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Class Information
Number: 166/82.1
Name: Wells > Above ground apparatus > Releasable seal or cleaner disengaged by projection on inner member
Description: Above ground apparatus comprising a detachably connected flow preventing or enclosure device for tubing, pipe, rod, or wireline within a casing opened by a lug, movable rod, collar, trip member, or protuberance on the tubing, pipe, rod, or wireline to cause the device to be detached from the well.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7316271 |
Deformable member |
Jan. 8, 2008 |
| 6896049 |
Deformable member |
May. 24, 2005 |
| 6722426 |
Gasket with multiple sealing surfaces |
Apr. 20, 2004 |
| 6612371 |
Wellhead system comprising a sliding sleeve seal |
Sep. 2, 2003 |
| 6155358 |
Wiper device for stripping drilling fluid from rig drill string |
Dec. 5, 2000 |
| 6059052 |
External pipe wiping apparatus and method of pulling and wiping a pipe string |
May. 9, 2000 |
| 6024172 |
Blow-out preventer |
Feb. 15, 2000 |
| 5921316 |
Automatic drill pipe cleaning system and method of use |
Jul. 13, 1999 |
| 5509477 |
Borehole ventilation sealcover |
Apr. 23, 1996 |
| 5323854 |
Tubing hanger seal for water wells |
Jun. 28, 1994 |
| 5305839 |
Turbine pump ring for drilling heads |
Apr. 26, 1994 |
| 5101896 |
Pipe wiper and washer system |
Apr. 7, 1992 |
| 4981174 |
Leakproof stuffing box with external lubrication for polish rod |
Jan. 1, 1991 |
| 4971148 |
Flow diverter |
Nov. 20, 1990 |
| 4923005 |
System for handling reeled tubing |
May. 8, 1990 |
| 4895205 |
Pipe washer and chemical applicator system |
Jan. 23, 1990 |
| 4860826 |
Apparatus for sealing a tubing string in a high pressure wellbore |
Aug. 29, 1989 |
| 4716962 |
Stripping gland |
Jan. 5, 1988 |
| 4690213 |
Pneumatic pipe wiper system |
Sep. 1, 1987 |
| 4552213 |
Wellhead apparatus |
Nov. 12, 1985 |
| 4440232 |
Well pressure compensation for blowout preventers |
Apr. 3, 1984 |
| 4398599 |
Rotating blowout preventor with adaptor |
Aug. 16, 1983 |
| 4362210 |
Friction hold wear bushing |
Dec. 7, 1982 |
| 4307783 |
Method and apparatus for conducting wireline operations during blowout conditions in oil and gas wells |
Dec. 29, 1981 |
| 4162704 |
Pressure control device |
Jul. 31, 1979 |
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