Hydraulic jet grouting drill bit

Abstract

The invention relates to a hydraulic jet grouting drill bit. The hydraulic jet grouting drill bit is characterized in that the hydraulic jet grouting drill bit comprises a drill bit steel body, a jackscrew and a mandrel, a cutting blank block is arranged at one end of the drill bit steel body, the other end of the drill bit steel body is connected with a rotating body, and one end of the mandrel penetrates through a hollow part of the rotating body to be connected with the jackscrew. The jackscrew is arranged in the hollow part of the drill bit steel body, and a central hole of the jackscrew,a central hole of the mandrel and a central hole of the cutting blank block share the same central line. A rotational flow cavity is formed in the rotating body and communicates with the center hole of the mandrel, and one or more sets of eccentric rotating nozzles are further arranged on the rotating body and communicate with the rotational flow cavity. A plurality of propelling nozzles are further arranged at the tail of the drill bit and communicate with the central hole of the mandrel. High-pressure liquid flow is adopted as a driving source to generate rotating power, rear propelling force and front-end high-pressure jet flow, the jet flow rock breaking capacity is achieved, the drilling efficiency and the drilling depth can be improved, and extra large power system driving is not needed.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration, and in particular relates to a hydraulic rotary jet drill bit. Background technique [0002] In oil production, it is an important means to connect reservoirs by drilling branch wells or pre-setting branch pipes to open up oil flow channels. Oil and gas reservoir production. However, the drill bit at the front end of the branch pipe is usually designed to break the rock by hydraulic jet, which does not have the function of rotary drilling and cannot penetrate the reservoir efficiently, which restricts the drilling efficiency and depth of the branch pipe. In addition, the existing drill bits for petroleum and geological exploration all require a huge power system to drive, which consumes a lot of energy, and most bottom-hole power transmission mechanisms such as screws and turbines are difficult to achieve large power output with hollow structures. Contents of the invention [00...

AI Technical Summary

Problems solved by technology

However, the drill bit at the front end of the branch pipe is usually designed to break the rock by hydraulic jet, which does not have the function of rotary drilling and cannot penetrate the reservoir efficiently, which restricts the drilling efficiency and depth of the branch pipe.

In addition, the existing drilling bits for petroleum and geological exploration require a huge power system to drive, which consumes a lot of energy, and it is difficult for most bottom-hole power transmission mechanisms such as screws and turbines to achieve a large power output with a hollow structure

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