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Indroduced are applications of downhole video logging tool in casing inspections. The tool includes surface and downhole systems. With the post-light lighting, visibility in borehole is obviously improved. The patented chemical activators may protect the tool's camera lens and lamp house from crude oil contamination. The tool allows us to inspect casing breaking and deformation, locate actual fish position and sand surface, discover the leakage points, chech perforation, liquid and gas producing capacity as...

Indroduced are applications of downhole video logging tool in casing inspections. The tool includes surface and downhole systems. With the post-light lighting, visibility in borehole is obviously improved. The patented chemical activators may protect the tool's camera lens and lamp house from crude oil contamination. The tool allows us to inspect casing breaking and deformation, locate actual fish position and sand surface, discover the leakage points, chech perforation, liquid and gas producing capacity as well as casing status in the perforated intervals, etc.. On the basis of analyzing factors effecting image visibility, the casing inspection technique and its available ranges are worked out. A combination of the tool with eight-arm caliper and magnetic logging device provides more reliable logging data.

介绍了可见光井下电视测井系统在套管检测中的应用方法。其系统分地面仪器和井下仪器两部分 ,井下采用后置灯技术以增加井筒内的可视度。专利化学活性剂的使用保护了摄像镜头和灯罩的不被原油沾附。其系统可用于检查套管错断和变形 ;探测鱼头和砂面 ;找漏 ;检查射孔状况、射孔层位产液产气状况、射孔段套管状况等。分析了影响图像清晰度的各种因素 ,由此制订了测试工艺及应用范围。配套使用了八臂井径仪和磁重力测井系统 ,两种手段综合利用 ,大大提高了测试资料的可靠性

 
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