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US 12,398,809 B2Granted
Dynamic slab gate valves
AssigneeBestway Oilfield, Inc.
InventorsDon Channing Gramlich, Mehul Jain
Life of this patent
Estimating the term…
Abstract
A dynamic slab gate valve for use in controlling fluid flow through pipelines and other tubulars has a dynamic seat assembly and a dynamic skirt assembly. The dynamic seat assembly is urged toward a gate of the dynamic slab gate valve by an energizer to maintain a seal between a seat and the gate. The dynamic skirt assembly is urged toward the gate of the dynamic slab gate valve by an energizer to maintain a seal with the gate.
Claims26
A slab gate valve comprising:
- a valve body formed with a through-bore in a first direction and formed with a gate cavity in a second direction, which is orthogonal to the first direction;
- a slab gate having a first portion and a second portion, wherein the slab gate has a first side and a second side;
- wherein the gate cavity is sized and configured to receive the slab gate;
- wherein the first portion of the slab gate is sized and configured to occlude the through-bore when the slab gate is in a closed position;
- wherein the second portion of the slab gate valve is formed with a flow aperture for allowing flow therethrough when the slab gate is in an open position;
- an upper stem coupled to the slab gate for selectively moving the slab gate between the open position and the closed position;
- a lower stem coupled to the slab gate and at least partially disposed within the gate cavity;
- a downstroke lubricant cavity formed in a portion of the valve body proximate to the gate cavity for containing a lubricant for lubricating the lower stem in a downstroke;
- a first seat cavity formed in the valve body proximate a first intersection of the through-bore and the gate cavity on a first side of the first intersection;
- a second seat cavity formed in the valve body proximate a second intersection of the through-bore and the gate cavity on a second side of the second intersection;
- a first dynamic seat assembly comprising a first dynamic seat energizer disposed in the first seat cavity;
- a second dynamic seat assembly comprising a second dynamic seat energizer disposed in the second seat cavity;
- a first dynamic skirt, coupled to a first dynamic skirt energizer, disposed adjacent to the first side of the slab gate and disposed between the first seat cavity and the downstroke lubricant cavity, wherein the first dynamic skirt contacts the slab gate and the first dynamic skirt energizer contacts the valve body;
- a second dynamic skirt, coupled to a second dynamic skirt energizer, disposed adjacent to the second side of the slab gate and disposed between the second seat cavity and the downstroke lubricant cavity, wherein the second dynamic skirt contacts the slab gate and the second dynamic skirt energizer contacts the valve body;
- and
- wherein the first dynamic seat energizer, second dynamic seat energizer, first dynamic skirt energizer, and second dynamic skirt energizer are different energizers.
13 more elements
A slab gate valve comprising:
- a valve body formed with a through-bore in a first direction and formed with a gate cavity in a second direction orthogonal to the first direction;
- a slab gate having a first portion and a second portion, wherein the slab gate has a first side and a second side;
- wherein the gate cavity is sized and configured to receive the slab gate;
- wherein the first portion of the slab gate is sized and configured to occlude the through-bore when the slab gate is in a closed position;
- wherein the second portion of the slab gate valve is formed with a flow aperture for allowing flow therethrough when the slab gate is in an open position;
- an upper stem coupled to the slab gate for selectively moving the slab gate between the open position and the closed position;
- a lower stem coupled to the slab gate and at least partially disposed within the gate cavity;
- a downstroke lubricant cavity formed in a portion of the valve body proximate to the gate cavity for containing a lubricant for lubricating the lower stem in a downstroke;
- at least one seat cavity formed in the valve body proximate an intersection of the through-bore and the gate cavity;
- at least one dynamic seat assembly disposed in the at least one seat cavity;
- wherein the at least one dynamic seat assembly comprises a dynamic seat energizer;
- at least one dynamic skirt, coupled to a dynamic skirt energizer, disposed adjacent to the slab gate and disposed between the at least one seat cavity and the downstroke lubricant cavity, wherein the at least one dynamic skirt contacts the slab gate and the dynamic skirt energizer contacts the valve body;
- and
- wherein the dynamic seat energizer is not the same energizer as the dynamic skirt energizer.
11 more elements
A slab gate valve comprising:
- a valve body formed with a through-bore in a first direction and formed with a gate cavity in a second direction orthogonal to the first direction;
- a slab gate having a first portion and a second portion, wherein the slab gate has a first side and a second side;
- wherein the gate cavity is sized and configured to receive the slab gate;
- wherein the first portion of the slab gate is sized and configured to occlude the through-bore when the slab gate is in a closed position;
- wherein the second portion of the slab gate is formed with a flow aperture for allowing flow therethrough when the slab gate is in an open position;
- an upper stem coupled to the slab gate for selectively moving the slab gate between the open position and the closed position;
- a lower stem coupled to the slab gate and at least partially disposed within the gate cavity;
- a downstroke lubricant cavity formed in a portion of the valve body proximate to the gate cavity for containing a lubricant for lubricating the lower stem in a downstroke;
- at least one dynamic skirt assembly disposed adjacent to the slab gate and between the slab gate and the downstroke lubricant cavity, wherein a first side of the at least one dynamic skirt assembly contacts the slab gate and a second side of the at least one dynamic skirt assembly contacts the valve body;
- at least one dynamic seat assembly disposed within a seat cavity formed in the valve body proximate an intersection of the through-bore and the gate cavity;
- wherein the at least one dynamic skirt assembly comprises a skirt plate proximate to the slab gate;
- wherein the at least one dynamic seat assembly comprises a cylindrical seat proximate to the slab gate;
- and
- wherein the skirt plate and the cylindrical seat are independently urged toward the gate by a plurality of energizers, wherein the plurality of energizers comprises a first energizer disposed between the skirt plate and the valve body and a second energizer disposed between the cylindrical seat and the valve body.
11 more elements
Dependencies are inferred from the claim text.