Blowout preventer having a variable ram seal

Patent · Tue Jun 01 00:00:00 EDT 1982

OSTI ID:6468968

Nelson, N A

A blowout preventer is disclosed as including a ram-type seal element which can be compressed and deformed to seal around a variety of pipe sizes. The seal element is molded from a resilient rubber material and includes a generally semicircular section to sealingly engage pipes. A plurality of metallic support elements are embedded in the seal to support the rubber material for deformation essentially only in a radial inward direction to conform to the drill string pipe size, when force is applied to the seal by the ram hydraulic system.

• Assignee: N L Industries Inc
• Patent Number(s): US 4332367
• OSTI ID: 6468968
• Resource Relation: Patent File Date: Filed date 2 May 1980; Other Information: PAT-APPL-146077
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
NATURAL GAS WELLS
BLOWOUT PREVENTERS
OIL WELLS
SEALS
DESIGN
COMPRESSION
DEFORMATION
MOLDING
PIPES
RUBBERS
SUPPORTS
ELASTOMERS
FABRICATION
MECHANICAL STRUCTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing