Transcript Well Problems

SENSORS & GAS SYSTEMS
SENSORS
SENSORS CATEGORIES
DEGITAL
ANALOG
Degital Sensors
Depth Wheel.
Stroke Counter.
Degital RPM.
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
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.
Torque
1. Electric
measures the rotary
table current in
amperes.
2. Mechanical
Very similar to
hookload.
Exit. 24v, out put 420ma.
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).
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:
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.
Temperature
Either semiconductor
thermistor
transducers or
platinum resistance
elements (PRT).
8.5 volt excitation
voltage. output
between 270 and 370
microamps.
Conductivity
The out put signal is
between 4 - 20 ma.
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.
FID Gas System