Vetco Riser .pdf

Drilling Riser ØConnects the subsea BOP to rig equipment. ØProvides 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)

ABB Vetco Gray ABB Oil, Gas & Petrochemicals

Drilling Riser Design Riser Sizes based on the BOP size. BOP Size 13-5/8” 16-3/4” 18-3/4” 20-3/4” 21-1/4”


Riser Size 16” 18-5/8” 21” 24” 24”

API RP 2R establishes riser coupling classes based on the tensile capacity of the coupling. These are; 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


Individual riser joints Each includes •specialty end couplings, box and pin •choke and kill lines •auxiliary high pressure lines •guides •optional bouyancy modules


Stabbing the first riser joint onto the LMRP


MR-6E Riser coupling


Actuating screw boss, actuating screw, and spring loaded locking sleeve


Locking Dog


Guide plates


Choke and kill line clamps




Type HMF riser handling subs


Riser handling spider




Choke and kill line male stab


Choke and kill line female stab









Type HMF Riser Coupling


Choke & Kill Line Test Caps


HMF Lifting Tool









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 of the 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.


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.


Instrumented Riser Joint The Instrumented Riser Joint provides a means 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 multiplexed, by a subsurface electronics assembly, and transmitted to the surface using a small diameter armored logging cable. Data is converted at the surface to an output signal for readout and/or storage.


Telescopic Joint (Slip Joint)


Inner Barrel Packer housing

Outer Barrel Riser Support Ring

choke and kill line terminals


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 will be 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.


Type SDL Riser Support Ring

Diverter stow dogs

Tensioner ring pad eyes

Hydraulically actuated riser support dogs


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 be disconnected. The KT ring locks onto the diverter housing for storage when not in use.


Type KT Riser Support Ring Fluid bearing with carbon/teflon thrust bearing

Tensioner ring pad eyes

Auxiliary line pin

Auxiliary line termination


Lock down/orientation dogs

Diverter System Type KFDS


Diverter Insert


Diverter Housing

Diverter insert installed on riser at rotary table


CSO Diverter


Single Ball Flex Joint


Ball Joint in LMRP


Diverter Ball Joint


Single Flex Joint


Single Flex Joint in LMRP


Single Flex Joint uCapable of 10o deflection 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


Vetco Riser .pdf

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