WOM Subsea is specialized in providing custom-engineered subea solutions to WOM clients around the globe
WOM Subsea has recently expanded its operations to a 10,000 sq ft highbay which allows for up to 3 Subsea Intervention Systems to be worked on Simultaneously
WOM Subsea's operations are closely integrated with the established infrastructure which WOM has built over yhe past 40 years
previous arrow
next arrow
Slider

7 3/8-10K Surface Tree (Flow head)

Worldwide Oilfield Machine (WOM) has developed a 7-3/8” – 10K 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 7-3/8-10K field proven valve.
  • Includes two 5-1/8-10K field proven valves.
  • Includes a 7-3/8” 10k dynamic swivel assembly per NACE MR-01-75.
  • Mechanical Over-ride for valve actuators.

Industry Standards

NAME DESCRIPTION REV
API 6A /ISO 10423Specification for Wellhead and Christmas Tree Equipment (Latest Edition)20th Edition October 2010
API 17D /ISO 13628-4Specification for Subsea Wellhead & Christmas Tree Equipment (Latest Edition)2nd Edition May 2011
API 17G /ISO 13628-7Petroleum and natural gas industries- Design and operation of Subsea production systems-part 7: Completion / work over riser system2nd Edition July 2006
SAE AS4059Aerospace 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 production2nd Edition July 2006
DNVGL-OS-E101Offshore standards, Drilling facilitiesJanuary 2018

Operating Specification

Pressure / Loading Criteria Specification
Maximum working pressure 10,000 Psi
Maximum Test pressure 15,000 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  Ø7 3/8”
Drift Dia Ø 7.345 +.027/-.000
Material ClassEE-NL
PSL LevelPSL-3G
PR Level2
Well Barrier type2 x 7 3/8” Hydraulic gate valve 2 x 5 1/8” 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) 7 1/16”-10K API Flange
Test cap (Bottom of FH)10-1/8-4 ACME Pin

Valves and Actuators

S No.ValvesNominal SizeQty
1 Swab valve 7-3/8” 1
2 Lower Master Valve 7-3/8” 1
3 Fail Safe wing valve 5-1/8” 2

Swab Valve

Size 7-3/8”
Maximum working pressure 10,000 Psi
Maximum Test pressure 15,000 Psi                
Control Pressure 3,000 psi
Max. Control Test Pressure 4,500 psi
Actuator Type Double Acting Hydraulic (Fail As Is)
Fluid Volume Open: 1.25 US gal                                                            Close: 1.29 US gal
Position Indicator Yes
Over-ride Yes (Separate Assy supplied with FH assembly)

Lower Master Valve

Size 7-3/8”
Maximum working pressure 10,000 Psi
Maximum Test pressure 15,000 Psi                
Control Pressure 3,000 psi
Max. Control Test Pressure 4,500 psi
Actuator Type Double Acting (Fail As Is)
Fluid Volume Open: 1.25 US gal                                                            Close: 1.34 US gal
Position Indicator Yes
Over-ride Yes (Separate Assy supplied with FH assembly)

Choke / Kill Valve

Size 5-1/8”
Maximum working pressure 10,000 Psi
Maximum Test pressure 15,000 Psi                
Control Pressure 3,000 psi
Max. Control Test Pressure 4,500 psi
Actuator Type Fail Safe Close
Fluid Volume Open: 0.63 US gal                                                       
Position Indicator Yes

Interfaces

Flow Line 4-1/16”-10K Flange (Customer Specific)
Kill Line 4-1/16”-10K Flange (Customer Specific)
Top 10-1/8’’ – 4 ACME-2G BOX (Handling Sub) supplied with 7-1/16-10K API Test flange
Bottom 10-1/8’’ – 4 ACME-2G BOX (Saver Sub)
Chemical Injection 3/8” Autoclave HP port (QTY:2) at below SWAB valve
Sensor Interface No

Cross-Overs

Position Top connection Bottom Connection
Connection between Saver-sub and Riser 10-1/8”-4  ACME-2G-RH (PIN) Customer Specific Riser thread connection

Hydraulic Data

Control Fluid Type HW443 (or) Water based Glycol
Control Fluid Cleanliness SAE AS4059 CLASS 6B-6F

Enquire about 7 3/8-10K Surface Tree (Flow head):

  • This field is for validation purposes and should be left unchanged.
Scroll to Top