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Protective device for karst cave and waterway drilling method using the protective device

A protection device and karst cave technology, which is applied in the field of exploration engineering, can solve the problems of taking a long time, cannot be taken out, and buried in the stratum, and achieves the effect of simplified overall structure, strong practicability, and stable burial.

Active Publication Date: 2018-03-16
CHINA NONFERROUS METAL CHANGSHA SURVEY & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When waterway drilling encounters karst caves in deep formations, the usual method is to spend a lot of time burying the casing to the location of the karst cave. After the drilling work is completed, the casing cannot be pulled out. The casing at this distance to the water surface needs to be cut and pulled out at a cost because it affects the passage of the waterway. The casing at this distance to the bottom of the cave will be buried in the ground and cannot be removed

Method used

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  • Protective device for karst cave and waterway drilling method using the protective device
  • Protective device for karst cave and waterway drilling method using the protective device
  • Protective device for karst cave and waterway drilling method using the protective device

Examples

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Effect test

Embodiment 1

[0041] see figure 1 as well as figure 2 , a protective device for a cave, comprising a group of protective single pieces, the protective single piece includes a casing 1, a casing joint 2 arranged at the upper end of the casing 1 and connected to a drill pipe 7 through a casing adapter 4, and The sleeve blade 3 provided at the lower end of the sleeve 1, the sleeve joint 2 and the sleeve blade 3 both have a first through hole having the same inner diameter as the sleeve 1 and concentric with the central axis.

[0042] The outer wall of the upper end of the casing 1 is provided with a first external thread 11, and the inner wall of the lower end is provided with a first internal thread 12; along the vertical direction, the length of the casing 1 is 8%-20% larger than the height of the cave. %.

[0043] The outer wall of the upper end of the casing blade foot 3 is provided with a second external thread 31 that matches the first internal thread 12, and the outer wall of the low...

Embodiment 2

[0059] A protective device for karst caves, comprising a first set of protective single pieces and a second set of protective single pieces one size smaller than the first set of protective single pieces, the second set of protective single pieces can be obtained from the first set of protective single pieces completely through. The structure of the first group of protective individual pieces and the second group of protective individual pieces is the same as that of the protective individual piece in Embodiment 1.

[0060] The above-mentioned protective device for karst caves is applied to the water drilling process of the channel with two layers of karst caves. For the schematic diagram of the protective device for karst caves in this embodiment used for drilling, see image 3 .

[0061] The specific construction method includes the following steps:

[0062] Step 1: according to the conventional water drilling method, embed the large-diameter perforated pipe casing 5 from ...

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Abstract

The first object of the present invention is to provide a protective device for karst caves, including a casing, a casing joint and a casing blade foot, the casing is provided with a first external thread and a first internal thread; There is a second internal thread, and the outer wall at the lower end is a first conical structure with a wide top and a narrow bottom; a second external thread is provided on the outer wall at the upper end of the casing blade foot, and the outer wall at the lower end is a second round structure with a wide top and a narrow bottom. Conical structure. The overall structure is simplified; the casing, the casing joint and the casing blade foot are threadedly connected, which is convenient for installation; the truncated circular structure on the casing joint is convenient for reaming; It is convenient to penetrate the non-rock cave filling, so that the protective device for the entire cave can be buried more smoothly and has strong practicability. The second object of the present invention is to provide a waterway drilling method, which is easy to operate and saves drilling costs and the time required for casing embedment and casing removal.

Description

technical field [0001] The invention relates to the technical field of exploration engineering, in particular to a protective device for karst caves and a waterway drilling method using the protective device. Background technique [0002] Drilling is an engineering construction measure that uses machinery and equipment to drill holes from the surface to the ground to meet preset requirements. Drilling methods in the prior art are as follows: [0003] Application number is that the patent application of 02807756.3 discloses a kind of drilling method that carries out with a drilling equipment, and this equipment has a drilling device, and this device comprises a casing part and a drilling assembly, and there is the first hole that drills center hole usefulness in its drilling head. A drilling tool and a second drilling tool for reaming the central bore of the housing part and a flushing flow configuration for flushing generated waste debris. At least in drilling situations t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00E21B17/08E21B17/042E21B7/20
Inventor 齐运来叶水先姚平李晖杨志飞
Owner CHINA NONFERROUS METAL CHANGSHA SURVEY & DESIGN INST CO LTD
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