out of the bell-type furnace, placing the joint in cooling water for cooling, placing the cooled joint in the bell-type furnace again for reheating, carrying out tempering treatment, after heating to 600-plus-one time for 620 ℃, carrying out heat preservation treatment for 210-plus-one time for 270 hours, after reaching the heat preservation time, moving the joint out of the bell-type furnace, and cooling to room temperature in air;
s5, finishing: placing the hardened and tempered joint on a numerical control machine tool for further processing, and processing the joint to a specified size;
s6, phosphorization: the method comprises the following steps:
s6-1, putting the finished joint into degreasing liquid for degreasing, and then washing the residual degreasing liquid on the joint with clear water, wherein the ratio of the degreasing liquid is 25kg:5kg:8kg = hot water: soap powder: mixed liquid of the liquid detergent;
s6-2, putting the degreased joint into an acidizing fluid for derusting treatment, and flushing residual acidizing fluid on the joint with clear water, wherein the acidizing fluid is 100% pure carbon steel pickling passivation solution;
s6-3: and putting the degreased joint into surface conditioning liquid for surface conditioning treatment, wherein the surface conditioning liquid is prepared from the following components in a ratio of 1000L:6kg = water: TL-003 manganese series surface modifier special for phosphating;
s6-4: putting the joint with the regulated surface into a phosphating solution with the temperature of 90-98 ℃ for phosphating for 15-20min, and then flushing residual phosphating solution on the joint with clear water, wherein the phosphating solution is a 14% coating solution;
s6-5: drying the phosphatized joint, and then coating or dipping lubricating oil type rust removing oil on the joint;
and S7, inspecting the phosphatized joint, and warehousing after the inspection is finished.
2. The process for machining the threaded joint of the marine drilling riser pipe according to claim 1, wherein the process comprises the following steps: the initial temperature of the bell type furnace in the step S2 or S4 is less than 350 ℃.
3. The process for machining the threaded joint of the marine drilling riser pipe according to claim 1, wherein the process comprises the following steps: in the step S4, the initial water temperature of the cooling water is not higher than 38 ℃, and the water temperature of the cooling water after quenching is higher than 49 ℃.
4. The process for machining the threaded joint of the marine drilling riser pipe according to claim 1, wherein the process comprises the following steps: the clear water in the steps S5-1 to S5-4 is tap water with the pH value of 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011495343.1A CN112626317A (en) | 2020-12-17 | 2020-12-17 | Processing technology of threaded joint of marine drilling riser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011495343.1A CN112626317A (en) | 2020-12-17 | 2020-12-17 | Processing technology of threaded joint of marine drilling riser |
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| CN112626317A true CN112626317A (en) | 2021-04-09 |
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| CN202011495343.1A Pending CN112626317A (en) | 2020-12-17 | 2020-12-17 | Processing technology of threaded joint of marine drilling riser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695842A (en) * | 2021-07-26 | 2021-11-26 | 建湖县益铭液压机械有限公司 | Process method capable of effectively reducing deformation of pipe joint parts |
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| CN101319321A (en) * | 2008-07-14 | 2008-12-10 | 江苏曙光华阳钻具有限公司 | High-temperature phosphating process for threaded joint of petroleum drill collar |
| CN103452491A (en) * | 2013-09-17 | 2013-12-18 | 刘岩 | Production process of drilling tubing and casing for oilfields |
| CN110669918A (en) * | 2019-10-16 | 2020-01-10 | 安庆锦泰金属材料科技有限公司 | Heat treatment quenching process for high-toughness steel strip |
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2020
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Patent Citations (4)
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| RU2291227C1 (en) * | 2005-06-22 | 2007-01-10 | Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" | Construction-steel parts surface hardening method |
| CN101319321A (en) * | 2008-07-14 | 2008-12-10 | 江苏曙光华阳钻具有限公司 | High-temperature phosphating process for threaded joint of petroleum drill collar |
| CN103452491A (en) * | 2013-09-17 | 2013-12-18 | 刘岩 | Production process of drilling tubing and casing for oilfields |
| CN110669918A (en) * | 2019-10-16 | 2020-01-10 | 安庆锦泰金属材料科技有限公司 | Heat treatment quenching process for high-toughness steel strip |
Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113695842A (en) * | 2021-07-26 | 2021-11-26 | 建湖县益铭液压机械有限公司 | Process method capable of effectively reducing deformation of pipe joint parts |
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