Wireline blowout preventer

Patent · Tue Apr 22 04:00:00 EST 1986

OSTI ID:5784046

Ahlstone, A

A wireline blowout preventer is described which consists of: a valve body, a well bore extending through the valve body, a pair of axially aligned ram guides in the valve body intersecting the well bore, a ram in each ram guide, means for moving the rams between an open spaced-apart position in which the rams are retracted into the ram guides and a closed position in which the rams are moved into the well bore for closing the well bore, each ram including a ram body, an axial stem attached to the ram body and a seal insert removably mounted to the ram body, each seal insert having elastomeric seal means defining a forward seal face, a rigid cup set into the seal face and defining a cup cavity. The cups join to define a chamber between the rams in the closed position, conduit means extending axially through one or both of the ram bodies and its corresponding stem and seal insert and opening into the cup for injecting a packing material into the chamber. The elastomeric seal means are compressed axially in the closed position, and extrusion guide means for directing flow of the compressed elastomer for making an inner seal surrounding the joined cups to seal the chamber.

• Assignee: NOV; EDB-86-114522
• Patent Number(s): US 4583569
• OSTI ID: 5784046
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BLOWOUT PREVENTERS
COMPRESSION
CONTROL EQUIPMENT
DESIGN
ELASTICITY
EQUIPMENT
FLOW REGULATORS
MECHANICAL PROPERTIES
NATURAL GAS WELLS
OIL WELLS
PACKINGS
SEALS
TENSILE PROPERTIES
VALVES
WELLS