Both the derrick deviation and the wellhead's eccentricity will cause the serious wearing of the casing (or casing protecting tube) close to the wellhead.
井架不正或井口偏心，会造成近井口套管（或套管防磨套）的磨损。
Through the contact test of underground reference electrode, we have tested the natural potential, casing protecting potential, the anode working potential, and the anode open circuit potential.
根据地下参比电极接触测试原理，测试了套管被保护前后纵向深度上的套管自然电位、套管保护电位、阳极工作电位和阳极开路电位。
Additionally, have put forward the Suggestions in protecting casing, saving workover fee, reducing costs and increasing economic benefits.
为今后如何进一步保护好套管，节省大修费用，降低成本，提高经济效益等方面提出了建议。
应用推荐