The 3D choke needs WebGL, which this browser has switched off. Everything it shows is written out below: how the choke works and where it fits.
A linear trim. Open to closed in one smooth stroke.
A choke meters flow in managed pressure drilling. In this one, an electric servo turns a ball screw, and the screw strokes a linear trim straight into a round orifice and back out. Scroll to take it apart.
Drawn the way a spec sheet draws it.
The choke in elevation, with three rounded dimensions: the inlet, the trim and its travel. Then the drawing resolves into the choke.
What’s aheadThe choke cut open, taken apart, what each part does, then how it moves.
Half the body removed.
Inside: the linear trim on its stem, the round orifice seat it strokes into, and the ball screw turning on the actuator axis.
Six pieces, servo to body.
Servo, ball screw, ball nut, stem and linear trim, orifice seat, choke body. The numbers are sequence tags, not part numbers.
What each part does, one at a time.
The screw turns spin into a straight stroke.
The servo turns the ball screw, and the screw turns that rotation into the trim’s straight-line travel. The trim strokes into the orifice and back out, so the flow area changes smoothly instead of in steps.
In shortThe servo turns the ball screw, and the screw drives the trim straight into the orifice and back out.
Open it. Close it.
Drag the trim stem, or use the control, and watch the trim leave the orifice.
The 3D choke is a concept, not an engineering model.
A servo, a ball screw, and a trim that strokes into an orifice.
What’s belowSection drawings numbered 1 to 6 like the 3D, then the three ideas behind it.
A choke is a controlled restriction. In managed pressure drilling it holds back pressure on the well by changing how much flow area it leaves open, so it has to move precisely and pass the cuttings that come up with the mud.
- Servo Motor, drive and encoder in one housing
- Ball screw operator As drawn, the servo turns the screw and the nut travels on it
- Ball nut Carries the stem
- Stem and linear trim Moves straight along the actuator axis
- Orifice seat The round opening the trim closes on
- Choke body Inlet underneath, outlet in line with the actuator
- A linear trim. The trim strokes straight along the actuator axis, into and out of the orifice. Because it moves in a line, the flow area it leaves open changes smoothly along the stroke.
- A ball screw, driven by the servo. The servo’s rotation turns the screw, and the nut on the screw turns that rotation into the trim’s straight stroke with little friction, so the servo does not have to work hard to hold a position.
- Built to pass cuttings. The trim and seat leave a generous path, so solids that come up with the mud can pass through instead of packing the choke.
The servo turns the ball screw, the screw pushes the linear trim straight into and out of the orifice, and the opening it leaves is shaped to pass cuttings.
Part of a managed pressure drilling system.
A general description of the job, not a product listing.
Where you find one
- Managed pressure drilling skids
- Single and dual leg manifolds
- Back pressure control loops
- Next to a flow meter and a pressure sensor
What the design aims for
- Smooth, repeatable positioning
- Electric actuation
- A path for cuttings
- A small footprint
- A gantry for safe servicing
A concept built in code, not a product page.
Teardown makes interactive 3D pages that take a machine apart on screen, so a buyer can tap a part and read what it does. This one is a generic MPD choke drawn from common industry arrangements.
- Generic. Part names are plain descriptions. No part is a real catalogue item.
- Illustrative. Dimensions are rounded and the proportions are drawn for explanation. Nothing here is a rating or a specification.
- Yours next. The same treatment works for a real product, with your own drawings and parts list behind it.