An auxiliary downhole drilling tool

Abstract

The invention discloses a downhole auxiliary hole drilling tool. An impacting energy generator is included, and can be used for converting energy of well drilling liquid so that axial impacting energycan be generated. An impacting energy allocator is included, and can be used for allocating the axial impacting energy generated by the impacting energy generator again, an axial impacting force is converted into a composite impacting force, and therefore the impacting force changing at a high frequency in the composite direction is provided for a drill bit, and the rock breaking efficiency of the drilling tool is greatly improved and the mechanical drilling speed of the drilling tool is greatly increased. The downhole auxiliary hole drilling tool further comprises a shock absorbing twistingstabilizing device arranged between the impacting energy generator and the impacting energy allocator, the shock absorbing twisting stabilizing device can be used for lowering the axial vibration of the well drilling tool, the stick-slip phenomenon is reduced, impacting on the drill bit is reduced, and the service life of the drill bit is effectively prolonged.

Description

technical field [0001] The invention relates to the technical fields of petroleum industry machinery technology and drilling technology, in particular to an auxiliary downhole drilling tool. Background technique [0002] With the continuous development of oil drilling technology, many drilling tools with different functions have appeared in order to meet the needs of drilling engineering. With the rapid development of science and technology, the performance of drilling tools in the prior art has been greatly improved. [0003] However, in some special working conditions, there are still some problems. For example, when constructing in soft and hard formations or hard formations, due to the large lithology changes or high strength of such formations, the formation is soft and hard, and it is easy to induce downhole drilling tool vibration during the drilling process, resulting in the drill bit being in dynamic state for a long time. Unstable working condition. The instabil...

AI Technical Summary

Problems solved by technology

At the same time, the downhole auxiliary drilling tool can provide the drill bit with a high-frequency changing compound direction impact force. In addition, the downhole auxiliary drilling tool can also automatically store and release the torque exceeding the limit value during the drilling process, so as to effectively Increase the rock-breaking ability of the drill bit, improve the rock-breaking efficiency, and solve the problems of the drill bit in hard formations and interlayers such as jumping, stick-slip, "stall", and slow mechanical drilling speed.

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