E21B 19/16
Connecting or disconnecting pipe couplings or joints
Official title: Connecting or disconnecting pipe couplings or joints (E21B19/20 takes precedence)
E21B19/16 (Connecting or disconnecting pipe couplings or joints) appears on 1,859 US grants and 1,691 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,859
- Published applications
- 1,691
- Assignees
- 562
- Inventors
- 2,387
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 9 | 0 |
| 1978 | 15 | 0 |
| 1979 | 7 | 0 |
| 1980 | 13 | 0 |
| 1981 | 17 | 0 |
| 1982 | 15 | 0 |
| 1983 | 10 | 0 |
| 1984 | 28 | 0 |
| 1985 | 15 | 0 |
| 1986 | 27 | 0 |
| 1987 | 28 | 0 |
| 1988 | 19 | 0 |
| 1989 | 20 | 0 |
| 1990 | 8 | 0 |
| 1991 | 16 | 0 |
| 1992 | 18 | 0 |
| 1993 | 16 | 0 |
| 1994 | 9 | 0 |
| 1995 | 14 | 0 |
| 1996 | 12 | 0 |
| 1997 | 13 | 0 |
| 1998 | 19 | 0 |
| 1999 | 10 | 0 |
| 2000 | 23 | 0 |
| 2001 | 28 | 7 |
| 2002 | 29 | 28 |
| 2003 | 24 | 39 |
| 2004 | 35 | 42 |
| 2005 | 23 | 42 |
| 2006 | 42 | 32 |
| 2007 | 39 | 50 |
| 2008 | 29 | 51 |
| 2009 | 22 | 54 |
| 2010 | 52 | 54 |
| 2011 | 45 | 65 |
| 2012 | 44 | 51 |
| 2013 | 54 | 101 |
| 2014 | 59 | 85 |
| 2015 | 68 | 89 |
| 2016 | 76 | 85 |
| 2017 | 72 | 95 |
| 2018 | 69 | 107 |
| 2019 | 107 | 123 |
| 2020 | 117 | 108 |
| 2021 | 94 | 104 |
| 2022 | 97 | 67 |
| 2023 | 79 | 51 |
| 2024 | 75 | 72 |
| 2025 | 63 | 35 |
| 2026 | 29 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Drilling machine attachment for loader6 Oct 2026US 12,753,656 B2The Charles Machine Works, Inc.
- Methods and systems for earth drilling6 Oct 2026US 12,753,664 B2Mhwirth AS
- Selectively powering an electrical submersible pump assembly15 Sep 2026US 12,735,964 B2Saudi Arabian Oil Company
- Method performed by a control device for controlling the feeding distance and feeding rate in a rock drilling unit, a rock drilling unit and a rock drilling rig8 Sep 2026US 12,729,619 B2Epiroc Rock Drills Aktiebolag
- Power tong apparatus and method of using same25 Aug 2026US 12,715,049 B2Premiere, Inc.
- Spring assist system with positional feedback for carriers of snubbing slip bowls1 Oct 2026US 2026/0298036 A1Consolidated Rig Works, L.P.
- System for lowering pipes in a pipe string1 Oct 2026US 2026/0298037 A1
- Backup wrench for power tong1 Oct 2026US 2026/0298038 A1Metalmecanica S.A.
- Automated tripping operation in a well system using encoders for multi-dimensional data acquisition1 Oct 2026US 2026/0298068 A1Halliburton Energy Services.Inc.
- Multi-purpose robot end effector for riser running process activities24 Sep 2026US 2026/0286790 A1Grant Prideco, lnc.
Most cited
By later US patents
- Well system221US 6,296,066 B1Halliburton Energy Services.Inc. · 2001
- Drilling of wells with top drive unit220US 4,449,596 AVarco International, Inc. · 1984
- Apparatus for handling well pipe213US 4,765,401 AVarco International, Inc. · 1988
- Top drive casing system213US 6,536,520 B1Weatherford/Lamb, Inc. · 2003
- Mechanized stand handling apparatus for drilling rigs197US 4,274,778 A1981