Oil and gas production handbook - Process Control and ...
Oil and gas production handbook - Process Control and ...
Oil and gas production handbook - Process Control and ...
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• Screw compressors are<br />
manufactured up to<br />
several MW, synchronous<br />
speed (3000/3600 rpm)<br />
<strong>and</strong> pressure up to about<br />
2.5 MPa (25 bar). Two<br />
counter rotating screws<br />
with matching profiles<br />
provide positive<br />
displacement <strong>and</strong> a wide<br />
operating range. Typical<br />
use is natural <strong>gas</strong><br />
gathering.<br />
Photo: Mycom/Mayekawa mfg.<br />
• Axial blade <strong>and</strong> fin type<br />
compressors with up to 15<br />
wheels provide high<br />
volumes at relatively low<br />
pressure differential<br />
(discharge pressure 3-5<br />
times inlet pressure),<br />
speeds of 5000-8000 rpm,<br />
<strong>and</strong> inlet flows to 200.000<br />
m3/hour. Applications<br />
include air compressors<br />
<strong>and</strong> cooling compression<br />
in LNG plants. Axial rotor<br />
photo: Dresser R<strong>and</strong><br />
• The larger oil <strong>and</strong> <strong>gas</strong><br />
installations use<br />
Centrifugal compressors<br />
with 3-10 radial wheels,<br />
6000 – 20000rpm (highest<br />
for small size), up to 80<br />
MW load at discharge<br />
pressure of up to 50bars<br />
<strong>and</strong> inlet volumes of up to<br />
500.000 m3/hour. Pressure<br />
differential up to 10.<br />
Photo: Dresser R<strong>and</strong><br />
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