| 谷林,冯桓榰,周定照,何松,邢希金.一种新型油井管材机械及防腐性能研究[J].装备环境工程,2021,18(1):84-90. GU Lin,FENG Huan-zhi,ZHOU Ding-zhao,HE Song,XING Xi-jin.Research on the Mechanical and Anti-corrosion Properties of a New Type of Oil Well Pipe[J].Equipment Environmental Engineering,2021,18(1):84-90. |
| 一种新型油井管材机械及防腐性能研究 |
| Research on the Mechanical and Anti-corrosion Properties of a New Type of Oil Well Pipe |
| 投稿时间：2020-09-29 修订日期：2020-11-19 |
| DOI：10.7643/issn.1672-9242.2021.01.013 |
| 中文关键词: 00Cr9 9Cr 油井管 机械性能 防腐性能中图分类号:TG174.2 文献标识码:A 文章编号:1672-9242(2021)01-0084-07 |
| 英文关键词:00Cr9 9Cr oil well pipe mechanical properties corrosion resistance properties |
| 基金项目:中海石油(中国)有限公司科研项目(YXKY-2015-ZY-12) |
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| Author | Institution |
| GU Lin | CNOOC Research Institute Co., Ltd., Beijing 100028, China |
| FENG Huan-zhi | CNOOC Research Institute Co., Ltd., Beijing 100028, China |
| ZHOU Ding-zhao | CNOOC Research Institute Co., Ltd., Beijing 100028, China |
| HE Song | CNOOC Research Institute Co., Ltd., Beijing 100028, China |
| XING Xi-jin | CNOOC Research Institute Co., Ltd., Beijing 100028, China |
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| 中文摘要: |
| 目的 重点评价一种新型油井管钢材00Cr9材质的拉伸强度、冲击韧性、硬度及螺纹连接等力学性能和防腐性能，为该新材质的使用条件提供理论依据。方法 力学性能方面，根据GB/T 228—2002《金属材料室温拉伸试验方法》对00Cr9-110钢级的材料试样(2个)进行抗拉强度、屈服强度标准测试，参考API SPEC 5CT(2011)对该材质(2个试样)的夏比V形缺口冲击韧性(CVN吸收能)进行测试。选取00Cr9管材(00Cr9-110钢级)和马氏体不锈钢13Cr两种材质进行显微维氏硬度对比测试，同时联合国家石油管材质量监督检验中心对00Cr9管材的螺纹连接性能进行实验分析。防腐性能方面，采用腐蚀质量损失实验和硫化氢环境下抗应力腐蚀开裂(Stress Corrosion Cracking，SCC)实验分别对其防二氧化碳(CO2)和硫化氢(H2S)的耐蚀性能进行评价。腐蚀模拟实验采用磁力驱动反应釜来模拟实际腐蚀工况环境，实验过程中通过调节釜的转速带动试片模拟流速。材料的常温常压SCC实验设计的实验条件为NACE A溶液，设计加载80%实际屈服强度，温度为24 ℃，实验气体为0.1 MPa H2S，实验周期为30天，加载强度的方式包括C形环及单轴拉伸。结果 00Cr9材质较常规13Cr管材降低了金属中的含碳量，并细化了晶粒组织，使钢材中的杂质均匀化，减少了金相中的组织缺陷，从而提高了油井管的机械强度与耐蚀性能，大幅提高了现场作业效率。该材质的抗拉强度和冲击韧性满足要求，维氏硬度(HV1=256)出现硬度轻微超标的现象(规定HV1< 250)，螺纹连接性能达标。在低温含CO2的环境中点蚀速率很小，主要为均匀腐蚀，腐蚀质量损失满足要求。应力腐蚀开裂敏感性高，容易发生硫化物应力腐蚀开裂，不满足NACE MR0175抗硫要求。建议在90 ℃以下、含CO2和不含H2S的井下环境中使用。结论 目前00Cr9材质油井管价格低于普通13Cr材质管材，在渤海区域大规模应用可降低油田开发成本，未来有望在渤海地区取代目前常用的13Cr材质油井管材。 |
| 英文摘要: |
| This article aims to evaluate the tensile strength, impact toughness, hardness and threaded connection and other mechanical properties and anti-corrosion properties of a new type of oil well pipe steel 00Cr9, which provides a theoretical basis for the use of the new material. In terms of mechanical properties, according to GB/T228-2002 Metallic Material - Tensile Testing at Room Temperature, the 00Cr9-110 grade steel samples (2) were tested for tensile strength and yield strength; referring to API SPEC 5CT (2011 ), the materials (2 samples) were tested for the Charpy V-notch impact toughness (CVN absorption energy); and 00Cr9 pipe (00Cr9-110 grade) and martensitic stainless steel 13Cr were conducted for microscopy Vickers hardness comparison test. At the same time, an experimental analysis on the threaded connection performance of 00Cr9 pipe was carried out with the National Supervision and Inspection Center for Petroleum Pipe Quality. In terms of anti-corrosion properties, the corrosion resistance against carbon dioxide (CO2) and hydrogen sulfide (H2S) was evaluated through the corrosion weight loss test and anti-stress corrosion cracking (SCC) test under hydrogen sulfide environment. During the corrosion simulation experiment, a magnetic drive reactor is used to simulate the actual corrosion environment. During the experiment, the speed of the kettle is adjusted to drive the test piece to simulate the flow rate; the designed conditions for SCC test under normal temperature and pressure are as follows:the solution is NACE A solution, the load is 80% of the actual yield strength, the temperature is 24 ℃, the test gas is 0.1 MPa H2S, the test period is 30 days, and the method of loading strength includes C-ring and uniaxial stretching. The research results show that compared with the conventional 13Cr pipe material, 00Cr9 material reduces the carbon content in the metal, refines the grain structure, homogenizes the impurities in the steel, and reduces the structural defects in the metallography, such improving the mechanical strength and corrosion resistance properties of the oil well pipe, and greatly enhancing the efficiency of on-site work. The tensile strength and impact toughness of this material meet the requirements, the Vickers hardness (HV1=256) has slightly exceeded the standard hardness (specified as HV1<250), and the threaded connection performance reaches the standard. The pitting corrosion rate in the low-temperature environment with CO2 is very small, mainly uniform corrosion, and the corrosion weight loss meets the requirements. The stress corrosion cracking sensitivity is high, and sulfide stress corrosion cracking is prone to occur, so it does not meet the NACE MR0175 sulfur resistance requirements. It is recommended to be used in downhole environment below 90 ℃, with CO2 and without H2S. At present, the price of 00Cr9 oil well pipe is lower than ordinary 13Cr pipe. With large-scale application in the Bohai Sea area, the oilfield development costs can be reduced. It is expected to replace the currently commonly used 13Cr oil well pipe in the Bohai Sea in the future. |
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