Popular Name： Grease Injection Control Head / Sealing Head / Pack-off
The Grease Injection Control Head is designed to create a seal around static or dynamic wireline, allowing intervention access to wells under pressure.
Grease Injection Control Head positioned at the uppermost point of the Wireline PCE. It comprises two major sub-assemblies, the Stuffing Box & Line Wiper and Grease Injection Assembly. The Stuffing Box is designed to pack-off on a stationary wireline by means of a pack-off rubber, the hydraulic Line Wiper will wipe excess grease from a moving wireline. The Grease Injection Assembly is made up of several inner Flow Tubes size to fit tightly around the wireline and Outer Sleeves to support the assembly.
When entering a well under pressure, viscous grease is injected into the Flow Tubes at a pressure greater than the existing well pressure. The grease fills the annular space between the inner wall of the Flow Tube and outside surface of the wireline, forming a liquid seal that contains the well fluids while allowing wireline movement.
The bottom connection can be mated to Cable Cutter Sub, or a Quick Union, or a Ball Check Valve/Tool Catcher combination.
Feature
1) Range of wire sizes applicable.
2) Max. 15000Psi working pressure and H2S service.
3) Dual Stuffing Box and Dual Grease Injection Port for high pressure application.
4) Recommended Flow Tube clearance + 0.003” to 0.008”.
Main Parameter
1) Wire size
2) Working Pressure
3) Lower Connection required
4) Service Environment ( STD or H2S )
5) Working Temperature
Note
1) There are Bowen (Type B), Otis (Type O) and our own Quick Union (Type W) for threaded selective.
2) Additional size available on request.
Normal Guarantee Period
12 months after the clients received the Equipment or 13 months after the commodity is shipped from Chinese Harbor.
Information Required When Inquiry
If you will purchase the whole Wireline PCE, please refer to the Information Required When Inquiry in Chapter《Wireline PCE》.
If you purchase the Grease Injection Control Head separately, the Main Parameter information above mentioned will be asked.