Method and apparatus for the installation and withdrawal of pump

Details Method and apparatus for the installation and withdrawal of pump Method and apparatus for the installation and withdrawal of pump

1980-09-25

1982-05-25

Novosad, Stephen J.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166360, 166362, 166 68, E21B 2300, E21B 33064, E21B 33068

Patent

active

043312039

ABSTRACT:
Methods and apparatus are disclosed for transporting submergible pumping equipment between an underwater well and the water surface and for installing the equipment in and withdrawing the equipment from the well. The apparatus includes a container in the form of an elongate casing in which the equipment is suspended and which is raised and lowered between the wellhead and the surface to transport the equipment therebetween, the casing being connected to wellhead apparatus for installation and withdrawal of the equipment in the well. The casing is divided by a series of blowout preventers into an upper and a lower chamber. In use, the equipment is transported in the lower chamber and a diffractant solution is circulated through the lower chamber while the upper chamber is maintained at a high liquid pressure to provide a barrier inhibiting leakage of contaminants from within the lower chamber to the outer environment.

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