Evaluation of a Casing Drilling Connection Subjected to Fatigue and Combined Load Testing

Bailey, G.F.; Strickler, Robert; Hannahs, Dan; Kamruzzaman, S.

doi:10.4043/18373-ms

Cited by 9 publications

(4 citation statements)

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“…A large portion of the peak stress caused by preloading will not be included in the calculation. This will create a less conservative analysis result (Breihan et al 2005;Bailey et al 2006) when evaluating RSC peak-stress condition and fatigue characteristics.…”

Section: Scf ¼ Ss App ;mentioning

confidence: 99%

A Novel Approach for Determining, Evaluating, and Applying Stress-Concentration Factors for Rotary-Shouldered Connections

Tang¹,

Muradov

Chandler

et al. 2009

SPE Drilling &Amp; Completion

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This paper presents a new analysis method for stress-concentration factor (SCF) in rotary-shouldered connections (RSCs). The proposed method uses finite-element analysis (FEA) as a primary tool to explore the maximum peak-stress behavior in RSCs and calculate SCF to evaluate the connection performance. Key findings include facts that the maximum peak stress and SCF value are functions of connector geometry and loading condition. The paper defines SCF in RSCs and provides a thorough discussion about the SCF-analysis method and its characteristics in evaluating drillstring-connection designs. The paper compares maximum peak-stress behaviors and SCF values among various RSC designs to demonstrate their role in selecting connections for drilling-, completion-, and intervention-riser applications.

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Section: Scf ¼ Ss App ;mentioning

confidence: 99%

A Novel Approach for Determining, Evaluating, and Applying Stress-Concentration Factors for Rotary-Shouldered Connections

Tang¹,

Muradov

Chandler

et al. 2009

SPE Drilling &Amp; Completion

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“…The peak stress change (Σ -Σ mean ) is a result of change in the pipe stress (σ -σ mean ). If one needs to know the absolute peak stress level at a geometric discontinuity location, proportional to an applied load or stress in the pipe body, the following formula can be used: (4) where Δ pipe stress = σ app -σ mean A similar approach for SAF will be: Σ = Σ pre-load + SAF x Δ pipe stress (5) where Δ pipe stress = σ app -σ pre-load Again, equation (4) references any given operational mean stress and equation (5) only references a specified preload stress. Usually pipe pre-load stress σ pre-load is zero.…”

Section: Spe 103052mentioning

confidence: 99%

“…A large portion of the peak stress due to pre-load will not be included in the calculation. This could create a less conservative analysis [3,4] when evaluating RSC peak stress and fatigue characteristics.…”

Section: Spe 103052mentioning

confidence: 99%

A Novel Approach for Determining, Evaluating, and Applying Stress Concentration Factor for Rotary-Shouldered Connections

Tang¹,

Muradov²,

Chandler³

et al. 2006

Proceedings of SPE Annual Technical Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThis paper presents a new stress concentration factor (SCF) analysis methodology for rotary shouldered connections (RSCs). The proposed method uses finite element analysis (FEA) as a primary tool to explore the maximum peak stress trends in RSCs and calculates SCF to represent the connection performance. The paper provides a thorough discussion on the SCF analysis methodology and its application in evaluating drill string connection designs. The paper also compares peak stress trends and SCF values among various RSC designs to assist in evaluation and selection of connections for drilling, completion and intervention riser applications.

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“…With the evolution of casing-drilling technology, casings are subjected to increasingly stringent conditions [1,2]. These conditions include higher pressure and higher mechanical loads for longer drilling periods.…”

Section: Introductionmentioning

confidence: 99%

Study on Fatigue Crack Growth Behavior of Casing-Drilling Steel N80

Feng

Song

et al. 2010

AMM

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An investigation into the fatigue crack growth behavior of N80 steel was carried out for casing-drilling technology. The results show that the effect of stress ratio on the △K corresponding to access of the tensile overload region is remarkable, and increasing the stress ratio is found to increase the FCGR at the same △K and reduce △K of access of the tensile overload region; the transgranular failure machanism is dominant for the N80 steel in the all crack growth stage; the fracture surface roughness decreases as the cracks propagate through threshold region and into Paris region, whereas it increases as the cracks propagate through Paris region and into the tensile overload region; the typical ductile-dimpled fracture mechanism observed on the tensile overload region is similar to the tensile fracture mode, although the orientation of the dimples significantly inclines to fatigue crack growth direction.

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Evaluation of a Casing Drilling Connection Subjected to Fatigue and Combined Load Testing

Cited by 9 publications

References 0 publications

A Novel Approach for Determining, Evaluating, and Applying Stress-Concentration Factors for Rotary-Shouldered Connections

A Novel Approach for Determining, Evaluating, and Applying Stress-Concentration Factors for Rotary-Shouldered Connections

A Novel Approach for Determining, Evaluating, and Applying Stress Concentration Factor for Rotary-Shouldered Connections

Study on Fatigue Crack Growth Behavior of Casing-Drilling Steel N80

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