新型剖分式现场油管缺陷检测装置

目前油田在用的油管缺陷检测装置主要存在井口磁化总成安装困难、不具有井口自密封功能和检测信号不稳定等问题,为此开发了一种新型剖分式现场油管缺陷检测装置。该检测装置在油管起下井作业时进行在线检测,不受水、油污和结蜡等的影响,对环境无污染,同时检测装置安装时只需要将井口装置打开,抱合在油管上即可。在声音自动判废信号处理总成中增加了小波滤波装置,更好地消除了震荡等干扰信号。应用该装置现场检测73 mm油管500根,其中轴向沟槽类缺陷油管124根,占检测油管总数的24.8%;孔洞类缺陷油管32根,占检测油管总数的6.4%。最后指出该检测装置可有效防范井下险情,为油田安全生产提供技术保障。

The Split Type On-site Inspection Device for Tubing

In the light of the problems with the existing tubing defects inspecting device,a split-type on-site inspection device was developed.The new device conducts online detection in tubing tripping,free of effects from water,oil pollution and wax deposit.It does not pollute the environment.Meanwhile,the device structure is improved as a split one so that it is just necessary to open the wellhead to clutch the tubing in installation.The wavelet filtration device is added in the signal processing assembly of sound automatic disuse determination,better eliminating the interference signals such as oscillation.The field application of the device to detect 500 73-mm tubings shows that 124 tubings have axial grooves,accounting for 24.8% of the total detected tubings,and 32 tubings have holes,accounting for 6.4% of the total.Finally,it is pointed out that the device has its own wellhead self-seal device and thus it can effectively prevent downhole dangers,providing the technological support for safe production in oilfields.