F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
137/14
F04B 53/10 (2006.01) E21B 34/06 (2006.01) E21B 43/38 (2006.01) F04B 53/12 (2006.01)
Patent
CA 2003438
This invention is of a selective valve to pass fluids and consists of a body, and a housing, and is provided above and in the middle with a communicating passage for low surface tension and viscosity fluid, there being shells inside, seated upon the aforesaid housing, said shells consisting of a surface of a shape and a size that is controlled, a soft surface, and orifices, a sealing surface created in the contact area of the aforesaid shells where it meets the aforesaid housing, and there being, below and in the middle, a communicating passage in touch with the fluid compressed by the pump. Preferred versions of the aforesaid selective valve are also covered, provided with controlling blades and a ball and roughness controlling surfaces instead of the shells.
Gowling Lafleur Henderson Llp
Petroleo Brasileiro S.a. - Petrobras
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