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Class Information
Number: 166/368
Name: Wells > Submerged well > Wellhead
Description: Device comprising means at the top of the well, generally extending above the surface of the earth, adapted to cap the well, support the well structure inside a well casing, regulate the operation of the well, and/or supply well fluid for distribution.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7445046 |
Nested velocity string tubing hanger |
Nov. 4, 2008 |
| 7441594 |
Full bore wellhead load shoulder and support ring |
Oct. 28, 2008 |
| 7426963 |
Piggable flowline-riser system |
Sep. 23, 2008 |
| 7422066 |
System for direct vertical connection between contiguous subsea equipment and method of installation of said connection |
Sep. 9, 2008 |
| 7407011 |
Tubing annulus plug valve |
Aug. 5, 2008 |
| 7395864 |
Method and apparatus for preventing slug flow in pipelines |
Jul. 8, 2008 |
| 7380607 |
Casing hanger with integral load ring |
Jun. 3, 2008 |
| 7360601 |
Submersible well pump installation procedure |
Apr. 22, 2008 |
| 7331396 |
Subsea production systems |
Feb. 19, 2008 |
| 7325598 |
Vacuum assisted seal engagement for ROV deployed equipment |
Feb. 5, 2008 |
| 7314085 |
Well operations system |
Jan. 1, 2008 |
| 7314086 |
Well operations system |
Jan. 1, 2008 |
| 7314088 |
System for retrieving a tubular element from a well |
Jan. 1, 2008 |
| 7308943 |
Well operations system |
Dec. 18, 2007 |
| 7284615 |
Method and system for installing and maintaining a pipeline while minimizing associated ground disturbance |
Oct. 23, 2007 |
| 7275591 |
Tubing hanger with ball valve in production string |
Oct. 2, 2007 |
| 7234524 |
Subsea chemical injection unit for additive injection and monitoring system for oilfield operations |
Jun. 26, 2007 |
| 7231983 |
Split locking ring for wellhead components |
Jun. 19, 2007 |
| 7225873 |
Coiled tubing cutter |
Jun. 5, 2007 |
| 7225876 |
Connector assembly |
Jun. 5, 2007 |
| 7219741 |
Tubing annulus valve |
May. 22, 2007 |
| 7216699 |
Sub mudline abandonment connector |
May. 15, 2007 |
| 7216714 |
Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use |
May. 15, 2007 |
| 7201229 |
Tree mounted well flow interface device |
Apr. 10, 2007 |
| 7191837 |
Motion compensator |
Mar. 20, 2007 |
| 7165620 |
Wellhead completion system having a horizontal control penetrator and method of using same |
Jan. 23, 2007 |
| 7159663 |
Hybrid wellhead system and method of use |
Jan. 9, 2007 |
| 7152681 |
Method and arrangement for treatment of fluid |
Dec. 26, 2006 |
| 7150324 |
Method and apparatus for riserless drilling |
Dec. 19, 2006 |
| 7134498 |
Well drilling and completions system |
Nov. 14, 2006 |
| 7121346 |
Intervention spool for subsea use |
Oct. 17, 2006 |
| 7117945 |
Well operations system |
Oct. 10, 2006 |
| 7111687 |
Recovery of production fluids from an oil or gas well |
Sep. 26, 2006 |
| 7096957 |
Internal beam buoyancy system for offshore platforms |
Aug. 29, 2006 |
| 7096955 |
Long duration fuel cell system |
Aug. 29, 2006 |
| 7093660 |
Well operations system |
Aug. 22, 2006 |
| 7086467 |
Coiled tubing cutter |
Aug. 8, 2006 |
| 7073591 |
Casing hanger annulus monitoring system |
Jul. 11, 2006 |
| 7063160 |
Non-orienting tubing hanger system with a flow cage |
Jun. 20, 2006 |
| 7051804 |
Subsea protective cap |
May. 30, 2006 |
| 7044227 |
Subsea well injection and monitoring system |
May. 16, 2006 |
| 7040407 |
Collet load shoulder |
May. 9, 2006 |
| 7040408 |
Flowhead and method |
May. 9, 2006 |
| 7040412 |
Adjustable hanger system and method |
May. 9, 2006 |
| 7025133 |
Multiple bore christmas tree outlet |
Apr. 11, 2006 |
| 7025132 |
Flow completion apparatus |
Apr. 11, 2006 |
| 7025147 |
Apparatus for, and method of, landing items at a well location |
Apr. 11, 2006 |
| 7013970 |
Central circulation completion system |
Mar. 21, 2006 |
| 7000693 |
Control of hydrocarbon wells |
Feb. 21, 2006 |
| 6991039 |
Well operations system |
Jan. 31, 2006 |
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