Combined drill for drilling with casing

A combined drill bit and casing drilling technology, applied in drill bits, casings, drilling equipment, etc., can solve the problems of limited life of reaming tools, unsynchronized pilot bits, and increased drilling costs, so as to shorten the well construction period and improve the efficiency of drilling. Longevity, the effect of reducing drilling costs

Inactive Publication Date: 2009-03-11
SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited life of reaming tools, during casing drilling, an exchangeable drill tool assembly is often proposed due to the life of reaming tools, which cannot be synchronized with the pilot bit, prolonging the drilling time and increasing the drilling cost

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
  • Combined drill for drilling with casing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The following is based on figure 1 , The present invention is further described.

[0009] Depend on figure 1 As shown, a casing drilling combination drill bit includes a casing string 1 , a casing shoe 3 , a drill plug 4 and a replaceable tool assembly 2 . The casing shoe 3 is connected to the casing string 1 that transmits torque through threads, the drill plug 4 is connected to the replaceable drill assembly 2 in the middle of the casing string through threads, and the casing shoe 3 and the drill plug 4 are positioned by their positioning steps to form a Complete full-face drill bit.

[0010] During the casing drilling process, the combined drill bit is used as an efficient rock breaking tool, the annular casing shoe 3 and the drill bit plug 4 are drilled synchronously and at the same speed, and the casing string 1 is followed up to complete the casing work at the same time. When the drill bit plug 4 fails and needs to be replaced with a new drill bit plug 4 or oth...

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 a casing drilling combined drill which comprises a casing column, a casing shoe, a drill bit plug and a changeable tool assembly. The casing drilling combined drill is characterized in that the casing shoe is connected with the casing column through screw threads, the drill bit plug is connected with the changeable drilling tool assembly through screw threads, and the casing shoe and the drill bit plug form the casing drilling combined drill through the positioning of positioning steps of the casing shoe and the drill bit plug. When the drill bit plug needs changing or other measuring tools are needed to be put into a well during the casing drilling construction, the drill column is not needed to be pulled out just like a conventional drilling process; instead, the changeable drilling tool assembly and the drill bit plug are pulled out of the well top through a cable winch system, and the drilling can be continued after the good changeable assembly and the good drill bit plug are sent in through the cable winch system.

Description

technical field [0001] The invention relates to a casing drilling combination drill bit used in oil and natural gas drilling operations. Background technique [0002] Casing drilling refers to the direct use of casing to replace the traditional drill pipe to transmit mechanical energy and hydraulic energy to the downhole during the drilling process. The downhole drilling tool assembly is connected under the casing string, and the casing is run while drilling. An advanced drilling method in which the casing used for the drill string is left in the well for completion. The new casing drilling combination drill bit drilling technology combines drilling and casing running into one operation process, and the tripping and tripping of the drill bit and downhole tools are carried out in the casing, eliminating the need for conventional tripping operations. The purpose of casing drilling technology is to reduce drilling costs, improve drilling efficiency and minimize wellbore proble...

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): E21B7/20E21B17/14E21B10/62
Inventor 许俊良朱杰然何育光宿振国
Owner SHENGLI PETROLEUM ADMINISTRATION BUREAU DRILLING TECH ACAD SINOPEC
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