A Deep Well Drilling Mechanism Based on Uphole Pressure Applied Automatically Strengthening the Drill Bit

Abstract

The invention belongs to the technical field of well drilling and particularly relates to an over-well pressure applying deep well drilling mechanism based on an automatic reinforced drill bit. The over-well pressure applying deep well drilling mechanism comprises an over-well pressure applying mechanism, a drill rod positioning mechanism and the automatic reinforced drill bit. The drill rod positioning mechanism is installed on a drill rod of the over-well pressure applying mechanism. The automatic reinforced drill bit is installed at the bottom end of the drill rod of the over-well pressure applying mechanism. The over-well pressure applying mechanism applies pressure through thread fit of a threaded structure, and has the advantages of being small in size and easy to control. A drill rod connecting mechanism is compact in structure, the effect that the diameter of the junction is identical to that of a drill rod body can be guaranteed, and the situation that the surface of a drilled well is damaged due to an excessively large drill rod connecting structure is avoided. Three sets of extension bars are adopted by the drill rod positioning mechanism so the drill rod can be positioned in the center, and the well surface can be reinforced through pressing wheels. The automatic reinforced drill bit can automatically adjust reinforcing pieces through a control motor according to the hardness of rock, and accordingly the service life of the drill bit is prolonged. A whole well drilling platform has a good practical effect.

Description

Technical field [0001] The invention belongs to the technical field of drilling, and in particular relates to a deep well drilling mechanism based on the pressure applied on the well on the basis of an automatically reinforced drill bit. Background technique [0002] Background 1. At present, for the drilling pressure mechanism, the drilling equipment is relatively complicated, resulting in very high manufacturing cost and use cost of the equipment, causing a great loss of material and financial resources. [0003] For drilling deep wells, the length of a drill pipe (drill string) certainly cannot meet the depth requirement, which requires multiple drill pipes to be connected. At present, the external dimensions of the drill pipe connection structure used for drilling are larger than the drill pipe itself. When the drill pipe rotates to drive the drill bit to drill, the excessively large drill pipe connection structure is likely to interfere with the drilled wellbore, thereb...

AI Technical Summary

Problems solved by technology

Both of these have certain problems. For the former, the drill bit is more or less worn when drilling the softer rock layer. The cost is high, which is not cost-effective; for the latter, it is necessary to frequently replace the drill bit to increase the time cost

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