Using selfdeveloped LSW201 additive, the effects of intensifying distillation on Oman crude oil were determined at different concentrations by simple distillation．After using LSW201 additives in vacuum distillation devices of Luoyang petrochemical refinery, LWS201 1# additive was very good. The experimental and industrial results show that LSW201 additive for crude oil distillation has a good strengthening effect, the best mass fraction of additive is 100～120 μg/g.

In the processing of downhole accidents especially reservoir head accident, the fish head was not in the middle of the hole, and even attached to the variation of well radius was big. Therefore it was very difficult to implement common fishing method. On the site flexible elbow joints and bending drill pipes were generally to use to look for the fish. It would bend drill pipes many times, then cause waste and even safety accidents. According to this situation, the adjustableangle bend drill pipe was designed. It consisted of top connection, spline body, adjustable sleeve and lowercontact and so on. By adjusting spline body and adjustable sleeve, 0°～4°angle adjustment could be finished. The model machine of the adjustableangle bend drill pipe had been manufactured and applied to many oil wells. The results showed that it was available that the adjustableangle bend drill pipe was applied to fish the fishing head, which was easy to adjust the pipe on wellhead. The application was successful and 300 thousands could be saved per well.