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Trenchless Reamer

A reamer and trenchless technology, which is used in drilling equipment, earthwork drilling, drill bits, etc., can solve the problems of general hole wall reinforcement effect and offset of reamer.

Active Publication Date: 2017-09-15
BEIJING DONGFANG BOXUN TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reamer of this structure is also prone to offset by the influence of external forces; and the reinforcement effect on the hole wall is general

Method used

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  • Trenchless Reamer
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  • Trenchless Reamer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] refer to Figure 1 to Figure 4 The embodiments of the present invention will be further described.

[0033] refer to figure 1 , a non-excavation reamer, its reamer body 1 is divided into a guide casting part 2 and a reinforcement smoothing part 3. The guide pouring part 2 and the reinforcement smoothing part 3 are integrally manufactured; the front end of the guide pouring part 2 is a conical body, and its outer surface is a reaming guide working surface 4; the rear end of the guide pouring part 2 is a cylinder, and its outer surface It is pouring face 5. The reinforcement smoothing part 3 is fixed on the rear end part of the guide pouring part 2 .

[0034] The pouring channel 8 is arranged inside the guide pouring part 2; the pouring channel 8 communicates with the pouring hole 9 on the reaming guide working surface 4 and the pouring working surface 5. Wherein, the aperture diameter of the pouring hole 9 of the reaming guide working surface 4 is smaller than the ap...

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PUM

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Abstract

The invention discloses a non-excavation reamer. The main body of the reamer includes a guide pouring part. The surface of the guide pouring part is provided with a reaming guide working surface and a pouring work surface, and a pouring hole communicating with the surface of the guide pouring part is arranged inside. The pouring channel; the reaming guide working surface and the pouring working surface are provided with a number of breaking points along the axial direction of the reamer body. A clockwise helical segment rotating in a clockwise direction and a counterclockwise helical segment rotating in a counterclockwise direction, and the clockwise helical segment and the counterclockwise helical segment are arranged alternately. It is not easy to be affected by external forces to expand the hole when expanding the hole; the hole wall is reinforced to make the hole not easy to collapse.

Description

technical field [0001] The invention relates to the technical field of drilling tools, more specifically, it relates to a non-excavation reamer. Background technique [0002] With the development of pipeline transportation of fluid media, the drilling and reaming operations of pipeline holes crossing rivers, lakes, highways, railways and even mountains are gradually increasing, and the use of crossing reamers is becoming more and more frequent. [0003] Borehole commonly used for drilling and reaming soft formations in trenchless horizontal directional drilling pipelay [0004] Reamer: The joint at the left end of the reamer is threadedly connected to the drill pipe of the drilling rig, and there is a water hole in the joint that communicates with the waterway of the reamer body. The reamer body is composed of a baffle plate, an outer shell and an inner shell. The outer shell is inlaid with several cutting tools and has water holes. The joint is welded to the mandrel and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/26E21B10/60
Inventor 李春龙
Owner BEIJING DONGFANG BOXUN TECH DEV CO LTD