Design and experimental study of a new hydraulic tool for LCM plugging while drilling

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This paper studied a new hydraulic tool for lost-circulation material (LCM) plugging while drilling, using a hydraulic jet on the drill pipe to differentially inject particle-laden drilling fluid into natural or induced borehole fractures. In laboratory testing with specific drilling-fluid additives (ground marble, ground nutshells, fibers, and graphite), the authors report that the tool drives particles into fracture mouths to form a firm seal that isolates wellbore pressure, while also generating a nearly impermeable mud-cake that alters effective stress concentration around the borehole based on the stress cage theory. A field experiment is also presented, with results indicating improved fracture bridging and formation of stable plugs and enhanced wellbore pressure containment (WPC). The major caveat explicitly stated is that the work is a preprint and has not been peer reviewed. The paper does not explicitly discuss endometriosis or adenomyosis; it was included in the corpus via a keyword match in the upstream search index.

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Abstract Big Data Analysis from the worldwide field shows that lost circulation is a common phenomenon in drilling and the success ratio of remedial treatment for lost circulation is low. It is not only because of these complexities of the formation, but also because of the poor performances of the plugging materials and technologies. This paper proposes a new method in plugging, which is based on a particular physical method for lost circulation controlling and plugging while drilling. This method is different from these traditional treatments, which only use chemical methods. Through a hydraulic tool manufactured for using in drilling process, the drilling fluid will have a diffluence at a constant rate from the jet of the hydraulic tool which is installed on the drilling pipe and the fluid laden with particles can be injected into the natural or induced fractures of the borehole wall which may lead to lost circulation. Combined with the corresponding drilling fluids which have been tested in the laboratory, the additives such as ground marble, ground nutshells, fibers and graphite in the drilling fluid are quickly pushed into the fractures because of the differential pressure provide by the hydraulic tool, then form a firm seal at the mouth of the fractures which could isolate fluid pressure in the wellbore and prevent effective pressure communication to interfere the extension of the fracture. What’s more, according to the stress cage theory, when these sealing particles which prop the fracture open, act as wedges to compress the rock around the wellbore, the hoop stress could be increased, so that the WPC (wellbore pressure containment) could be improved. In this paper, a lab test and a field experiment are presented. The experiment result reveals that the hydraulic tool is able to force more material into the fracture, bridge at the mouth of the fracture, form a stable plug in the fracture to isolate the hydraulic pressure in the wellbore, and add a nearly impermeable mud-cake on the wellbore wall to change the effective stress concentration around the borehole. The result demonstrates that the hydraulic tool can provide an effective preventive treatment for lost circulation and an improvement of WPC. It is then feasible to avoid lost circulation events when using this hydraulic tool.
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Design and experimental study of a new hydraulic tool for LCM plugging while drilling | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Design and experimental study of a new hydraulic tool for LCM plugging while drilling Guohua Wang, Hailong Jiang, Wei Li This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4766759/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 29 Nov, 2024 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract Big Data Analysis from the worldwide field shows that lost circulation is a common phenomenon in drilling and the success ratio of remedial treatment for lost circulation is low. It is not only because of these complexities of the formation, but also because of the poor performances of the plugging materials and technologies. This paper proposes a new method in plugging, which is based on a particular physical method for lost circulation controlling and plugging while drilling. This method is different from these traditional treatments, which only use chemical methods. Through a hydraulic tool manufactured for using in drilling process, the drilling fluid will have a diffluence at a constant rate from the jet of the hydraulic tool which is installed on the drilling pipe and the fluid laden with particles can be injected into the natural or induced fractures of the borehole wall which may lead to lost circulation. Combined with the corresponding drilling fluids which have been tested in the laboratory, the additives such as ground marble, ground nutshells, fibers and graphite in the drilling fluid are quickly pushed into the fractures because of the differential pressure provide by the hydraulic tool, then form a firm seal at the mouth of the fractures which could isolate fluid pressure in the wellbore and prevent effective pressure communication to interfere the extension of the fracture. What’s more, according to the stress cage theory, when these sealing particles which prop the fracture open, act as wedges to compress the rock around the wellbore, the hoop stress could be increased, so that the WPC (wellbore pressure containment) could be improved. In this paper, a lab test and a field experiment are presented. The experiment result reveals that the hydraulic tool is able to force more material into the fracture, bridge at the mouth of the fracture, form a stable plug in the fracture to isolate the hydraulic pressure in the wellbore, and add a nearly impermeable mud-cake on the wellbore wall to change the effective stress concentration around the borehole. The result demonstrates that the hydraulic tool can provide an effective preventive treatment for lost circulation and an improvement of WPC. It is then feasible to avoid lost circulation events when using this hydraulic tool. Physical sciences/Energy science and technology Physical sciences/Engineering hydraulic tool lost circulation controlling and plugging while drilling Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 29 Nov, 2024 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 28 Oct, 2024 Reviews received at journal 27 Oct, 2024 Reviews received at journal 17 Oct, 2024 Reviewers agreed at journal 13 Oct, 2024 Reviewers agreed at journal 02 Oct, 2024 Reviewers invited by journal 30 Sep, 2024 Editor assigned by journal 30 Sep, 2024 Editor invited by journal 26 Jul, 2024 Submission checks completed at journal 24 Jul, 2024 First submitted to journal 19 Jul, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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