Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Underreaming drill bit

A technology for bottom-enlarging drill bits and drill pipes, which is applied in drill bits, drilling equipment, earth-moving drilling, etc., and can solve the problems that the blades are easy to slip off the drill pipe and fall off.

Pending Publication Date: 2021-01-26
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a bottom reaming drill bit to solve the technical problem of avoiding the blade from slipping off the drill pipe and falling when not in use

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
  • Underreaming drill bit
  • Underreaming drill bit
  • Underreaming drill bit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present application.

[0028] The specific technical features in each embodiment described in the specific implementation modes can be combined in various ways if there is no contradiction. For example, different implementation modes can be formed by combining different specific technical features. Necessary repetition, various possible combinations of specific technical features in this application will not be further described.

[0029] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that there are similarities or connect...

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 relates to the field of underreaming drill bits. A underreaming drill bit comprises a drill rod, a blade and a pushing piece, the drill rod is provided with an axial groove and a slidinggroove, at least part of the blade is arranged in the sliding groove and moves along the sliding groove so as to protrude out of or retract into the drill rod, the pushing piece is arranged below theblade, and the pushing piece is connected with the drill rod in a sliding mode so that the pushing piece can move along the axial groove. A first guide part is arranged on the blade, a second guide part is arranged on the drill rod, the blade and the drill rod limit displacement of the blade protruding out of the drill rod through matching of the first guide part and the second guide part, so that the blade cannot be completely separated from the drill rod, and the blade is prevented from sliding out and falling off in a non-working state.

Description

technical field [0001] The present application relates to the field of reaming tools, in particular to a reaming drill bit. Background technique [0002] The post-concrete anchorage technology has been widely used in many engineering fields due to its advantages of economy, quickness, and ease of construction. The post-anchor technology refers to the anchorage on the existing concrete structure through related means, including mechanical anchor bolts, chemical anchor bolts, chemical planting bars, etc., among which, the mechanical anchor bolts are made by slotting and reaming at the bottom of concrete drilling holes and anchoring The mechanical interlock between the expansion heads of the rods is used to realize the anchoring of the structural fixtures, and the grooving and reaming needs to be completed by a special bottom reaming drill. [0003] Relevant bottom reaming drills generally use the transmission mode of gears and racks to realize the expansion and contraction of...

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
IPC IPC(8): E21B10/32E21B7/28
CPCE21B7/28E21B10/32
Inventor 张雄倪文兵贾嵘徐永浩朱立强吕彬
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com