Drill pipe removal device and drill pipe removal process for anti-sand and water-freezing pipes in subway tunnel construction

A technology for tunnel construction and water freezing, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc. It can solve problems that affect the smooth progress of construction, sand inrush and water leakage, etc., so as to improve construction efficiency and ensure sealing sexual effect

Active Publication Date: 2022-08-05
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, before the PVC pipe is used as a frozen pipe, it is often necessary to drill holes in advance with a drill pipe, and after the drilling is completed, the drill pipe needs to be pulled out, and it is relatively easy to cause sand and water in the process of pulling out the drill pipe. The problem of smooth progress of construction, especially when encountering sandy soil layers, will seriously affect the smooth progress of construction

Method used

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  • Drill pipe removal device and drill pipe removal process for anti-sand and water-freezing pipes in subway tunnel construction
  • Drill pipe removal device and drill pipe removal process for anti-sand and water-freezing pipes in subway tunnel construction
  • Drill pipe removal device and drill pipe removal process for anti-sand and water-freezing pipes in subway tunnel construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Drill pipe extraction device for anti-sand and water-freezing pipes in subway tunnel construction, such as Figure 4 and Figure 5 As shown, it includes a sealing mechanism 3, a pulling rod mechanism and a driving mechanism;

[0041] The sealing mechanism 3 includes a rubber plug 14 and a flange 15, there are two flanges 15, the rubber plug 14 is fixedly installed between the two flanges 15, and the rubber plug 14 and the flange 15 are fixedly installed together to form a flange rubber seal The diameter of the flange 15 is matched with the inner diameter of the drill pipe 1 to be removed so that the flange 15 is matched with the inner wall of the drill pipe 1 to be removed; the flange rubber seal is fixedly installed at the nozzle of the drill pipe 1 to be removed , and cooperates with the sealing between the inner wall of the drill rod 1 to be pulled out; the outer end face of the flange rubber seal is movably connected with the hydraulic cylinder 4 of the rod pulling...

Embodiment 2

[0048] Drill pipe extraction device for anti-sand and water-freezing pipes in subway tunnel construction, such as Image 6 As shown, it includes a sealing mechanism 3, a pulling rod mechanism and a driving mechanism;

[0049] The sealing mechanism 3 includes a rubber plug 14 and a flange 15, there are two flanges 15, the rubber plug 14 is fixedly installed between the two flanges 15, and the rubber plug 14 and the flange 15 are fixedly installed together to form a flange rubber seal The diameter of the flange 15 is matched with the inner diameter of the drill pipe 1 to be removed so that the flange 15 is matched with the inner wall of the drill pipe 1 to be removed; the flange rubber seal is fixedly installed at the nozzle of the drill pipe 1 to be removed, and Sealing cooperation with the inner wall of the drill rod 1 to be pulled out; the outer end face of the flange rubber seal is vertically connected with the support rod 11 of the rod pulling mechanism;

[0050] The pull-...

Embodiment 3

[0055] The process of pulling out the drill pipe of the freezing pipe for preventing sand gushing and water escaping during subway tunnel construction includes the following steps:

[0056] Step A: The drilling is completed; the length of each section of the drill pipe used is 1.5 meters, and the drill pipe and the drill bit 9 are connected by the thread 20, see figure 1 ;

[0057] Step B: After the drilling is completed, insert the screw unloading rod 22 and fix it relatively through the clamping groove 21, rotate the screw unloading rod 22, unscrew the drill bit 9 and the drill rod 1 to be pulled out, and disconnect the thread 20, see figure 2 ;

[0058] Step C: Insert the no-extraction tube 2 into the cavity of the drill pipe and extend into the bottom of the drilled hole, see image 3 ;

[0059] Step D: The drill pipe 1 to be pulled out is pulled out of the drilled hole by using the drill pipe pulling device for preventing sand gushing and water freezing in the subway ...

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Abstract

The invention discloses a drill pipe extraction device and a drill pipe extraction process for an anti-sand, water, and freezing pipe in subway tunnel construction, a sealing mechanism, a rod pulling mechanism and a driving mechanism; the rod pulling mechanism includes the support part and the pulling rod part; a sealing mechanism It is fixedly installed at the mouth of the drill pipe to be removed, and the non-extraction pipe is sealed in the drill pipe to be removed; The second end of the pulling rod part of the mechanism is drivingly connected to the driving mechanism, and the driving mechanism reciprocates along the pulling direction of the drilling rod to be pulled out, and the maximum distance of the reciprocating motion is greater than or equal to the length of the single section of the drilling rod to be pulled out. The present invention can seal up the drill pipe to be pulled out, the unpulled pipe and the possible occurrence of sand and water in the gap by setting the sealing mechanism, so as to avoid the construction harm caused by the sand and water; Mechanism and extubation mechanism, which can efficiently and quickly pull out the drill pipe from the drilled hole and improve the construction efficiency.

Description

technical field [0001] The invention relates to the technical field of drill pipe pulling. Specifically, it is a drill pipe removal device and a drill pipe removal process for the anti-sand and water freezing pipe in subway tunnel construction. Background technique [0002] The shield method is a commonly used construction method in the construction of urban subway tunnels. When the shield machine enters and exits the tunnel, in order to prevent soil collapse caused by insufficient soil strength at the entrance, soil flooding into the well, and sand and water gushing around the tunnel door. When the accident occurred, the reinforcement of the soil around the tunnel door became an important link in the shield construction process of the subway tunnel. The freezing method has been widely used in coal mines and other projects, and its construction technology has become more and more mature, and it has been gradually applied to the soil reinforcement around the tunnel door of s...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21B23/00E21B33/03
CPCE21B23/00E21B33/03
Inventor孔令辉李方政高伟王磊许舒荣李宁韩玉福丁航张洪波孙佳
OwnerBEIJING CHINA COAL MINE ENG CO LTD