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Protective device used for karst cave and water-based channel drilling method adopting same

A technology of protective devices and karst caves, which is applied in the field of exploration engineering, can solve the problems of time-consuming, buried in the ground, and cost, etc., and achieve the effects of simplified overall structure, stable burial, and convenient installation

Active Publication Date: 2016-01-06
CHINESE NONFERROUS METAL SURVEY & DESIGN INSTITUE OF CHANGSHA
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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 used for karst cave and water-based channel drilling method adopting same
  • Protective device used for karst cave and water-based channel drilling method adopting same
  • Protective device used for karst cave and water-based channel drilling method adopting same

Examples

Experimental program
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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 invention firstly aims to provide a protective device used for a karst cave. The protective device comprises a sleeve, a sleeve connector and a sleeve blade leg. A first external thread and a first internal thread are arranged on the sleeve, a second internal thread is arranged on the inner wall of the lower end of the sleeve connector, and the outer wall of the lower end of the sleeve connector is of a first cone-frustum-shaped structure wide in upper portion and narrow in lower portion. A second external thread is arranged on the outer wall of the upper end of the sleeve blade leg, and the outer wall of the lower end of the sleeve blade leg is of a second cone-frustum-shaped structure wide in upper portion and narrow in lower portion. The overall structure is simple, the sleeve, the sleeve connector and the sleeve blade leg are in threaded connection, and installing is convenient. The cone-frustum-shaped structure on the sleeve connector facilitates broaching. The cone-frustum-shaped structure on the sleeve blade leg facilitates perforation of non-karst-cave filling, and therefore the protective device used for the whole karst cave is stably buried and is high in practicability. The invention secondly aims to provide a water-based channel drilling method. Operation is convenient, the drilling cost is lowered, and time consumed for sleeve burying and cutoff is shortened.

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 Applications(China)
IPC IPC(8): E21B17/00E21B17/08E21B17/042E21B7/20
Inventor 齐运来叶水先姚平李晖杨志飞
Owner CHINESE NONFERROUS METAL SURVEY & DESIGN INSTITUE OF CHANGSHA
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