Impacting helicoid hydraulic motor and transmission shaft assembly

Abstract

The invention discloses an impacting helicoid hydraulic motor and transmission shaft assembly, which comprises transmission shafts and external bodies, wherein bidirectional limiting bearings are arranged between the external bodies and the transmission shafts. The impacting helicoid hydraulic motor and transmission shaft assembly is characterized in that: the transmission shafts consist of an upper transmission shaft and a lower transmission shaft; the external bodies corresponding to the transmission shafts also consist of an upper external body and a lower external body; an annular rigid impact socket and an upper vibration starting seat which are connected into a whole are movably arranged in an annular cavity between a lower external body and the lower transmission shaft; the lower end of the annular rigid impact socket is provided with an impact seat fixedly connected with the lower transmission shaft; and vibration starting devices are arranged between the upper vibration starting seat and the lower transmission shaft as well as between the annular rigid impact socket and the lower transmission shaft. While retaining the functions of a helicoid hydraulic motor, the impactinghelicoid hydraulic motor and transmission shaft assembly has the functions of a hydraulic impactor which is long in service life and controllable in frequency and impact force. The impacting helicoidhydraulic motor and transmission shaft assembly can greatly improve rock breaking efficiency of a drill bit and the drilling speed of a drilling machine and reduce the drilling construction cost during drilling construction of various wells.

Description

technical field [0001] The invention relates to the technical field of hydraulic impactors and screw drilling tools for oil drilling and geological exploration drilling, in particular to a screw drilling tool transmission shaft assembly with impact function. Background technique [0002] Screw drilling tools are mature downhole power drilling tools for oil drilling or geological exploration drilling all over the world. They are essential tools for directional well drilling and compound drilling. The speed is also about the same. How to increase the drilling speed is a technical problem being studied by countries all over the world. [0003] The core technical content of improving the drilling speed is how to improve the rock-breaking efficiency of the drill bit. Around the content of this technology, in addition to the research on drill bit technology, hydraulic jet rock breaking technology and other drilling technologies, the concept of rotary percussion drilling technolo...

AI Technical Summary

Problems solved by technology

The pneumatic impactor uses air as the circulating medium, and its working principle is similar to that of the hydraulic impactor. Because there is no erosion of liquid or destruction of solid particles, the design is relatively easy, and its service life and application effect are better than those of the hydraulic impactor. But it is only used for air drilling, and the application range is limited

Other types of impactors (or jars) are limited to use on the ground or on the surface, and cannot be used in oil drilling or geological exploration drilling, so they will not be described in detail.

[0004] The working principle of the existing hydraulic hammer severely restricts the further development of the technology and limits the application of impact rock breaking technology in drilling, while the single function of traditional screw drilling tools also limits the expansion of its application scale and the broadening of its field

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