Saunders_edit.qxp 23/10/08 12:44 Page 142
ThruLife – Integrity Management of Deepwater Subsea Systems
anomaly reports, periodic review reports, etc. These reports can take The next generation of integrity management software is starting to
some time to develop due to their size and, as a result, can be out be adopted by the industry. It takes the next step by intelligently
of date before they are finished. Equally, the size of the reports analysing the data, assessing changes in integrity status and visually
makes it difficult to identify key strategic issues hidden in the detail. reporting back to the end-user both strategic and detailed
Again, integrity management software solutions exist in the industry information tailored to that individual. An additional benefit of this
to aid the engineer in viewing the data at both a strategic and a system is that it helps to manage some of the problems associated
detail level. with data management and data sharing.
Knowledge Sharing One such system is the MCS software package ThruLife, which
Knowledge sharing is key to any long-term project. When an asset is allows operators to extract and investigate the exact status of a
being acquired, the integrity status of the subsea system should be subsea system at a glance, showing evidence of fitness for ongoing
use, which enables planning for repair or replacement. ThruLife was
developed as a result of a high-level survey of the subsea industry in
Integrity management has long
2006 that captured current industry thinking, lessons learned and
been considered in some parts
new data about flexible pipe and steel catenary risers.
of the industry as a required
This next-generation software interrogates all field data relating to
exercise that provides little or no integrity in a single repository, providing an at-a-glance status of
benefit to an operator.
the integrity of key components. It intelligently analyses the data,
assesses changes in integrity status and visually reports back to the
end-user both strategic and detailed information.
given due consideration to enable secure future operation of the
system. This could be achieved through procedural management and Typically, the vast quantity and range of data required in integrity
identifying a responsible person. management resides in separate databases, making cross-
referencing difficult and resulting in considerations being made in
Similarly, it is important to take lessons learned during the operation isolation. ThruLife brings all of these data together to allow a full
of an asset into the design phase of the next project. Often, this may picture of the integrity of all of the subsea components in situ.
require some additional activity in conjunction with suppliers, such
as destructive testing of used subsea components at the end of ThruLife is designed to work with flexible and fixed risers, umbilicals,
service or material analysis to identify whether prediction tools are manifolds, pipelines, trees, controls, valves and mooring systems.
accurate or improvements can be made to subsequent designs.
Summary
In terms of internal knowledge sharing, it is important that Deepwater subsea systems operate in relatively inaccessible
information and knowledge exist within a system and not just within locations. This makes them extremely difficult to inspect, repair and
an individual. In this way a more secure handover can be guaranteed maintain. As a result, operators are increasingly seeing the benefits
during a role handover or change-over in staff. of integrity management systems in terms of optimising inspection
Externally, a number of industry forums exist to promote knowledge-
sharing across operators where new technologies and issues can be
Integrity management systems
discussed. Attendance at these forums helps to gain perspectives
from other operators and companies in the industry. Typically, local have a tendency to look at the
regulatory bodies also run similar events or are keen to provide their
present-day status based on
perspective on current issues in the industry, again increasing
external knowledge.
historical conditions.
Inspection and Monitoring Technology
The use of alternative inspection technologies can offer significant and repair strategies to increase system availability and reduce OPEX
savings in terms of inspection costs, along with additional value from costs. However, in order to achieve this some investment must be
the data themselves. Examples such as topside i-tube deployed cameras made up-front.
can negate the need for ROV work in the riser hangoff area and
provide information in what might otherwise be an inaccessible region. The main problem associated with the delivery of a quality integrity
Similarly, vacuum testing can be used on flexible risers to identify management strategy is not the technical understanding in the
external sheath damage as an alternative to using ROV cameras. industry, but rather a commitment to its implementation.
Software Solutions In summary, an integrity management system cannot simply be
At present, software systems play an important role in integrity considered a collection of procedural and instructional documents. It
management, and their involvement is likely to increase as the data is a ‘live’ tool that enables integrity data to be analysed and
requirements in the subsea industry increase. understood and the status of the system to be determined. ■
142
EXPLORATION & PRODUCTION – OIL & GAS REVIEW 2008 – VOLUME 6 ISSUE II
Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210  |  Page 211  |  Page 212  |  Page 213  |  Page 214  |  Page 215  |  Page 216  |  Page 217  |  Page 218  |  Page 219  |  Page 220  |  Page 221  |  Page 222  |  Page 223  |  Page 224  |  Page 225  |  Page 226  |  Page 227  |  Page 228  |  Page 229  |  Page 230  |  Page 231  |  Page 232  |  Page 233  |  Page 234  |  Page 235  |  Page 236  |  Page 237  |  Page 238  |  Page 239  |  Page 240  |  Page 241  |  Page 242  |  Page 243  |  Page 244  |  Page 245  |  Page 246  |  Page 247  |  Page 248  |  Page 249  |  Page 250  |  Page 251  |  Page 252  |  Page 253  |  Page 254  |  Page 255  |  Page 256  |  Page 257  |  Page 258  |  Page 259  |  Page 260  |  Page 261  |  Page 262  |  Page 263  |  Page 264  |  Page 265  |  Page 266  |  Page 267  |  Page 268  |  Page 269  |  Page 270  |  Page 271  |  Page 272  |  Page 273  |  Page 274  |  Page 275  |  Page 276  |  Page 277  |  Page 278  |  Page 279  |  Page 280  |  Page 281  |  Page 282  |  Page 283  |  Page 284  |  Page 285  |  Page 286  |  Page 287  |  Page 288  |  Page 289  |  Page 290  |  Page 291  |  Page 292  |  Page 293  |  Page 294  |  Page 295  |  Page 296  |  Page 297  |  Page 298  |  Page 299  |  Page 300  |  Page 301  |  Page 302  |  Page 303  |  Page 304  |  Page 305  |  Page 306  |  Page 307  |  Page 308  |  Page 309  |  Page 310  |  Page 311  |  Page 312  |  Page 313  |  Page 314  |  Page 315  |  Page 316  |  Page 317  |  Page 318  |  Page 319  |  Page 320  |  Page 321  |  Page 322  |  Page 323  |  Page 324  |  Page 325  |  Page 326  |  Page 327  |  Page 328  |  Page 329  |  Page 330  |  Page 331  |  Page 332  |  Page 333  |  Page 334  |  Page 335  |  Page 336  |  Page 337  |  Page 338  |  Page 339  |  Page 340  |  Page 341  |  Page 342  |  Page 343  |  Page 344  |  Page 345  |  Page 346  |  Page 347  |  Page 348  |  Page 349  |  Page 350  |  Page 351  |  Page 352  |  Page 353  |  Page 354  |  Page 355  |  Page 356  |  Page 357  |  Page 358  |  Page 359  |  Page 360