The reliability-based evaluation of casing collapsing strength and its application in marine gas reservoirs

Zhu, Xiaohua; Liu, Biao

doi:10.1016/j.engfailanal.2017.12.005

Cited by 13 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At present, the exploitation of oil wells is developing towards deep/ultra-deep wells, and the corresponding harsh environment of high temperatures, high pressures, high corrosion, and complex strata put forward higher requirements for the performance of packer rubber. The aging [2] and stress relaxation [3] behaviors of rubber cylinders at high temperatures and under high pressures, the corrosion of formation water containing acid carbon dioxide [4] or the corrosion of seawater in deep-sea oilfields [5], the shell buckling of the large displacement horizontal part [6], the inhomogeneity of formation stress that leads to the uneven contact between packer rubber and the well wall [7], all greatly reduce the service life of packer rubber.…”

Section: Introductionmentioning

confidence: 99%

Application Characteristics of Zeolite-Based Stuffing for Nanofluidic Packer Rubber

et al. 2022

View full text Add to dashboard Cite

Aiming at obtaining the application characteristics of more nanofluidic stuffing to enrich the database of nanofluidic packer rubber, three zeolite-based nanofluidic types of stuffing with water, glycerin, and a saturated aqueous solution of KCl (hereinafter referred to as saturated KCl solution) as the functional liquids were studied using experiments. The results showed that all the three zeolite-based nanofluidic stuffing types could be applied as stuffing for nanofluidic packer rubber. The setting pressure ranges for zeolite/water, zeolite/glycerin, and zeolite/saturated KCl solution stuffing were 21.71 to 30.62 MPa, 15.31 to 23.57 MPa, and 27.50 to 38.83 MPa, and the specific deformation quantities of the three stuffing types were 72.76, 102.07, and 77.54 mm3∙g−1, respectively. In zeolite/saturated KCl solution stuffing, the number of liquid molecules retained in the nanochannels was the minimum; thus, this stuffing type was the most stable during application. The order of the equivalent surface tensions of the three zeolite-based stuffing types in the confined nanochannels was consistent with the order of the gas–liquid surface tensions in the bulk phase. The equivalent surface tension, which reflected the interaction between liquid–solid phases, dominated the pressure threshold, the deformation capacity, and the stability of nanofluidic stuffing. This research study provided data support for the application of nanofluidic packer rubber.

show abstract

Section: Introductionmentioning

confidence: 99%

Application Characteristics of Zeolite-Based Stuffing for Nanofluidic Packer Rubber

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Injecting CO 2 into the depleted oil reservoirs for storage or to enhance oil and gas production is considered as one of the effective measures to reduce the content of CO 2 in the atmosphere (Ajayi et al 2019;Kalra et al 2018;Khather et al 2019). However, as an acid gas, CO 2 is highly corrosive in water-containing environment (Zhu and Liu 2018). After operating under highly corrosive conditions for a certain period, the casing of CO 2 injection wells in Shengli Oilfield exhibited serious corrosion behavior, posing a threat to well safety and severely limiting the promotion of CO 2 -enhanced oil recovery technology.…”

Section: Introductionmentioning

confidence: 99%

Risk assessment of corroded casing based on analytic hierarchy process and fuzzy comprehensive evaluation

et al. 2020

View full text Add to dashboard Cite

Casing corrosion during CO2 injection or storage results in significant economic loss and increased production risks. Therefore, in this paper, a corroded casing risk assessment model based on analytic hierarchy process and fuzzy comprehensive evaluation is established to identify potential risks in time. First, the corrosion rate and residual strength characteristics are analyzed through corrosion tests and numerical simulations, respectively, to determine the risk factors that may lead to an accident. Then, an index system for corroded casing risk evaluation is established based on six important factors: temperature, CO2 partial pressure, flow velocity, corrosion radius, corrosion depth and wellhead pressure. Subsequently, the index weights are calculated via the analytic hierarchy process. Finally, the risk level of corroded casing is obtained via the fuzzy comprehensive evaluation. The corroded casing risk assessment model has been verified by a case well, which shows that the model is valuable and feasible. It provides an effective decision-making method for the risk evaluation of corroded casing in CO2 injection well, which is conductive to improve the wellbore operation efficiency.

show abstract

“…The API 5CT standard prescribes regulations for production of protective seam welded pipes, which are used in wells, [2][3][4]. Automatic or semi-automatic production of welded pipes enables the continuous production of longitudinal-seam welded pipes where the basic intention is to reach the welding speed equal to speed of the pipeforming.…”

Section: Introductionmentioning

confidence: 99%

The Fault Tree Analysis of Causes of the Welded Pipes Failures in Exploitation

Nikolić¹,

Arsić²,

Arsić³

et al. 2020

Komunikácie

View full text Add to dashboard Cite

Premature failure or damage of parts and components of the oil and gas well piping, as well as pipelines for transport of oil and gas, are generally caused by the simultaneous influence of a large number of technological, metallurgical, structural and exploitation factors. Therefore, the convenient structural solutions, which provide the mechanical safety of parts and integrity of structures, can be realized only through total comprehension of their behavior in various operation regimes. Importance of technical diagnostics for monitoring and state analysis of welded pipes/pipelines in oil industry is considered in this paper. An analysis of causes of the welded pipes failures in exploitation has been performed through use of the fault tree analysis. Based on the suggested structure of a database, regarding the causes of failure, possibilities are presented to set measures for prevention of damage and failure of welded pipes/pipelines and for extension of their service life. A suggestion for improvement of the organizational scheme for monitoring the state and maintenance of welded pipes/pipelines during the exploitation has been made, as well.

show abstract

The reliability-based evaluation of casing collapsing strength and its application in marine gas reservoirs

Cited by 13 publications

References 6 publications

Application Characteristics of Zeolite-Based Stuffing for Nanofluidic Packer Rubber

Application Characteristics of Zeolite-Based Stuffing for Nanofluidic Packer Rubber

Risk assessment of corroded casing based on analytic hierarchy process and fuzzy comprehensive evaluation

The Fault Tree Analysis of Causes of the Welded Pipes Failures in Exploitation

Contact Info

Product

Resources

About