摘要
目前沿用API19B规定的方法来评价射孔器的穿孔性能。该方法以射孔器在混凝土靶中的射孔穿透深度来检测其穿孔性能，用与靶同期制备的混凝土立方试块的抗压强度来间接评价靶的强度。但是实际应用的API靶自身的性能并未能被有效控制，测量数据显示，不同的API靶的声速，或同一API靶的不同部位的声速，以及API靶与同期试块的声速之间，都存在较大差异。API靶性能的差异使射孔器穿透深度测量值产生30％～40％的变化。分析了混凝土凝固过程的内分层现象、水泥品种、配合比、振动、养护与环境等5个因素对混凝土靶强度的影响，认为混凝土靶与声速值相同或相近的同期试块的强度应该基本相同；设计并制作了可精确控制强度的柱状组合标准靶；建立了以超声波声速来检测射孔器检测靶的方法。推荐使用这种柱状组合标准靶取代API靶来评价射孔深度，以提高检测结果的可比性。
The method prescribed by API19B standard is followed along nowadays in evaluating penetrating property of perforator. The method measures penetrating property of the perforator with its penetration length in a concrete target, and indirectly evaluates unconfined compression strength of the concrete target with that of a cubic concrete sample prepared synchronously with the target. However, properties of API targets being practically used itself are far away from being controlled, test data show that velocities of different API targets, or velocities of different parts in a target, as well as velocities between the API target and the synchronous cubic sample, are all obviously various. The discrepancies of API targets result in varieties of 30%-40% for penetration length measurements. Analyzed are 5 factors which effect on the target strength, such as internal delaminating phenomenon during target concreting, varieties of cements, ingredient ratio, vibration, maintain and environment; considered is that the strengths should be basically identical for the concrete target and its synchronous cubic sample with same or near sonic velocities; designed and manufactured is a combined columnar standard target whose strength can be accurately controlled; and established is a method to inspect the standard target with velocity of ultrasonic. The combined columnar standard target is suggested to replace the API target for testing penetration length of perforation to improve testing comparability.
出处
《测井技术》
CAS
CSCD
2008年第2期118-122,共5页
Well Logging Technology
关键词
石油射孔器
API19B标准
声速
检测方法
精确控制靶
petroleum perforator, API19B standard, sonic velocity, inspection method, targetcontrolled accurately
作者简介
刘向京 男，工程师，1992年毕业于北京理工大学，现从事射孔完井技术研究工作。
