Multiple sleeve valve assembly
AssigneeCor-Val, Inc.
InventorsBobby J. Corte, Jr., Kane J. Corte
Life of this patent
Estimating the term…
Abstract
A valve includes a valve body having an upstream bore, a downstream bore, a fluid flow chamber and a valve seat useful for sealing the fluid flow chamber from the downstream bore. The valve also includes a valve stem, a bonnet connected to the valve body and adapted to receive the valve stem therethrough, and a plurality of sealing assemblies operably connected to the valve stem.
Claims41
A balanced control valve, comprising:
- a choke body having an upstream bore, a downstream bore a fluid flow chamber, and a valve seat useful in sealing the fluid flow chamber from the downstream bore;
- a bonnet connected to the choke body and adapted to receive a valve stem therethrough;
- a valve stem disposed through the bonnet and having a plurality of balanced sealing assemblies operably connected thereto, wherein the plurality of balanced sealing assemblies comprises an inner sealing assembly and an outer sealing assembly;
- and
- a first balance chamber, wherein the inner sealing assembly includes at least one balance conduit capable of communicating fluid between the downstream bore and the first balance chamber.
A balanced pressure control valve, comprising:
- a plurality of sealing assemblies in a single valve trim, wherein each of the plurality of sealing assemblies is a balanced sealing assembly, and
- wherein the plurality of sealing assemblies comprises an outer sealing assembly having a sealing member capable of sealing engagement with a valve seat associated with the control valve, and an inner sealing assembly in sliding engagement with the outer sealing assembly, and having a sealing member capable of sealing engagement with the valve seat.
A control valve comprising a plurality of sealing assemblies in a single choke trim, wherein each of the plurality of sealing assemblies is a balanced sealing assembly, the plurality of sealing assemblies comprising:
- an outer sealing assembly having a sealing member adapted for sealing engagement with an outer sealing surface of a valve seat associated with the control valve, and also having a balance conduit therethrough for communicating downstream fluid pressure to a balance chamber associated with the outer sealing assembly;
- and
- an inner sealing assembly in sliding engagement with the outer sealing assembly, and having a sealing member adapted for sealing engagement with an inner sealing surface of the valve seat, and also having a balance conduit therethrough for communicating downstream fluid pressure to a balance chamber associated with the inner sealing assembly.
A seal arrangement for a valve, the valve capable of being disposed between first and second fluid flow conduits, the valve and first fluid flow conduit associated with a flow control orifice, the valve having a valve body and a valve closure assembly, the valve closure assembly capable of varying the quantity of fluid flowing through the valve between the first and second fluid flow conduits, the seal arrangement comprising:
- first and second annular seals disposed upon the valve closure assembly and engageable around the flow control orifice;
- said first annular seal being constructed at least partially of substantially rigid, wear resistant, non-elastomeric material;
- and
- said second annular seal disposed between said first annular seal and the valve body and constructed at least partially of elastomeric material.
An apparatus for enabling a valve to be balanced, the valve having a valve body, the valve further having first and second plugs in a single valve trim, the first and second plugs each having first and second upper surfaces and being capable of being reciprocated within the valve body, the valve connectable between first and second fluid flow conduits, the apparatus comprising:
- a first annular chamber disposed within the valve body adjacent to the first upper surface of the first plug;
- a second armular chamber disposed within the valve body adjacent to the second upper surface of the first plug and in fluid communication with the second fluid flow conduit;
- a cavity disposed within the valve body between the first plug and the first upper surface of the second plug;
- a third annular chamber disposed within the valve body between the first plug and the second upper surface of the second plug;
- the second plug having at least one passageway capable of communicating fluid from at least the first fluid flow conduit to said third annular chamber;
- the first plug having at least one passage capable of communicating fluid from said third annular chamber to said first annular chamber;
- and
- the first plug having at least one other passage capable of communicating fluid from said second annular chamber to said cavity.
Dependencies are inferred from the claim text.