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

A real-time early warning method for casing wear risk

A casing and risk technology, applied in the field of real-time early warning of casing wear risk, can solve problems such as casing strength reduction

Active Publication Date: 2021-02-12
SOUTHWEST PETROLEUM UNIV
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a real-time early warning method for casing wear risk, which solves the risk early warning problem faced by the casing wear due to the decrease in strength;

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
  • A real-time early warning method for casing wear risk
  • A real-time early warning method for casing wear risk
  • A real-time early warning method for casing wear risk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0066] Depend on figure 1 and figure 2 Shown: a real-time early warning method for casing wear risk, characterized in that, firstly, the maximum lateral force between the drill pipe joint and the casing is selected by calculation, and the wear time is determined by using the penetration rate equation to obtain the casing wear area and depth; then calculate the remaining internal pressure resistance and residual crushing strength of the casing, and calculate the remaining internal pressure safety factor and the remaining crushing safety factor of the casing. The risk level is divided by the extrusion safety factor; finally, the casing wear condition is determined according to the risk level and a real-time early warning is given; the specific steps are as follows:

[0067] Step 1: Calculate the lateral force between the drill pipe joint and the casing in sections a...

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 belongs to the field of oil and gas well construction safety, and in particular relates to a real-time early warning method for casing wear risk. It is characterized in that: firstly, the maximum lateral force between the drill pipe joint and the casing is selected by calculation, and the wear time is determined by using the drilling speed equation, and the wear area and depth of the casing are obtained; then, the remaining internal pressure resistance strength of the casing is obtained and residual anti-collapse strength, calculate the remaining internal pressure safety factor and residual anti-extrusion safety factor of the casing, and divide the risk level according to the obtained casing residual internal pressure safety factor and residual anti-extrusion safety factor; finally determine the casing according to the risk level Pipe wear and real-time early warning. The advantage of the invention is that: the wear depth of the casing at the position with the greatest wear risk can be calculated according to the wellbore trajectory; the wear amount of the casing in the currently drilled and to-be-drilled wellbore can be pre-evaluated, which is convenient for later casing protection measure.

Description

technical field [0001] The invention belongs to the field of oil and gas well construction safety, and in particular relates to a real-time early warning method for casing wear risk. Background technique [0002] During the drilling process of deep wells, ultra-deep wells, highly deviated wells, and horizontal wells, the problem of casing wear is increasingly exposed. Abrasion can reduce the wall thickness of the casing, and under certain conditions, it can cause deformation or even destruction of the casing, thereby reducing the crush resistance and internal pressure strength of the casing, and reducing the safety factor of the casing against extrusion and compression, so that it cannot be guaranteed Subsequent operation production safety. [0003] At present, the invention patent "An automatic detection system for petroleum casing wear" (application publication number: CN 101603418A) detects the casing wear condition by collecting and analyzing the amount of magnetic wear...

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 Patents(China)
IPC IPC(8): E21B47/00E21B12/02
CPCE21B12/02E21B47/00
Inventor 曾德智张海鑫李皓董宝军喻智明刘冰张恩搏施太和
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