Method for servicing offshore well
Patent
·
OSTI ID:6821584
This patent describes a method of servicing a cased offshore well having a subsea blowout preventer stack and a riser extending from said stack to an above-water work area, said blowout preventer stack including sealing rams. It comprises: running a sealing nipple, which is open at its lower end and closed at its upper end except for a wireline packing means and which has a wireline extending through said wireline packing means, from said work area down through said riser into said blowout preventer stack to a position adjacent said sealing rams. The wireline being attached to a cement bond logging tool extending below said sealing nipple; closing said sealing rams about said sealing nipple and pressurizing said well below said blowout preventer stack to a level sufficient to eliminate any microannulus between the casing of said well and cement surrounding said casing by application of fluid pressure to said well from a pressure line extending from said work area; operating said cement bond logging tool in said well; opening said sealing rams; and removing said sealing nipple and cement bond logging tool from said blowout preventer stack and riser.
- Assignee:
- Conoco Inc., Ponca City, OK
- Patent Number(s):
- US 4905763; A
- Application Number:
- PPN: US 7-294335A
- OSTI ID:
- 6821584
- Country of Publication:
- United States
- Language:
- English
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