The Cameron SSD-II space-saving diverter wellhead system is a compact, 11-in, quick-makeup multibowl system featuring independent load shoulders that eliminate the need to install isolation bushings or dummy hangers when only one casing string—the production string—is run. The wellhead can be used for both single and multiple casing strings.
The two load shoulder profiles—located in a housing featuring upper and lower outlets studded with valve removal (VR) plug capability—enable independent running of the intermediate (typically 7-in or 7 5/8-in) and production (typically 4-in to 5 1/2-in) casing hangers. Eliminating the intermediate string does not necessitate use of isolation bushings.
Wellhead installation time and exposure to open hole are minimized by reducing the number of BOP makeup or breakout connections. Multiple casing strings are run through the BOP and riser.
Internal locking mechanisms mitigate exposure to working under a heavy load or in a confined space. The absence of external lock screws and unnecessary penetrations for locking in casing strings also eliminates associated leak paths and HSE concerns.
The SSD-II wellhead system uses a spin-on flange, reducing its overall cross section. It can therefore be run through a rotary table or riser diverter system to land out on a load ring located in the conductor. A spin-on API bolt prep flange is then installed for conventional makeup, eliminating the need for a special tubing head or a tree adapter.
The SSD-II system features internal components that are common to all Cameron multibowl wellhead systems.