Calculations of the depth and dynamic frictional resistance upon drilling with a simultaneous casing based on the energy method

Calculations of the depth and dynamic frictional resistance upon drilling with a simultaneous casing based on the energy method | 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 Calculations of the depth and dynamic frictional resistance upon drilling with a simultaneous casing based on the energy method Deyuan Pan, Jie Wang, Guoqing Fang, Liang Xiong This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4387122/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Drilling with simultaneous casings of pneumatic DTH (down-the-hole) hammers has been extensively used in various complex formations because it can rapidly, safely and economically drill holes. The maximum depth and the skin friction associated with air DTH hammer drilling with a casing are very important parameters for project design and construction. By analyzing the conversion of impact energy and strain energy based on the energy method during the drilling process with a casing, we focused on the final stage of casing drilling and proposed a theoretical calculation method for the maximum depth and skin friction. At the same time, combined with the relevant technical specifications, the value of skin friction is improved and supplemented by analogy and induction. Finally, the theory was analyzed and validated through relevant construction examples with high accuracy, and then, the strain of the casing string under the action of a double impactor was analyzed with the concept of a neutral point. This distinguishes it from the stress wave method for calculation; its advantage is that both the strain energy and impact energy are incremental parameters at a certain time, without considering the influence of other forces during the construction process, which can greatly reduce the computational difficulty. The important calculation parameters include the casing wall thickness, casing outer diameter, and impactor power, which are exponentially related to the maximum depth and have a relatively small impact on the calculation results. The way to significantly increase the depth of drilling with a casing is to install multiple impactors on the casing string to change the force mode of the pipe string. Physical sciences/Engineering Physical sciences/Engineering/Civil engineering Physical sciences/Engineering/Mechanical engineering Pneumatic DTH hammer Drilling with simultaneous casing Maximum depth of drilling with simultaneous casing Energy method Impact work Strain energy Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted 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. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4387122","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":305155962,"identity":"709f297a-33fb-46ac-a319-3160b383215d","order_by":0,"name":"Deyuan Pan","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABEUlEQVRIiWNgGAWjYJACCTDJ3sDAkFBAkhaeA0AtBiRpkUgAEsRoMWc/e/DGx7bD8uaSrxM/PDBgkJf3P8D84mMbg7w5Di2WPXnJljPbDhvunJ27WQLoMMONNxLYgCIMhjsbsGsxOJBjJs3bdphxw+3cDSAtCYYzGNiMec4A/XUAh5bzb8yk/7Ydtt9w8+zmH2At/QcIaLkBtIWx7XDihhu828C2yDMkMD/mqcCtxXLGG2PLnnPpyRvO5G6zSDCQMNwgkdjGOKMCyMChxZw/x/DGjzJr2w3Hz26++aPCRl6+//DhDx8MbORxOgxEMLLB+RLAAGFsk4BFFk4tDH+QROQbGJg/4FQ/CkbBKBgFIxEAAAXBXYQYqGQVAAAAAElFTkSuQmCC","orcid":"","institution":"Changsha Natural Resources Comprehensive Survey, China Geological Survey","correspondingAuthor":true,"prefix":"","firstName":"Deyuan","middleName":"","lastName":"Pan","suffix":""},{"id":305155963,"identity":"fdd6eaa9-e493-4f2f-88a0-38121fff78f4","order_by":1,"name":"Jie Wang","email":"","orcid":"","institution":"Changsha Natural Resources Comprehensive Survey, China Geological Survey","correspondingAuthor":false,"prefix":"","firstName":"Jie","middleName":"","lastName":"Wang","suffix":""},{"id":305155964,"identity":"d92e2fd4-4c59-48b6-a38d-69f4441ebf9e","order_by":2,"name":"Guoqing Fang","email":"","orcid":"","institution":"Changsha Natural Resources Comprehensive Survey, China Geological Survey","correspondingAuthor":false,"prefix":"","firstName":"Guoqing","middleName":"","lastName":"Fang","suffix":""},{"id":305155965,"identity":"5a0c0599-6fe2-4194-ae5b-1b2ab3342cd1","order_by":3,"name":"Liang Xiong","email":"","orcid":"","institution":"Guangzhou Marine Geological Survey, China Geological Survey","correspondingAuthor":false,"prefix":"","firstName":"Liang","middleName":"","lastName":"Xiong","suffix":""}],"badges":[],"createdAt":"2024-05-08 06:57:17","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4387122/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4387122/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":81198360,"identity":"aa95e55b-623f-4be8-8486-0af7229e736b","added_by":"auto","created_at":"2025-04-23 10:46:57","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":388878,"visible":true,"origin":"","legend":"","description":"","filename":"4Thepaper1.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4387122/v1_covered_548961d3-98aa-4333-ac70-6d9f811c7566.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Calculations of the depth and dynamic frictional resistance upon drilling with a simultaneous casing based on the energy method","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Pneumatic DTH hammer, Drilling with simultaneous casing, Maximum depth of drilling with simultaneous casing, Energy method, Impact work, Strain energy","lastPublishedDoi":"10.21203/rs.3.rs-4387122/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4387122/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eDrilling with simultaneous casings of pneumatic DTH (down-the-hole) hammers has been extensively used in various complex formations because it can rapidly, safely and economically drill holes. The maximum depth and the skin friction associated with air DTH hammer drilling with a casing are very important parameters for project design and construction. By analyzing the conversion of impact energy and strain energy based on the energy method during the drilling process with a casing, we focused on the final stage of casing drilling and proposed a theoretical calculation method for the maximum depth and skin friction. At the same time, combined with the relevant technical specifications, the value of skin friction is improved and supplemented by analogy and induction. Finally, the theory was analyzed and validated through relevant construction examples with high accuracy, and then, the strain of the casing string under the action of a double impactor was analyzed with the concept of a neutral point. This distinguishes it from the stress wave method for calculation; its advantage is that both the strain energy and impact energy are incremental parameters at a certain time, without considering the influence of other forces during the construction process, which can greatly reduce the computational difficulty. The important calculation parameters include the casing wall thickness, casing outer diameter, and impactor power, which are exponentially related to the maximum depth and have a relatively small impact on the calculation results. The way to significantly increase the depth of drilling with a casing is to install multiple impactors on the casing string to change the force mode of the pipe string.\u003c/p\u003e","manuscriptTitle":"Calculations of the depth and dynamic frictional resistance upon drilling with a simultaneous casing based on the energy method","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-05-22 05:47:25","doi":"10.21203/rs.3.rs-4387122/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"ab484f43-c6eb-40af-9799-db1df1285380","owner":[],"postedDate":"May 22nd, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":32220497,"name":"Physical sciences/Engineering"},{"id":32220498,"name":"Physical sciences/Engineering/Civil engineering"},{"id":32220499,"name":"Physical sciences/Engineering/Mechanical engineering"}],"tags":[],"updatedAt":"2025-04-23T10:38:47+00:00","versionOfRecord":[],"versionCreatedAt":"2024-05-22 05:47:25","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4387122","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4387122","identity":"rs-4387122","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}