Capillary Tube

Polymer encapsulated armored tubing is applied for precise dosing of chemical reagents and their delivery with minimal losses to the required level of a downhole

Application

Downhole chemical injection

Capillary tube

Inner jacket

Armoring steel wires incorporated into the outer jacket

Polymer tube

Armoring steel wire incorporated into outer the jacket

Outer jacket

Features

Easy sealing
Flexible
High resistance to internal and external pressure
Outer jacket resistance to high temperatures
High resistance to aggressive environments
Corrosion-resistant alloys are suitable for high hydrogen sulfide environments

Design options

Inner polymer or stainless steel tube

Parameters
Temperature rating	+90 °C +125 °C +140 °C	+194 °F +257 °F +284 °F
Tube inner diameter	3.6–7 mm	0.118–0.275 in
Outer jacket diameter	10–17 mm	0.393–0.669 in
Inner operating pressure	from 20 MPa	from 2900 psi
Minimum bending radius	x 20D

Materials

Tube: stainless steel 304, 316L, Incoloy, Inconel

Armor wire: GIPS (galvanized improved plowed steel) or GEIPS (galvanized extra improved plowed steel), stainless steel or specialty Ni-based alloys for higher corrosion resistance

Jacket: PP, PE