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Drill bits suitable for drilling in silt and fine sand formations below the water table

A groundwater level and silty sand technology, which is applied in the field of drilling, can solve the problems of inability to extract sand and slag at the bottom of the hole, and achieve the effects of convenient assembly and disassembly, ensuring the quality of the hole and reducing the water consumption.

Active Publication Date: 2018-11-30
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems in the prior art that the sand cannot be extracted and the sediment is easy to continue at the bottom of the hole, and to provide a drill bit suitable for drilling in the fine sand formation below the groundwater level

Method used

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  • Drill bits suitable for drilling in silt and fine sand formations below the water table
  • Drill bits suitable for drilling in silt and fine sand formations below the water table

Examples

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0047] 1. Drill bit

[0048] 1. Overall

[0049] Such as figure 1 , the drill bit includes alloy drill teeth 1, connecting cylinder 2, conical shroud 3, spherical overflow valve 4, ball valve 5 and drill cylinder 6;

[0050] Its location and connection relationship are:

[0051] From bottom to top, the alloy drill tooth 1, the connecting cylinder 2 and the drill cylinder 6 are sequentially connected to form the main structure;

[0052] On the top of the connecting cylinder 2, a cone-shaped shroud 3 and a spherical overflow valve 4 are sequentially arranged, and a ball valve 5 is arranged inside the spherical overflow valve 4.

[0053] 2. Functional components

[0054] 01) Alloy drill tooth 1

[0055] The alloy drill tooth 1 is a circle in which the drill teeth made of alloy material are evenly distributed;

[0056] It is arranged on the bottom surface of the connecting cylinder 2,...

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Abstract

The invention discloses a drill suitable for drilling in a silty-fine sand stratum below the underground water level, and relates to the well drilling technology in engineering investigation. The drill comprises alloy drill teeth (1), a connecting barrel (2), a conical fairing (3), a spherical overflow valve (4), a ball valve (5) and a drill barrel (6). The drill teeth (1), the connecting barrel (2) and the drill barrel (6) are sequentially connected from bottom to top to form a main body structure. The conical fairing (3) and the spherical overflow valve (4) are sequentially arranged at the top of the connecting barrel (2). The ball valve (5) is arranged in the spherical overflow valve (4). A drilling method includes the steps of (1) assembling, (2) cutting, (3) slurry collecting and (4) drill lifting. When the drill drills in the silty-fine sand stratum below the underground water level, silty-fine sand can be effectively extracted, sediment is prevented from forming at the bottom of a drill hole, the expected drilling depth is achieved, and the hole forming quality is guaranteed. Meanwhile, the drill can realize multiple times of industrial copying.

Description

technical field [0001] The invention relates to the drilling technology in engineering survey, in particular to a drill bit suitable for drilling in fine sand formations below the groundwater level. Background technique [0002] In engineering investigation, it is necessary to use drilling technology to explore the formation. The formation drilling is obtained by drilling with a drilling rig, and in-situ testing and geophysical logging are carried out in the drilling to obtain formation information within the depth of the drilling and provide reference for engineering construction and resource development. [0003] At present, geological drilling technology at home and abroad tends to be mature, and drilling equipment is relatively complete. Capable of drilling in a variety of geological conditions. When carrying out drilling work in sandy soil formations, it is more common to inject high-pressure water from the drill pipe, and at the same time use the drill bit to cut the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B27/00E21B27/02E21B34/08
CPCE21B27/00E21B27/02E21B34/08E21B2200/04
Inventor 刘海峰朱长歧李小刚崔翔孟庆山
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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