Drilling Systems
Literature - Valves
CHECKGUARD

Hydril Pressure Control's retrievable Checkguard drop-in check valves prevent return flow during a kick and are suitable for most drilling situations in which return flow through the drill string is a risk and normal operation requires the benefits of a full-bore sub.
CHOKE VALVES

Today Hydril Pressure Control offers two high-performance choke product lines — "sleeve" design valves for critical service applications and "plug" design valves for moderate to severe applications.
KELLYGUARD™ DRILLSTEM VALVES

Kellyguard™ drill stem valves provide reliable service for standard and top-drive drilling applications in normal and corrosive drilling environments. Pressure ratings of 10,000 and 15,000 psi are available.