WO2014084754A1 - High-pressure pump plunger - Google Patents
High-pressure pump plunger Download PDFInfo
- Publication number
- WO2014084754A1 WO2014084754A1 PCT/RU2012/001124 RU2012001124W WO2014084754A1 WO 2014084754 A1 WO2014084754 A1 WO 2014084754A1 RU 2012001124 W RU2012001124 W RU 2012001124W WO 2014084754 A1 WO2014084754 A1 WO 2014084754A1
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- WO
- WIPO (PCT)
- Prior art keywords
- coating
- plunger
- spraying
- working surface
- chamfers
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0403—Refractory metals, e.g. V, W
- F05C2201/0406—Chromium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0403—Refractory metals, e.g. V, W
- F05C2201/0409—Molybdenum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0466—Nickel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
- F05C2203/0804—Non-oxide ceramics
- F05C2203/0813—Carbides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2203/00—Non-metallic inorganic materials
- F05C2203/08—Ceramics; Oxides
- F05C2203/0804—Non-oxide ceramics
- F05C2203/0813—Carbides
- F05C2203/0826—Carbides of wolfram, e.g. tungsten carbide
Definitions
- the device is intended for use in the field of oilfield equipment in the design, manufacture, use and repair of high pressure plunger pumps.
- a high service life of the pump plungers is achieved by applying wear-resistant corrosion-resistant metal-ceramic, ceramic coatings with a low friction coefficient to the surface of the plunger, as well as alloy coatings by high-speed spraying.
- coatings applied to devices that are used in field services and, in particular, in oil and gas wells must be highly resistant to diffusion of formation gases and liquids.
- Such coatings can be nanostructured, functionally gradient coatings, providing higher wear resistance and continuity, as well as adhesion to the substrate and cohesion of the coating.
- a high-pressure plunger is known from the prior art for injecting a solution for cementing oil or gas wells, made in the form of a cylinder made of structural steel, while the outer side surface of the cylinder is made with a polished chrome coating (RF Patent 73408, 2008).
- This coating is, firstly, expensive, and secondly, allowing corrosion of the base material of the plunger due to the possibility of penetration of fluid through the pores of the chrome coating.
- the chrome coating as a rule, is applied with a very thin layer (coating thickness is 0.1 mm), which during operation of the plunger leads to mechanical damage and, as a consequence, the plunger breaks down.
- the problem to which the claimed solution is directed is to increase the guaranteed life of the plunger by forming a nanostructured functional-gradient coating layer on its surface with high adhesive and cohesive characteristics and low porosity, which provides reliable long-term protection of the plunger working surface from corrosion and abrasive abrasion in severe conditions.
- the working surface of the rod is made with an annular wedge-shaped bore with the formation of a section for spraying with a depth of 0.02 to 2 mm, on which by means of gas-thermal, mainly high-speed flame spraying, a coating is applied based on one of the following materials: WC / CoCr with a nanostructured component, WC / Ni with a nanostructured component, Cr 3 C 2 / NiCr with a nanostructured component, WC / Cr 3 C2 / Ni with a nanostructured component, while the spraying area is the entire length of the working surface except for areas adjacent to the entrance chamfers, each of which is no more than 5 mm in length.
- Thermal spraying methods allow the formation of a thin layer of protective coating with high adhesion to the base material and low porosity.
- the method of high-speed flame spraying allows coating at low temperature without reflow, which eliminates the introduction of internal stresses into the plunger body.
- the relatively low temperature of the gas stream and the absence of free oxygen provides a low oxide content in the coating, which contributes to an increase in its corrosion resistance.
- cermet materials such as tungsten carbide on a cobalt-chromium bond (WC / CoCr), tungsten carbide on a nickel bond (WC / Ni), chromium carbide on a nickel-chromium bond (CgSg / NiCr) or a mixture of tungsten carbide and nickel-bonded chromium carbide (WC / Cr 3 C 2 / Ni) in combination with a high-speed method of spraying them allows to obtain a coating characterized by high hardness, adhesion, corrosion resistance at a thickness not exceeding hundreds of microns. The through porosity of such a coating is absent, and the total porosity does not exceed a percent.
- nansotructured component into the coating allows one to obtain a coating that provides higher wear resistance and continuity, as well as adhesion to the substrate and cohesion of the coating.
- Coating the treated area for spraying which is the entire length of the working surface of the plunger with the exception of areas adjacent to the entrance chamfers, the size of each of which is no more than 5 mm in length, can protect almost the entire surface of the plunger, eliminating the formation of chips after coating its application during its subsequent grinding, as well as during operation of the plunger.
- the drawing shows a General view of the plunger of the high pressure pump of an oil field installation.
- the plunger in the form of a cylinder 1 is made of structural or low carbon steel.
- a layer of nanostructured, functionally gradient coating 2 is deposited on the outer surface of cylinder 1.
- Layer 2 is applied by high-speed flame spraying of a cermet powder material selected from the following: WC / CoCr with a nanostructured component, WC / Ni with a nanostructured component, Cr3C2 / NiCr with a nanostructured component, WC / Cr3C2 / Ni with a nanostructured component.
- the coating is applied to the entire outer surface of the plunger with the exception of sections 3 adjacent to its ends, the size of each of which is not more than 5 mm along the length of the plunger.
- the protective layer 2 protects its outer surface from corrosion resulting from interaction with an aggressive environment.
- this protective layer having high hardness and adhesive characteristics, protects the outer surface of the plunger from abrasion in difficult conditions of borehole drilling or well operation.
- Implementation example 1 A nanostructured, functionally gradient coating based on tungsten carbide powder on a cobalt-chromium bond 250 ⁇ m thick was applied to the outer surface of the plunger by high-speed flame spraying. Each particle of the sprayed powder contains tungsten carbide particles dispersed in a binder material (CoCg).
- the coating is applied to the surface of the plunger, bored to a depth of 0.25 mm, with the exception of sections adjacent to the inlet chamfers, comprising 3 mm along the length of the plunger from each chamfer.
- the coating porosity was ⁇ 1%, adhesion -> 80 MPa.
- the hardness of the coating is 1150 HV0.3.
- the applied coating allows to increase the plunger resource when working in conditions of hydroabrasive wear by 4 times compared to nitriding and 4-6 times compared to galvanic chrome plating.
- Implementation example 2 A nanostructured, functionally gradient coating based on chromium carbide powder on a nickel-chromium binder 200 ⁇ m thick was applied to the outer surface of the plunger by high-speed flame spraying.
- the coating is applied to the surface of the plunger, bored to a depth of 0.2 mm, with the exception of sections adjacent to the input chamfers, which are 2 mm along the length of the plunger from each chamfer.
- the porosity of the coating was ⁇ 1%, adhesion -> 80 MPa.
- the hardness of the coating is 900 HV0.3.
- the applied coating allows to increase the plunger resource by 2–3 times as compared with nitriding and 4 times as compared with galvanic chrome plating.
- the proposed coating protects the outer surface of the plunger housing from corrosion when operating in a very aggressive environment, has high hardness, elasticity, coating density (99.5%), well resists abrasion and cracking, and also provides adhesion to the substrate and cohesion of the coating.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
ПЛУНЖЕР НАСОСА ВЫСОКОГО ДАВЛЕНИЯ HIGH PRESSURE PUMP PLUNGER
Устройство предназначено для использования в области нефтепромыслового оборудования при проектировании, изготовлении, использовании и ремонте плунжерных насосов высокого давления. The device is intended for use in the field of oilfield equipment in the design, manufacture, use and repair of high pressure plunger pumps.
В нефтяной промышленности для глубинной добычи нефти широко применяются скважинные штанговые насосы. От надёжности этих насосов в значительной степени зависит экономическая эффективность нефтедобывающих предприятий. Поэтому повышение надёжности скважинных штанговых насосов является актуальной задачей для снижения себестоимости нефти. In the oil industry, well sucker-rod pumps are widely used for deep oil production. On the reliability of these pumps to a large extent depends on the economic efficiency of oil companies. Therefore, improving the reliability of borehole sucker rod pumps is an urgent task to reduce the cost of oil.
Высокий ресурс работы плунжеров насоса достигается за счёт нанесения на поверхность плунжера износостойких коррозионно-стойких металлокерамических, керамических покрытий с низким коэффициентом трения, а также покрытий из сплавов методом высокоскоростного напыления. A high service life of the pump plungers is achieved by applying wear-resistant corrosion-resistant metal-ceramic, ceramic coatings with a low friction coefficient to the surface of the plunger, as well as alloy coatings by high-speed spraying.
Среди наиболее распространённых методов упрочнения поверхности плунжера насоса высокого давления являются цементация поверхности, азотирование поверхности, гальваническое хромирование, нанесение покрытия на основе самофлюсующихся сплавов методами газотермического напыления с последующим оплавлением. Among the most common methods for hardening the surface of a plunger of a high-pressure pump are surface cementation, surface nitriding, galvanic chrome plating, self-fluxing alloy coating using gas thermal spraying followed by reflow.
Указанные методы не обеспечивают регулирование твёрдости по толщине, не обеспечивают достаточную износостойкость, не решается задача обеспечения низкой пористости. These methods do not provide control of hardness by thickness, do not provide sufficient wear resistance, the problem of ensuring low porosity is not solved.
Кроме того, покрытия, наносимые на устройства, которые используются в промысловых службах и, в частности, в нефтегазовых скважинах, должны обладать высокой устойчивостью к диффузии пластовых газов и жидкостей. In addition, coatings applied to devices that are used in field services and, in particular, in oil and gas wells, must be highly resistant to diffusion of formation gases and liquids.
Такими покрытиями могут являться наноструктурированные, функционально-градиентные покрытия, обеспечивающие более высокую износостойкость и сплошность, а также адгезию с подложкой и когезию покрытия. Such coatings can be nanostructured, functionally gradient coatings, providing higher wear resistance and continuity, as well as adhesion to the substrate and cohesion of the coating.
Из уровня техники известен плунжер высокого давления, предназначенный для закачки раствора для цементирования нефтяных или газовых скважин, выполненный в виде цилиндра из конструкционной стали, при этом наружная боковая поверхность цилиндра выполнена с хромовым отполированным покрытием (Патент РФ 73408, 2008 г.). A high-pressure plunger is known from the prior art for injecting a solution for cementing oil or gas wells, made in the form of a cylinder made of structural steel, while the outer side surface of the cylinder is made with a polished chrome coating (RF Patent 73408, 2008).
Данное покрытие является, во-первых, дорогим, а во-вторых, допускающим коррозию базового материала плунжера ввиду возможности проникновения жидкости через поры хромового покрытия. Кроме того, хромовое покрытие, как правило, наносится очень тонким слоем (толщина покрытия составляет 0,1 мм), что при эксплуатации плунжера приводит к его механическому повреждению и, как следствие, выходу плунжера из строя. This coating is, firstly, expensive, and secondly, allowing corrosion of the base material of the plunger due to the possibility of penetration of fluid through the pores of the chrome coating. In addition, the chrome coating, as a rule, is applied with a very thin layer (coating thickness is 0.1 mm), which during operation of the plunger leads to mechanical damage and, as a consequence, the plunger breaks down.
Задачей, на решение которой направлено заявленное решение, является повышение гарантированного ресурса эксплуатации плунжера, за счет формирования на его поверхности наноструктурированного функционально-градиентного слоя покрытия, обладающего высокими адгезионными и когезионными характеристиками и низкой пористостью, обеспечивает надежную долговременную защиту рабочей поверхности плунжера от коррозии и абразивного истирания в тяжелых условиях эксплуатации. The problem to which the claimed solution is directed is to increase the guaranteed life of the plunger by forming a nanostructured functional-gradient coating layer on its surface with high adhesive and cohesive characteristics and low porosity, which provides reliable long-term protection of the plunger working surface from corrosion and abrasive abrasion in severe conditions.
Задача решается тем, что в плунжере насоса высокого давления, выполненном в виде стержня из конструкционной стали с цилиндрической рабочей поверхностью и заходными фасками, рабочая поверхность стержня выполнена с кольцевой клиновидной расточкой с образованием участка под напыление глубиной от 0,02 до 2 мм, на который посредством газотермического, преимущественно высокоскоростного газопламенного напыления, нанесено покрытие на основе одного из следующих материалов: WC/CoCr с наноструктурированной составляющей, WC/Ni с наноструктурированной составляющей, Cr3C2/NiCr с наноструктурированной составляющей, WC/Cr3C2/Ni с наноструктурированной составляющей, при этом участок под напыление составляет всю длину рабочей поверхности за исключением участков, прилегающих к заходным фаскам, величина каждого из которых по длине составляет не более 5 мм. The problem is solved in that in the plunger of the high-pressure pump, made in the form of a rod made of structural steel with a cylindrical working surface and entry chamfers, the working surface of the rod is made with an annular wedge-shaped bore with the formation of a section for spraying with a depth of 0.02 to 2 mm, on which by means of gas-thermal, mainly high-speed flame spraying, a coating is applied based on one of the following materials: WC / CoCr with a nanostructured component, WC / Ni with a nanostructured component, Cr 3 C 2 / NiCr with a nanostructured component, WC / Cr 3 C2 / Ni with a nanostructured component, while the spraying area is the entire length of the working surface except for areas adjacent to the entrance chamfers, each of which is no more than 5 mm in length.
Газотермические методы напыления позволяют сформировать тонкий слой защитного покрытия, обладающего высокой адгезией к основному материалу и низкой пористостью. Thermal spraying methods allow the formation of a thin layer of protective coating with high adhesion to the base material and low porosity.
Метод высокоскоростного газопламенного напыления позволяет произвести покрытие при низкой температуре без оплавления, что исключает внесение внутренних напряжений в корпус плунжера. Относительно низкая температура газовой струи и отсутствие свободного кислорода обеспечивает низкое содержание оксидов в покрытии, что способствует повышению его коррозионной стойкости. The method of high-speed flame spraying allows coating at low temperature without reflow, which eliminates the introduction of internal stresses into the plunger body. The relatively low temperature of the gas stream and the absence of free oxygen provides a low oxide content in the coating, which contributes to an increase in its corrosion resistance.
Применение для напыления порошковых металлокерамических материалов, таких как карбид вольфрама на кобальт-хромовой связке (WC/CoCr), карбид вольфрама на никелевой связке (WC/Ni), карбид хрома на никель-хромовой связке (СгэСг/NiCr) или смесь карбида вольфрама и карбида хрома на никелевой связке (WC/Cr3C2/Ni) в сочетании с высокоскоростным методом их напыления позволяет получить покрытие, отличающееся высокой твердостью, адгезией, коррозионной стойкостью при толщине, не превышающей сотен микрон. Сквозная пористость у такого покрытия отсутствует, а общая пористость не превышает процента. Application for spraying powdered cermet materials such as tungsten carbide on a cobalt-chromium bond (WC / CoCr), tungsten carbide on a nickel bond (WC / Ni), chromium carbide on a nickel-chromium bond (CgSg / NiCr) or a mixture of tungsten carbide and nickel-bonded chromium carbide (WC / Cr 3 C 2 / Ni) in combination with a high-speed method of spraying them allows to obtain a coating characterized by high hardness, adhesion, corrosion resistance at a thickness not exceeding hundreds of microns. The through porosity of such a coating is absent, and the total porosity does not exceed a percent.
Введение в покрытие нансотруктурированной составляющей, позволяет получить покрытие, обеспечивающее более высокую износостойкость и сплошность, а также адгезию с подложкой и когезию покрытия. The introduction of a nansotructured component into the coating allows one to obtain a coating that provides higher wear resistance and continuity, as well as adhesion to the substrate and cohesion of the coating.
Выполнение рабочей поверхности стержня с кольцевой клиновидной расточкой с образованием участка под напьшение глубиной от 0,02 до 2 мм, является операцией предварительной обработки поверхности, являющейся одним из важнейших факторов, определяющих прочность сцепления напыленного покрытия с основным металлом. Такая механическая обработка плунжера позволяет обеспечить износостойкость покрытию, предназначенному для работы в условиях больших нагрузок. The implementation of the working surface of the rod with an annular wedge-shaped bore with the formation of a plot for filing with a depth of 0.02 to 2 mm, is the operation of surface pretreatment, which is one of the most important factors determining the adhesion strength sprayed coating with base metal. This mechanical processing of the plunger allows you to provide wear resistance to the coating, designed to work under heavy loads.
Нанесение покрытия на обработанный участок под напыление, составляющий всю длину рабочей поверхности плунжера за исключением участков, прилегающих к заходным фаскам, величина каждого из которых по длине составляет не более 5 мм, позволяет обеспечить защиту практически всей поверхности плунжера, исключая при этом образование сколов покрытия после его нанесения при его последующей шлифовке, а также при эксплуатации плунжера. Coating the treated area for spraying, which is the entire length of the working surface of the plunger with the exception of areas adjacent to the entrance chamfers, the size of each of which is no more than 5 mm in length, can protect almost the entire surface of the plunger, eliminating the formation of chips after coating its application during its subsequent grinding, as well as during operation of the plunger.
На чертеже представлен общий вид плунжера насоса высокого давления нефтепромысловой установки. The drawing shows a General view of the plunger of the high pressure pump of an oil field installation.
Плунжер в виде цилиндра 1 изготовлен из конструкционной или низкоуглеродистой стали. На наружную поверхность цилиндра 1 нанесен слой наноструктурированного, функционально-градиентного покрытия 2. Слой 2 нанесен методом высокоскоростного газопламенного напыления порошкового металлокерамического материала, выбранного из следующего числа: WC/CoCr с наноструктурированной составляющей, WC/Ni с наноструктурированной составляющей, Cr3C2/NiCr с наноструктурированной составляющей, WC/Cr3C2/Ni с наноструктурированной составляющей. Покрытие нанесено на всю наружную поверхность плунжера за исключением прилегающих к его торцам участков 3, величина каждого из которых по длине плунжера составляет не более 5 мм. The plunger in the form of a cylinder 1 is made of structural or low carbon steel. A layer of nanostructured, functionally gradient coating 2 is deposited on the outer surface of cylinder 1. Layer 2 is applied by high-speed flame spraying of a cermet powder material selected from the following: WC / CoCr with a nanostructured component, WC / Ni with a nanostructured component, Cr3C2 / NiCr with a nanostructured component, WC / Cr3C2 / Ni with a nanostructured component. The coating is applied to the entire outer surface of the plunger with the exception of sections 3 adjacent to its ends, the size of each of which is not more than 5 mm along the length of the plunger.
При работе плунжера защитный слой 2 предохраняет его наружную поверхность от коррозии, возникающей в результате взаимодействия с агрессивной средой. Кроме того, этот защитный слой, обладая высокими твердостью и адгезионными характеристиками, предохраняет наружную поверхность плунжера от абразивного истирания в тяжелых условиях скважинного бурения или эксплуатации скважин. Пример реализации 1 : На наружную поверхность плунжера методом высокоскоростного газопламенного напыления нанесли наноструктурированное, функционально-градиентное покрытие на основе порошка карбида вольфрама на кобаль-хромовой связке толщиной 250 мкм. Каждая частица напыляемого порошка содержит частицы карбида вольфрама, диспергированные в материале связки (СоСг). Покрытие нанесено на расточенную до глубины 0,25 мм поверхность плунжера за исключением прилегающих к заходным фаскам участков, составляющих по 3 мм по длине плунжера от каждой фаски. Пористость покрытия составила <1%, адгезия - >80 МПа. Твердость покрытия - 1150 HV0,3. Нанесенное покрытие позволяет повысить ресурс плунжера при работе в условиях гидроабразивного изнашивания в 4 раза по сравнению с азотированием и 4-6 раз по сравнению с гальваническим хромированием. During operation of the plunger, the protective layer 2 protects its outer surface from corrosion resulting from interaction with an aggressive environment. In addition, this protective layer, having high hardness and adhesive characteristics, protects the outer surface of the plunger from abrasion in difficult conditions of borehole drilling or well operation. Implementation example 1: A nanostructured, functionally gradient coating based on tungsten carbide powder on a cobalt-chromium bond 250 μm thick was applied to the outer surface of the plunger by high-speed flame spraying. Each particle of the sprayed powder contains tungsten carbide particles dispersed in a binder material (CoCg). The coating is applied to the surface of the plunger, bored to a depth of 0.25 mm, with the exception of sections adjacent to the inlet chamfers, comprising 3 mm along the length of the plunger from each chamfer. The coating porosity was <1%, adhesion -> 80 MPa. The hardness of the coating is 1150 HV0.3. The applied coating allows to increase the plunger resource when working in conditions of hydroabrasive wear by 4 times compared to nitriding and 4-6 times compared to galvanic chrome plating.
Пример реализации 2: На наружную поверхность плунжера методом высокоскоростного газопламенного напыления нанесли наноструктурированное, функционально-градиентное покрытие на основе порошка карбида хрома на никель-хромовой связке толщиной 200 мкм. Покрытие нанесено на расточенную до глубины 0,2 мм поверхность плунжера за исключением прилегающих к заходным фаскам участков, составляющих 2 мм по длине плунжера от каждой фаски. Пористость покрытия составила <1%, адгезия - >80 МПа. Твердость покрытия - 900 HV0,3. Нанесенное покрытие позволяет повысить ресурс плунжера в 2-3 раза по сравнению с азотированием и 4 раза по сравнению с гальваническим хромированием. Implementation example 2: A nanostructured, functionally gradient coating based on chromium carbide powder on a nickel-chromium binder 200 μm thick was applied to the outer surface of the plunger by high-speed flame spraying. The coating is applied to the surface of the plunger, bored to a depth of 0.2 mm, with the exception of sections adjacent to the input chamfers, which are 2 mm along the length of the plunger from each chamfer. The porosity of the coating was <1%, adhesion -> 80 MPa. The hardness of the coating is 900 HV0.3. The applied coating allows to increase the plunger resource by 2–3 times as compared with nitriding and 4 times as compared with galvanic chrome plating.
Предлагаемое покрытие защищает наружную поверхность корпуса плунжера от коррозии при работе в очень агрессивной среде, обладает высокой твердостью, эластичностью, плотностью покрытия (99,5%), хорошо противостоит истиранию и растрескиванию., а также обеспечивает адгезию с подложкой и когезию покрытия. The proposed coating protects the outer surface of the plunger housing from corrosion when operating in a very aggressive environment, has high hardness, elasticity, coating density (99.5%), well resists abrasion and cracking, and also provides adhesion to the substrate and cohesion of the coating.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2012151077 | 2012-11-29 | ||
| RU2012151077 | 2012-11-29 |
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| WO2014084754A1 true WO2014084754A1 (en) | 2014-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2012/001124 Ceased WO2014084754A1 (en) | 2012-11-29 | 2012-12-27 | High-pressure pump plunger |
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| WO (1) | WO2014084754A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105215685A (en) * | 2015-09-22 | 2016-01-06 | 宁波市鄞州欧姆柯液压机电有限公司 | The preparation method of plunger piston slippery boots assembly |
| RU168315U1 (en) * | 2016-03-15 | 2017-01-30 | Общество с ограниченной ответственностью "Центр защитных покрытий - Урал" | HIGH PRESSURE PUMP PLUNGER |
| WO2017100739A1 (en) * | 2015-12-11 | 2017-06-15 | General Electric Company | Coatings for reducing wear on rod pump components |
| CN106906437A (en) * | 2017-02-24 | 2017-06-30 | 中国船舶重工集团公司第七二五研究所 | A kind of turbine blade high corrosion resistant scale prevention coating and its preparation technology |
| WO2017160180A1 (en) * | 2016-03-15 | 2017-09-21 | Общество С Ограниченной Ответственностью "Центр Защитных Покрытий - Урал" (Ооо "Цзпу") | High-pressure pump plunger |
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| US6454992B1 (en) * | 2000-09-29 | 2002-09-24 | Ohio Aerospace Institute | Oxidation resistant and low coefficient of thermal expansion NiA1-CoCrAly alloy |
| RU80904U1 (en) * | 2008-10-10 | 2009-02-27 | Лев Христофорович Балдаев | HIGH PRESSURE PUMP PLUNGER |
| RU2352686C2 (en) * | 2003-09-29 | 2009-04-20 | ДЖЕНЕРАЛ ЭЛЕКТРИК КОМПАНИ (э Нью-Йорк Корпорейшн) | Nano-structural coating system, components and corresponding methods of manufacturing |
| RU102700U1 (en) * | 2010-05-26 | 2011-03-10 | М.В.Алехнович | HIGH PRESSURE PUMP PLUNGER (OPTIONS) |
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| US6454992B1 (en) * | 2000-09-29 | 2002-09-24 | Ohio Aerospace Institute | Oxidation resistant and low coefficient of thermal expansion NiA1-CoCrAly alloy |
| RU2352686C2 (en) * | 2003-09-29 | 2009-04-20 | ДЖЕНЕРАЛ ЭЛЕКТРИК КОМПАНИ (э Нью-Йорк Корпорейшн) | Nano-structural coating system, components and corresponding methods of manufacturing |
| RU80904U1 (en) * | 2008-10-10 | 2009-02-27 | Лев Христофорович Балдаев | HIGH PRESSURE PUMP PLUNGER |
| RU102700U1 (en) * | 2010-05-26 | 2011-03-10 | М.В.Алехнович | HIGH PRESSURE PUMP PLUNGER (OPTIONS) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105215685A (en) * | 2015-09-22 | 2016-01-06 | 宁波市鄞州欧姆柯液压机电有限公司 | The preparation method of plunger piston slippery boots assembly |
| WO2017100739A1 (en) * | 2015-12-11 | 2017-06-15 | General Electric Company | Coatings for reducing wear on rod pump components |
| RU168315U1 (en) * | 2016-03-15 | 2017-01-30 | Общество с ограниченной ответственностью "Центр защитных покрытий - Урал" | HIGH PRESSURE PUMP PLUNGER |
| WO2017160180A1 (en) * | 2016-03-15 | 2017-09-21 | Общество С Ограниченной Ответственностью "Центр Защитных Покрытий - Урал" (Ооо "Цзпу") | High-pressure pump plunger |
| CN106906437A (en) * | 2017-02-24 | 2017-06-30 | 中国船舶重工集团公司第七二五研究所 | A kind of turbine blade high corrosion resistant scale prevention coating and its preparation technology |
| CN106906437B (en) * | 2017-02-24 | 2019-06-28 | 中国船舶重工集团公司第七二五研究所 | A kind of turbine blade high corrosion resistant scale prevention coating and its preparation process |
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