Well-Control Valves

M&M Oil Tools Well-Control Valves—including DSSV, FOSV, and IBOP valves—deliver dependable flow control during drilling and workover operations. Built for H₂S service and engineered with our patent-pending PWC CARTRIDGE™ technology, these valves offer enhanced reliability, faster field servicing, and proven performance under high-pressure well conditions.

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Exploded illustration of a green well-control valve showing internal components including springs, seals, ball valve assembly, and housing.
Blue Wave Platinum Badge API Q1 Certified M&M Oil Tools: Made in the USA M&M Oil Tools: API & ISO Aligned M&M Oil Tools: HPHT Rated M&M Oil Tools: Global Delivery Blue Wave Platinum Badge API Q1 Certified M&M Oil Tools: Made in the USA M&M Oil Tools: API & ISO Aligned M&M Oil Tools: HPHT Rated M&M Oil Tools: Global Delivery

Features & Benefits

Designed for rapid response and reliable well control, our safety valves provide bi-directional sealing, reduced operating torque, and easy field servicing with a pretested, drop-in cartridge. Available in one- or two-piece construction, they support quick stabbing, top-drive installation, and a wide range of thread connections for versatile deployment.
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Rapid, Reliable Well Control

DSSV, FOSV & IBOP valves control flow through wellbore tubulars and can be quickly stabbed in during kick situations.

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Patent-Pending PWC CARTRIDGE™ Technology

Drop-in cartridge improves reliability, speeds up field service, and eliminates special tools while enhancing sealing integrity.

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Bi-Directional Pressure Holding

The valve seals from above or below, preventing backflow and ensuring consistent well control during critical operations.

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Reduced Operating Torque

Unique cartridge equalizes pressure across the ball, lowering torque requirements and preventing ball distortion.

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Soft + Hard Seat Sealing

Dual-seal design improves performance under both low- and high-pressure conditions and protects against erosion.

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One- or Two-Piece Construction

Compact one-piece design is ideal where space or weight is limited; two-piece design maximizes internal flow area.

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Versatile Thread Options

Available with multiple thread types—including left-hand connections—while maintaining drill string tensile strength.

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H₂S Trim & NACE-Compliant Materials

All valves are built with NACE MR0175/ISO 15156-qualified materials for sour service and demanding environments.

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Full Traceability & Certification

Each valve includes mill certificates, test documentation, and a Certificate of Conformance under M&M’s API Q1 system.

Exploded illustration of a green well-control valve showing internal components including springs, seals, ball valve assembly, and housing.

What Our Customers Say
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John Smith
Director of Marketing
★★★★★
Cupping chicharrones hexagon vaporware. Helvetica beard taiyaki, DIY drinking vinegar PBR&B tonx vape godard tofu. Meggings echo park taxidermy big mood asymmetrical next level.
John Smith
Director of Marketing
★★★★★
Cupping chicharrones hexagon vaporware. Helvetica beard taiyaki, DIY drinking vinegar PBR&B tonx vape godard tofu. Meggings echo park taxidermy big mood asymmetrical next level.
John Smith
Director of Marketing
★★★★★

Need reliable Well-Control Valves for your Operation?

Contact our team for specifications, thread options, or technical recommendations. We’ll help you select the right DSSV, FOSV, or IBOP configuration for your drilling or workover program.

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