Description
Class E21B : EARTH OR ROCK DRILLING
Subclass 3/025: Rotary drilling (drives used in the borehole E21B 4/00; rotary drilling machines in general B23B) Surface drives for rotary drilling with a to-and-fro rotation of the tool
E21B 3/025
Sub-Class
Stats
- 14 US PATENTS IN FORCE
- 1 US APPLICATIONS PENDING
- 1 Total Patent Owners
- 57 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11834921 | Arrangement of a ground drilling device, method for operating a ground drilling device and use of an arrangement of a ground drilling device | Jan 24, 22 | Dec 05, 23 | Tracto-Technik GmbH & Co. KG |
| 11773711 | Wellbore friction depth sounding by oscillating a drill string or casing | Jun 07, 21 | Oct 03, 23 | Magnetic Variation Services, LLC |
| 11767749 | Inertial compensation for a quill oscillator | Apr 13, 21 | Sep 26, 23 | Ensign Drilling Inc. |
| 11486245 | Micro-rotating drilling method in directional drilling, computer device and readable storage medium | May 26, 20 | Nov 01, 22 | BEIJING ZHONGSHENGGAOKE ENERGY; BEIJING MOLECULE SCIENCE AND TECHNOLOGY CO. LTD.; |
| 11352871 | Slide drilling overshot control | May 11, 20 | Jun 07, 22 | Schlumberger Technology Corporation |
| 11346164 | Sequencing for pipe handling | Mar 23, 20 | May 31, 22 | Schlumberger Technology Corporation |
| 11306537 | Induced drilling method for inertia constrained implicated motion and inertial constraint induced drilling device | Jul 09, 18 | Apr 19, 22 | XI'AN MANYUAN ELECTROMECHANICAL EQUIPMENT CO., LTD. |
| 11220865 | Downhole drilling apparatus with rotatable cutting element | Feb 25, 19 | Jan 11, 22 | Dowell -- A Division of Schlumberger Technology Corporation |
| 11136826 | Guidance systems and apparatus for power swivel | Nov 21, 16 | Oct 05, 21 | NATIONAL OILWELL VARCO L.P. |
| 10844703 | System and method for downlink communication | Feb 23, 17 | Nov 24, 20 | SANVEAN TECHNOLOGIES LLC |
| 10767335 | Attachment for drilling and/or foundation work | Feb 22, 19 | Sep 08, 20 | Liebherr-Werk Nenzing GmbH |
| 10590713 | Soil boring device and a kit including the same | Aug 14, 18 | Mar 17, 20 | Not available |
| 10151191 | Apparatus, rock drilling rig and method for rock drilling | Sep 14, 16 | Dec 11, 18 | Sandvik Mining and Construction Oy |
| 9850708 | Drill string sub | Aug 18, 14 | Dec 26, 17 | NABORS DRILLING TECHNOLOGIES USA, INC. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2020/0095,829 | DIRECT WRAP MEASUREMENT DURING CONNECTION FOR OPTIMAL SLIDE DRILLING | Sep 24, 18 | Mar 26, 20 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 28 Months (last 2 years Issuances)
- 28 Months (last 5 years Issuances)