Phuel BOP System, User Manual

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User Manual
Modular BOP System (Dual)
OPS-3653-Rev A 1
1 Introduction
1.1 General
The Modular Blow out Preventer (BOP) provides essential safety barriers
against well pressure during wireline operations. It is located directly above
the wellhead flange. The BOP has two or more sets of wireline rams for
sealing against slick line and then sealing against the well pressure.
The ram consists of a hydraulic piston that can be extended or retracted to
energise or retract the ram. The ram has a set of inner and horse shoe seals
that when compressed against the opposite ram forms a continuous seal that
is further energised by the application of pressure in one direction. The ram
consequently can be arranged so that it holds pressure from below the BOP
or from above.
Across the rams there is an equalisation valve assembly. This is used to
equalise pressure across the rams so that the rams can be withdrawn to open
up the well bore. The equalisation valve assembly consists of a cone seal set
on a screw. Unwinding the screw opens the valve and allows equalisation
across the rams. Tightening the screw closes the seal and prevents pressure
from passing through the valve assembly. There is also a circuit to allow the
injection of chemicals into the well or across the equalisation valves, and can
be used to prevent the valves freezing while bleeding down gas (injecting
glycol for example).
Between each of the ram pairs it is possible to inject grease through the
injection port. For braided line operations or in cases where an effective seal
cannot be achieved, the injection port can be used to inject grease at
pressures greater than the well head pressure. The injection port has a check
valve to prevent well pressure entering the injection system.
The BOP is mounted to a crash frame assembly that provides forklift pockets
protection during transport. The crash frame has foldable platforms for the
operators to stand on when operating the BOP and stabbing in the lubricator
(not shown in diagrams below).
This user manual serves as an introduction to the equipment and contains the
relevant specifications, operation, planning and maintenance instructions,
parts list and drawings.
1.2 Product Identification
Phuel products are identified by a unique serial number that facilitates full
product traceability. Each product is supplied with a documentation pack that