Worldwide Oilfield Machine (WOM) has developed a 6-3/8” – 15K Surface tree (Flowhead). The surface Flowhead assembly is an integral part of the Intervention riser string assembly. This unit allows the access to the well bore thru the riser with a variety of wireline and coil tubing tools. The Flowhead is designed to accommodate coil tubing lift frames and is suspended via 10-3/4” standard casing elevators.
Features
- Compact valve block design for reduced weight and package height.
- Includes two 6-3/8-15K field proven valve.
- Includes two 4-1/16-15K field proven valves.
- Includes a 6-3/8” 10k dynamic swivel assembly per NACE MR-01-75.
- Mechanical Over-ride for valve actuators.
Industry Standards
| NAME | DESCRIPTION | REV |
| API 6A / ISO 10423 | Specification for Wellhead and Christmas Tree Equipment (Latest Edition) | 20th Edition October 2010 |
| API 17D /ISO 13628-4 | Specification for Subsea Wellhead & Christmas Tree Equipment (Latest Edition) | 2nd Edition May 2011 |
| API 17G /ISO 13628-7 | Petroleum and natural gas industries- Design and operation of Subsea production systems-part 7: Completion / work over riser system | 2nd Edition July 2006 |
| SAE AS4059 | Aerospace Fluid Power – Cleanliness Classification for Hydraulic Fluid (Latest Edition) | AS4059F September 2013 |
| NACE MR0175 /ISO 15156 | Petroleum and natural gas industries- Materials for use in H2S-containing environments in oil and gas production | 2nd Edition July 2006 |
| DNVGL-OS-E101 | Offshore standards, Drilling facilities | January 2018 |
Operating Specification
| Pressure / Loading Criteria | Specification |
| Maximum working pressure | 15,000 Psi |
| Maximum Test pressure | 22,500 Psi |
| Load Rating @250°F | 1,500,000 lbs @0 psi |
| Load Rating @250°F | 750, 000 lbs @10,000 psi |
| Temperature / Design Criteria | Specification |
| Temperature Rating | P+U |
| Min. Design Temperature | -20° F |
| Max. Design Temperature | 250° F |
| Nominal bore size | Ø6 3/8” |
| Drift Dia | Ø 6.34 +.027/-.000 |
| Material Class | EE-NL |
| PSL Level | PSL-3G |
| PR Level | 2 |
| Well Barrier type | 2 x 6 3/8” Hydraulic gate valve 2 x 4 1/16” Spring-assist fail-safe-closed gate valves |
| Proven Cut Capability: | None (Can be incorporated if required for Slickline / Braided line / Electric line in SWAB valve on new equipment) |
| Operating Criteria | Specification |
| Water depth | 10,000 FT |
| Service Condition | H2S per NACE MR 01-75 |
| API Monogram | No |
| Test cap (Top of FH) | 10.750-2 ACME-2G Pin |
| Test cap (Bottom of FH) | 10.750-2 ACME-2G RH Pin |
Valves and Actuators
| S No. | Valves | Nominal Size | Qty |
| 1 | Swab valve | 6-3/8” | 1 |
| 2 | Lower Master Valve | 6-3/8” | 1 |
| 3 | Fail Safe wing valve | 4-1/8” | 2 |
Swab Valve
| Nominal Size | Ø 6 3/8” |
| Maximum working pressure | 15,000 Psi |
| Maximum Test pressure | 22,500 Psi |
| Control Pressure | 3,000 psi |
| Max. Control Test Pressure | 4,500 psi |
| Actuator Type | Double Acting Hydraulic (Fail As Is) |
| Position Indicator | Yes |
| Over-ride | Yes (Separate Assy supplied with FH assembly) |
Lower Master Valve
| Nominal Size | Ø 6 3/8” |
| Maximum working pressure | 15,000 Psi |
| Maximum Test pressure | 22,500 Psi |
| Control Pressure | 3,000 psi |
| Max. Control Test Pressure | 4,500 psi |
| Actuator Type | Double Acting (Fail As Is) |
| Position Indicator | Yes |
| Over-ride | Yes (Separate Assy supplied with FH assembly) |
Choke / Kill Valve
| Nominal Size | Ø 4 1/16 |
| Maximum working pressure | 15,000 Psi |
| Maximum Test pressure | 22,500 Psi |
| Control Pressure | 3,000 psi |
| Max. Control Test Pressure | 4,500 psi |
| Actuator Type | Fail Safe Close |
| Position Indicator | Yes |
Interfaces
| Flow Line | 3-1/16”-10K Flange (No X-Overs included) |
| Kill Line | 3-1/16”-10K Flange (No X-Overs included) |
| Top | 10-3/4’’ – 2 ACME-2G BOX (Handling Sub) supplied with 7-1/16-10K API Test flange |
| Bottom | 10-3/4’’ – 2 ACME-2G BOX (Saver Sub) |
| Sensor Interface | No |
Cross-Overs
| Position | Top connection | Bottom Connection |
| Connection between Saver-sub and Riser | 10-3/4”-2 ACME-2G-RH (PIN) | 10-3/4”-2 ACME-2G-RH (PIN) |
Hydraulic Data
| Control Fluid Type | HW443 (or) Water based Glycol |
| Control Fluid Cleanliness | SAE AS4059 CLASS 6B-6F |
