The 29,990 dwt tanker Orchids had an engine room fire while off the Kannur coast of India.   The vessel contacted the Coast Guard which mobilized several fast patrol vessels to the scene.   The fire was quickly extinguished and the Orchids is continuing to Kochi under its own power.   No reports of injuries or pollution being released.  The vessel had left New Mangalore for Cochin Port with a cargo of gaoline.