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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2018
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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. |
format | Online Article Text |
id | pubmed-5895008 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
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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