E21B 33/068
Having provision for introducing objects or fluids into, or removing objects from
Official title: having provision for introducing objects or fluids into, or removing objects from, wells (cementing-heads E21B33/05)
E21B33/068 (Having provision for introducing objects or fluids into, or removing objects from) appears on 1,531 US grants and 1,299 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,531
- Published applications
- 1,299
- Assignees
- 464
- Inventors
- 2,139
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 9 | 0 |
| 1978 | 11 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 17 | 0 |
| 1982 | 6 | 0 |
| 1983 | 19 | 0 |
| 1984 | 12 | 0 |
| 1985 | 12 | 0 |
| 1986 | 19 | 0 |
| 1987 | 16 | 0 |
| 1988 | 9 | 0 |
| 1989 | 21 | 0 |
| 1990 | 17 | 0 |
| 1991 | 11 | 0 |
| 1992 | 13 | 0 |
| 1993 | 17 | 0 |
| 1994 | 9 | 0 |
| 1995 | 12 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 21 | 0 |
| 1999 | 15 | 0 |
| 2000 | 17 | 0 |
| 2001 | 21 | 2 |
| 2002 | 23 | 28 |
| 2003 | 25 | 34 |
| 2004 | 32 | 37 |
| 2005 | 15 | 19 |
| 2006 | 29 | 26 |
| 2007 | 20 | 20 |
| 2008 | 24 | 52 |
| 2009 | 28 | 39 |
| 2010 | 40 | 60 |
| 2011 | 35 | 61 |
| 2012 | 46 | 49 |
| 2013 | 36 | 63 |
| 2014 | 56 | 65 |
| 2015 | 71 | 68 |
| 2016 | 60 | 70 |
| 2017 | 52 | 77 |
| 2018 | 63 | 76 |
| 2019 | 83 | 74 |
| 2020 | 92 | 105 |
| 2021 | 82 | 69 |
| 2022 | 79 | 55 |
| 2023 | 61 | 61 |
| 2024 | 74 | 47 |
| 2025 | 48 | 31 |
| 2026 | 23 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods of deploying a wiper plug in a downhole tubular string6 Oct 2026US 12,753,670 B1Halliburton Energy Services.Inc.
- Hydraulic fracturing plan and execution of same8 Sep 2026US 12,729,600 B2Downing Wellhead Equipment, LLC
- Hydraulic actuated tool catcher25 Aug 2026US 12,716,329 B2Schlumberger Technology Corporation
- Wireline derrick, system, and process4 Aug 2026US 12,698,691 B2
- Vent sub for lubricator21 Jul 2026US 12,687,083 B2Downing Wellhead Equipment, LLC
- Wellhead flow block and flow control mechanisms8 Oct 2026US 2026/0308998 A1Flowco MasterCo LLC
- Methods and systems for performing hydraulic fracturing operations8 Oct 2026US 2026/0309013 A1ExxonMobil Technology and Engineering Company
- Systems and methods for recovering ammonia from a subsurface formation13 Aug 2026US 2026/0235015 A1King Fahd University of Petroleum and Minerals
- Annular flow lubricator method and apparatus9 Jul 2026US 2026/0193954 A1Epic Lift Systems
- Wellhead apparatus lifting method and associated apparatus2 Jul 2026US 2026/0185415 A1Wellvene Limited
Most cited
By later US patents
- Method for running downhole tools and devices with coiled tubing276US 5,435,395 AHalliburton Company · 1995
- Injector unit184US 4,574,880 AHalliburton Company · 1986
- Manifold trailer having a single high pressure output manifold179US 9,995,102 B2Forum US, Inc. · 2018
- Deployment/retrieval method and apparatus for well tools used with coiled tubing162US 4,940,095 ADowell Schlumberger Incorporated · 1990
- Apparatus and method for treatment of wells143US 4,828,033 ADowell Schlumberger Incorporated · 1989