Blowout preventer stacks and method of tensioning stack tie rods
An apparatus is described for use on a rig for drilling a well consisting of: a blowout preventer stack including a plurality of members with a flange on the lower stack member and tie rods extending through the flange and being secured to the upper stack member to tie said members of the stack together in sealed relationship and fastening means on the lower ends of the tie rods, and a test stump having means for supporting the stack thereon, having engaging means for engaging the lower ends of the tie rods and having pressure responsive means for exerting a downard force on all of the tie rods while the stack is supported by the supporting means to preset tension in the tie rods to allow the fastening means on their lower ends to be tightened to retain the preset tension in the tie rods.
- Assignee:
- Cameron Iron Works, Inc., Houston, TX
- Patent Number(s):
- US 4580628
- OSTI ID:
- 5839600
- Resource Relation:
- Patent File Date: Filed date 19 Apr 1984
- Country of Publication:
- United States
- Language:
- English
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