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A kind of drilling tool and drilling method

A drilling method and drilling tool technology, which are applied to drilling equipment and methods, directional drilling, earthwork drilling, etc., can solve problems such as inability to meet the needs of hole reaming, and achieve drilling problems in complex formations, ensuring accuracy and Safe, Adaptable Effects

Active Publication Date: 2019-06-28
浙江化工工程地质勘察院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the height of the above-mentioned rotary drilling bit is extended relative to the diameter of the bottom, during the process of digging and advancing the rotary drilling bit, the advancing direction of the drill bit can be adjusted conveniently by adjusting the position of the upper part of the drilling body, so that the rotary drilling bit is in progress. Reduce the offset range of the drilling direction during secondary excavation, but when drilling, when the load-bearing area needs to be increased, it cannot meet the work needs of reaming

Method used

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  • A kind of drilling tool and drilling method
  • A kind of drilling tool and drilling method
  • A kind of drilling tool and drilling method

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Embodiment one, a kind of drilling tool, such as figure 1 , is arranged on the pile driver 15, and is driven by the pile driver 15 to carry out the drilling work.

[0044] like figure 2 , the drilling tool includes a drilling tool body 1, a casing 2 and a pipe shoe 3, wherein the drilling tool body 1 includes a central drill bit 4, an eccentric drill bit 5 and a straightener 6, and the eccentric drill bit 5 is arranged between the straightener 6 and the center Between the drill bits 4 , the guide 6 is arranged in the pipe shoe 3 , and the top end of the pipe shoe 3 is connected with the casing 2 .

[0045] like image 3 The bottoms of the central drill bit 4 and the eccentric drill bit 5 are respectively provided with drill teeth 14, and a number of drill teeth 14 are arranged at equal intervals along the circumferential direction of the central drill bit 4 and the eccentric drill bit 5. Two-stage rock breaking is adopted, and the eccentric drill bit 5 realizes the e...

Embodiment 2

[0053] Embodiment two: a drilling method, comprising the following steps:

[0054] Step 1: Measure and stake out, determine the depth and diameter of the borehole according to the geological conditions revealed by the design drawings and engineering geological reports, and mark the center point according to the center of the borehole after leveling the site;

[0055] Step 2: manufacture prefabricated holes, and use pile driver 15 to drill down along the center point on the foundation according to the design elevation and aperture;

[0056] Step 3: After drilling, first blow off the residue at the bottom of the hole, disengage the rotary power of the center drilling tool, stop the rotation, and slowly lift the center drilling tool until the back of the eccentric drill bit 5 contacts the front end of the casing 2 shoe, and use a pipe wrench Hold the drill pipe, turn it counterclockwise, and slowly try to lift the center drilling tool at the same time;

[0057] Step 4: Reaming, ...

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Abstract

The invention discloses a hole drilling tool and method. The hole drilling tool comprises a drilling tool body, a casing pipe and a pipe boot. The drilling tool body comprises a center drill bit, an eccentric drill bit and a centralizer. The eccentric drill bit is arranged between the centralizer and the center drill bit, the centralizer is arranged in the pipe boot, the top end of the pipe boot is connected with the casing pipe, the centralizer is connected with the eccentric drill it through an eccentric shaft, and a locking mechanism is arranged between the centralizer and the center drillbit. According to the hole drilling tool, good reliability of connection between the center drill bit and the centralizer is ensured, and the problem of falling of the drilling tool is thoroughly solved.

Description

technical field [0001] The invention relates to the technical field of drilling, more specifically, it relates to a drilling tool and a drilling method. Background technique [0002] The current drilling method generally uses a crane to insert the internal drilling equipment into the casing set in the soil. When encountering the geological conditions of hard soil such as sand and gravel, the penetration ability is low and the construction efficiency is slow. The drill bit of the drilling equipment will generate huge stress concentration during the drilling process, and the drilling equipment will inevitably be twisted, resulting in splitting and cracking of the casing, which will seriously damage the building under long-term pressure. affect the safety of building structures. [0003] In the prior art, the Chinese patent with the authorized notification number CN204082008U discloses a rotary drilling bit, which includes a cylindrical drill body, and the ratio of the height ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/02E21B7/04E21B7/10
CPCE21B7/02E21B7/04E21B7/10
Inventor 刘礼峰王威
Owner 浙江化工工程地质勘察院有限公司
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