Variable bore ram packing element and blowout preventer

Patent · Tue Apr 24 04:00:00 EST 1984

OSTI ID:6606467

Parks, Jr, G C

A blowout preventer and a seal are disclosed for sealing about pipes or other objects in a well bore. The seal element is a semi-circular section of resilient compressible material having a semi-circular inner surface to engage the pipe and embedded radially disposed support elements having anti-extrusion members which serve in combination with overlapping ram block members to prevent extrusion of the resilient material from the top and bottom of the seal. The top and bottom anti-extrusion members are stair stepped and have interlocking fingers and recesses and are adapted to slide radially and circumferentially with an adjacent anti-extrusion member element as the elements move toward or away from the pipe in the well bore. Flanges on the seal element are provided with top and bottom plates each of which overlaps at least one support element.

• Assignee: Hydril Company
• Patent Number(s): US 4444404
• OSTI ID: 6606467
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACCIDENTS
BLOWOUT PREVENTERS
BLOWOUTS
COMPRESSION STRENGTH
DESIGN
FLANGES
MATERIALS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
PLATES
SEALING MATERIALS
SEALS
SUPPORTS
WELLS