Composite impactor

Abstract

The invention belongs to the technical field of petroleum drilling, and particularly relates to a composite impactor. According to the specific technical scheme, the composite impactor is characterized in that the two ends of the composite impactor are detachably connected with an upper drilling tool and a drill bit in a threaded mode respectively, the composite impactor comprises an axial impactpart, a torsional impact part and an auxiliary part, an impact hammer of the axial impact part axially impacts an upper shell under the combined action of a spring and high-pressure drilling fluid togenerate axial impact force, a pendulum bob of the torsional impact part impacts a lower shell in a torsional mode under the action of high-pressure drilling fluid to generate torsional impact force,a reversing switch and a central pipe are connected together in an inserted mode, and meanwhile reversing is conducted on torsional impact and axial impact respectively. According to the composite impactor, the impact hammer and the pendulum bob are pushed by the high-pressure drilling fluid to generate axial impact and torsional impact respectively, the mechanical drilling speed is effectively increased, the stick-slip phenomenon at a drill string system or the drill bit is reduced, and the composite impactor is stable and reliable in an underground complex and variable environment.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and in particular relates to a composite impactor. Background technique [0002] At present, with the gradual depletion of land shallow oil and gas resources, the development of deep wells, ultra-deep wells and new oil and gas resources has gradually become a trend. In deep and ultra-deep well drilling operations, due to the influence of factors such as differences in formation drillability, strong wear resistance of rocks, high compressive strength and shear strength of rocks, the mechanical penetration rate is low during drilling, and the lengthened The drill string system is prone to stick-slip phenomenon, which reduces the efficiency of drilling operations. The existing downhole impact tools are basically a single axial impact or a single torsional impact, and the use effect is average. [0003] Therefore, how to simultaneously generate axial and torsional impacts to increase the...

AI Technical Summary

Problems solved by technology

In deep and ultra-deep well drilling operations, due to the influence of factors such as differences in formation drillability, strong wear resistance of rocks, high compressive strength and shear strength of rocks, the mechanical penetration rate is low during drilling, and the lengthened The drill string system is prone to stick-slip phenomenon, which reduces the efficiency of drilling operations

The existing downhole impact tools are basically a single axial impact or a single torsional impact, and the effect is average

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