Prediction of casing wear in extended-reach drilling

Gao, Deli; Sun, Lianzhong; Jihong, Lian

doi:10.1007/s12182-001-0098-6

Cited by 51 publications

(30 citation statements)

References 13 publications

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“…Other material properties of the worn casing cement formation used in the numerical model are listed in Tables 1 and 2. A crescent shape of worn casing is assumed as shown in Figure 3. The reduction factor of worn casing is defined as the biggest reduction of casing thickness over the original casing thickness in (5). Field observations have shown that worn casing in many wells lost approximately 20% of the casing thickness [1].…”

Section: Numerical Modelingmentioning

confidence: 99%

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The Mechanism of Wellbore Weakening in Worn Casing-Cement-Formation System

Shen

Beck

Ling

2014

Journal of Petroleum Engineering

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Maintaining casing integrity, in terms of downhole zonal isolations and well stability, is extremely important in oil/gas wells. Casing wear occurs not only in directional drilling, but also in vertical drilling with a slight deviation angle. In most hydrocarbon wells, deteriorated casing was reported from the onset of casing wear by the presence of friction force during the rotation of drillpipe. The friction force against the casing wall causes the reduction of casing strength. Furthermore, the rotation of drillpipe combined with corrosive drilling fluids could dramatically degrade the casing strength. We used a finite element analysis to focus on the stress evolution in worn casings. Comparison study between worn casing and perfect casing was conducted. Our study showed that the thermal load significantly increases the stress concentration of the worn casing in the wellbore. Finite element solutions indicated that the radial stress of the worn casing is not affected as much as the hoop stress. Along with the increased burst pressure or the elevated temperature, the unworn portion of the casing also suffers from severe compression stress. This work is important to broadening the understanding of well engineers through addressing the true stress profile of worn casing in cemented wellbore.

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Section: Numerical Modelingmentioning

confidence: 99%

“…Researchers have investigated the stress profile of worn casing, focusing on the standalone casing [3,4]. Others found the relation of wear depth and contact force through experimental tests, with each wear depth recorded at a given contact force [5]. Researchers [6,7] have also studied the effect of formation to casing.…”

Section: Introductionmentioning

confidence: 99%

The Mechanism of Wellbore Weakening in Worn Casing-Cement-Formation System

Shen

Beck

Ling

2014

Journal of Petroleum Engineering

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“…A classe de material mais utilizada na fabricação de tubos é aço C-Mn. No entanto, a crescente demanda por perfuração de poços cada vez mais profundos e a presença de agentes corrosivos como H 2 S, CO 2 e cloretos [1] requerem materiais mais nobres do que os aços C-Mn [2][3][4][5]. Por isto, torna-se necessária a utilização de materiais mais nobres como aços austeníticos e ligas de níquel.…”

Section: Introductionunclassified

EFEITO DE DIFERENTES TRATAMENTOS TÉRMICOS SOBRE MICROESTRUTURA E MICRODUREZA DE UM SISTEMA AÇO C-Mn/REVESTIMENTO DE INCONEL 625

Trindade¹,

Faria²,

Souza³

et al. 2017

Tecnol. Metal. Mater. Min.

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ResumoA utilização de tubos de aço C-Mn na indústria de óleo e gás é muito comum desde o nascimento desta indústria. Mesmo com a grande evolução da metalurgia destes aços ao longo das últimas décadas, o desafio de desempenho em ambientes severos de corrosão devido às características reativas (H 2 S, CO 2 ) do petróleo e seus derivados, impõem uma nova era para a fabricação de tubos. A solução tecnológica mais direta seria a utilização de aços com alta liga (Ni, Cr) e/ou superligas de níquel. No entanto, os custos de produção tornariam inviáveis pelo alto custo destes materiais. Neste contexto, é crescente iniciativas de pesquisas para o desenvolvimento de overlay e/ou cladding, ou seja, revestimentos de aços C-Mn usando superligas de níquel e aços inoxidáveis. Neste trabalho, foi utilizada a deposição de uma camada da superliga de níquel Inconel 625 através do processo laser. Uma das desvantagens da deposição a laser ou qualquer outro processo de fusão é a formação de uma região de descontinuidade microestrutural no aço, chamada de ZTA (zona termicamente afetada pelo calor). Neste estudo, diferentes rotas de tratamentos térmicos foram investigadas com o objetivo de eliminar a ZTA e preservar as características originais do substrato e do revestimento. Palavras-chave: Revestimento inconel 625/aço C-Mn; Perfil de microdureza; Transformação de fase; Martensita revenida; ZTA; Tratamentos térmicos. EFFECT OF DIFFERENT HEAT TREATMENTS ON MICROSTRUCTURE AND MICROHARDNESS OF A C-Mn STEEL/INCONEL 625 COATING SYSTEM AbstractThe application of C-Mn steel pipe in the oil & gas industry is quite common since starting of this industry. Even with the great evolution of the metallurgy of this type of steel over the last decades, the challenge is to overcome the corrosion severity caused by sour (H 2 S, CO 2 ) species present in the petroleum and its derivates. The direct technological solution would be to replace the C-Mn steel by Ni-based superalloys and/or stainless steels. However, the high costs of these materials would make several projects impracticable. In this context, there are several initiatives in order to develop overlay and/or cladding, that means, coatings of C-Mn steels using superalloys and stainless steels. In this work, it was used an overlay deposition of Inconel 625 on the surface of a C-Mn steel using the laser process. A disadvantage of laser deposition, as it is for any deposition melting process, is the formation of a microstructural discontinuity in the steel substrate caused by the thermal cycle (HAZ = heat affected zone). In this study, different heat treatment routes were investigated aiming to eliminate the HAZ preserving the original characteristics of the substrate and of the coating.

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“…[1][2][3] The highly deviated well in this article refers to the well with deviation angle greater than 45°. 4,5 Because of long drilling cycle, large friction, and big side force acting on the casing, the casing wear phenomenon is very severe.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on casing wear in highly deviated drilling for oil and gas

Lian

Lin

et al. 2016

Advances in Mechanical Engineering

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Aimed at studying the casing wear in the highly deviated well drilling, the experimental study on the casing wear was carried out in the first place. According to the test data and the linear wear model based on the energy dissipation proposed by White and Dawson, the tool joint-casing wear coefficient was obtained. The finite element model for casing wear mechanism research was established using ABAQUS. The nodal movement of the contact surface was employed to simulate the evolution of the wear depth, exploiting the Umeshmotion user subroutine. In addition, the timedependent geometry of the contact surfaces between the tool joint and casing was being updated continuously. Consequently, the contact area and contact pressure were changed continuously during the casing wear process, which gives a more realistic simulation. Based on the shapes of worn casing, the numerical simulation research was carried out to determine the remaining collapse strength. Then the change curve of the maximum casing wear depth with time was obtained. Besides, the relationship between the maximum wear depth and remaining collapse strength was established to predict the maximum wear depth and the remaining strength of the casing after a period of accumulative wear, providing a theoretical basis for the safety assessment of worn casing.

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Prediction of casing wear in extended-reach drilling

Cited by 51 publications

References 13 publications

The Mechanism of Wellbore Weakening in Worn Casing-Cement-Formation System

The Mechanism of Wellbore Weakening in Worn Casing-Cement-Formation System

EFEITO DE DIFERENTES TRATAMENTOS TÉRMICOS SOBRE MICROESTRUTURA E MICRODUREZA DE UM SISTEMA AÇO C-Mn/REVESTIMENTO DE INCONEL 625

Experimental and numerical study on casing wear in highly deviated drilling for oil and gas

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