Importance

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Abstract

The disclosure defined by this invention is a method and assembly for conducting wireline operations in a deep, subsea location, which includes providing a rig on the surface of a body of water, having a riser extending from the rig floor to the floor of the deep body of water; a hydril positioned on the end of the riser on the sea floor; a plurality of blowout preventers positioned below the riser to prevent a blowout into the riser; a wireline subsea blowout preventer control head assembly lowered into the riser to the level above the hydril; pressuring off the assembly by the riser and blowout preventers; lowering a wireline down the riser into the assembly, so that the tool may be lowered beyond the blowout preventers to conduct wireline operations; and pressuring off the side entry apparatus, so that should a blowout occur during wireline operations, any pressure would be prevented from entering the riser, but would be contained by the side entry assembly.

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First Claim