gas kick detector
DESCRIPTION
Early Kick Detection for Deepwater Drilling: New High Resolution Method with Ultrasound Early detection of gas kicks in water and oil -based mud is possible through a new improved ultrasound technology in a new quality. Until now, concerns about the speed of sound measurement of oil -based drilling muds partially saturated under high hydrostatic pressure. But it is possible with new circuits, to measure even the smallest time differences. In particle physics it has for a long time standard in studies on particle accelerators to analyze the trajectories and durations of the components of the atoms in the range of picoseconds. With this technology you can dissolve the sound velocity is very high. For example, can be measured with a standard deviation of better than 1 nanosecond with a measurement base of 20 inches (0.5 meters) between transmitter and receiver, the transit time of the ultrasonic wave. This corresponds to a longitudinal spatial resolution better than 10 mm per second. The signal noise of the ultrasonic wave can be lowered below a nanosecond through appropriate measures. The new solution for the early detection of gas kicks, therefore the measurement of the speed of sound of the P wave in the mud inside the marine riser is proposed. In measuring systems, the velocity resolution was confirmed. So as to obtain a sensitive measuring tool, which is able to detect the speed of sound in different discontinuity saturation of the dissolved gas, even at very high pressures. A plurality of detectors are arranged at different depths, can be seen the different signal changes in correlation with the hydrostatic pressure. At the same time to speed the attenuation of the ultrasonic signal is measured. The higher the percentage of gas bubbles and with an increase of the gas volume of the gas bubbles, the attenuation of the ultrasonic signal is increased. With decreasing hydrostatic pressure, the proportion of free gas will rise very quickly and be recognized as a loss. The system is universal for all marine riser applicable. Also riserlose installations with mud return lines can be equipped with specific systems. The method and devices are patent penting.TRANSCRIPT
EarlyGas Kick Detection with ultrasound
F.-M. Jäger
IBJ Technology
Colkwitzer Weg 7
04416 Markkleeberg
Germany
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 1
(IBJ deep sea gas kick detector)
Gas Kick measurement of marine riser
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 2
Sound path without reflection on the drill pipe
Ultrasonic Gas Kick Detector
Gas Kick measurement of marine riser
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 3
2 floors with sound paths turned 90 °
Ultrasonic Gas Kick Detector
Gas Kick measurement riserless
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 4
Sound path in the mud line
Ultrasonic Gas Kick Detector
M ud
Re c ive rTra nsc ive r
Gas Kick measurement for the deep sea
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 5
Same sensors for all applications
Ultrasonic Gas Kick Detector
Sensor
Sensor
Sensor
Sensor
Gas Kick measurement – physical effects
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 6Ultrasonic Gas Kick Detector
Hydrocarbons andLiquified gases
Sound speed is becames smaller
Gas bubbles Amplitude becomes smaller
Sound speed can change something
Measurement of sonic speed
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 7Ultrasonic Gas Kick Detector
h:min:s
14:47:30 14:50:00 14:52:30 14:55:00
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
Schreiber 0
kick 1
kick 2, 3mud
hydrocarbons
liquid gases
Measurement of sonic speed
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 8
same situation - higher resolution
Ultrasonic Gas Kick Detector
h:min:s
14:47:30 14:50:00 14:52:30 14:55:00
1590,0
1589,5
1589,0
1588,5
1588,0
1587,5
1587,0
1586,5
1586,0
1585,5
1585,0
Schreiber 0
kick 1
kick 2
kick 3
Gas bubbles measurement
IBJ TechnologyIBJ TechnologyIngenieurbüro JägerIngenieurbüro Jäger 9Ultrasonic Gas Kick Detector
h:min:s
09:24:00 09:24:30 09:25:00 09:25:30 09:26:00 09:26:30 09:27:00 09:27:30 09:28:00 09:28:30
3250
3000
2750
2500
2250
2000
1750
1500
1250
Schreiber 0
without gas bubbles
gas bubbles 20 ml/min
gas bubbles 50 ml/min