Deepwater sub sea capital equipment

1. Rig & equipment
selection continued
Peter Aird
November 2008

2. Sub Sea Capital drilling equipment
1. Diverter
2. Spider / Gimbal
3. Riser Coupling
4. Upper Flex Joint
5. Telescopic Joint
6. Tensioning Ring
7. Intermediate Flex Joint
8. Termination Joint
9. Riser Adapter
10. Single Flex Joint
11. BOP Connector
12. Wellhead Connector
13. Wellhead
3
1
2
6
4
7
9
13
5
8
10
11
12
3
1
2
6
4
7
9
13
5
8
10
11
12

3. Standard Diverter system
 Pressure rating
 Internal diameter
 Seals
 Testing
 Limitations!
 Handling gas at
surface

4. 1. Deepwater diverter system
 Used on the majority of floating rigs
 Complete open-hole shutoff with 20”
through-bore
 Rated 1,000 psi for closure on 5” drill pipe;
500 psi for closure on open hole
 10 second closing time on pipe or open
hole
 Housing accommodates large diameter
riser buoyancy modules
 High capacity systems available for
supporting the Riser String from Diverter
Housing in emergency hang-off situations

5. 2.1 Spider
 Hydraulic-gate riser spider
is used when running or
retrieving riser joints
through the rotary table
 Riser handling spider
supports the riser string
on manual or hydraulically
operated sliding dogs

6. 2.2 Riser Gimbal
 Gimbal shock absorber
supports up to 2,000,000
lb and gimbals when the
riser is positioned in the
spider
 Reduces impact loads
when running and landing
marine riser joints

7. 3.1 Riser connector
 Easy stabbing, fast makeup, and positive
alignment
 Suitable for operating in water depths up
to 7,500 ft depending on environmental
and well control conditions; MR-10
designs can operate in depths to 10,000
ft.
 Preloaded connection significantly
reduces the range of alternating stresses
induced by cyclic loading to improve
fatigue life
 Primary load path for tensile and bending
loads through the dogs and into the body,
does not impact actuating screws

8. 3.2 API Riser Coupling Class
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
Class H 3.5
API RP 2R establishes riser coupling classes based on the
tensile capacity of the coupling. These are;

9. 3.3 Riser coupling
 Ideal for deep water applications
where high load operating
conditions exist
 Stepped diameter design of pin
and box simplifies engagement,
even with severe vessel
movement
 No loose parts preventing bolt loss
and potential thread damage
 Field removable and replaceable
nose piece
 Locking bolts preloaded in excess
of rated coupling loads to extend
fatigue load of riser system

10. Drilling riser (1)
 Choke line
 Kill line
 Hydraulic lines
 Prepared for
buoyancy
 Seals
 Testing considerations

11. Drilling riser (2)

12. Drilling riser (3)

13. 4. Riser Flex joint
 Tensional capacity
 Through bore
 Ball joint limits

14. 5. Telescopic Joint
 Compensates for heave and
offset of the vessel
 Maximum rated riser tensile
load capacity in locked
position
 Hydraulic latch release for
inner and outer barrels
available
 Dual split/solid packer
elements
 Fixed or rotating integral/non-
integral tensioner rings

15. 6.1 Riser support ring
 The Type Riser Tensioner Ring
shown 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.

16. 6.2 Tension ring
 Telescopic Joint is run and pulled through the rotary table
without disconnecting the tensioning lines from riser tensiong
ring
 Riser tensioning lines remain properly spaced out at all times
 Hydraulic piping for lockdown/storage dogs remains
permanently connected
 Hydraulically disconnects from telescopic joint and locks to a
mating profile on the bottom of the diverter housing for
convenient, out-of-the-way storage

17. 6.3 Ultra deep tension ring
 Forms a termination point between the riser
tensioner and the marine riser system
 Simplifies running and retrieving marine
riser by eliminating makeup/breakout of
tensioner lines and hydraulic hoses in the
moon pool area
 Choke, kill, and auxiliary line terminations
permanently connected
 Orientation pins on the ring engage slots in
telescopic joint line termination housing for
easy makeup
 Permanently installed tensioner lines
maintain proper orientation with rig drilling
tensioners

18. 7. Intermediate Flex Joint
 Installed below the telescopic joint
 Up to 2.5 million lb tensile load capacity
 Angular deflection to 20 °on either side of its axial
center while subjected to tensile loading and
internal pressure of 1500 psi
Intermediate Flex Joint shown uses a KT ring and no termination joint.

19. 9. Riser extension (adaptor)

20. 10. Single flex joint
 Installed in the LMRP below the
riser/BOP Stack Interface
 Uses a combination elastomeric
bearing and seal unit to eliminate
the need for a pressure balanced
ball and socket interface with
seals
 Up to 2 million lb tensile load
capacity
 Rated for H2S service and oil-
based drilling mud
 Angular deflection to 10° on either
side of its axial center while
subjected to tensile loading and
internal pressures up to 3000 psi
 Pressure balance and lubrication
systems not required

21. 11-12 System design aspects
 System Objective:
 Solution for drilling in
ultra deepwater drilling
 BOP Flange
 Wellhead Connector
 Subsea Wellhead System
 Conductor Sizing
(Analysis)
 Conductor/Casing
Connectors
 15,000 psi to 20,000 psi
rated pressure
 7,000,000 ft.-lbs.
Bending @ 15,000 psi
F
~6.6 MM ft-lbs
~7 MM ft-lbs
~7.7 MM ft-lbs
~14 MM ft-lbs
(40' Below Mudline)
~8.4 MM ft-lbs

BOP Flange
Wellhead
Connector
Wellhead
System
Conductor/
Casing
Connectors
F
~6.6 MM ft-lbs
~7 MM ft-lbs
~7.7 MM ft-lbs
~14 MM ft-lbs
(40' Below Mudline)
~8.4 MM ft-lbs

BOP Flange
Wellhead
Connector
Wellhead
System
Conductor/
Casing
Connectors
BOP Flange
Wellhead
Connector
Wellhead
System
Conductor/
Casing
Connectors

22. Questions?