PDC (Polycrystalline Diamond Compact) drilling head with dynamic stress interference principle

A dynamic stress, drill bit technology, applied in mining engineering, oil and gas drilling engineering, tunnel engineering, geological drilling fields, can solve the problems of short working life of the drill bit, low rock breaking efficiency, poor penetration ability of PDC teeth, etc.

Pending Publication Date: 2020-06-16
SOUTHWEST PETROLEUM UNIV +1
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a PDC drill bit with the principle of dynamic stress interference to solve the problems existing in the prior

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
  • PDC (Polycrystalline Diamond Compact) drilling head with dynamic stress interference principle
  • PDC (Polycrystalline Diamond Compact) drilling head with dynamic stress interference principle
  • PDC (Polycrystalline Diamond Compact) drilling head with dynamic stress interference principle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] see Figure 1-Figure 6 , the embodiment of the present invention provides a PDC drill bit 1 with the principle of dynamic stress interference. The PDC drill bit includes a drill body 1 and at least two blades 2. The blades 2 are fixedly connected to or integrally formed with the drill body 1. The drill bit 1 is provided with a mixed cutting unit 3 composed of PDC teeth 21 and impact teeth 22. , the PDC teeth 21 and the impact teeth 22 in the hybrid cutting unit 3 are respectively arranged on two adjacent blades 2; the impact teeth 22 can produce impact motion; in the hybrid cutting unit 3, the PDC teeth 21 and the impact teeth 22 The positional relationship is configured such that in the circumferential direction formed by the rotation of the drill bit 1, the PDC teeth 21 are arranged behind the impact teeth 22, and the range of the distance D between the PDC teeth 21 and the impact teeth 22 is: 4d≥D≥d, d is the diameter of the PDC tooth.

[0032] The tooth form of im...

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 PDC drilling head with a dynamic stress interference principle. The PDC drilling head comprises a drilling head body and at least two cutter wings, wherein the cutter wings and the drilling head body are fixedly connected or are molded integrally, the drilling head is provided with mixed cutting units composed of PDC teeth and impact teeth, the PDC teeth and the impact teeth in the mixed cutting units are arranged on two adjacent cutter wings correspondingly, the impact teeth can generate impact motions, in the mixed cutting units, the positional relation between the PDC teeth and the impact teeth is constructed to be in the peripheral direction formed by drilling head rotating, the PDC teeth are arranged behind the impact teeth, furthermore, the range of the distance D between the PDC teeth and the impact teeth is that the D is larger than or equal to d and less than or equal to 4d, and the d is the diameter of the PDC teeth. By means of the PDC drilling headwith the dynamic stress interference principle, the problems of the poor cutting tooth intrusion ability, the low rock breaking efficiency and the short drilling head working life in hard formation drilling of the drilling head can be solved.

Description

technical field [0001] The invention relates to technical fields such as petroleum and natural gas drilling engineering, mining engineering, geological drilling, tunnel engineering, etc., and specifically relates to a PDC drill bit with the principle of dynamic stress interference. Background technique [0002] The drill bit is a tool that directly contacts the rock during the drilling process and breaks the rock through cutting and impacting. PDC (Polycrystalline Diamond Compact) drill bits, as an important type of existing drill bit technology, are more and more widely used in oil drilling, geology and even construction engineering. The PDC bit is used to break the rock mainly by cutting through the PDC teeth set on the bit. In soft to medium hard formations, it can obtain ideal drilling speed and has been widely used in oil and gas drilling. [0003] With the exhaustion of shallow oil and gas resources, the focus of oil and gas exploration and development has gradually s...

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): E21B10/42E21B10/43E21B10/36
CPCE21B10/36E21B10/42E21B10/43
Inventor 张春亮杨迎新包泽军
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap