THE RESEARCH ON OFF-CENTER WEARS OF SUCKER ROD STRING AND BAR TUBE IN HORIZONTAL WELL

摘要

The rod pump oil extraction is applied the most commonly machinery extraction method in the horizontal well. However, there is a big degree of tilt and the dog-leg, underground sucker rod string off-center wear accidents often occur, causes the sucker rod string to break away or the drill tubing breakage finally. This article based on the actual bore hole path establishment horizontal well sucker-rod string's three-dimensional model, carries on the transient state dynamics simulation analysis by using the ANSYS finite element software, and predict off-center wear position of bar tube, through exerts the centralizer in the off-center wear region to optimize the pole combination, achieves the goal which reduce off-center wear of pole tube, Simultaneously established a set of numerical simulation method which is used for forecasting off-center wear position of the sucker rod and bar tube in horizontal well.