Oil Production in Oilfields
Oil Production in Oilfields
How does
control lines works in wells?
Control lines
enable the transmission of signals, allow downhole data acquisition, and permit
control and activation of downhole instruments.
The command
and control signals can be sent from a location on the surface to the downhole
tool in the wellbore. Data from downhole sensors can be sent to the surface
systems for evaluation or use in certain well operations.
Downhole
safety valves (DHSVs) are surface controlled sub-surface safety valves (SCSSV)
hydraulically operated from a control panel on the surface. When hydraulic
pressure is applied down a control line, the pressure forces a sleeve within
the valve to slide down, opening the valve. On releasing the hydraulic
pressure, the valve closes.
Meilong Tube's
downhole hydraulic lines are used primarily as communication conduits for
hydraulically operated downhole devices in oil, gas, and water-injection wells,
where durability and resistance to extreme conditions are required. These lines
can be custom configured for a variety of applications and downhole components.
All
encapsulated materials are hydrolytically stable and are compatible with all
typical well completion fluids, including high-pressure gas. The material
selection is based on various criteria, including bottomhole temperature,
hardness, tensile and tear strength, water absorption and gas permeability,
oxidation, and abrasion and chemical resistance.
Control lines
have undergone extensive development, including crush testing and high-pressure
autoclave well simulation. Laboratory crush tests have demonstrated the
increased loading under which encapsulated tubing can maintain functional
integrity, particularly where wire-strand “bumper wires” are used.
Where are
control lines used?
-
Intelligent
wells requiring the functionality and reservoir management benefits of remote
flow-control devices because of the costs or risks of interventions or an
inability to support the surface infrastructure required in a remote location
-
Land,
platform, or subsea environments
