E21B 3/025

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
2022/0243,533 Arrangement of a ground drilling device, method for operating a ground drilling device and use of an arrangement of a ground drilling deviceJan 24, 22Aug 04, 22Not available
2021/0095,553 MICRO-ROTATING DRILLING METHOD IN DIRECTIONAL DRILLING, COMPUTER DEVICE AND READABLE STORAGE MEDIUMMay 26, 20Apr 01, 21Not available
2020/0308,911 GUIDANCE SYSTEMS AND APPARATUS FOR POWER SWIVELNov 21, 16Oct 01, 20NATIONAL OILWELL VARCO L.P.
2020/0095,829 DIRECT WRAP MEASUREMENT DURING CONNECTION FOR OPTIMAL SLIDE DRILLINGSep 24, 18Mar 26, 20Not available
2013/0008,718 CONTROL SYSTEM AND INTERFACE FOR A TUNNELING APPARATUSMar 26, 10Jan 10, 13VERMEER MANUFACTURING COMPANY
2010/0139,985 VIBRATORY DRILL HEAD MOUNTING AND ROTATION COUPLING SYSTEMDec 04, 09Jun 10, 10KEJR, INC.