E21B 33/0422
A suspended tubing or casing being gripped by a slip or an
Official title: {a suspended tubing or casing being gripped by a slip or an internally serrated member}
E21B33/0422 (A suspended tubing or casing being gripped by a slip or an) appears on 155 US grants and 120 published applications in this corpus.
Search patents in E21B- Granted patents
- 155
- Published applications
- 120
- Assignees
- 70
- Inventors
- 291
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 3 |
| 2004 | 0 | 2 |
| 2005 | 1 | 4 |
| 2006 | 4 | 2 |
| 2007 | 1 | 3 |
| 2008 | 4 | 3 |
| 2009 | 1 | 1 |
| 2010 | 2 | 3 |
| 2011 | 2 | 5 |
| 2012 | 2 | 1 |
| 2013 | 5 | 6 |
| 2014 | 3 | 3 |
| 2015 | 4 | 6 |
| 2016 | 2 | 7 |
| 2017 | 8 | 8 |
| 2018 | 5 | 5 |
| 2019 | 4 | 5 |
| 2020 | 6 | 5 |
| 2021 | 4 | 7 |
| 2022 | 3 | 5 |
| 2023 | 7 | 10 |
| 2024 | 7 | 10 |
| 2025 | 12 | 7 |
| 2026 | 8 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic spider tubular centering systems and methods for use thereof22 Sep 2026US 12,742,359 B2Forum US, Inc.
- Bi-directional wellhead annulus packoff with integral seal and hanger lockdown ring21 Apr 2026US 12,607,082 B2Baker Hughes Oilfield Operations LLC
- Wellhead attachment system21 Apr 2026US 12,607,083 B2Vault Pressure Control LLC
- Automatic setting support for a slip hanger31 Mar 2026US 12,590,502 B2Baker Hughes Pressure Control LLC
- Arranged profiled plates and load relief plates for oilfield equipment24 Mar 2026US 12,584,366 B2Baker Hughes Pressure Control LLC
- Spring assist system with positional feedback for carriers of snubbing slip bowls1 Oct 2026US 2026/0298036 A1Consolidated Rig Works, L.P.
- Wellhead attachment system30 Jul 2026US 2026/0218582 A1Vault Pressure Control LLC
- Wellhead attachment system30 Jul 2026US 2026/0218583 A1Vault Pressure Control LLC
- One trip slim wellhead systems and methods16 Jul 2026US 2026/0201766 A1Cameron International Corporation
- Arranged profiled plates and load relief plates for oilfield equipment25 Jun 2026US 2026/0176931 A1Baker Hughes Pressure Control LLC
Most cited
By later US patents
- Technique for running casing139US 4,100,968 A1978
- Tubing anchor assembly116US 4,646,827 A1987
- Methods and apparatus for handling and drilling with tubulars or casing105US 7,325,610 B2Weatherford/Lamb, Inc. · 2008
- Wellhead connector102US 5,332,043 AABB Vetco Gray Inc. · 1994
- Drive pipe adaptor83US 4,936,382 ASeaboard-Arval Corporation · 1990