Novel expanding drilling tool

A reaming drill, a new type of technology, applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve problems such as poor reliability and poor sealing performance, and achieve the effect of fast drilling speed and low cost.

Inactive Publication Date: 2018-03-13
何志杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of poor sealing performance and poor reliability of the existing new reaming drilling tools, the present invention provides a new reaming drilling tool, which has good mechanical properties and reduces The drilling friction is reduced, and the cutting ability is enhanced; it cooperates with the limit mechanism on the reaming drill flap to restrict the movement termination position of the reaming drill flap

Method used

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  • Novel expanding drilling tool

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Embodiment Construction

[0011] preferred,. The rotary drilling and reaming drilling tool system is mainly composed of a power head, a drill pipe, a centralizer and a reaming drilling tool. The power head provides rotational speed and torque, which is transmitted to the drill bit through the drill pipe, and the centralizer ensures that the drill pipe drills according to the preset trajectory. The three reaming petals form the reaming drilling tool, which is responsible for the reaming and cutting work in the annular area; the connecting flange connects the rotary drilling cylinder and the reaming drilling petals into a whole; the rotary drilling cylinder is used for core drilling, cutting and forming The soil debris enters the rotary excavator through extrusion and is lifted out of the hole to remove the soil. The drilling tool can complete chip removal and follow-up drilling in one hole. The specific structure is shown in Fig. 1.

[0012] Preferably, the pipe drilling reamer has two states of being...

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Abstract

A new reaming drilling tool is composed of a power head, a drill pipe, a centralizer and a reaming drilling tool. The power head provides the speed and torque, which is transmitted to the drill bit through the drill pipe, and the centralizer ensures that the drill pipe drills according to the preset trajectory; the reaming drilling tool is composed of three reaming drilling petals, and is responsible for the reaming and cutting work of the annular area; the connection method Lan connects the rotary drilling cylinder and the reaming drill flap into a whole; the rotary drilling cylinder is used for core drilling, and the soil chips formed by cutting enter the rotary drilling cylinder through extrusion to remove the soil outside the hole; Under the premise of verticality, the rapid rotation of the drill bit cuts the whole or part of the pile body, and takes out the cut pile body as a whole, and can rotate and squeeze the remaining cutting fragments in the drilling hole during the next drilling process. Into the drill barrel, so as to achieve the purpose of hole formation.

Description

Technical field [0001] The invention relates to a novel reaming drilling tool, which is especially used in roadbed construction. Background technique [0002] With the continuous development and improvement of drilling technology, new drilling methods emerge in an endless stream, and the equipment has also made significant progress. Many universities and enterprises at home and abroad have carried out a lot of research and development work in the design, manufacture and use of drill bits, and have developed from the original double-center reaming drill bit to the current commercial level reaming drill series. The double-center reaming bit includes two parts, the reamer and the pilot bit, each with its own rotation center, which can not only drill but also achieve centering. The upper part of the drilling tool is a reamer, and the radius of gyration is equal to the diameter of the required pile hole. At present, double-center drill bits have entered into serial production. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/28E21B10/32E21B27/00
CPCE21B7/28E21B10/32E21B27/00
Inventor 何志杰
Owner 何志杰
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