E21B 19/10
Slips
Official title: Slips; Spiders {; Catching devices (rotary tables with master bushing or kelly bushing E21B3/04)}
E21B19/10 (Slips) appears on 335 US grants and 311 published applications in this corpus.
Search patents in E21B- Granted patents
- 335
- Published applications
- 311
- Assignees
- 167
- Inventors
- 516
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 6 | 1 |
| 2002 | 7 | 5 |
| 2003 | 5 | 9 |
| 2004 | 3 | 11 |
| 2005 | 8 | 10 |
| 2006 | 11 | 5 |
| 2007 | 6 | 8 |
| 2008 | 9 | 6 |
| 2009 | 2 | 4 |
| 2010 | 7 | 6 |
| 2011 | 8 | 10 |
| 2012 | 5 | 12 |
| 2013 | 6 | 10 |
| 2014 | 8 | 20 |
| 2015 | 11 | 25 |
| 2016 | 19 | 16 |
| 2017 | 20 | 14 |
| 2018 | 12 | 20 |
| 2019 | 14 | 17 |
| 2020 | 21 | 23 |
| 2021 | 22 | 19 |
| 2022 | 15 | 15 |
| 2023 | 15 | 7 |
| 2024 | 12 | 9 |
| 2025 | 12 | 14 |
| 2026 | 12 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tubular handling with spider control system6 Oct 2026US 12,753,661 B2Weatherford Technology Holdings, LLC
- Method to extend PDC bit life and improve drilling speed by mitigating slip-stick29 Sep 2026US 12,747,637 B2
- Drilling system and method of operating a drilling system29 Sep 2026US 12,747,644 B2Mhwirth AS
- Hydraulic spider tubular centering systems and methods for use thereof22 Sep 2026US 12,742,359 B2Forum US, Inc.
- Method and apparatus for moving tubular rotary slips25 Aug 2026US 12,716,301 B2Helmerich & Payne, Inc.
- Spring assist system with positional feedback for carriers of snubbing slip bowls1 Oct 2026US 2026/0298036 A1Consolidated Rig Works, L.P.
- In-slips acoustic communications17 Sep 2026US 2026/0275861 A1Baker Hughes Oilfield Operations LLC
- Hydraulic spider system and methods for use thereof27 Aug 2026US 2026/0251023 A1Forum US, Inc.
- Retention system for retaining deck bushing of drilling machine13 Aug 2026US 2026/0234997 A1Caterpillar Global Mining Equipment LLC
- Retention system for retaining deck bushing of drilling machine13 Aug 2026US 2026/0235002 A1Caterpillar Global Mining Equipment LLC
Most cited
By later US patents
- Casing clamp203US 6,311,792 B1Tesco Corporation · 2001
- Apparatus for gripping a down hole tubular for support and rotation176US 5,297,833 AW-N Apache Corporation · 1994
- Wellbore circulation system136US 6,412,554 B1Weatherford/Lamb, Inc. · 2002
- Top head drive assembly for earth drilling machine and components thereof124US 4,821,814 A501 W-N Apache Corporation · 1989
- Method of rotating a tubular member93US 5,746,276 AEckel Manufacturing Company, Inc. · 1998