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Class Information
Number: 166/84.4
Name: Wells > Above ground apparatus > With seal for reciprocating member > Fluid pressure actuated seals
Description: Reciprocating member seal wherein the flow prevention device is moved to a pipe engaging position by liquid or gas force.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7413023 |
Wellhead seal unit |
Aug. 19, 2008 |
| 7380590 |
Rotating pressure control head |
Jun. 3, 2008 |
| 7343969 |
Secondary packing arrangement for reciprocating pump polished rod |
Mar. 18, 2008 |
| 7165610 |
Removable seal |
Jan. 23, 2007 |
| 7108058 |
Packing assembly for rotary drilling swivels and pumps having rotating shafts |
Sep. 19, 2006 |
| 7080685 |
High pressure rotating drilling head assembly with hydraulically removable packer |
Jul. 25, 2006 |
| 7044217 |
Stuffing box for progressing cavity pump drive |
May. 16, 2006 |
| 7040394 |
Active/passive seal rotating control head |
May. 9, 2006 |
| 6955225 |
Method of and apparatus for securing capillary tubing in a wellhead |
Oct. 18, 2005 |
| 6953085 |
Well pressure activated pack-off head |
Oct. 11, 2005 |
| 6910531 |
Rotating drilling stripper |
Jun. 28, 2005 |
| 6904982 |
Subsea mud pump and control system |
Jun. 14, 2005 |
| 6896076 |
Rotating drilling head gripper |
May. 24, 2005 |
| 6880634 |
Coiled tubing acoustic telemetry system and method |
Apr. 19, 2005 |
| 6843313 |
Pump drive head with stuffing box |
Jan. 18, 2005 |
| 6840327 |
Annular pressure spool |
Jan. 11, 2005 |
| 6702012 |
High pressure rotating drilling head assembly with hydraulically removable packer |
Mar. 9, 2004 |
| 6588502 |
Well pressure activated pack-off head |
Jul. 8, 2003 |
| 6547002 |
High pressure rotating drilling head assembly with hydraulically removable packer |
Apr. 15, 2003 |
| 6520253 |
Rotating drilling head system with static seals |
Feb. 18, 2003 |
| 6505691 |
Subsea mud pump and control system |
Jan. 14, 2003 |
| 6439302 |
Stripper packer |
Aug. 27, 2002 |
| 6167959 |
Adjustable stuffing boxes for pump rods |
Jan. 2, 2001 |
| 6024172 |
Blow-out preventer |
Feb. 15, 2000 |
| 5848643 |
Rotating blowout preventer |
Dec. 15, 1998 |
| 5636688 |
Self aligning stuffing box for pumpjack units |
Jun. 10, 1997 |
| 5615736 |
Unitary diversionary-tubing hanger and energizable rod seal |
Apr. 1, 1997 |
| 5361832 |
Annular packer and insert |
Nov. 8, 1994 |
| 5343944 |
Self aligning stuffing box for pumpjack units |
Sep. 6, 1994 |
| 5058903 |
Drill rod seal |
Oct. 22, 1991 |
| 5048603 |
Lubricator corrosion inhibitor treatment |
Sep. 17, 1991 |
| 4949785 |
Force-limiting/wear compensating annular sealing element for blowout preventers |
Aug. 21, 1990 |
| 4828024 |
Diverter system and blowout preventer |
May. 9, 1989 |
| 4690213 |
Pneumatic pipe wiper system |
Sep. 1, 1987 |
| 4626135 |
Marine riser well control method and apparatus |
Dec. 2, 1986 |
| 4566494 |
Vent line system |
Jan. 28, 1986 |
| 4546828 |
Diverter system and blowout preventer |
Oct. 15, 1985 |
| 4541490 |
Adapter for a wellhead |
Sep. 17, 1985 |
| 4522368 |
Closure device |
Jun. 11, 1985 |
| 4502534 |
Flow diverter |
Mar. 5, 1985 |
| 4456062 |
Flow diverter |
Jun. 26, 1984 |
| 4456063 |
Flow diverter |
Jun. 26, 1984 |
| 4448255 |
Rotary blowout preventer |
May. 15, 1984 |
| 4444401 |
Flow diverter seal with respective oblong and circular openings |
Apr. 24, 1984 |
| 4444250 |
Flow diverter |
Apr. 24, 1984 |
| 4423775 |
Line stripper |
Jan. 3, 1984 |
| 4398599 |
Rotating blowout preventor with adaptor |
Aug. 16, 1983 |
| 4324422 |
Low torque pack-off seal assembly with retrievable lower section |
Apr. 13, 1982 |
| 4299395 |
Geothermal well head assembly |
Nov. 10, 1981 |
| 4289294 |
Wellhead flow control devices |
Sep. 15, 1981 |
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