Vetco Riser .pdf

7/23/2019 Vetco Riser .pdf

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ABB Vetco GrayABB Oil, Gas & Petrochemicals

Drilling Riser

Connects the subsea BOP to

rig equipment.

Provides conduit to run and

retrieve tools and equipment to

and from wellbore, and the means

to circulate fluids into and out

of the well below a closed BOP

(choke and kill lines)


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Drilling Riser Design

Riser Sizes based on the BOP size.

BOP Size Riser Size

13-5/8 16

16-3/4 18-5/818-3/4 21

20-3/4 24

21-1/4 24


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API Riser Coupling Class Tensile capacity in millions

of pounds

Class A .5

Class B 1

Class C 1.25

Class D 1.5

Class E 2

Class F 2.5

API RP 2R establishes riser coupling classes

based on the tensile capacity of the coupling.

These are;


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Individual riser joints

Each includes -

specialty end couplings, box and pin

choke and kill linesauxiliary high pressure lines

guides

optional bouyancy modules


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Stabbing the first riser joint onto

the LMRP


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MR-6E Riser coupling


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Actuating screw boss,actuating screw, and spring

loaded locking sleeve


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Locking

Dog


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Guide

plates


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Choke and killline clamps


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Type HMF riser handling subs


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Riser handling spider


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Choke and kill line

male stab


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Choke and kill line

female stab


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Type HMF Riser Coupling


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Choke & Kill Line Test Caps


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HMF Lifting Tool


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Riser Autofill Valve

Prevents the riser from collapsing under

external pressure in the event of sudden

mud loss.

An outer sliding sleeve opens

automatically, allowing sea water to fill

the riser, when the internal pressure ofthe valve falls to 150 p.s.i. less than the

external pressure.

The valve should be run at least 325

below the surface.

Override system permits hydraulic

actuation of the valve from the surface.


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Emergency Riser Disconnect

The emergency riser disconnect can be

run anywhere in the riser above the LMRP

to provide a secondary means to

disconnect the riser from the BOP.

The pul to separate the emergency riser

disconnect is always axial to the

centerline of the riser. Therefore no forces

bind the coupling to keep it from

separating, regardless of how far the

vessel is off the hole.


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Instrumented Riser Joint

The Instrumented Riser Joint provides ameans for monitoring a number of

parameters

associated with the ue of deep water riser

systems.

These parameters are measured by sensors

incorporated into a riser pup joint multi-plexed,

by a subsurface electronics assembly, and

transmitted to the surface using a small

diameter

armored logging cable. Data is converted at

thesurface to an output signal for readout and/or

storage.


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Telescopic Joint(Slip Joint)


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Inner Barrel

Packer housing

Riser Support Ring

choke and kill line terminals

Outer Barrel


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Type SDL Riser Support Ring

The Type SDL Riser Tensioner Ring saves

time because the riser tensioner cables are

never disconnected.

When the riser is pulled the tensioner ring willbe carried up to the bottom of the diverter

housing. Hydraulic latches release the ring

from the slip joint and permit it to be locked

onto the diverter housing using another set

of hydraulic latch dogs. The rest of the riser

is retrieved through its center.


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Type SDL Riser Support Ring

Hydraulically actuated

riser support dogs

Diverter stow dogs Tensioner ring pad eyes


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Type KT Riser Support Ring

Like the Type SDL Riser Support Ring

the type KT Riser Support ring need

not be disconnected from the riser

tensioner cables. Additionally the choke

and kill line hoses neen not bedisconnected.

The KT ring locks onto the diverter housing

for storage when not in use.


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Type KT Riser Support Ring

Tensioner ring pad eyes

Lock down/orientation dogsAuxiliary line termination

Fluid bearing

with carbon/teflon thrust bearing

Auxiliary line pin


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Diverter System

Type KFDS


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Diverter HousingDiverter Insert


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Diverter insert installed

on riser at rotary table


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CSO Diverter


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Single Ball Flex Joint


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Ball Joint in LMRP


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Diverter Ball Joint


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Single Flex Joint


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Single Flex Joint in LMRP


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Single Flex Joint

uCapable of 10odeflection from

vertical

uResilient bearing elements are

elastomer and steel plate

laminate

uSeal and bearing elements

uunder shear and compression

loads as flex joint is in tension

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