Controlled failure design of drillstring threaded connections

M. J. Knight, F. P. Brennan, W. D. Dover

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The threaded connection of the type used in hydrocarbon exploration is a critical component of the drillstring that is highly susceptible to fatigue damage. Fatigue crack growth can either lead to a catastrophic failure of the connection, known as a twist-off, or can be a non-critical failure, known as a wash-out. The design philosophy of Controlled Failure Design has been used in order to promote a 'friendly' non-critical failure in the connection, by the controlled application of compressive residual stresses. The influence of compressive residual stress and its effect on controlling fatigue crack shape has been experimentally investigated with the development of thread root cold rolling equipment. Through the control of the cold rolling process, it has been demonstrated that fatigue crack growth can be controlled to produce a localized, non-critical failure in the connection.

LanguageEnglish
Pages1081-1090
Number of pages10
JournalFatigue and Fracture of Engineering Materials and Structures
Volume26
Issue number11
DOIs
Publication statusPublished - 30 Nov 2003

Fingerprint

Cold rolling
Fatigue crack propagation
Compressive stress
Residual stresses
Fatigue damage
Hydrocarbons
Fatigue cracks

Keywords

  • control of crack shape
  • drillstring threaded connection
  • residual stress
  • thread root cold rolling

Cite this

@article{7e3ce6dc98434c13acfefdca6a63c9fc,
title = "Controlled failure design of drillstring threaded connections",
abstract = "The threaded connection of the type used in hydrocarbon exploration is a critical component of the drillstring that is highly susceptible to fatigue damage. Fatigue crack growth can either lead to a catastrophic failure of the connection, known as a twist-off, or can be a non-critical failure, known as a wash-out. The design philosophy of Controlled Failure Design has been used in order to promote a 'friendly' non-critical failure in the connection, by the controlled application of compressive residual stresses. The influence of compressive residual stress and its effect on controlling fatigue crack shape has been experimentally investigated with the development of thread root cold rolling equipment. Through the control of the cold rolling process, it has been demonstrated that fatigue crack growth can be controlled to produce a localized, non-critical failure in the connection.",
keywords = "control of crack shape, drillstring threaded connection, residual stress, thread root cold rolling",
author = "Knight, {M. J.} and Brennan, {F. P.} and Dover, {W. D.}",
year = "2003",
month = "11",
day = "30",
doi = "10.1046/j.1460-2695.2003.00697.x",
language = "English",
volume = "26",
pages = "1081--1090",
journal = "Fatigue and Fracture of Engineering Materials and Structures",
issn = "8756-758X",
number = "11",

}

Controlled failure design of drillstring threaded connections. / Knight, M. J.; Brennan, F. P.; Dover, W. D.

In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 26, No. 11, 30.11.2003, p. 1081-1090.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Controlled failure design of drillstring threaded connections

AU - Knight, M. J.

AU - Brennan, F. P.

AU - Dover, W. D.

PY - 2003/11/30

Y1 - 2003/11/30

N2 - The threaded connection of the type used in hydrocarbon exploration is a critical component of the drillstring that is highly susceptible to fatigue damage. Fatigue crack growth can either lead to a catastrophic failure of the connection, known as a twist-off, or can be a non-critical failure, known as a wash-out. The design philosophy of Controlled Failure Design has been used in order to promote a 'friendly' non-critical failure in the connection, by the controlled application of compressive residual stresses. The influence of compressive residual stress and its effect on controlling fatigue crack shape has been experimentally investigated with the development of thread root cold rolling equipment. Through the control of the cold rolling process, it has been demonstrated that fatigue crack growth can be controlled to produce a localized, non-critical failure in the connection.

AB - The threaded connection of the type used in hydrocarbon exploration is a critical component of the drillstring that is highly susceptible to fatigue damage. Fatigue crack growth can either lead to a catastrophic failure of the connection, known as a twist-off, or can be a non-critical failure, known as a wash-out. The design philosophy of Controlled Failure Design has been used in order to promote a 'friendly' non-critical failure in the connection, by the controlled application of compressive residual stresses. The influence of compressive residual stress and its effect on controlling fatigue crack shape has been experimentally investigated with the development of thread root cold rolling equipment. Through the control of the cold rolling process, it has been demonstrated that fatigue crack growth can be controlled to produce a localized, non-critical failure in the connection.

KW - control of crack shape

KW - drillstring threaded connection

KW - residual stress

KW - thread root cold rolling

UR - http://www.scopus.com/inward/record.url?scp=0344896845&partnerID=8YFLogxK

UR - https://onlinelibrary.wiley.com/journal/14602695

U2 - 10.1046/j.1460-2695.2003.00697.x

DO - 10.1046/j.1460-2695.2003.00697.x

M3 - Article

VL - 26

SP - 1081

EP - 1090

JO - Fatigue and Fracture of Engineering Materials and Structures

T2 - Fatigue and Fracture of Engineering Materials and Structures

JF - Fatigue and Fracture of Engineering Materials and Structures

SN - 8756-758X

IS - 11

ER -