A Novel Double Bevel Support Structure for Downhole Robot

Liu, Qingyou; Jian, Zhao; Zhu, Hehua; Wei, Zheng; Yang, Yong

doi:10.1007/s13369-018-3316-x

Cited by 5 publications

(4 citation statements)

References 21 publications

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“…The maximum normal working temperature of all robot of WWT company can reach 148 °C. The outer diameter of the robot with eccentric link shown in Figure 6 (3) Isotropic dual-slant linkage telescopic drilling traction robot As shown in Figures 7-8, an isotropic dual-slant linkage telescopic drilling traction robot is studied by Zhao [16] et al With two types of support modes, inclined support and linkage support, its maximum traction force of more than 70,000 N. The innovative design method of miniaturization of the eccentric flow channel was also designed [17], resulting in an outer diameter of 100 mm. and found to be working properly.…”

Section: Research Status Of Telescopic Traction Robotmentioning

confidence: 99%

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Research status and development trend of traction robot of coiled tubing

Zhao,

Wang,

Chen

et al. 2023

J. Phys.: Conf. Ser.

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Coiled tubing (CT) is prone to buckling and locking due to axial friction when extending in large displacement directional wells and horizontal wells. The traction robot of CT can provide axial traction, which can fundamentally address the problem of difficult downward entry of CT. The operation principle, size, traction force, traction speed and other technical indicators of the existing more cutting-edge types of traction robots are analyzed, and the critical structural features of traction robots are summarized. The application prospect of drilling bridge plug technology and drilling technology of the traction robot is put forward. The main points of the research on the traction robot are summarized to provide a concise reference for the future development direction.

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Section: Research Status Of Telescopic Traction Robotmentioning

confidence: 99%

“…Zhao [16][17][18][19] studied two telescopic drilling robots, which are more cutting-edge researches about downhole robots in the field of drilling. The robot is equipped with flow channels for drilling fluid inside.…”

Section: Drilling Technology Of Traction Robot Of Ctmentioning

confidence: 99%

Research status and development trend of traction robot of coiled tubing

Zhao,

Wang,

Chen

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

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“…If the propping wheel cannot cross through obstacles, the WDR may be seized, affecting normal operations, and even resulting in downhole accidents. Therefore, the industry places higher demands on the obstacle surmounting the performance of the existing WDR [14,15]. The WDR is essentially composed of the transmission mechanism and the support adjustment mechanism.…”

Section: Introductionmentioning

confidence: 99%

Design and Dynamic Characteristics Analysis of Novel Support Adjustment Mechanism of Wheeled Downhole Tractor

Jian

Zhao

Wei³

et al. 2023

Processes

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Conventional design method of the downhole tractor is based on cementing casing, which is only suitable for the smooth wellbore. For the open hole well, the conventional downhole tractor has poor adaptability and even cannot work normally. In order to improve the obstacle surmounting performance of the wheeled downhole tractor (WDR) and expand the application range of the WDR, a double push rod-double spring support adjustment mechanism (DPRDSSAM) is proposed in this paper. Meanwhile, the proposed DPRDSSAM also needs to increase the traction force and the stability of the WDR in the open hole well. Kinematic simulation numerical models of both conventional support adjustment mechanism and the DPRDSSAM are established. The two models comprehensively considere the influence of different obstacle forms and sizes on the obstacle surmounting performance of the tractor. The influence of different obstacle forms on the obstacle surmounting performance of DPRDSSAM and single push rod support adjustment mechanism (SPRSAM) is analyzed. Results show that the DPRDSSAM has better obstacle surmounting performance than the SPRSAM. The DPRDSSAM can effectively promote further research and application of the tractor in the open hole well.

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“…However, few concerns have been arisen. Reported linkages can be divided into two classes, the active and the passive [8,9]. As the name suggests the active one can change direction actively [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Bending Stiffness Analysis for Spring Linkage Applied to In-Pipe Robot

Qiao

Liu

2020

Mathematical Problems in Engineering

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Spring linkage can be applied to in-pipe robots for connecting different modules together and can make it pass through elbows more easily. However, its stiffness cannot be set to be too hard or too soft. This paper tries to make a balance between the compressive stiffness and the bending stiffness of the spring. After a brief introduction to the construction mechanism and some assumptions, the mathematical representation of the spring bending stiffness was deduced based on the Kirchhoff theory which describes the spatial curve with displacement rather than time. Then, some simulations aiming at verifying the correctness of the deduced bending stiffness expression were carried out. Finally, the relationship between the two rigidities was found out, which helps to find a way to decrease the bending stiffness of spring while keeping its compressive stiffness strong enough.

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A Novel Double Bevel Support Structure for Downhole Robot

Cited by 5 publications

References 21 publications

Research status and development trend of traction robot of coiled tubing

Research status and development trend of traction robot of coiled tubing

Design and Dynamic Characteristics Analysis of Novel Support Adjustment Mechanism of Wheeled Downhole Tractor

Numerical Simulation of Bending Stiffness Analysis for Spring Linkage Applied to In-Pipe Robot

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