DETECT, MITIGATE & RECOVER FROM DOWNHOLE STALLS
OVERVIEW
By increasing bit and BHA reliability, this technology can help decrease sidetracks or lost in hole occurrences and increase motor and bit longevity, translating into more footage drilled per BHA and reduced time to target.
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Dynamic, real-time calculations
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Reduce premature BHA failure
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Software-based system with no downhole tools required
Frequent stalls = premature BHA failures. StallAssist® from H&P can help.
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Driller enters maximum operating and stall differential pressure from the motor manufacturer for rotary and slide drilling.
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Control system monitors the differential pressure based on the performance limits entered and the rate of exchange in differential pressure to determine when a stall has occurred.
SEQUENCE USED FOR REACTING TO & MITIGATING A STALL
1. Rotation or oscillation is stopped
2. Autodriller is switched off
3. Pumps are stopped or reduced depending on configuration
4. Surface torque is unwound
5. Drillstring is picked up off bottom
6. Flow is re-established
7. Rotation is re-established
