WO2017160180A1 - High-pressure pump plunger - Google Patents
High-pressure pump plunger Download PDFInfo
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- WO2017160180A1 WO2017160180A1 PCT/RU2016/000511 RU2016000511W WO2017160180A1 WO 2017160180 A1 WO2017160180 A1 WO 2017160180A1 RU 2016000511 W RU2016000511 W RU 2016000511W WO 2017160180 A1 WO2017160180 A1 WO 2017160180A1
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- WIPO (PCT)
- Prior art keywords
- coating
- plunger
- pressure pump
- thickness
- pump plunger
- 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.)
- Ceased
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Classifications
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
-
- 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
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.
- Well sucker rod pumps are used for deep oil production.
- a high-pressure plunger is known from the prior art for pumping a solution for cementing oil or gas wells with a coating deposited on its surface (Application WO2014 / 084754, December 27, 2012).
- 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 technical result is to increase the resource of the workpiece, reducing the technological cycle by eliminating one of the operations.
- the plunger of the high-pressure pump contains a coating 2-2.5 mm thick deposited on its surface, and a NiCr-based sublayer no more than 0.5 mm thick is applied under the coating by high-speed flame spraying.
- the method of high-speed flame spraying allows coating at low temperature without reflow, which eliminates the introduction of internal voltages in the plunger body.
- Application of the sublayer by the high-speed flame method allows to obtain a coating that provides higher adhesion with the substrate of the nanostructured coating.
- the coating sublayer is applied over the entire length of the working surface of the plunger with the exception of areas adjacent to the entrance chamfers, each of which is no more than 5 mm in length.
- 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 NiCr-based sublayer 2 is deposited on the outer surface of cylinder 1 by a thickness of not more than 0.5 mm by high-speed flame spraying.
- a base layer of nanostructured, functionally gradient coating 2 is applied to the sublayer 2 by high-speed flame spraying.
- the coating is applied to the entire outer surface of the plunger 1, 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.
- a two-layer coating 2 protects its outer surface from corrosion resulting from interaction with aggressive Wednesday.
- this protective coating 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 The depth of corrosion of the working surface of the plunger of the plunger of a high pressure pump was 2.1-2.3 mm per 10% of the surface. To restore the working surface of the plunger, a turning was carried out in order to remove foci of corrosion. Next, a 0.3 mm thick NiCr-based sublayer was applied to the outer surface of the plunger by high-speed flame spraying. Then, the main protective layer was applied to the sublayer by high-speed flame spraying in the form of a nanostructured, functionally gradient coating based on tungsten carbide powder on a 2 mm thick cobalt-chromium binder. Adhesion strength was 83-85 MPa. The hardness of the coating is 1110-1240 HV0.3. The service life of the plunger when working in conditions of hydroabrasive wear with a two-layer coating increased by 5 times compared to nitriding and 6 times compared to galvanic chrome plating.
- Implementation example 2 To restore the geometry of the plunger’s working surface with a wear depth of no more than 2.5 mm, a 0.5 mm thick NiCr-based subcoat and the main protective layer based on chromium carbide on a nickel-chrome bond were applied to the outer surface of the plunger by high-speed flame spraying 2 mm thick. Adhesion strength was 82.1 MPa. The service life of the plunger under conditions of increased content of hydrogen sulfide with a two-layer coating increased by 6 times compared with galvanic chromium plating.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Details Of Reciprocating Pumps (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. Скважинные штанговые насосы применяются для глубинной добычи нефти.The device is intended for use in the field of oilfield equipment in the design, manufacture, use and repair of high pressure plunger pumps. Well sucker rod pumps are used for deep oil production.
Для снижения себестоимости добычи нефти необходимо в значительной степени повысить надёжность этих насосов, что в значительной степени влияет на экономическую эффективность нефтедобывающих предприятий. To reduce the cost of oil production, it is necessary to significantly increase the reliability of these pumps, which greatly affects the economic efficiency of oil producers.
С целью повышения ресурса плунжеров насоса наносится на поверхность плунжера износостойкие коррозионно-стойкие металлокерамические, керамические покрытия с низким коэффициентом трения. In order to increase the life of the pump plungers, wear-resistant corrosion-resistant metal-ceramic, ceramic coatings with a low coefficient of friction are applied to the surface of the plunger.
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 сокращение технологических операций, а также не являются ремонтопригодными, т.е. не решается задача обеспечения экономической эффективности нефтедобывающих предприятий. Глубина износа плунжеров насосов высокого давления может быть более 2 мм, что накладывает определенные требования к технологии нанесения защитного покрытия. Наноструктурированные покрытия, наносимые методами газотермического напыления, на устройства, которые используются в промысловых службах и, в частности, в нефтегазовых скважинах, обладают высокой устойчивостью к диффузии пластовых газов и жидкостей, однако такие покрытия не обеспечивают стойкость к знакопеременным нагрузкам. These methods do not provide a reduction in technological operations, and are also not repairable, i.e. the problem of ensuring the economic efficiency of oil producing enterprises is not being solved. Depth of wear of the plungers of high pressure pumps can be more than 2 mm, which imposes certain requirements on the technology of applying a protective coating. Nanostructured coatings applied by thermal spraying methods to devices used in field services and, in particular, in oil and gas wells, are highly resistant to diffusion of formation gases and fluids, but such coatings do not provide resistance to alternating loads.
ОПИСАНИЕ DESCRIPTION
Из уровня техники известен плунжер высокого давления, предназначенный для закачки раствора для цементирования нефтяных или газовых скважин с нанесенным на его поверхность покрытием (Заявка WO2014/084754, 27.12.2012). A high-pressure plunger is known from the prior art for pumping a solution for cementing oil or gas wells with a coating deposited on its surface (Application WO2014 / 084754, December 27, 2012).
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.
Техническим результатом является увеличение ресурса обрабатываемой детали, сокращение технологического цикла за счет исключения одной из операций. The technical result is to increase the resource of the workpiece, reducing the technological cycle by eliminating one of the operations.
Технический результат достигается тем, что плунжер насоса высокого давления содержит нанесенное на его поверхность покрытие толщиной 2-2,5 мм, причем под покрытие нанесён подслой на основе NiCr толщиной не более 0,5 мм методом высокоскоростного газопламенного напыления. The technical result is achieved by the fact that the plunger of the high-pressure pump contains a coating 2-2.5 mm thick deposited on its surface, and a NiCr-based sublayer no more than 0.5 mm thick is applied under the coating by high-speed flame spraying.
Метод высокоскоростного газопламенного напыления позволяет произвести покрытие при низкой температуре без оплавления, что исключает внесение внутренних напряжений в корпус плунжера. Нанесение подслоя высокоскоростным газопламенным методом позволяет получить покрытие, обеспечивающее более высокую адгезию с подложкой наноструктурированного покрытия. The method of high-speed flame spraying allows coating at low temperature without reflow, which eliminates the introduction of internal voltages in the plunger body. Application of the sublayer by the high-speed flame method allows to obtain a coating that provides higher adhesion with the substrate of the nanostructured coating.
Преимуществом данного решения является то, что нет необходимости проводить предварительную обработку поверхности в виде кольцевой клиновидной расточки, что является одним из существенных факторов, определяющих технико- экономическую привлекательность предлагаемого решения. The advantage of this solution is that there is no need to pre-treat the surface in the form of an annular wedge-shaped bore, which is one of the significant factors determining the technical and economic attractiveness of the proposed solution.
Также как и основной слой защитного покрытия, нанесение подслоя покрытия осуществляется на всю длину рабочей поверхности плунжера за исключением участков, прилегающих к заходным фаскам, величина каждого из которых по длине составляет не более 5 мм. As well as the main layer of the protective coating, the coating sublayer is applied over the entire length of the working surface of the plunger with the exception of areas adjacent to the entrance chamfers, each of which is no more than 5 mm in length.
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 подслой 2 на основе NiCr толщиной не более 0,5 мм методом высокоскоростного газопламенного напыления. Далее на подслой 2 нанесен основной слой наноструктурированного, функционально-градиентного покрытия 2 методом высокоскоростного газопламенного напыления. The plunger in the form of a cylinder 1 is made of structural or low carbon steel. A NiCr-based sublayer 2 is deposited on the outer surface of cylinder 1 by a thickness of not more than 0.5 mm by high-speed flame spraying. Next, a base layer of nanostructured, functionally gradient coating 2 is applied to the sublayer 2 by high-speed flame spraying.
Покрытие нанесено на всю наружную поверхность 1 плунжера за исключением прилегающих к его торцам участков 3, величина каждого из которых по длине плунжера составляет не более 5 мм. The coating is applied to the entire outer surface of the plunger 1, 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 двуслойное покрытие 2 предохраняет его наружную поверхность от коррозии, возникающей в результате взаимодействия с агрессивной средой. Кроме того, это защитное покрытие, обладая высокими твердостью и адгезионными характеристиками, предохраняет наружную поверхность плунжера от абразивного истирания в тяжелых условиях скважинного бурения или эксплуатации скважин. During the operation of the plunger, a two-layer coating 2 protects its outer surface from corrosion resulting from interaction with aggressive Wednesday. In addition, this protective coating, having high hardness and adhesive characteristics, protects the outer surface of the plunger from abrasion in difficult conditions of borehole drilling or well operation.
Пример реализации 1 : Глубина коррозионного износа рабочей поверхности плунжера насоса высокого давления составила 2,1-2,3 мм на 10% поверхности. Для восстановления рабочей поверхности плунжера была проведена токарная обработка с целью удаления очагов коррозии. Далее на наружную поверхность плунжера методом высокоскоростного газопламенного напыления нанесли подслой на основе NiCr толщиной 0,3 мм. Далее на подслой был нанесен основной защитный слой методом высокоскоростного газопламенного напыления в виде наноструктурированного, функционально-градиентное покрытие на основе порошка карбида вольфрама на кобаль-хромовой связке толщиной 2 мм. Прочность сцепления составила 83-85 МПа. Твердость покрытия - 1110-1240 HV0,3. Срок службы плунжера при работе в условиях гидроабразивного изнашивания с двухслойным покрытием увеличился в 5 раз по сравнению с азотированием и 6 раз по сравнению с гальваническим хромированием. Implementation example 1: The depth of corrosion of the working surface of the plunger of the plunger of a high pressure pump was 2.1-2.3 mm per 10% of the surface. To restore the working surface of the plunger, a turning was carried out in order to remove foci of corrosion. Next, a 0.3 mm thick NiCr-based sublayer was applied to the outer surface of the plunger by high-speed flame spraying. Then, the main protective layer was applied to the sublayer by high-speed flame spraying in the form of a nanostructured, functionally gradient coating based on tungsten carbide powder on a 2 mm thick cobalt-chromium binder. Adhesion strength was 83-85 MPa. The hardness of the coating is 1110-1240 HV0.3. The service life of the plunger when working in conditions of hydroabrasive wear with a two-layer coating increased by 5 times compared to nitriding and 6 times compared to galvanic chrome plating.
Пример реализации 2: Для восстановления геометрии рабочей поверхности плунжера с глубиной износа не более 2,5 мм на наружную поверхность плунжера методом высокоскоростного газопламенного напыления нанесли подслой на основе NiCr толщиной 0,5 мм и основной защитный слой на основе карбида хрома на никель- хромовой связке толщиной 2 мм. Прочность сцепления составила 82,1 МПа. Срок службы плунжера в условиях повышенного содержания сероводорода с двухслойным покрытием увеличился в 6 раз по сравнению с гальваническим хромированием. Implementation example 2: To restore the geometry of the plunger’s working surface with a wear depth of no more than 2.5 mm, a 0.5 mm thick NiCr-based subcoat and the main protective layer based on chromium carbide on a nickel-chrome bond were applied to the outer surface of the plunger by high-speed flame spraying 2 mm thick. Adhesion strength was 82.1 MPa. The service life of the plunger under conditions of increased content of hydrogen sulfide with a two-layer coating increased by 6 times compared with galvanic chromium plating.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2016109100 | 2016-03-15 | ||
| RU2016109100 | 2016-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017160180A1 true WO2017160180A1 (en) | 2017-09-21 |
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ID=59850411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2016/000511 Ceased WO2017160180A1 (en) | 2016-03-15 | 2016-08-05 | High-pressure pump plunger |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2017160180A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2283363C2 (en) * | 2003-07-15 | 2006-09-10 | ОАО "Композит" | Method of making erosion-resistant heat-protective coats |
| RU70922U1 (en) * | 2007-09-14 | 2008-02-20 | Центр Разработки Нефтедобывающего Оборудования (Црно) | CASE OF INSTALLATION OF SUBMERSIBLE CENTRIFUGAL PUMP FOR OIL PRODUCTION |
| RU102700U8 (en) * | 2010-05-26 | 2011-05-27 | Юрий Павлович Смольский | HIGH PRESSURE PUMP PLUNGER (OPTIONS) |
| WO2014084754A1 (en) * | 2012-11-29 | 2014-06-05 | Общество С Ограниченной Ответственностью "Центр Защитных Покрытий-Урал" | High-pressure pump plunger |
-
2016
- 2016-08-05 WO PCT/RU2016/000511 patent/WO2017160180A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2283363C2 (en) * | 2003-07-15 | 2006-09-10 | ОАО "Композит" | Method of making erosion-resistant heat-protective coats |
| RU70922U1 (en) * | 2007-09-14 | 2008-02-20 | Центр Разработки Нефтедобывающего Оборудования (Црно) | CASE OF INSTALLATION OF SUBMERSIBLE CENTRIFUGAL PUMP FOR OIL PRODUCTION |
| RU102700U8 (en) * | 2010-05-26 | 2011-05-27 | Юрий Павлович Смольский | HIGH PRESSURE PUMP PLUNGER (OPTIONS) |
| WO2014084754A1 (en) * | 2012-11-29 | 2014-06-05 | Общество С Ограниченной Ответственностью "Центр Защитных Покрытий-Урал" | High-pressure pump plunger |
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