Packers Or Plugs Patents (Class 166/179)
- Relatively movable packers or plugs (Class 166/119)
- Anchor actuated by fluid pressure (Class 166/120)
- With detachable setting means (Class 166/123)
- With controllable passage between central chamber and space below packer (Class 166/126)
- With controllable bypass outside central conduit (Class 166/129)
- With controllable passage between central conduit and space above packer or plug (Class 166/131)
- Portion extends beyond end of surrounding conduit (Class 166/132)
- With controllable passage through packer (Class 166/133)
- Support and holddown expanding anchors (Class 166/134)
- Flow stopping type, e.g., plug (Class 166/135)
- Spring set anchor (Class 166/136)
- Wedge or cam and friction drag (Class 166/138)
- Central conduit detachable (Class 166/143)
- Bypass closing and passage opening to upward flow constrained to occur simultaneously (Class 166/145)
- Passage connects with space below packers and continuously open passageway connects with space between packers (Class 166/146)
- Passage connects with space between packer or plug seals (Class 166/147)
- Upwardly biased check valve and means for opening or bypassing it (Class 166/148)
- With passageway between central chamber and space above packer (Class 166/149)
- Passage controllable by movement of central chamber (Class 166/152)