Kelly Valves
Kelly valves are also known by various names such as drill string safety valves (DSSVs), kelly cocks, or drill pipe safety valves. Regardless of the name used, these valves remain indispensable components, providing critical well control measures, and exemplifying reliability and safety in drilling operations across the oil and gas industry. Kelly Valves are designed for high-pressure conditions and can hold pressure from both directions, providing a positive seal in the event of a kick. Full-bore openings also allow the unrestricted flow of drilling fluid, reducing wear on critical parts while providing unimpeded access for downhole tools.
Kelly Valve (Drill String Safety Valve) 1 Piece
One solid body ensures there is no need to unscrew to remove internals, and allows for a more compact design.
Kelly Valve (Drill String Safety Valve) 2 Piece
- No constraints when factoring in overall length
- No outside diameter limitations, which is sometimes a design hindrance with the 1 Piece design
- Larger inside diameter are possible
- Our engineered service connection prevents threads unscrewing, unlike other types in the industry
Top Drive Valves
Top drive valves, essential in drilling systems, manage the flow of hydraulic fluid within top drive units. These valves, often integrated into the top drive system, facilitate the precise control of pressure and movement during drilling operations. Ensuring the efficient functioning of the top drive, they regulate the hydraulic power necessary for hoisting, rotating, and circulating functions. Their robust design and meticulous engineering enable seamless operation, contributing to the overall productivity and safety of drilling processes. DMI offers the most common top drive valve replacements for NOV, Can Rig, and Tesco Top Drives.
NOV TDS-11 Replacement
Can Rig Replacement
Tesco 250 Replacement
Safety Valves (Full Opening Safety Valves)
Known as “Full Opening Safety Valves (FOSV),” our safety valves uphold a smooth inside diameter for optimal flow when the ball valve is open. Upon request, we provide valves matching the inner diameter of the drill pipe. Keeping these valves open on the rig floor is crucial for swift insertion into the drill string during well control emergencies. Engineered for insertion into the drill pipe or tubing, these valves stand as pivotal safety measures, greatly augmenting rig safety in drilling operations.
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