One of the thermocouple on lube oil of gas turbine is bleeding out of lube oil...every thing is ok...i can't understand what is the reason?

it may broked or it doesn,t fixed proberly so you can change it

sir,   thermowell is ok... drawout and checked...2 years ago same problem i have faced on vibration probe of syn-gas compressor(ipc casing).

new thermoweel is inserted...but after few days same problem appear again... instrument department dismantled the thermocouple.

Most probably  thermowell  is broken / having leakage, so lube oil is bleeding out.

Need to change the thermowell.