Top-Hole Diverter System, 21-1/4" 2,000 psi WP, HMH KFDJ Style — Offshore Shallow Gas

The Top-Hole Diverter System, 21-1/4" 2,000 psi WP, HMH KFDJ Style — Offshore Shallow Gas is a complete diverter system unit rated for 2,000 psi working pressure (2K class) in standard. The 21-1/4" 2K diverter sits at the top of the offshore stack during top-hole / surface-casing drilling — diverts uncontrolled shallow-gas flow overboard rather than letting it reach the rig floor. Mandatory on offshore drilling through gas-charged shallow sands. Tier 2 — offshore-only, lower volume but high per-unit value. Standard service rated for sweet hydrocarbon, completion fluid, water, brine, and gas streams within the working-pressure envelope. For wells with H₂S exposure, specify the sour-service variant.

Construction

• Equipment type: Diverter System
• Vertical bore size: 21-1/4"
• Cold working pressure: 2,000 psi (2K class)
• Service class: Standard
• End connections: API 6A 21-1/4" 2K flanged top × flanged bottom; integral overboard / diverter line on side outlets
• Body material: Forged AISI 4130 alloy steel — quenched and tempered to API 16A working-pressure design; hardness controlled
• Temperature rating: -20°F to 250°F (-29°C to 121°C) — API 16A standard envelope
• Closing time: < 30 s on largest cavity (per API STD 53)
• Approximate weight: 7,800 kg (transport-ready)

OEM compatibility

Engineered as a recognised matched-pressure interchange / supply for the following OEM equipment lines (Indus Hydraulics is not an authorised distributor of these OEMs — units are sourced through Indus and supplied with full traceability):

• HMH KFDJ 21-1/4" 2K
• HMH KFDS-FS 21-1/4" 2K
• Cameron diverter 21-1/4" 2K

OEM cross-reference: HMH KFDJ 21-1/4" 2K, HMH KFDS-FS, Cameron diverter 21-1/4" 2K, Shaffer diverter 21-1/4" 2K — interchangeable on offshore jack-up / platform top-hole stacks.

Applications

• Offshore jack-up top-hole drilling through shallow gas
• Platform drilling on ADNOC offshore (Lower Zakum, Upper Zakum)
• Saudi Aramco offshore (Marjan, Safaniyah, Manifa) top-hole sections
• New-build offshore-rig diverter retrofits

Performance & testing

Hydrostatic shell test at 1.5× rated working pressure on every unit. Function-test on rams, packers, and seal elements per API STD 53. Mill test reports per EN 10204 3.1 / 3.2 supplied. Charpy V-notch impact testing at low temperature available where service requires toughness verification. Closing-time and seal-pressure data sheets included with FAT package.

Compliance

• API 16A (per equipment class)
• EN 10204 3.1 / 3.2 mill test reports
• Hydrostatic test certificates per unit
• Heat-number traceability stamped on body
• FAT (factory acceptance test) report on request

How to order

Confirm on your RFQ: (a) exact bore size, (b) working pressure and pressure class, (c) ram configuration / cavity count (where applicable), (d) end connection family (API 6A studded, flanged, or bolted), (e) service class — sour (NACE MR0175), HPHT, or standard, (f) elastomer compound preference (HNBR / AFLAS for GCC sour service), (g) FAT witness requirement, and (h) destination port for door-to-door logistics. Indus quotes ex-Dubai (AED) with Aramco / ADNOC / KOC vendor-registered logistics support.

Region notes

Stocked / sourced for the GCC: Saudi Arabia (Aramco IKTVA), UAE (ADNOC ICV), Kuwait (KOC), Oman (PDO), Qatar (QatarEnergy), Bahrain (BAPCO), and Iraq south. Sour-service trim is the regional default; Indus carries sour-service variants in stock and treats sweet-service as a build-to-order downgrade.

Companion products

Pair with matched-pressure 2K BOP control unit (Koomey-style accumulator), API 16C choke & kill manifold, BX ring gaskets, B7M studs and 2H nuts (sour service), HNBR / AFLAS elastomer kits, and matching drilling spool / DSA crossover. Annual redress kits and 5-year API 16A recertification service available — see the BOP Services category.