Blowout Preventer (BOP) Stack

Background Blowout Preventer (BOP) stack is a tower of gates

and valves that is used during an oil well drilling stage.

BOP stack prevents blow out of oil from the borehole due to pressure variations during drilling.

BOP stack includes various technologies including:

Annular Preventers,

Shear RAMs.

BOP stack preventers’ movement is hydraulically controlled.

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BOP Stack (Christmas Tree)

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BOP Stack

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Annular

Dual Shear RAM

HydraulicAccumulators

HydraulicPODS

BOP Stack

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Annular

DualShearRAM

ShearRAM

Annular Preventer

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Cross Sectional

view

Annular Preventer

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Double Shear RAM

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Shear RAM Hydraulics

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Hydraulic Fluid Control

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Types of Contaminants

Solid Particles

Formed as part of normal operation

Effects: streaks, scraping, ceasing.

Water

Present as moisture and condensation.

Effects: oxidation and rust.

Air & Gases

Effects: higher viscosity, micro slippage

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Contamination Leads to Lubricant Breakdown

Avoid Detrimental Situations

Oil oxidation grows rapidly

TAN increases

TBN decreases

Oil additive depletes

Varnish development increases

Sludge deposit increases

Machine is unprotected

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Remove Contaminants & Stop Oil Breakdown

0

2

4

6

8

10

12

T.A.N

No water, no metal - T.A.N. after 3500 hrs

Water + metals - T.A.N. after 100 hrs

Oil oxidation

T.A

.N.

Th

e A

cid

Nu

mb

er (

hyd

rau

lic)

0.17

11.8

Triple R OSCA

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Hydraulic Oil Samples

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Maintaining Clean Oil Ensures Proper BOP Operation Each Time

Sheared Drilling Pipe

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Shear Blade

Actu

al P

ipe S

heared

by a

RA

MShear Blade

Screw Type Shear RAM

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Triple R MEA

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info@triple-r-mea.com