Radiation hole guide drilling equipment and process

Abstract

The invention discloses radiation hole guide drilling equipment and process. The radiation hole guide drilling equipment comprises a guide instrument, a guide drilling machine and double-layer drill rod. The guide drilling machine is provided with a double rotary power head. The double-layer drill rod comprises an outer drill rod on the outer layer and an inner drill rod on the inner layer. The outer drill rod and the inner drill rod are connected with two power output connectors of the double rotary power head correspondingly. The radiation hole guide drilling equipment further comprises a double pipe guide joint and a guide drill bit. The double pipe guide joint comprises an outer pipe and an inner pipe. One end of the outer pipe is connected with the outer drill rod. One end of the inner pipe is connected with the inner drill rod. The outer pipe is provided with a probe bin internally provided with a probe communicating with the guide instrument. The guide drill bit is connected to the other end of the inner pipe. According to the drilling process conducted through the radiation hole guide drilling equipment, deflecting is conducted through the outer drill rod in the double-layer drill rod during drilling, drilling is conducted through the inner drill rod, and the drilling precision is high. Reverse circulation drilling is conducted through the double-layer drill rod, thus the space between the outer drill rod and the hole wall is filled with under-pressure drilling fluid, and the stability of the sandy gravel well wall can be maintained effectively.

Description

technical field [0001] The invention relates to the field of geological drilling, in particular to a radiant hole-guided drilling equipment and technology. Background technique [0002] In the prior art, the sandy pebble formation is the main aquifer, but the sandy pebble formation is soft and hard, and has poor cementation. In the existing drilling technology, it is a particularly difficult formation to drill into. The main problem caused by the staggered soft and hard sand and pebble formation is that the drilling direction is difficult to control, and the problem caused by poor cementation is mainly the poor stability of the borehole wall, which is easy to collapse the hole. At present, the down-the-hole hammer and pipe drilling technology is an effective method for drilling sand and pebble formations, but the down-the-hole hammer and pipe drilling can only be used in non-water formations and the drilling efficiency is low. [0003] Radiation wells can increase the water...

AI Technical Summary

Problems solved by technology

[0004] The limitations of the traditional construction method are: (1) Since the construction personnel have to go down into the narrow shaft, the construction environment is particularly harsh and the safety is poor

(2) Due to the limited space, the ability of the percussion rotary drilling rig is greatly limited, resulting in the length of the radiation hole being greatly limited

(3) The radiant hole is easy to collapse during the drilling process, and it is difficult to arrange the water filter pipe after the radiant hole is completed

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