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

Balling-resistant PDC (polycrystalline diamond compact) drill bit with pits in surfaces of flow passages

A technology for pits and drill bits, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., to achieve the effects of preventing adhesion, improving drilling efficiency, and reducing drilling costs

Active Publication Date: 2014-02-26
SOUTHWEST PETROLEUM UNIV +2
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, provide a kind of anti-balling PDC drill bit with dimples on the surface of the flow channel, solve the problem of balling of the PDC bit, improve drilling efficiency, and reduce drilling costs

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
  • Balling-resistant PDC (polycrystalline diamond compact) drill bit with pits in surfaces of flow passages
  • Balling-resistant PDC (polycrystalline diamond compact) drill bit with pits in surfaces of flow passages
  • Balling-resistant PDC (polycrystalline diamond compact) drill bit with pits in surfaces of flow passages

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see Figure 1 to Figure 4As shown, a kind of anti-mud bag PDC drill bit with dimples on the surface of the flow channel includes a drill body 1. The lower part of the drill body 1 is provided with a threaded joint 2 for connecting the drill pipe, and the upper part is provided with several blades 3. Between the blades 3 The groove between them forms the runner groove 4 of the drill bit. The surface of the runner groove 4 is provided with at least two pits 5. The pit 5 is composed of a pit bottom 51 and a pit side 52. The pit bottom 51 It extends directly from the bottom of the pit to the surface of the runner groove 4 . The slope angle α of the bottom surface 51 of the pit ≤ 40°; the ratio of the projected area S1 of the side surface 52 of the pit to the original surface of the runner groove 4 and the projected area S2 of the bottom surface 51 of the pit to the original surface of the runner groove 4 is equal to The range is S1:S2≤1:3. The angle between the bottom sur...

Embodiment 2

[0045] see image 3 with Figure 4 , The difference between this embodiment and Embodiment 1 is that the depth c of the pit 5 is 0.3-5 mm, and the length d≥2 mm.

[0046] This range of depth and length of the pit 5 is the easiest to process. If the length and depth of the pit 5 are too small, the processing difficulty will be very great.

[0047] It should be explained that the so-called length of the pit 5 refers to the largest profile dimension in the transverse or longitudinal direction of the pit.

Embodiment 3

[0049] see Figure 5 The difference between this embodiment and the first embodiment is that the adjacent dimples 5 on the runner groove 4 intersect. Small cuttings adhesion and anti-mudbag effect.

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 discloses a balling-resistant PDC (polycrystalline diamond compact) drill bit with pits in the surfaces of flow passages. The balling-resistant PDC drill bit comprises a drill bit body, the lower portion of the drill bit body is provided with a screwed joint connected with a drill rod, the upper portion of the drill bit body is provided with a plurality of blades, grooves between the blades form flow passage grooves of the drill bit, at least two pits are formed in the surface of each flow passage groove, and the bottom surface of each pit extends upwards from the deepest position of the pit bottom to the inclined plane of the surface of the corresponding flow passage groove. By the balling-resistant PDC drill bit, adhesion tendency of rock debris in the flow passage grooves is reduced obviously, and the flow passages are prevented from being blocked to achieve the purpose of resisting balling, so that drilling efficiency of the drill bit is improved, service life of the drill bit is prolonged, and drilling cost is lowered.

Description

technical field [0001] The invention belongs to the technical fields of drilling equipment such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, and hydrology, and in particular relates to a mud-packing-resistant PDC drill bit with pits on the surface of the flow channel. Background technique [0002] PDC bit is a kind of drill bit that uses polycrystalline diamond composite sheet (that is, PDC tooth, also referred to as cutting tooth or tooth) to scrape or shear rock. It is one of the main rock-breaking tools used in drilling engineering today. , especially in the drilling of medium and soft formations, PDC bits are used the most. In order to make the cutting structure and hydraulic structure of the drill bit achieve better working results, when designing and manufacturing the drill bit, the PDC teeth are usually divided into several groups according to certain rules, and the PDC teeth of the same group are consolidate...

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): E21B10/46
Inventor 林敏杨迎新陈炼曾力哲徐强任海涛周谧包泽军周春晓
Owner SOUTHWEST PETROLEUM UNIV
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