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US 4,926,898 AGranted
Safety choke valve
OwnerTed J. Sampeyinventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a safety chock valve having improved body top. An upper part of the valve body has a tapered wall cavity which receives in a sealed engagement a tapered lower part of the valve bonnet. An internally threaded cap member secures sealed position of the bonnet on the valve body. Even partial disengagement of the threads causes breaking of the sealed engagement and escape of pressure between the valve body and the bonnet.
Claims30
A safety choke comprising:
- a valve body having an inlet fluid flow passage and an outlet fluid flow passage arranged at a right angle to said inlet flow passage, the valve body being provided with a frustoconical cavity in a valve body top portion;
- a bonnet means having a frustoconical lower part matingly tapered to fit in a seated engagement within said cavity;
- and
- means for securing position of said bonnet means on said valve body, said bonnet being partially manually disengaged from said valve body to cause breaking of the seated engagement, so as to determine, by at least partial relief of pressure build up between the valve body and the bonnet, if an excessive pressure exists in the valve body, wherein when the excessive pressure is above a predetermined level said bonnet is prevented from being manually unseated thereby alerting an operator to relieve the pressure through an alternative pressure relief means.
1 more element
A safety choke comprising:
- a valve body having an inlet fluid flow passage and an outlet fluid flow passage arranged at a right angle to said inlet flow passage;
- means for regulating a fluid flow mounted within said valve body;
- a primary bleeder means communicating with said outlet passage;
- and
- a safety pressure detection/secondary bleeder means associated with a choke bonnet mounted in fluid communication with said outlet passage, said bonnet being partially manually disengaged from said valve body to cause fluid communication between said outlet passage and said secondary bleeder means, so as to determine, by at least partial relief of pressure build up between the valve body and the bonnet, if an excessive pressure exists in the valve body, wherein when the excessive pressure is above a predetermined level said bonnet is prevented from being manually unseated, thereby alerting an operator to relieve the pressure through the primary bleeder means.
2 more elements
A safety choke, comprising:
- a valve body having a main section and transverse section, each section being formed with an interior central passageway therethrough, the passageway of the transverse section forming an inlet passage, intersecting at a right angle the passageway of the main section, which forms a fluid outlet passage;
- a primary bleeder means comprising a passage in fluid communication with the main section passageway;
- and
- a valve bonnet engaged with an upper end of the valve main section, said bonnet movable between a first seated position and a second unseated position to allow pressure detection and secondary bleeding of pressure built within the valve body, said bonnet being partially manually disengaged from said valve body to cause the second unseated position, so as to determine, by at least partial relief of pressure build up between the valve body and the bonnet, if an excessive pressure exists in the valve body, wherein when the excessive pressure is above a predetermined level said bonnet is prevented from being manually unseated, thereby alerting an operator to relieve the pressure through the primary bleeder means.
1 more element
Dependencies are inferred from the claim text.