The THORNHILL CRAVER^® UNIBOLT Choke design is field proven in a wide range of applications. Available with alloy steel or 12% chrome stainless steel body, it is provided with a ring-groove or taper-type seal depending on size and pressure. Adjustable choke styles are Standard, Long Nose Heater, Force Balanced and Steam. Engineered for heavy duty, maintenance- free performance, The Thornhill Craver UNIBOLT Choke is commonly selected for a number of applications, including:

The UNIBOLT coupling between the body and yoke is a unique design feature that ensures superior reliability and safety over other methods. The connection is made by means of the UNIBOLT inter-locking shelf design rather than by conventional threads or flanges.

















THORNHILL CRAVER Unibolt Positive Chokes

A long-time standard for safety and reliability in the oilfield,
THORNHILL CRAVER^® UNIBOLT Positive Chokes are designed
for maximum performance under critical conditions.

Thornhill Craver UNIBOLT Positive Chokes are available for pressures up to 20,000 psi with either alloy steel or 12% chrome stainless steel body. They are provided with a ring-groove or taper type seal depending on size and pressure. Bean sizes can be specified from 1/64" to 2". Engineered for heavy duty, maintenance- free performance, the Thornhill Craver UNIBOLT Choke is commonly selected for a number of applications, including:

• Wellheads
• Well testing
• Manifolds
• Process facilities

The UNIBOLT coupling between the blanking plug and the body is a unique design feature that ensures superior reliability and safety over other methods. The connection is made by means of the UNIBOLT interlocking shelf design rather than by conventional threads or flanges.

• Production manifolds
• Wellheads
• Heaters
• Critical Services
• Well testing
• Well clean-up