Wellhead

Wellhead Control Panel 1

General Introduction Wellhead control panel is key equipment in oil & gas industry to protect oilfield facilities and environment from occurring wellhead fire and emergency incidents, which is one of main control systems to ensure oilfield oil production and transportation to be safely operation according to international standards and national regulation. Wellhead control panel is composed of hydraulic power unit, tubing & fitting and instrument valve and electrical control devices. HPU supply hydraulic resource to open and close SSVs including MSSV, WSSV and SCSSV.

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Main Function 

Local On/Off SSV

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Remote control SSV through RTU

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High-Low pressure sense shut-down automatically.

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Fusible Plug, Anti-fire Shut-down automatically.

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SSV can not be opened unless local reset after shutoff

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Function of showing system pressure

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Relief Valve shall be installed on each hydraulic circuit to prevent high pressure

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Function of showing hydraulic level and level switch for alarm

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Function of defending pressure impact of system

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Function of defending exorbitant pressure

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Function of system pressure monitoring(by pressure transmitter of control panel)

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Function of remote emergency shut-down (by magnetic valve of control panel)

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Function of On/Off SSV monitoring (by pressure switch of control loop of control panel)

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Function of shield High-low pressure sense

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Technical Specification 

Type:

Single well control panel / Multi-well control panel

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Driven:

Pneumatic / Hydraulic / Electric / Solar power / manual

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Output:

0-20000 PSI

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Operation media:

hydraulic oil / instrument air

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Control pressure:

50-100PSI

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Cabinet Temp.:

-35 – 65oC

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Material:

316SS

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IP:

IP54

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Classification:

Class 1 division I / II

Single wellhead Control Panel Single wellhead control panel is used for controlling one well Surface controlled sub-surface safety valve (SCSSV), Master SSV and Wing SSV. SSVs can be shutdown automatically and manually by WHCP to response all kind of emergency situation. Single well control panel is categorized the following system according to driven resource: 

Manual control system

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Electrical control system

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Pneumatic control system

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Solar powered control system

WHCP is composed of hydraulic oil reservoir, hydraulic pump, tubing & fitting, interface control valve, instrument indication devices and control valve. Fitting and tubing of WHCP is manufactured by famous manufacturer such as Parker and Swegelok, hydraulic pump is imported from Haskel . WHCP main function include Hi/Lo pressure Shutdown, fire fusible plug protection and remote ESD 4.1

Manual Control System

Specification Type Service Output pressure Pilot pressure Materials Cabinet Temp.

Manual control system Standard or H2S-CO2(NACE) 5,000-to 15,000-PSIG；2,000-to 4,000-PSIG 50 to 100-PSIG 316SS -30° to 55℃

Feature and Function Manual hydraulic pump supply hydraulic control and output pressure for SSV. Main function includes Remote ESD, Fusible plugs, low pressure / high pressure sensing, Manual shutdown at panel. 4.2

Electrical Control System

Specification Type Service Output pressure Pilot pressure Materials Cabinet Temp.

Electrical control system Standard or H2S-CO2(NACE) 5,000-to 15,000-PSIG；2,000-to 4,000-PSIG 50 to 100-PSIG 316SS -30° to 55℃

Feature and Function Electrical motor driven hydraulic pump with manual pump as standby will supply hydraulic to control SSV. Main function includes Remote ESD, Fusible plugs, low pressure / high pressure sensing, Manual shutdown at panel. 4.3

Pneumatic Control System

Specification Type Service Output pressure Pilot pressure Materials Cabinet Temp.

Pneumatic control system Standard or H2S-CO2(NACE) 5,000-to 15,000-PSIG；2,000-to 4,000-PSIG 50 to 100-PSIG 316SS -30° to 55℃

Feature and function Pneumatic driven hydraulic pump with manual pump as standby will supply hydraulic to control SSV. Main function includes Remote ESD, Fusible plugs, low pressure / high pressure sensing, Manual shutdown at panel.

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Solar Powered Control System Solar powered control system is designed to be used for wellhead control located remote area and desert area.

Feature and Function 

Energy conservation

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Reduce operation expense

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Duel power supply

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Standard control feature

Main function includes RTU shutdown；Fusible plugs；Low pressure/high pressure；Local Manual control 5

Multi-well Control Panel

Each control module is drawable and can be inter-replaceable without any interruption of other well operation. Common module include oil reservoir, Pneumatic hydraulic pump and standby manual pump. Main function shows as following:    

Remote RTU shutdown; Fire fusible plugs protection Low pressure / high pressure sensing Manual control at panel

Specification Type Service

Pneumatic multi-well control panel Standard or H2S-CO2(NACE)

Output pressure

5,000-to 15,000-PSI

Control pressure

50-to 100-PSIG

Wells Materials Cabinet Temp.

2-30 wells 316SS -30° to 55℃

The following chart shows main components: