Research and Application of Single-bending Screw Anti-oblique Straightening Technology in Yongchuan Block
The drillability of the upper strata in the Yongchuan block is poor,with large differences in dip angles,and the development of faults is prone to well deviation.Conventional anti deviation drilling tool combinations cannot effectively control well deviation.During the construction process of YY5-1HF well in the vertical section,large-sized drill collars were used in combination with straight screw drilling tools,single curved screw pendulum drilling tools,and vertical drilling tools for anti inclination and straightening.The application effect shows that the single curved screw pendulum drilling tool combination can achieve the purpose of anti inclination.By matching appropriate drilling parameters and optimizing the drill bit,the mechanical drilling speed can be effectively improved.The use of single curved screw combination sliding to reduce inclination is a more active anti inclination and straightening measure,which needs further exploration.
well deflectionanti-oblique straightcombination drilling stringdrilling parameterrate of penetration
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