SnubbingOperation is one of well services job using hydraulic system. Launched by Otis Engineering since 1929 and go international since 1950. Used for :
- Pulling and running a single or dual completion
- Running and pulling submersible pump
- Fishing
- Sand Washing
- Millilng Bridges and packer
- Squeeze cementing
- Drill out cement
- Through tubing gravel pack
- Acidizing
- Rig Assist
- etc
The technique of running on or out a pipe under pressure is more
economical by without first killing the well than to kill it. This typical
operation avoid damaging the production zone by penetration of mud / liquid
into the formation.
SNUBBING UNIT MAIN FEATURES
(HR 150)
BOP STACK
Working Pressure : 5000 psi, Cameron Type
Drift : 4
1/16"
Operating
press. (hydraulic actuating press.) : 1500 psi
Rams
block to accommodate : 1.315" ; 1.660" ; 1.900" ; 2 3/8" mac. pipe.
Functions : BOP
No. 1 : Stripping BOP
No.
2 : Stripping
BOP
No.
3 : Blind
rams BOP
No.
4 : Shear
ram BOP
No.
5 : Safety
BOP
No.
6 : Safety
BOP
· Well
Head Adaptor Flange : 4 1/16 x 3 1/16, gasket RX35
4
1/16 x 4 1/16, 5000 psi, gasket BX155
· Kill
Line : - two 2" x 5000 psi manual valves (1/4
turn).
- below BOP No. 3
· Equalizing
Line for BOP No. 2 :
- one hydraulic actuated valve 2" x 5000
psi.
- one manual valves (1/4 turn) 2" x 5000
psi.
· Bleed
Off Line : - one hydraulic
actuated valve 2" x 5000 psi.
- one manual valve (1/4 turn) 2" x 5000
psi.
- below BOP No. 1.
· One
Spacer Riser : 4 1/16" x 5000 psi for 1.315 to 3 1/2
pipe length 0.5 m : between BOP No. 1 & No. 2.