w. www.hunting-intl.com | e. [email protected]Wireline Equipment Catalogue v.3.2 | Pressure Control Equipment Pressure Control Equipment Wireline Pressure Control Equipment Grease Injection Control Heads WIRELINE OPERATIONS: PRESSURE CONTROL EQUIPMENT Positioned on top of the lubricator rig up, the Grease Injection Control Head is designed to contain well pressure whilst running braided cable into or out of the well. Available in a number of basic configurations, the current Hunting family of designs is the culmination of years of experience. Each configuration offers operators a light weight and effective means of containing pressure. All Grease Injection Control Heads consist of a number of flow tubes – the actual number depends upon the well pressure and a number of other factors. The bore of these flow tubes is carefully sized to suit the cable being used. Ideally it would be only .006 - .008 bigger than the cable. The tubes are held together by an outer sleeve and couplings. The lowermost coupling has a grease injection port. At the top of the flow tubes is a hydraulic pack off and a grease drain. Available in a number of basic configurations, the current Hunting family of designs is the culmination of years of experience. A seal is affected by pumping grease at slightly above well pressure, into the port in the lowermost coupling. From there, it flows into the annulus between the flow tube and the cable. This action causes a pressure drop to occur across each tube prior to the grease exiting through the return port at the top. The bottom flow tube can be fitted with a quick union adapter, or threaded directly into a specially deigned tool catcher. For safety, a velocity ball check valve is normally located below the flow tubes. The check valve mechanism is housed in either the quick union or the tool catcher body. In the event of the cable breaking and exiting the flow tubes, this valve will close and contain well fluids. Similarly, grease injection ports are fitted with check valves to prevent well fluids escaping. The pack off at the top is closed fully in order to gain control of the pressure before running the cable. Once the control is gained, the grease controls the pressure and it can be relaxed to allow free movement of the cable. A line wiper is often included integrally with the pack off assembly, or added as a separate component. Dual pack offs are common in 15K applications and becoming more so for 10K applications. The key to maintaining a good seal is keeping a good volume of grease flowing into the system at the correct pressure. One injection port is usually enough for this, but two ports are often used, particularly in high pressure applications. (Additional images overleaf)
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Wireline Equipment Catalogue v.3.2 | Pressure Control Equipment
Pressure ControlEquipment
Wireline Pressure C
ontrol Equipment
Grease Injection Control Heads
WIRELINE OPERATIONS: PRESSURE CONTROL EQUIPMENT
Positioned on top of the lubricator rig up, the Grease Injection Control Head is designed to contain well pressure whilst running braided cable into or out of the well. Available in a number of basic configurations, the current Hunting family of designs is the culmination of years of experience. Each configuration offers operators a light weight and effective means of containing pressure.
All Grease Injection Control Heads consist of a number of flow tubes – the actual number depends upon the well pressure and a number of other factors. The bore of these flow tubes is carefully sized to suit the cable being used. Ideally it would be only .006 - .008 bigger than the cable. The tubes are held together by an outer sleeve and couplings. The lowermost coupling has a grease injection port. At the top of the flow tubes is a hydraulic pack off and a grease drain.
Available in a number of basic configurations, the current Hunting family of designs is the culmination of years of experience.
A seal is affected by pumping grease at slightly above well pressure, into the port in the lowermost coupling. From there, it flows into the annulus between the flow tube and the cable. This action causes a pressure drop to occur across each tube prior to the grease exiting through the return port at the top.
The bottom flow tube can be fitted with a quick union adapter, or threaded directly into a specially deigned tool catcher. For safety, a velocity ball check valve is normally located below the flow tubes. The check valve mechanism is housed in either the quick union or the tool catcher body. In the event of the cable breaking and exiting the flow tubes, this valve will close and contain well fluids. Similarly, grease injection ports are fitted with check valves to prevent well fluids escaping.
The pack off at the top is closed fully in order to gain control of the pressure before running the cable. Once the control is gained, the grease controls the pressure and it can be relaxed to allow free movement of the cable. A line wiper is often included integrally with the pack off assembly, or added as a separate component. Dual pack offs are common in 15K applications and becoming more so for 10K applications.
The key to maintaining a good seal is keeping a good volume of grease flowing into the system at the correct pressure. One injection port is usually enough for this, but two ports are often used, particularly in high pressure applications.
Wireline Equipment Catalogue v.3.2 | Pressure Control Equipment
Pressure ControlEquipment
Wireline Pressure C
ontrol Equipment
WIRELINE OPERATIONS: PRESSURE CONTROL EQUIPMENT
The Hunting Cleanline Grease Injection Control Head incorporates an integral line wiper in the pack off housing at the top of the flow tubes. Because of its unique configuration, it eliminates the need for a separate drain hose from the line wiper. All waste grease is returned to the waste tank in a single hose.
This arrangement offers the best combination of effectiveness, convenience and above all, cleanliness.
(See charts overleaf)
Cleanline Grease Injection Control Heads
All waste grease is returned to the waste tank in a single hose.
‘O’ ring redress kits are available for all Grease Injection Control Heads.Part numbers follow the assembly num-ber with an R trailing the last three digits.
Each part number carries a suffix for the exact flow tube size, shown as XXX in the chart.Flow tubes are available in .002 increments and have a tolerance of .002
Example: for a cable of .218 diameter, .226-.228 flow tubes might be selected
The Grease Injection control head might be 544-0575-200-6-226