摘要
针对聚晶金刚石复合片脱钴处理后,金刚石层出现微观空隙结构,抗冲击性能减弱的问题,利用微观粒子充填的方法,选取类金刚石作为充填剂,对金刚石层进行充填处理,利用扫描电子显微镜和PDC抗动载性能测试仪,对充填和未充填的复合片进行对比试验分析。试验表明,充填的复合片其金刚石层表面形成类金刚石薄膜,有利于分散冲击过程中形成的瞬间应力集中;充填的复合片其抗冲击性能得到显著提高,能承受30 J的冲击功4~5次,承受的总冲击功高达450 J;未充填的复合片能承受100 J的总冲击功,再经过1次20 J的冲击后,金刚石层会出现裂纹或脱落的现象。进一步分析试验条件对充填金刚石复合片的抗冲击性能影响,结果显示,射频功率越大,氩气、甲烷和氢气的流量比为5∶10∶30,沉积时间为180 min时,充填的金刚石复合片的抗冲击性能最佳。
After the cobalt is taken off from polycrystalline diamond compacts,the microcosmic space will be formed in the diamond layer and the impact resistance of PDC is weakened.Selecting the diamond-like carbon as fillers,by microscopic particles filling method,the diamond layers were filled.Then by the scanning electron microscopy and the PDC anti-dynamic load performance tester,the filled and unfilled PDC S were compared.The results show that,(1)Filled PDC s have a diamond like carbon film on the surface of its diamond layer,is beneficial to dispense the momentary stress concentration formed during the moment of impact,(2)filled PDC’s impact resistance has been obviously improved,which can withstand the impact of30J for4or5times,the total impact up to450J,(3)unfilled PDC s can withstand the impact of10J for10times,but it will cause cracks or shedding after one time impact of20J.The influence of the experimental conditions on the impact resistance of filled PDC s is also studied,the result shows that when the RF power is larger,the flow rate of argon,methane and hydrogen is5:10:30,the deposition time is180minutes,the impact resistance of filled PDC s reaches the best.
作者
孙伟
赵海峰
张天翔
熊远贵
王倩
王小华
甄怀宾
朱卫平
SUN Wei;ZHAO Haifeng;ZHANG Tianxiang;XIONG Yuangui;WANG Qian;WANG Xiaohua;ZHEN Huaibin;ZHU Weiping(Zhonglian CBM State Engineering Research Center Co. Ltd., Beijing 100089, China;School of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China;Coalbed Methane Co. Ltd., PetroChina, Beijing 1020028, China;China University of Mining & Technology, Beijing 100083, China)
出处
《钻采工艺》
CAS
北大核心
2018年第6期87-89,105,130,共5页
Drilling & Production Technology
基金
国家自然科学基金面上项目“一种复杂缝网的能量断裂准则及其在致密砂岩压裂模拟中的应用”(编号:11672333)
国家科技重大专项“复杂结构井、丛式井设计与控制新技术”(编号:2017ZX05009-003)
中国石油大学(北京)克拉玛依校区人才引进科研启动项目“致密砂岩气井体积压裂的动力学机理及设计方法研究”(编号:RCYJ2018A-01-004)
大型油气田及煤层气开发“深部薄煤层群水力裂缝延伸机理实验研究”(编号:2016ZX05042-003)。
