Development of a fibre reinforced polymer composite clamp for metallic pipeline repairs

Djukic, Luke P.; Sum, Wei Siang; Leong, Kok Hoong; Hillier, W.; Eccleshall, Timothy W.; Leong, Alan

doi:10.1016/j.matdes.2014.12.059

Cited by 25 publications

(16 citation statements)

References 8 publications

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“…Generally speaking, the leakage sealing capacity of the composite material clamp increases with the increase of the thickness and the increase of the seal hardness, and decreases with the increase of the gap small. Finally, the results successfully proved the design method of these composite clamps [4]. In 2016, Sum W S, Leong K H and others proposed a new method of repairing leaking or other damaged metal pipes using composite material clamps.…”

Section: Current Status Of Clamp Researchmentioning

confidence: 68%

Hydrodynamic Load Analysis and Experimental Study of Grouting Clamp under Wave and Ocean Current

Zhang

Shang

Wang

et al. 2020

JMSE

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The repair of offshore platform jackets is an important research direction in marine engineering, among which the grouting clamp reinforcement is the most widely used. In order to solve the hydrodynamic force of the grouting hoop under the joint action of wave and current in the complex sea condition, the Morison formula is used to analyze the linear wave load on the grouting hoop; then, based on the Morison formula, load force under the combined action of the wave and the ocean current on the clamps in different installation states was determined; finally, the screw jack and car jack were used to carry out the experiment of preventing the clamp from falling off. The mechanical grouting clamp experiment and the wedge tooth experiment were carried out at the same time. The innovative design of the mechanical grouting clamp, analyzed analogously through relevant experimental results and numerical analysis results confirmed that the reinforcement and repair method of the designed grouting clamp is of great help to the safety and reliability of the offshore platform jacket.

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Section: Current Status Of Clamp Researchmentioning

confidence: 68%

Hydrodynamic Load Analysis and Experimental Study of Grouting Clamp under Wave and Ocean Current

Zhang

Shang

Wang

et al. 2020

JMSE

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“…In works [6,7] external factors influencing the stress state of the pipe are considered. The coefficients of adhesion in the clamping devices are analyzed.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Analysis of the Condition of a Pipe Fixed in a Clamping Device

Afandiyev

Nuriyev

2021

Eureka: PE

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Due to the fact that clamping devices are widely used in various industries, the requirements for the operation of such devices are constantly increasing. This is due to an increase in the general requirements for processing accuracy, as well as an increase in the forces acting on the clamped part. The reliability of these devices when working with thin-walled cylindrical parts is of great importance. Thin-walled cylinders used in mechanical engineering are subject to significant loads. With prolonged exposure to loads from clamping forces, as well as from axial tensile forces, plastic deformations of cylindrical parts occur. In the oil and gas industry, when clamping drill and casing pipes in some areas in the capture zone, stresses exceed the yield strength. Multiple clamping of the pipe will reduce the pipe wall in the gripping area, which causes premature pipe failure. Therefore, increasing the holding capacity of clamping mechanisms is relevant. Analysis of broken drill pipes, which have been operating in wedge grips for a long time, showed that in most cases the pipes undergo plastic deformation caused by damage to the pipe surface by the teeth of the ram. To clarify the actual conditions of loading the pipe and the possibilities of increasing the capacity of the clamping devices, studies of the contact pressures in the clamping zone were carried out. A new pipe clamping chuck is also presented, which provides a sufficiently high reliability of fastening of cylindrical parts.

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“…Other works have also investigated the effect of clamping device design elements on the stress state and deformation of the pipe, and recommendations are given for improving their design in order to increase the holding capacity. A method of surface hardening is proposed to increase the service life of drill pipes [5][6][7].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Analysis of reliability of the drill pipe in the clamping mechanism

Afandiyev

Nuriyev

2021

Eureka: PE

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In oilfield equipment, a significant place is occupied by clamping mechanisms used to grip pipes during tripping operations. They are mainly divided into 2 groups. The first includes mechanisms with a forced clamping of the part. The second group includes self-clamping devices with a wedge mechanism. Here, the clamping force increases in proportion to the axial shear force. In these clamping devices, clamping jaws serve as a common element. In addition to smooth jaws, there may be jaws with notches on the inner cylindrical surface. Such notches contribute to an increase in the coefficient of adhesion when clamping cylindrical parts, in particular pipes. During the operation of clamping devices with corrugated jaws, the teeth of the notch are introduced into the pipe walls under the action of the clamping force. The shearing force can then displace the pipe relative to the jaws. The adhesion coefficient µ is the ratio of the shear force P to the clamping force Q, i.e. P/Q. Exceeding the shear force P of the limit value causes the pipe to be clamped to move. The correct choice of the place of load application is also of great importance. Optimum clamping performance can be achieved by clamping workpieces without slipping from shear forces. At the same time, it is necessary to ensure reliability, efficiency, productivity. Therefore, all factors that determine the holding capacity of clamping mechanisms should be considered. These factors include the coefficient of adhesion, the design of the working surfaces of the clamping elements, the type of notch of the corrugated jaws and the place of application of the clamping force

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Development of a fibre reinforced polymer composite clamp for metallic pipeline repairs

Cited by 25 publications

References 8 publications

Hydrodynamic Load Analysis and Experimental Study of Grouting Clamp under Wave and Ocean Current

Hydrodynamic Load Analysis and Experimental Study of Grouting Clamp under Wave and Ocean Current

Analysis of the Condition of a Pipe Fixed in a Clamping Device

Analysis of reliability of the drill pipe in the clamping mechanism

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