Well-Pressure-Control-Unit

The GeoSys Well-Pressure-Control-Unit is employed in the oil and gas exploration industry in order to operate boreholes that are under high pressure. Through this control unit, the insertion of logging tools, without the leakage of harmful gases, is facilitated.

The Well-Pressure-Control-Unit is a large pipe construction which can be installed vertically onto the borehole, which is under high pressure. The upper part of the construction consists of the Cable Wiper and the Grease Head Injector. The logging tool is put into the Lightweight Lubricator, which is located below the Grease Head Injector. In order to lower the logging tool into the well, all valves between the Lubricator and the borehole are opened. Consequently, the pressure in the Lubricator equals the borehole pressure. Thus, the logging tool can be lowered into the borehole. During this whole operation the Cabel Wiper and the Grease Head Injector avoid a leakage of gas through the cable port.

In order to retrieve the logging tool from the borehole, the tool is being pulled up into the Lightweight Lubricator. Following, all valves below the Lubricator are being closed. The excess pressure in the Lubricator is being discharged, which is necessary to retrieve the logging tool from the Lubricator.

Construction (From bottom to top)

BOP – Blow out preventer
This device ensures that no harmful gases are discharging into the environment.
Tool Trap
The Tool Trap is a safety device which protects the logging tool from falling into the borehole.
Quick Test Assembly
This device enables a quick and easy validation of pressure seals.
Lightweight Lubricator
The Lubricator facilitates the collection of the logging tool and can be extended or shortened through the utilisation of pipes.
Head Catcher
The Head Catcher is another safety device in order to protect the logging tool from falling into the borehole.
Grease Head Injector
This device enables a complete sealing around the cable.
Cable Wiper
The Cable Wiper facilitates in conjunction with the Grease Head Injector the sealing around the cable.

Technical Specification of the Well-Pressure-Control-Unit

Cable Wiper
Connection Acme Quick Union Type B, O
Whitworth
Cable Sizes Up to 15/32″ 11,91mm
Weight 21,43 kg
Grease Head Injector
Cable Sizes All common sizes are sup-ported up to 15/ 32″ 11,91mm
Working Pressure Up to 10.000 PSI/ 700 bar
Service Environment Standard and Sour
Connection Acme Quick Union Type B, O
Whitworth
Release Head Catcher
Collet Size
Inch 1,00″, 1,187″, 1,375″, 1,750″, 2,313″
Millimeter 25,4; 30,15; 34,92; 44,45; 58,75
Working Pressure Up to 10.000 PSI/ 700bar
Service Environment Standard and Sour
Connection Acme Quick Union Type B, O
Whitworth
Weight 49,48kg
Lightweight Lubricator
Connection Acme Quick Union Type B, O
Whitworth
Service Environment Standard and Sour
Incorporate design Dual seal
Weight 42 kg
Quick Test Assembly
Connection Acme Quick Union Type B, O
Whitworth
Service Environment Standard and Sour
Working Pressure Up to 10.000 PSI/ 700bar
Size Available from 2,5″/ 63,5mm to 7″/ 177,8mm
Side Port Connection Customer specified
Tool Trap
Connection Acme Quick Union Type B, O
Whitworth
Control Manual or Hydraulic
Inner Dimensions Produced compatible to Lubri-cator
Working Pressure Up to 10.000 PSI/ 700bar
Service Environment Standard and Sour
Blowout Preventer
Connection Acme Quick Union Type B, O
Whitworth
Size From 3,0625″/ 77,79mm to 7,0625″/ 179,39mm
Hydraulic Operation Pressure 3000 PSI/ 306,8 bar
Safety Manual Override
Service Environment Standard and Sour