SUPERCHOKE High-Pressure Drilling Choke Control System | Schlumberger

How it improves wells

The SUPERCHOKE high-pressure drilling choke control system handles 5,000 to 15,000 psi [345 to 1,034 bar] and is precision engineered for precise well control. Controls can be operated from either remote or onsite consoles.

Heavy-duty, diamond-lapped tungsten-carbide plates are honed to a flatness measured by light bands and feature unique, half-moon-shaped orifices. Rotation of the actuator fork allows finite regulation of the size of the opening from full open to full close.

A 17° dead band overlap beyond the full-close position ensures closure even if the plates become worn following extended exposure to abrasives laden fluid flow. Pressure drops or surges don’t affect the quality of the seal in the plate-to-plate design; the seal improves under pressure.

Tungsten-carbide wear sleeves increase service life and absorb the effects of abrasive downstream turbulence, especially during underbalanced drilling operations.