stack up

[freelancer_06]

The drillfloor height is to permit the installation of a 11" or 13-5/8" 15M BOP in the event the rig is used to drill deeper Devonian targets. The 15M BOP will be a rental option.

The depth of the cellars in field is 3 ½ ft the preset 30" conductor is cut at 26" below ground level. This means that the envisaged maximum stack up of the wellhead will be no greater than 130" from ground level to top of wellhead/bottom of BOP spool.

еще тут встерчается

Insert name of manufacturer,
Insert date and place of manufacture
Set back and loading limits,
rotary table elevation,
Provide a stack up drawing of available clear working height beneath rotary.
Confirm the possibility of installing a 15M BOP within the substructure dimensions

[freelancer_06]

вроде блок превенторов