Equip-3(closing unit).ppt

1. Closing Unit

2. Closing Unit

9. 1-Shear rams open
Shear Rams operation

10. 2-Shear rams closing
Shear Rams operation

11. 3-Shear rams closed
Shear Rams operation

18. BOP closing unit ( Koomey unit )

19. SCHEMATIC FOR CLOSING UNIT
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20.  Accumulators
 Standard bladder type

21. Each bottle is called ten gallons bottle
3000 psi
1200 psi
Usable fluid
(Recoverable oil)
N
Oil
Accumulator Bottle
The Precharge pressure is 1000 psi for the 3000 psi working
pressure accumulator unit
Minimum working pressure is 200 psi above precharge pressure

22. 1. Bottles to be able to (with pumps off)
- Close annular
- Close all rams
- Open one HCR
- Remaining pressure shall be at least 200 psi above
precharge pressure (1200 psi ).
2. Useable Fluid: Fluid recoverable between operating
pressure (3000 psi) and minimum operating pressure
(1200 psi) or (200 psi) above pre charge pressure.
Information from the API RP53

23. 3. Reservoir Capacity: At least twice useable fluid of
bottles.
4. Accumulator precharge
A. The precharge pressure should be measured each
well
B. Minimum precharge pressure for 3000 psi working
pressure accumulator should be 1000 psi
C. Only nitrogen gas should be used.

24. 5-Pump Systems
•With accumulators isolated pump should be capable of closing
the annular and open the hydraulic choke (HCR) and return
system to normal annular pressure in 2 minutes.
•Electric pump will automatically start when system pressure has
decreased to 90% of system working pressure.
•A pump system consists of one or more pump each pump should
have independent power source.

25. 7. Pressure Test Frequency
Pressure test on well control equipment should be at least:
1. Prior to spud or upon installation.
2. After disconnection or repair of any component
3. Not to exceed 21 days.
6. Closing time RAM Annular
Smaller than 18 ¾” 30 sec max. 30 sec max.
18 ¾” and larger 30 sec max. 45 sec max.

26. 8. Shell or Body Test at manufacturer Shop
1 ½ times BOP rating I.e. 150% of pressure rating.
9. Closing Ratio
Ratio of well head pressure to pressure required to close the BOP.

27. 10. Choke Lines
1. Minimum recommended size for choke line is 2 inches for 3K and
5K arrangements and 3 inch for 10K and 15K.
2. Minimum recommended inside diameter for lines downstream of
choke should be equal to or greater than the connecting lines of
the choke (choke line).
3. The bleed line should be at least equal in diameter to the choke
line this line allows:
a) Circulation of well with preventors closed while
maintaining a minimum back pressure.
b) Permits high volume bleed off of well fluids to relieve
casing pressure with the preventers close.

29. Remote control panel

31. Remote control panel
When the BOP ram in the close position close line has 1500 psi.
When the BOP ram in the open position open line has 1500 psi.
When the 4 way valve shifts the micro switch will activate the light to illuminate.
When light illuminates, it tells us that oil on its way to the BOP function.
Rig air
120 psi
4 Way valve and
micro switch
Oil

32. Indicator Lights on BOP Remote Panel
A micro switch is located at the main unit, it will send a
signal to the indicator lights to change color only when the
4-way valve shifts.
Indicator lights, don’t tell us that the BOP’s function
has completed, but they tell us that the 4-way valve is
already shifted and the oil is flowing under pressure to
move the functions piston to complete the close or open
operations.

33. indicator lights Problem
while shutting in a well from remote panel
2.If indicator light does not illuminate and pressure gauges
don’t drop, it means that no oil has been used and BOP
piston does not move, the cause could be
a)4-way valve failed to shift.
b)Master control valve is not depressed
with the control valve of the function.
c)No air pressure is going to the remote panel.
1.If indicator light does not illuminate, but gauges drop
and later rise back up which means that oil has been
used to move the piston of the BOP and the function is
completed so the cause is (BULB has blown).

34. indicator lights Problem
4.If indicator light illuminates and pressure dropped
but not rise back up it means that oil has been
used, function completed but there is LEAK in
hydraulic system.
5.If indicator light illuminates and pressure dropped
then the manifold pressure raised back up to 1500
psi but accumulates pressure did not raise back up to
3000 psi.
3.If indicator light illuminates but pressure gauges do not
drop it means that the 4-way valves has shifted but
hydraulic line between the 4-way valve and the BOP is
plugged.