E21B 4/003
Bearing, sealing, lubricating details
Official title: {Bearing, sealing, lubricating details (for roller bits E21B10/22)}
E21B4/003 (Bearing, sealing, lubricating details) appears on 566 US grants and 437 published applications in this corpus.
Search patents in E21B- Granted patents
- 566
- Published applications
- 437
- Assignees
- 216
- Inventors
- 762
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 9 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 10 | 0 |
| 1982 | 7 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 11 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 5 | 1 |
| 2003 | 2 | 4 |
| 2004 | 2 | 0 |
| 2005 | 2 | 4 |
| 2006 | 3 | 6 |
| 2007 | 3 | 4 |
| 2008 | 1 | 5 |
| 2009 | 5 | 9 |
| 2010 | 7 | 6 |
| 2011 | 6 | 12 |
| 2012 | 7 | 17 |
| 2013 | 12 | 20 |
| 2014 | 19 | 26 |
| 2015 | 24 | 34 |
| 2016 | 29 | 36 |
| 2017 | 28 | 29 |
| 2018 | 31 | 41 |
| 2019 | 43 | 36 |
| 2020 | 47 | 34 |
| 2021 | 35 | 31 |
| 2022 | 23 | 21 |
| 2023 | 35 | 25 |
| 2024 | 23 | 16 |
| 2025 | 17 | 13 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Shock mounting of a motor in a downhole tool28 Jul 2026US 12,692,748 B2King Southwest & Consulting of Cypress
- Hydraulic motor14 Jul 2026US 12,680,384 B2
- Mechanical hydraulic torque converter for horizontal well23 Jun 2026US 12,662,879 B2
- Pack system for a downhole assembly16 Jun 2026US 12,655,688 B2Park City Drilling Technologies LLC
- Methods of manufacturing combination thrust-bearing and radial bearing apparatuses16 Jun 2026US 12,655,869 B2US Synthetic Corporation
- Seal assemblies for rotary control devices (rcd) of drilling systems and related methods24 Sep 2026US 2026/0286779 A1Schlumberger Technology Corporation
- Rotating control device assembly for use with a subterranean well20 Aug 2026US 2026/0243142 A1
- Downhole positive displacement motor and associated systems and methods23 Jul 2026US 2026/0210185 A1Ensign Energy Services
- Shock mounting of a motor in a downhole tool18 Jun 2026US 2026/0168328 A1King Southwest & Consulting of Cypress
- Force coupling assemblies and related systems and methods21 May 2026US 2026/0139709 A1US Synthetic Corporation
Most cited
By later US patents
- Composite polycrystalline diamond compact502US 4,604,106 ASmith International, Inc. · 1986
- Thrust bearing assembly for a downhole drill motor475US 4,560,014 ASmith International, Inc. · 1985
- Diamond thrust bearing and method for manufacturing same434US 5,092,687 AAnadrill, Inc. · 1992
- Well drilling tool with diamond radial/thrust bearings383US 4,410,054 AMaurer Engineering Inc. · 1983
- Diamond bearing assembly334US 5,364,192 A1994