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06 Riser Margen

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Mesut Özil
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10 views5 pages

06 Riser Margen

Uploaded by

Mesut Özil
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PPT, PDF, TXT or read online on Scribd
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A calculated pound per gallon

increase that will be added to


the present mud weight.
Prior to the removal of the marine riser, the
riser shall be displaced with sea water.

Sufficient hydrostatic pressure or other suitable


precautions, such as mechanical or cement
plugs or closing the BOP, shall be maintained
within the well bore to compensate for the
reduction in pressure and to maintain a safe
controlled well condition.
Calculated the present BHP
ANSWER: 4,332 psi

Calculated the loss of mud HP


ANSWER: 1,845 psi
Air Gap Flow Line
90 ft 120 ft
Calculated the sea water HP
ANSWER: 1,565 psi
Sea Water Riser
3,500 ft 9.8
8.6 ppg ppg Calculated the HP difference between
mud HP lost and sea water HP
ANSWER: 280 psi
Casing
4,000 ft Convert 280 psi to a ppg at 4,880 ft
ANSWER: 1.1 ppg Riser Margen
Open Hole
880 ft Mud weight to be spotted
8,500 ft ANSWER: 10.9 ppg

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