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

Efficient rock breaking PDC drill bit

A drill bit and rock-breaking technology, which is applied in the field of high-efficiency rock-breaking PDC drill bits, can solve the problems of affecting the discharge of cuttings, weakening the service life of the impact device, and hindering the migration of cuttings, so as to improve cutting efficiency, increase service life, and prevent impact. The effect of corrosion failure

Pending Publication Date: 2021-01-26
刘伟
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In modern rapid drilling technology, while the drill bit has good rock-carrying ability, it is more important to have an excellent rock-breaking cutting structure, especially when drilling into hard-to-drill formations such as strong abrasiveness and high hardness. Strong and high hardness, the cutting teeth of the conventional PDC bit often suffer from tooth wear and chipping during the drilling process, especially the cutting teeth on the shoulder of the drill bit, the wear speed is faster, when a tooth on the drill bit When wear occurs, it will increase the drill pressure of the teeth in the adjacent area of ​​the tooth, greatly increase the working load of the cutting teeth in the adjacent area, and then accelerate the rapid wear of the cutting teeth in the adjacent area. When the cutting teeth wear to a certain extent, the It will cause the failure of the cutting teeth on the blade, resulting in a rapid reduction in its service life and greatly reducing the drilling efficiency of the drill bit
[0004] In order to improve the service life of the cutting teeth during the drilling process of the drill bit and increase the intrusion ability of the drill bit into the rock, more and more drill bit manufacturers and research institutes at home and abroad use the impactor with the drill bit to exert a certain force on the bit through the impactor. The pressure of the rock increases the force of the rock, and the rock reduces the stress of the nearby area under greater pressure, thereby increasing the cutting ability of the cutting teeth. However, in the impactor installed on the existing impact drill bit, the impact device is exposed In the bottom of the well, on the one hand, this will cause the drilling fluid to erode the percussion device and reduce the service life of the percussion device; , affecting the discharge of cuttings, causing cuttings to accumulate at the bottom of the well, resulting in mud bags, which greatly reduce the drilling efficiency of the drill bit

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
  • Efficient rock breaking PDC drill bit
  • Efficient rock breaking PDC drill bit
  • Efficient rock breaking PDC drill bit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] An embodiment of the present invention provides a high-efficiency rock-breaking PDC drill bit. see figure 1 , 2 , including a bit body 1, extending from the bit body 1 or several blades 2 fixed on the bit body 1, the blade cloth tooth surface 210 is provided with cutting teeth 21, and the drilling fluid is between adjacent blades 2 The flow channel 3 is characterized in that: at least one blade 2 on the drill body 1 is provided with an impact assembly 7, and the impact assembly 7 is composed of an impact device 71, a rolling device 72, and a transmission device 74; The rolling groove 6 is provided, and the impact device 71 rotates with the transmission device 74, and enters into the rolling groove 6 under the action of the matching roller 75; the exposed height of the impact tooth 711 of the impact device 71 is higher than that of the knife The exposed height of the cutting teeth 21 on the wing 2, the height difference is Δh; the impact action of the impact device 71 ...

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 an efficient rock breaking PDC drill bit, and belongs to the technical field of oil and gas drilling. The drill bit comprises a drill bit body and blades extending from the drill bit body or fixed on the drill bit body, wherein cutting teeth are arranged on tooth surfaces of the blades, drilling fluid flow passages are formed between two adjacent blades, an impact componentis arranged on at least one blade on the drill bit body, rolling grooves are formed in the blades, impact devices rotate along with transmission devices and enter the rolling grooves under the actionof the matched rolling bodies, and the transmission mode of the impact devices is belt transmission. According to the efficient rock breaking PDC drill bit, the structure can carry out impact pre-crushing or pre-damage on rock, and the strength of the rock is reduced; and the matched rolling bodies enter the rolling grooves and then retract into the cutter blade bodies to be not exposed to the bottom of a well, the impact devices can be prevented from being eroded, the impact devices can be completely protected through belt transmission, the situation that the impact devices lose efficacy dueto overlarge loads is avoided, the service life of the impact devices is prolonged, and the drilling efficiency of the drill bit is improved.

Description

technical field [0001] The invention belongs to the technical fields of drilling such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, hydrology, etc., and particularly relates to a high-efficiency rock-breaking PDC drill bit. Background technique [0002] The drill bit is a rock-breaking tool used in drilling engineering to break rock and form a wellbore. The PDC bit is one of the commonly used drill tools in drilling engineering. Especially in the modern rapid drilling process, the footage obtained by the PDC bit has reached more than 90% of the total footage of oil and gas drilling. The PDC bit relies on mechanical drilling during the drilling process. It has been widely used in oil and gas drilling due to its advantages of high speed, low drilling cost and long service life. [0003] In modern rapid drilling technology, while the drill bit has good rock-carrying ability, it is more important to have an excellent ro...

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): E21B10/36E21B10/38
CPCE21B10/36E21B10/38
Inventor 刘伟其他发明人请求不公开姓名
Owner 刘伟
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