E21B 17/10
Wear protectors
Official title: Wear protectors; Centralising devices {, e.g. stabilisers}
E21B17/10 (Wear protectors) appears on 3,028 US grants and 2,519 published applications in this corpus.
Search patents in E21B- Granted patents
- 3,028
- Published applications
- 2,519
- Assignees
- 989
- Inventors
- 4,435
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 24 | 0 |
| 1978 | 27 | 0 |
| 1979 | 12 | 0 |
| 1980 | 20 | 0 |
| 1981 | 27 | 0 |
| 1982 | 16 | 0 |
| 1983 | 20 | 0 |
| 1984 | 31 | 0 |
| 1985 | 27 | 0 |
| 1986 | 38 | 0 |
| 1987 | 33 | 0 |
| 1988 | 30 | 0 |
| 1989 | 42 | 0 |
| 1990 | 30 | 0 |
| 1991 | 34 | 0 |
| 1992 | 42 | 0 |
| 1993 | 36 | 0 |
| 1994 | 47 | 0 |
| 1995 | 26 | 0 |
| 1996 | 44 | 0 |
| 1997 | 33 | 0 |
| 1998 | 47 | 0 |
| 1999 | 43 | 0 |
| 2000 | 47 | 0 |
| 2001 | 62 | 22 |
| 2002 | 51 | 50 |
| 2003 | 48 | 63 |
| 2004 | 44 | 55 |
| 2005 | 32 | 48 |
| 2006 | 55 | 57 |
| 2007 | 50 | 53 |
| 2008 | 39 | 70 |
| 2009 | 38 | 73 |
| 2010 | 64 | 81 |
| 2011 | 61 | 91 |
| 2012 | 59 | 95 |
| 2013 | 57 | 103 |
| 2014 | 87 | 102 |
| 2015 | 91 | 170 |
| 2016 | 107 | 173 |
| 2017 | 123 | 147 |
| 2018 | 136 | 154 |
| 2019 | 144 | 152 |
| 2020 | 169 | 156 |
| 2021 | 158 | 157 |
| 2022 | 157 | 127 |
| 2023 | 139 | 116 |
| 2024 | 110 | 87 |
| 2025 | 96 | 75 |
| 2026 | 51 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 17/1014Flexible or expansible centering means851
- E21B 17/1078Stabilisers or centralisers for casing, tubing or drill pipes829
- E21B 17/1057Centralising devices with rollers or with a relatively rotating sleeve386
- E21B 17/1085Wear protectors270
- E21B 17/1035For plural rods, pipes or lines246
- E21B 17/1007For the internal surface of a pipe215
- E21B 17/1042Elastomer protector or centering means208
- E21B 17/1092Gauge section of drill bits207
Recent patents
- Tool string transportation device6 Oct 2026US 12,753,667 B2Petromac IP Limited
- Modular anti-rotation drilling systems and methods actuated by fluid pressure29 Sep 2026US 12,747,654 B1National Technology & Engineering Solutions of Sandia, LLC
- Systems and methods for estimating depth of wellbore survey measurements15 Sep 2026US 12,735,980 B1Schlumberger Technology Corporation
- Lead-free metallic barrier coatings for copper and zinc-rich surfaces of subterranean hardware and components8 Sep 2026US 12,729,443 B2Schlumberger Technology Corporation
- Tether roller apparatus18 Aug 2026US 12,709,948 B2Eddyfi Canada Inc.
- Vortex-induced vibration strake arrangements8 Oct 2026US 2026/0309253 A1Advanced Innergy Ltd.
- Centralizer with integral stop collar1 Oct 2026US 2026/0298035 A1Centergenics, LLC
- Work string tubing connection restoration24 Sep 2026US 2026/0284768 A1Postle Industries, Inc.
- Rod guide configurations for sucker rod pumps17 Sep 2026US 2026/0275816 A1Oilify Sucker Rod Inc.
- Alignment system and methodology utilizing rotating control device17 Sep 2026US 2026/0275817 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Insulated and/or concentric coiled tubing429US 6,015,015 ABJ Services Company, U.S.A. · 2000
- In situ thermal processing of a relatively permeable formation while controlling pressure306US 7,096,942 B1Shell Oil Company · 2006
- Expandable underreamer/stabilizer271US 6,732,817 B2Smith International, Inc. · 2004
- Steerable rotary drilling systems259US 5,706,905 ACamco Drilling Group Limited of Hycalog · 1998
- In situ thermal recovery from a relatively permeable formation with backproduction through a heater wellbore232US 6,964,300 B2Shell Oil Company · 2005