Method and apparatus for a choke valve and operation of a choke valve

1. A choke valve comprising:

a body having an axial through hole and a radial entry port;

a valve seat coaxially housed in the body axial through hole on a first side of the radial entry port;

a pressure balanced valving member axially reciprocal within the body axial through hole between a first sealing position bearing against the valve seat and a second position spaced away from the seat;

a plug drive housing operably connected to the valving member; and

a detachably connected reinforcement member

detachably connected to the plug drive housing and

increasing an axial load that the plug drive housing can take

before failure of the plug drive housing,

wherein

the reinforcement member is a reinforcement plate,

the plug drive housing has a height, and

the plate is detachably connected to the plug drive housing

via a plurality of spaced apart detachably connectable fasteners,

wherein

the plug drive housing includes

a bonnet connected to the plug drive housing, and

the bonnet includes

a ring which is connected to the bonnet, and

the ring is located between

the reinforcement plate and

the plug drive housing, and

wherein the plate includes

first and second annular and concentric shoulders

with the first shoulder

having a larger radius of curvature compared to the second shoulder, and

the ring rests in and remains in contact with the first shoulder, and

the bonnet

rests in but is spaced apart from a second shoulder of the ring

to form a gap between

an upper surface of the bonnet and

an inner surface of the second shoulder,

wherein before failure,

the bonnet will transfer a load to the reinforcement plate

causing the reinforcement plate to transfer this load to the plug drive housing

through the plurality of detachably connectable fasteners.

2. The choke valve of claim 1 , wherein movement of the bonnet causes the bonnet to contact the second shoulder.

3. The choke valve of claim 1 , wherein the plug drive housing includes an actuator which is manually, electrically, hydraulically or pneumatically operated.

4. The choke valve of claim 1 , wherein the valving member has at least one fluid channel traversing the valving member.

5. A choke valve comprising:

a body having

an axial through hole passing from a first side of the body to a second side of the body,

an outlet passageway

coaxially aligned with the through hole and positioned at the first side of the body, and

a radial inlet port

intersecting the through hole between the first and second sides of the body;

a valve seat

coaxially housed in the through hole between the inlet port and the outlet passageway;

a pressure balanced valving member

axially reciprocable within the through hole between

a first position bearing against the valve seat and

a second open position spaced away from the valve seat;

a plug drive having a housing,

the housing being attached to the second side of the body,

the housing having an axially reciprocating plug drive shank

for reciprocal moving the valving member

between the first position and the second position;

a plug drive reinforcing member

detachably connected to the housing,

the reinforcing member comprising

a plate section with an opening

allowing the housing to partially extend therethrough; and

a first end of a stem

positioned in a socket in one end of the plug drive shank;

whereby

whenever the plug drive shank is subjected to a fluid pressure

in excess of a predetermined value from the outlet passageway

the plug drive reinforcing member

will reinforce the housing of the plug drive,

wherein the reinforcement member

is a reinforcement plate,

the housing has a height, and

the plate is detachably connected to the housing

via a plurality of spaced apart detachably connectable fasteners,

wherein the housing includes

a bonnet connected to the housing, and

the bonnet includes

a ring which is connected to the bonnet, and

the ring is located between the reinforcement plate and the housing, and

wherein the plate includes

first and second annular and concentric shoulders

with the first shoulder

having a larger radius of curvature compared to the second shoulder, and

the ring

rests in and remains in contact with the first shoulder, and

the bonnet

rests in but is spaced apart from a second shoulder of the ring

to form a gap between

an upper surface of the bonnet and

an inner surface of the second shoulder,

wherein before failure,

the upper surface of the bonnet

will transfer a load to the reinforcement plate

which transfers this load to the housing

via the plurality of spaced apart detachably connectable fasteners.

6. The choke valve of claim 5 , wherein movement of the bonnet causes the bonnet to contact the second shoulder.

7. The choke valve of claim 5 , wherein the housing includes an actuator which is manually, electrically, hydraulically or pneumatically operated.

8. The choke valve of claim 5 , wherein the valving member has at least one fluid channel traversing the valving member.