An integrated drilling tool for drilling and expansion with embedded bionic nozzle and drilling and expansion method thereof

Abstract

The invention relates to an embedded bionic nozzle type drilling and expanding integral drilling tool. The embedded bionic nozzle type drilling and expanding integral drilling tool comprises a diamond-impregnated drill bit, a transition joint, a multi-stage hole expanding device and an impacter; one end of the multi-stage hole expanding device is in sealing connection with one end of the transition joint through threads, and while the other end of the multi-stage hole expanding device is in sealing connection with one end of the impacter through the threads; the diamond-impregnated drill bit is arranged at one end of the transition joint, far away from the multi-stage hole expanding device; the multi-stage hole expanding device comprises a drill bit body and a cutting ring; a central channel which passes through the whole drill bit body is arranged in the drill bit body; the cutting ring is of a multi-stage form and arranged in the middle part of the drill bit body; the cutting diameter of the multi-stage cutting ring is gradually reduced in the hole expanding and drilling direction; the cutting ring at each stage is composed of a plurality of cutting units which are circumferentially uniformly arranged along the drill bit body. The embedded bionic nozzle type drilling and expanding integral drilling tool has the advantages that the hole drilling and expanding can be synchronously performed for the rock, so that the traditional construction work time can be greatly reduced, and moreover, the construction cost can be effectively reduced.

Description

technical field [0001] The invention relates to a drilling and expanding integrated drilling tool embedded with a bionic nozzle and a drilling and expanding method thereof. Background technique [0002] Grouting (Injection Grout), also known as grouting (Grouting), is a commonly used technical means for rock and soil reinforcement and anti-seepage and geological disaster management in mining, water conservancy and hydropower, transportation, construction and other engineering fields. It is to configure the material with filling and cementing properties into a slurry according to a certain proportion, and use the grouting equipment to inject it into the formation (rock and soil body) through the grouting pipe. The slurry is infiltrated, filled, split, compacted, etc. Diffusion in the rock and soil, with the coagulation and hardening of the grout, a "stone body" or "gel" with a relatively complete structure, high waterproof and impermeability performance, and good chemical sta...

AI Technical Summary

Problems solved by technology

[0003] In the process of drilling into holes, the traditional drilling tools and drilling methods are mostly drilling operations using a drill bit, which can only drill a single hole with the same diameter as the drill bit specification

Sometimes due to some unforeseen factors (such as borehole shrinkage, collapse, etc. caused by the instability of the hole wall), or because Party A temporarily changes the drilling design requirements, in order to meet the drilling design requirements proposed by Party A, it is necessary to Reaming the previously drilled small-diameter borehole to increase its aperture, so that the grouting pipes or other equipment with larger apertures can be lowered. At this time, according to the conventional method, only a large-caliber drill bit can only be replaced. Re-sweep the hole from the surface or re-sweep the hole with a reamer to make the hole reach the required diameter; the former, replacing a large-diameter drill bit and re-sweeping the hole from the surface can not give full play to the performance of the new drill bit, because At this time, in the process of sweeping the new drill bit, only the part of the outer circle of the drill bit that is in contact with the rock and soil mass cuts and breaks the rock and soil mass when drilling, while the part of the inner circle of the drill bit that is not in contact with the rock and soil mass is cut from the beginning to the end. Tail does not play a role all the time, until use this new drill bit to complete the sweeping work, when the outer ring part of the drill bit has been scrapped, the inner ring part of the circumference of the drill bit is still unused, which will undoubtedly cause the waste of new drill bits; the latter, using When the reamer reams the previously drilled small-diameter borehole, although it can increase the diameter of the previously drilled small-diameter borehole, the depth to which the reamer can complete the reaming is generally only the maximum depth of the previously drilled small-diameter hole. The depth of the drilled hole. After the reaming operation is completed, if you want to further deepen the previously drilled small-diameter drilled hole, you need to lift the drill and replace the reamer with a drill with a suitable size before lowering the drill to the bottom of the hole. Then drill down. This process is undoubtedly time-consuming and laborious. It not only increases the auxiliary time for lifting the drill and replacing the drill bit, but also reduces the operating efficiency of drilling and reaming construction.

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