SENSORS & GAS SYSTEMS

1. SENSORS & GAS SYSTEMS

2. SENSORS

3. Degital Sensors • Depth Wheel. • Stroke Counter. • Degital RPM.

4. Analog sensors • HOOK LOAD. • Use a pressure transducer and normally installed on the dead line anchor system • exitation is 24DCV • the out put is 4 - 20 ma

5. Analog sensors • STAND PIPE PRESSURE. • 1- Use Dynisco Strain Gauge Transducer • 4 wires • exitation is 15DCV. • 2- Current Loop: • Very similar to hookload. • Exit. 24v, out put 4-20ma • 2 wires.

6. Torque • 1. Electric • measures the rotary table current in amperes. • 2. Mechanical • Very similar to hookload. • Exit. 24v, out put 4-20ma.

7. RPM • The unit consists of a small low-power D.C. generator. This generator is driven via a belt and pulley from the rotary table drive shaft. • The unit produces 7 VDC per 1000 Revolution Per Minute (RPM).

8. Pit Volume • 1. Delaval: • use a non contacting magnetic float activate discrete reed switches in reed switch resistance string inside a stainless steel pole. The position of the float determines the resistance and hence the voltage fed to the computer. • 2. Ultra sonic:

9. Flow Out • 1. Padle • use a 10kom, 1 turn potentiometer. • - 10 DCV exitation • - 1 - 10 DCV signal. • 2. EWS: • measure the flow through generating induction voltage in a magnetic field.

10. Temperature • Either semiconductor thermistor transducers or platinum resistance elements (PRT). • 8.5 volt excitation voltage. output between 270 and 370 microamps.

11. Conductivity • The out put signal is between 4 - 20 ma.

12. Gas Trap • The mud trap assembly comprises an electric motor, impeller and trap chamber. • 110 volt power is supplied to the motor from the unit and the wattage used is monitored to indicate the status of the trap in the mud.

13. FID Gas System