E21B 17/1014
Flexible or expansible centering means
Official title: {Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well (E21B17/1042 takes precedence)}
E21B17/1014 (Flexible or expansible centering means) appears on 851 US grants and 674 published applications in this corpus.
Search patents in E21B- Granted patents
- 851
- Published applications
- 674
- Assignees
- 295
- Inventors
- 1,275
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 12 | 0 |
| 1986 | 7 | 0 |
| 1987 | 13 | 0 |
| 1988 | 11 | 0 |
| 1989 | 21 | 0 |
| 1990 | 12 | 0 |
| 1991 | 7 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 22 | 0 |
| 1995 | 5 | 0 |
| 1996 | 13 | 0 |
| 1997 | 9 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 11 | 0 |
| 2001 | 19 | 6 |
| 2002 | 14 | 12 |
| 2003 | 16 | 16 |
| 2004 | 8 | 23 |
| 2005 | 11 | 11 |
| 2006 | 21 | 19 |
| 2007 | 19 | 12 |
| 2008 | 7 | 23 |
| 2009 | 10 | 21 |
| 2010 | 22 | 25 |
| 2011 | 24 | 25 |
| 2012 | 18 | 22 |
| 2013 | 17 | 29 |
| 2014 | 30 | 30 |
| 2015 | 25 | 52 |
| 2016 | 25 | 42 |
| 2017 | 32 | 34 |
| 2018 | 46 | 39 |
| 2019 | 27 | 42 |
| 2020 | 41 | 39 |
| 2021 | 43 | 45 |
| 2022 | 40 | 31 |
| 2023 | 38 | 32 |
| 2024 | 39 | 23 |
| 2025 | 21 | 12 |
| 2026 | 15 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Indexing control system11 Aug 2026US 12,704,034 B2Arrival Energy Solutions Inc.
- Locator for survey apparatus2 Jun 2026US 12,644,345 B2Imdex Technologies Pty Ltd
- Drilling apparatus and related methods12 May 2026US 12,624,599 B2Helmerich & Payne Technologies, LLC
- Well tool with an angle orienting feature12 May 2026US 12,624,605 B2Well Conveyor AS
- Centralizer with integral stop collar1 Oct 2026US 2026/0298035 A1Centergenics, LLC
- Expanding metal for plug and abandonment20 Aug 2026US 2026/0243144 A1Halliburton Energy Services.Inc.
- Systems and methods for steering a downhole tool6 Aug 2026US 2026/0226797 A1Schlumberger Technology Corporation
- High expansion centralizer16 Jul 2026US 2026/0201756 A1Schlumberger Technology Corporation
- Centralizer for A Tool in A Drill Collar25 Jun 2026US 2026/0176926 A1Nabors Drilling Technologies USA, Inc.
Most cited
By later US patents
- Expandable underreamer/stabilizer271US 6,732,817 B2Smith International, Inc. · 2004
- Steerable rotary drilling systems259US 5,706,905 ACamco Drilling Group Limited of Hycalog · 1998
- Downhole tools using artificial intelligence based control225US 5,947,213 AIntelligent Inspection Corporation · 1999
- Modulated bias unit for rotary drilling223US 5,520,255 ACamco Drilling Group Limited · 1996
- Rotary steerable well drilling system utilizing sliding sleeve213US 6,158,529 ASchlumberger Technology Corporation · 2000