Transcript Repair by Integrity Clamp

SCARAB/SAFFRON DEVELOPMENT
PROJECT
24” EXPORT LINE
REPAIR BY MECHANICAL METHODS
THIS SHORT PRESENTATION WILL PROVIDE
PRELIMINARY DETAILS OF TWO
METHODS:
1) REPAIR BY “INTEGRITY” CLAMP
2) REPAIR BY SPOOLPIECE END CONNECTOR
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Integrity Clamp
This repair type assumes that the damage to the pipeline will be
left as is and the structural integrity of the linepipe in the area
of the damage be restored by a pipeline structural integrity
repair clamp.
These types of clamp are installed on to the pipe and have
gripping mechanisms which ensure that the longitudinal and
circumferential pipeline loads transfer through the body of the
clamp.
These clamps are commonly used as a permanent repair
solution in many operators’ Emergency Pipeline Repair
Systems.
The clamps can be either installed by diver or by ROV.
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Integrity Clamp
Diver Installed Repair Clamp - Details
(Example of Oilstates HydroTech)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Integrity Clamp
Diverless Repair Clamp - Graphic
(by Oilstates HydroTech)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Integrity Clamp
Diverless Repair Clamp - Deployment
(20” Oilstates HydroTech)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Integrity Clamp
ROV
monitors
arrival of
clamp at
site
ROV closes
clamp,
tightens
studs and
packing
flanges and
tests seals
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
ROV opens
clamp ready
for
installation
Lift frames
recovered
to the
surface.
Repair
complete
Repair by Integrity Clamp
Diver Installed Repair Clamp
(10” Oilstates HydroTech)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Integrity Clamp
Diver Installed Repair Clamp - Deployment
(12” Oilstates HydroTech Clamp)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Integrity Clamp
The track record of one supplier, Oilstates Hydrotech, shows
that 262 of these permanent repair clamps have been installed
worldwide between 1972 and 2003.
OilStates Hydrotech can supply a 24" ANSI 1500, full structural,
diver installed, permanent repair Hydroclamp.
Delivery, 16 weeks ex. Houston.
Cost $210,000.
Other possible suppliers are Oceaneering and PLIDCO
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Pipeline End Connectors
This repair type assumes that the damaged section of the
pipeline is cut out and a new spoolpiece installed into the
pipeline.
These types of connectors are installed on to the cut pipe ends
and have gripping mechanisms which ensure that the
longitudinal and circumferential pipeline loads transfer through
the body of the connectors. The spoolpiece is then deployed
with normal flanges to make the connection.
These connectors are commonly used as a permanent repair
solution in many operators’ Emergency Pipeline Repair
Systems.
The connectors can be either installed by diver or by ROV.
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Pipeline End Connectors
The repair requires the following components:
1: 2 No. 24" ANSI 1500, Collet Grip Flanges with
Viton seals and integral test port, one with axial end
gap adjustment.
2: 24" ANSI 1500, Ball Flange.
3: 24" ANSI 1500, Swivel Ring Flange.
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Pipeline End Connectors
Collet Grip Flange Connector
(Example of Oilstates HydroTech)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
The connection is made
by installing this
connector on the pipe
cut end first. The
spoolpiece is then
installed with standard
flange ends (see later
slides). The connector
can
provide two degrees of
freedom for makeup
flexibility: 360° of
rotational freedom, and
axial stroke capacity of
typically 1 foot.
Repair by Pipeline End Connectors
Ball Flange Connector
(Example of Oilstates HydroTech)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
The device provides make up to
industry standard flanges,
adding four degrees of freedom
for makeup flexibility.
The bolt hole flange swivels
360° to accommodate rotational
alignment with the mating
flange. Additionally, the spherical
components allow angular
adjustment up to
12½° from the tubular's axis in
any plane for flange face
alignment.
Repair by Pipeline End Connectors
The swivel ring flange permits
360 deg. Rotation of an outer
ring around a hub, to allow easy
alignment of bolt holes when
attaching to a mating standard
flange
Swivel Ring Flange
(Example of Oilstates HydroTech)
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Pipeline End Connectors
Morgrip Coupling
(An alternative method of mechanical connection)
MORGRIP couplings can be used as a tie in method for any type of
pipeline without having to use flanges or hub connections. The
couplings are installed with the spool and slipped over the pipe joints
and activated to make the connection
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA
Repair by Pipeline End Connectors
The budgetary costs from two suppliers of the repair
components are:
1: 2 No. 24" ANSI 1500, Connector Flanges supplier A
= $277,500 : supplier B = $171,000
2: 24" ANSI 1500, Ball Flange = $72,500
3: 24" ANSI 1500, Swivel Ring Flange = $26,750
Total supplier A = $376,750 and supplier B = $270,250
Delivery from supplier A is 20 weeks and from supplier B
is 6 weeks
Dr D Muir BSc.MSc.PhD.CEng.FIStructE.FRINA.MIQA