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of 2 447
pro vyhledávání: '"drill string"'
Improved stiff string torque and drag prediction using a computationally efficient contact algorithm
Autor:
Sampath Liyanarachchi, Geoff Rideout
Publikováno v:
Mathematical and Computer Modelling of Dynamical Systems, Vol 30, Iss 1, Pp 417-443 (2024)
Due to the intermittent contact with the wellbore, determining torque and drag for deviated wells is difficult. Most models have ignored drill string stiffness and assumed continual contact to simplify derivation. However, the accuracy of these ‘so
Externí odkaz:
https://doaj.org/article/9ba785ceb9424cbbae99c96efaa2f0e8
Publikováno v:
Petroleum, Vol 10, Iss 3, Pp 446-461 (2024)
The safety and efficiency of drilling engineering are greatly impeded by destructive vibrations of drill string in air drilling, such as stick-slip, bit-bounce and their coupled vibrations. To avoid or suppress these vibrations improving the stabilit
Externí odkaz:
https://doaj.org/article/a929eab7cc13490cb34cb57866fa7314
Publikováno v:
Vibration, Vol 7, Iss 3, Pp 802-828 (2024)
Optimization of drilling processes for oil and gas and geothermal wells requires the effective use of mechanical energy for the destruction of rocks. When constructing a well, an important indicator of the drilling stage is the mechanical speed. Ther
Externí odkaz:
https://doaj.org/article/017ad0fe19bd4d95a42c4e136abf53d8
Publikováno v:
Vibration, Vol 7, Iss 2, Pp 479-502 (2024)
A novel control technique is presented in this paper, which is based on a first-order adaptive sliding mode that ensures convergence in a finite time without any prior information on the upper limits of the parametric uncertainties and/or external di
Externí odkaz:
https://doaj.org/article/2c552296ecb0461d85ecedff9c2f4e1a
Publikováno v:
Energy Reports, Vol 9, Iss , Pp 2372-2378 (2023)
Large amplitude and high frequency WOB (weight on bit) fluctuation will lead to problems such as low rock breaking efficiency, short service life and slow drilling speed. This problem is particularly prominent in hard and difficult to drill formation
Externí odkaz:
https://doaj.org/article/3d4638a55bba4c18bb29781e4df75f5d
Publikováno v:
Petroleum, Vol 9, Iss 2, Pp 205-213 (2023)
Improper drilling parameters may cause severe vibration of drill string which leads to reduce the rate of penetration and drilling tool premature failure accidents in the drilling process of ultra-deep well. The study on dynamic characteristics of dr
Externí odkaz:
https://doaj.org/article/d5a67372d262463eae496e80f494093c
Publikováno v:
Modelling, Vol 4, Iss 2, Pp 296-322 (2023)
This paper deals with the development of a novel mesoscopic model of polycrystalline diamond compact (PDC) drill bits that can be implemented in complex drill string models for simulations to analyse the influence of rock inhomogeneities or the impac
Externí odkaz:
https://doaj.org/article/f7e476f9e93b42efbdb93a826f41ced7
Akademický článek
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Autor:
Weikai Liu, Zhimin Tian, Yueqing Xu, Min Zhao, Runqi Li, Haibo Pang, Hongyan Zhao, Ziming Feng
Publikováno v:
Tehnički Vjesnik, Vol 30, Iss 1, Pp 39-51 (2023)
For the design and construction of the extended-reach well, the ultimate elongation capacity of the extended-reach well was studied. Given the drilling practice of extended-reach well, the extension limit prediction criterion of extended-reach well i
Externí odkaz:
https://doaj.org/article/c4607246b6584d988ee106f7cbc95b7f
Publikováno v:
Mathematical and Computer Modelling of Dynamical Systems, Vol 28, Iss 1, Pp 197-228 (2022)
The oilwell drilling fluid flows cause viscous and hydrodynamic forces on drill strings. This effect is ignored or treated as a constant in most drill string models. The present study introduces mathematical models for lateral vibration damping and a
Externí odkaz:
https://doaj.org/article/27495df832fa4d32be4e286c5255278a