Drilling media injection for rotating blowout preventors
Improvements in the operation of a rotating blowout preventor. The rotating head assembly of a rotating blowout preventor includes a stripper rubber which has an upper annular member attached to the lower annular end of a metal support member. The support member extends upwardly into fixed relationship respective to part of the rotating head. The stripper rubber is in the form of an annular body which has an axial passageway formed therethrough for telescopingly receiving a rotating member in sealed relationship therewith. The outer circumferentially extending lower wall surface of the rubber rotatably engages the lower marginal inside wall surface of a fixed washpipe. The present invention provides a positive pressure of drilling media, or drilling media admixed with lubricant, at the interface formed between the outer rubber surface and the inner surface of the washpipe. In another form of the invention, the drilling media flows into the bearing chamber of the rotating head and then into the interface between the rubber and washpipe, so that debris cannot enter either part of the RBOP.
- Assignee:
- IFI; EDB-86-085090
- Patent Number(s):
- US 4529210
- OSTI ID:
- 5944807
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BLOWOUT PREVENTERS
COMPRESSIBLE FLOW
DRILLING FLUIDS
ELASTOMERS
FLUID FLOW
FLUID MECHANICS
FLUIDS
FOULING
HYDRAULICS
INTERFACES
LUBRICANTS
MECHANICAL STRUCTURES
MECHANICS
MOTION
OPERATION
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLES
PARTICULATES
POLYMERS
ROTATION
RUBBERS
SEALS
SUPPORTS