Over-well drill bit pressing mechanism for well drilling

Abstract

The invention belongs to the technical field of well drilling, and particularly relates to an over-well drill bit pressing mechanism for well drilling. The mechanism comprises a drill rod fixing mechanism sliding groove, a first rotary shaft, a second gear, a first gear, a threaded pressing mechanism, a drill rod body, a drill rod connecting structure, a drill rod fixing mechanism and a hollow driving rotary shaft, wherein the hollow driving rotary shaft and the drill rod body are connected through the drill rod fixing mechanism, the drill rod fixing mechanism can slide in the drill rod fixing mechanism sliding groove, and the hollow driving rotary shaft is in thread fit with a thread structure; a driving motor rotary shaft rotates to drive the first rotary shaft through the gear assembly to rotate, and the hollow driving rotary shaft moves downwards so as to press the drill rod while rotating under the driving of the first rotary shaft and the action of the thread structure. Furthermore, the drill rod connecting mechanism is compact in structure, it can be guaranteed that the diameter of the connection position is identical with that of the drill rod body, and damage of an oversized drill rod connecting structure to a borehole surface is avoided. The whole mechanism has a certain practical effect.

Description

Technical field [0001] The invention belongs to the technical field of drilling, and in particular relates to an uphole drill bit pressure applying mechanism for drilling. Background technique [0002] At present, for the pressure-applying mechanism of drilling, the drilling equipment is relatively complicated, which results in very high manufacturing cost and use cost of the equipment, and causes 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, thereby destroying the The well has been drilled, causing unnecessar...

AI Technical Summary

Problems solved by technology

[0002] At present, for the pressure mechanism of drilling, 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 one drill pipe (drill string) cannot meet the depth requirement, which requires multiple drill pipes to be connected together.

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, thereby destroying the well drilled, causing unnecessary trouble

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