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A new drilling method—Earthworm-like vibration drilling

The load transfer difficulty caused by borehole wall friction severely limits the penetration rate and extended-reach limit of complex structural wells. A new friction reduction technology termed “earthworm-like drilling” is proposed in this paper to improve the load transfer of complex structural w...

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Detalles Bibliográficos
Autores principales: Wang, Peng, Ni, Hongjian, Wang, Ruihe
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5895008/
https://www.ncbi.nlm.nih.gov/pubmed/29641615
http://dx.doi.org/10.1371/journal.pone.0194582
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author Wang, Peng
Ni, Hongjian
Wang, Ruihe
author_facet Wang, Peng
Ni, Hongjian
Wang, Ruihe
author_sort Wang, Peng
collection PubMed
description The load transfer difficulty caused by borehole wall friction severely limits the penetration rate and extended-reach limit of complex structural wells. A new friction reduction technology termed “earthworm-like drilling” is proposed in this paper to improve the load transfer of complex structural wells. A mathematical model based on a “soft-string” model is developed and solved. The results show that earthworm-like drilling is more effective than single-point vibration drilling. The amplitude and frequency of the pulse pressure and the installation position of the shakers have a substantial impact on friction reduction and load transfer. An optimization model based on the projection gradient method is developed and used to optimize the position of three shakers in a horizontal well. The results verify the feasibility and advantages of earthworm-like drilling, and establish a solid theoretical foundation for its application in oil field drilling.
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spelling pubmed-58950082018-05-04 A new drilling method—Earthworm-like vibration drilling Wang, Peng Ni, Hongjian Wang, Ruihe PLoS One Research Article The load transfer difficulty caused by borehole wall friction severely limits the penetration rate and extended-reach limit of complex structural wells. A new friction reduction technology termed “earthworm-like drilling” is proposed in this paper to improve the load transfer of complex structural wells. A mathematical model based on a “soft-string” model is developed and solved. The results show that earthworm-like drilling is more effective than single-point vibration drilling. The amplitude and frequency of the pulse pressure and the installation position of the shakers have a substantial impact on friction reduction and load transfer. An optimization model based on the projection gradient method is developed and used to optimize the position of three shakers in a horizontal well. The results verify the feasibility and advantages of earthworm-like drilling, and establish a solid theoretical foundation for its application in oil field drilling. Public Library of Science 2018-04-11 /pmc/articles/PMC5895008/ /pubmed/29641615 http://dx.doi.org/10.1371/journal.pone.0194582 Text en © 2018 Wang et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Wang, Peng
Ni, Hongjian
Wang, Ruihe
A new drilling method—Earthworm-like vibration drilling
title A new drilling method—Earthworm-like vibration drilling
title_full A new drilling method—Earthworm-like vibration drilling
title_fullStr A new drilling method—Earthworm-like vibration drilling
title_full_unstemmed A new drilling method—Earthworm-like vibration drilling
title_short A new drilling method—Earthworm-like vibration drilling
title_sort new drilling method—earthworm-like vibration drilling
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5895008/
https://www.ncbi.nlm.nih.gov/pubmed/29641615
http://dx.doi.org/10.1371/journal.pone.0194582
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