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

Concentric pipe rock debris sucking and crushing device suitable for dual-gradient drilling

A technology of crushing device and concentric pipe, applied in the field of oil drilling, can solve the problems of time-consuming downtime, complicated operation, poor safety, etc., and achieve the effects of increasing displacement, broad development prospects, and reducing drilling costs.

Active Publication Date: 2018-11-30
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a concentric tube cuttings suction and crushing device suitable for dual-gradient drilling, which overcomes the problems of complicated operation, time-consuming drilling stoppage, high cost, and poor safety in the prior art. The concentric tube cuttings suction and crushing device for gradient drilling facilitates cuttings carrying in horizontal wells, reduces the generation of cuttings beds, reduces drilling costs, and provides a guarantee for safe and efficient drilling

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
  • Concentric pipe rock debris sucking and crushing device suitable for dual-gradient drilling
  • Concentric pipe rock debris sucking and crushing device suitable for dual-gradient drilling
  • Concentric pipe rock debris sucking and crushing device suitable for dual-gradient drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0050] Such as Figure 1 to Figure 5 shown, set figure 2 The upstream end shown in is the first end, set figure 2 The downstream end shown in the figure is the second end. The present invention provides a concentric tube cuttings suction and crushing device 100 suitable for dual gradient drilling. The concentric tube cuttings suction and crushing device 100 suitable for dual gradient drilling is provided with a shaft Drilling fluid inflow channel 31 open to both ends, applicable to concentric tube cuttings suction and crushing device 100 for dual-gradient drilling. The second end of the suction and crushing device 100 is provided with the outlet end of the drilling fluid inflow channel 31; the drilling fluid inflow channel 31...

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 concentric pipe rock debris sucking and crushing device suitable for dual-gradient drilling. The device is internally provided with a drilling fluid flowing channel providedwith two open axial ends, wherein the drilling fluid flowing channel is in shunted communication with a drilling fluid flowback channel, the inlet end of the drilling fluid flowback channel is locatedin the device, the outlet end of the drilling fluid flowback channel is provided with a crushing portion, the drilling fluid flowback channel is provided with a first jet flow throat portion and a second jet flow throat portion, and a mixing cavity is formed in the position, located between the first jet flow throat portion and the second jet flow throat portion, of the drilling fluid flowback channel. The device is also internally provided with an annulus drilling fluid upward-returning channel capable of making the device outside and the mixing cavity communicated, and the annulus drillingfluid upward-returning channel and the drilling fluid flowing channel are peripherally arranged in a spaced way. The concentric pipe rock debris sucking and crushing device suitable for dual-gradientdrilling facilitates horizontal drilling rock debris carrying, decreases rock debris beds, reduces the drilling cost and ensures safe and efficient drilling.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a concentric tube cuttings suction and crushing device suitable for dual-gradient drilling. Background technique [0002] As the oil and gas exploration conditions become more and more complex, the drilling complexity is also increasing. Although refined MPD technology has solved some problems, it still cannot meet the problem of multiple pressure systems in the same open hole section. Concentric tube drilling is a dual-gradient drilling technology that can precisely control the bottom hole pressure. It can realize closed-loop circulation of drilling fluid and can solve many limitations of existing conventional drilling technologies. In addition, the RTS system in the concentric tube drilling uses double-walled drill pipes to provide power and data transmission channels downhole, and realizes the wired transmission of data. Therefore, the RTS system is more common in ...

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): E21B21/00B02C19/06
CPCB02C19/06E21B21/00
Inventor 李军黄涛张辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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