Unlock instant, AI-driven research and patent intelligence for your innovation.

Rope coring method suitable for pneumatic down-the-hole hammer

A rope coring and down-the-hole hammer technology can be used in earth-moving drilling, undisturbed core extraction, construction, etc. controllable effect

Active Publication Date: 2021-06-11
CHINA RAILWAY CONSTR HEAVY IND
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a rope coring method suitable for a pneumatic down-the-hole hammer to solve the problem of low coring efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rope coring method suitable for pneumatic down-the-hole hammer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see figure 1 , a rope coring method adapted to a pneumatic down-the-hole hammer, comprising the following steps:

[0030] Step 1: The coring device is fed in; the steel wire rope 2 connected to the winch passes through the rotary joint 3, and is connected to the coring device 5, and the coring device 5 is placed in the drill pipe 4 at the hole, and the rotary joint 3 is screwed. To the drill pipe 4, enter compressed air from the rotary joint, push the coring device 5 forward, adjust the back pressure of the hydraulic motor of the winch 1 or the motor brake, keep the wire rope 2 tensioned, and measure the length of the wire rope 2;

[0031] The hoist 1 is an intelligent hoist, driven by a hydraulic motor or an electric motor; the hoisting force of the hoist and the passive pull-out resistance of the wire rope are continuously adjustable. In this embodiment, the hydraulic motor is driven, and the hoisting force and the passive pull-out resistance of the wire rope are con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a rope coring method suitable for a pneumatic down-the-hole hammer. The rope coring method comprises the following steps that a steel wire rope connected to a winch penetrates through a rotary joint and is connected to a coring device, the rotary joint is screwed to a drill rod, compressed air is introduced from the rotary joint, the coring device is pushed to move forwards, and the feeding length of the steel wire rope is measured; the coring device is decelerated until the coring device enters the down-the-hole hammer in a low-speed state, and when the speed of the steel wire rope is 0, that the coring device is in place is indicated; during coring, the compressed air continuously enters the drill rod through the rotary joint, and pressure maintaining is conducted; a small amount of compressed air passes through an annular cavity gap between the outer wall of the coring device and the inner wall of the down-the-hole hammer and reaches a rock breaking surface, and powder slag in the annular cavity is washed away; and the coring device is pulled out, and one coring action is completed. According to the rope coring method, waste gas of the down-the-hole hammer can be prevented from blowing away a rock core; and the small amount of compressed air washes away the powder slag between the annular cavity, the rock core and a rock core tube are protected, and the coring quality is improved.

Description

technical field [0001] The invention relates to the technical field of rope coring for geological exploration, in particular to a rope coring method suitable for a pneumatic down-the-hole hammer. Background technique [0002] At present, the wireline coring speed widely used is slow, and when the formation conditions are good, the average footage is about 20m / day, and the method of diamond bit grinding + flushing liquid cooling slag discharge + flushing liquid transporting coring device is mostly used. Drilling fluid is easy to lose, causing problems such as drill sticking, burning, and rapid wear of seals. At the same time, drilling fluid is easy to disperse and pollute the core, which affects the rate of coring and lithology judgment. Moreover, in water-deficient alpine regions, it is difficult to configure drilling fluid and the cost is high. [0003] There are a small number of pneumatic DTH hammers on the market to impact wireline coring, most of which are vertical cor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/02E21B21/16
CPCE21B25/02E21B21/16
Inventor 刘飞香彭正阳肖前龙张明明文中保于洋王博曾定荣章程
Owner CHINA RAILWAY CONSTR HEAVY IND
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com