E21B 19/08
Apparatus for feeding the rods or cables
Official title: Apparatus for feeding the rods or cables (E21B19/22 takes precedence; automatic feed E21B44/02); Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
E21B19/08 (Apparatus for feeding the rods or cables) appears on 1,056 US grants and 759 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,056
- Published applications
- 759
- Assignees
- 456
- Inventors
- 1,765
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 33 | 0 |
| 1977 | 23 | 0 |
| 1978 | 22 | 0 |
| 1979 | 12 | 0 |
| 1980 | 13 | 0 |
| 1981 | 21 | 0 |
| 1982 | 15 | 0 |
| 1983 | 13 | 0 |
| 1984 | 21 | 0 |
| 1985 | 14 | 0 |
| 1986 | 15 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 16 | 0 |
| 1990 | 12 | 0 |
| 1991 | 19 | 0 |
| 1992 | 8 | 0 |
| 1993 | 16 | 0 |
| 1994 | 12 | 0 |
| 1995 | 8 | 0 |
| 1996 | 13 | 0 |
| 1997 | 13 | 0 |
| 1998 | 16 | 0 |
| 1999 | 13 | 0 |
| 2000 | 22 | 0 |
| 2001 | 25 | 4 |
| 2002 | 14 | 6 |
| 2003 | 12 | 17 |
| 2004 | 10 | 18 |
| 2005 | 15 | 14 |
| 2006 | 14 | 12 |
| 2007 | 13 | 15 |
| 2008 | 4 | 20 |
| 2009 | 13 | 24 |
| 2010 | 14 | 25 |
| 2011 | 15 | 24 |
| 2012 | 18 | 11 |
| 2013 | 15 | 35 |
| 2014 | 24 | 37 |
| 2015 | 24 | 34 |
| 2016 | 37 | 53 |
| 2017 | 43 | 48 |
| 2018 | 33 | 60 |
| 2019 | 54 | 56 |
| 2020 | 60 | 59 |
| 2021 | 44 | 44 |
| 2022 | 51 | 43 |
| 2023 | 39 | 25 |
| 2024 | 33 | 36 |
| 2025 | 29 | 18 |
| 2026 | 19 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 19/084With flexible drawing means278
- E21B 19/086With a fluid-actuated cylinder268
- E21B 19/09Specially adapted for drilling underwater formations from a floating support using heave208
- E21B 19/087By means of a swinging arm128
- E21B 19/083Cam, rack or like feed mechanisms81
- E21B 19/081Screw-and-nut feed mechanisms26
- E21B 19/089With a spring or an additional weight13
Recent patents
- Device for generating an axial load in a drill string assembly6 Oct 2026US 12,753,660 B2Pgi Holding Limited
- Heave compensator enabling active heave counteraction15 Sep 2026US 12,735,302 B2Ernst-B. Johansen AS
- Automated drilling arrangement1 Sep 2026US 12,723,476 B2
- Drilling and bolting tool18 Aug 2026US 12,709,981 B2Joy Global Underground Mining LLC
- Spring bail cylinder apparatus11 Aug 2026US 12,704,028 B2
- Pipe loader apparatus8 Oct 2026US 2026/0308992 A1The Charles Machine Works, Inc.
- Guiding assembly and a rock drilling apparatus comprising the same8 Oct 2026US 2026/0308993 A1Sandvik Mining and Construction Oy
- System for lowering pipes in a pipe string1 Oct 2026US 2026/0298037 A1
- Bolter24 Sep 2026US 2026/0286845 A1Joy Global Underground Mining LLC
- End effectors for automated pipe handling27 Aug 2026US 2026/0251024 A1National Oilwell Varco, L. P.
Most cited
By later US patents
- Well system221US 6,296,066 B1Halliburton Energy Services.Inc. · 2001
- Well system175US 7,172,038 B2Halliburton Energy Services.Inc. · 2007
- Pipe running tool166US 6,443,241 B1Varco I/P, Inc. · 2002
- Draw-works and method for operating the same154US 10,138,098 B2National Oilwell Varco Norway AS · 2018
- Top drive well casing system and method152US 6,679,333 B2Canrig Drilling Technology Ltd. · 2004