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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <link>https://trid.trb.org/</link>
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    <item>
      <title>CONCEPTUAL DESIGN OF A TURRET-MOORED PRODUCTION SYSTEM (TUMOPS)</title>
      <link>https://trid.trb.org/View/439962</link>
      <description><![CDATA[A project was initiated in 1987 to develop the Turret Moored Production System (TUMOPS) concept for:  1) developing offshore fields in remote locations where in-field storage with shuttle tanker export is required, 2) early/phased developments, 3) short-term field developments, where relocation is possible. During the first phase of the project, alternate configurations for the system with varying water depths, number of wells, storage capacities, and drilling/workover facilities were investigated.  This paper describes the second phase of the project which focused on further defining key system components, including the subsea system, the turret and fluid transfer systems, and the combination mooring/thruster stationkeeping system, for one set of field parameters; and culminated in the development of a conceptual design for an example field offshore Norway.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/439962</guid>
    </item>
    <item>
      <title>ANALYSIS AND DESIGN OF ANTI-RECOIL SYSTEM FOR EMERGENCY DISCONNECT OF A DEEPWATER RISER: CASE STUDY</title>
      <link>https://trid.trb.org/View/441771</link>
      <description><![CDATA[Emergency disconnect of the drilling riser is required when a dynamically positioned deepwater floater has either a driftoff or a driveoff.  This cannot be anticipated; therefore, the riser tension setting cannot be adjusted to a preferred value.  Hence, following emergency disconnect, highly tensioned risers have been known to accelerate into the diverter housing and lift the rotary table several feet.  This paper describes an analysis method for quantifying this problem and how the method was applied to design an anti-recoil system for Sonat's Discoverer 534 Drillship.  The ship was being upgraded to operate in 6000 feet of water.  The analysis method described was compared to results of a full scale disconnect test in 3700 ft of water.  The comparison of analysis to test results was very good.  See also the following abstract.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/441771</guid>
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    <item>
      <title>COMPARISON OF ANALYSIS AND FULL-SCALE TESTING OF ANTI-RECOIL SYSTEM FOR EMERGENCY DISCONNECT OF DEEPWATER RISER</title>
      <link>https://trid.trb.org/View/441772</link>
      <description><![CDATA[This paper describes the verification of a procedure for analysing the emergency disconnect of deepwater drilling risers. The procedure was used to design an anti-recoil system for Sonat's Discoverer 534 drillship.  The purpose of this system is to provide control of the riser's ascent velocity and hence to limit its impact with the diverter housing.  The system was tested during an actual disconnect in 3700 feet of water.  This test was full scale and instrumented to provide riser displacement and pressure drop across the anti-recoil valves in some of the tensioners.  The data was used to verify the analysis and design procedure.  See also the previous abstract.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/441772</guid>
    </item>
    <item>
      <title>RISER ANGLE POSITIONING SYSTEM (RAPS)</title>
      <link>https://trid.trb.org/View/167242</link>
      <description><![CDATA[A system has been developed to provide adequate position reference backup for a dynamically positioned vessel's primary position reference.  This system employs two or more riser angle indicators, one located at the top and one at the bottom of the riser with any additional sensors located at intermediate points along the riser.]]></description>
      <pubDate>Thu, 21 May 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/167242</guid>
    </item>
    <item>
      <title>USE OF SPECTRAL TECHNIQUES FOR OPERATIONALLY FORECASTING VESSEL MOTIONS</title>
      <link>https://trid.trb.org/View/160059</link>
      <description><![CDATA[An offshore operator's problem with planning upcoming work can be viewed as being threefold: (1) to predict properly wave conditions in advance of occurrence, (2) to estimate the resulting vessel motions induced by the forecast waves, and (3) to evaluate what effects these motions will have on scheduled work.  A computerized system is discussed that permits at-sea managers to anticipate best modes of operation in advance and thereby schedule accordingly.  This approach employs spectral techniques to forecast motions of vessels induced by the seaway.  Use of this system has permitted tighter operational control of semisubmersibles, drillships, and barges.]]></description>
      <pubDate>Wed, 19 Nov 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/160059</guid>
    </item>
    <item>
      <title>ARCTIC DRILL BARGE PROPOSED FOR BEAUFORT SEA</title>
      <link>https://trid.trb.org/View/154955</link>
      <description><![CDATA[The Arctic Drill Barge (ADB), a new concept which is designed specifically for shallow-water arctic areas, is described.  The slope-sided, heated hull is designed to take all expected ice loads within the barrier islands.  The ADB is an attractive alternative to other methods such as gravel islands because of its mobility, ease of restoring the site to its original condition, and less expense when used for several wells.]]></description>
      <pubDate>Wed, 08 Oct 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/154955</guid>
    </item>
    <item>
      <title>GLOMAR EXPLORER AS A DEEP OCEAN DRILLING AND CORING SHIP</title>
      <link>https://trid.trb.org/View/153732</link>
      <description><![CDATA[A study was conducted to determine the feasibility of utilizing the GLOMAR EXPLORER for deep water scientific drilling and coring.  The large physical size, the massive load handling capability and the large center well of the GLOMAR EXPLORER allow a great deal of flexibility for the incorporation of riser and BOP handling and storage, drilling equipment, laboratory and shop spaces, bulk storage and crew accommodations.  Of particular interest is the proposed incorporation of a riser which does not need flotation since the bare riser weight can be supported, raised and lowered from the ship's existing gimbal and heave compensated rig floor.  This capability simplifies and improves the safety of overall riser handling and support.]]></description>
      <pubDate>Mon, 09 Jun 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/153732</guid>
    </item>
    <item>
      <title>ICEGOING DRILLSHIPS</title>
      <link>https://trid.trb.org/View/147060</link>
      <description><![CDATA[Rauma-Repola Oy is to build the world's first dynamically positioned icegoing drillships to a Dutch design for a Soviet customer.  As part of the design criteria, it was laid down that the environment should not prohibit operation within certain limits.  The ship should be capable of working in iceberg areas, or tropical seas and should be able to maintain station in winds of 45 kt, gusting to 65 kt; current velocities up to 2 kt, and a mean wave height of 4.5 m (significant) and mean wave period of 12s.  The vessels are propelled by two controllable pitch propellers running at constant speed.  Three drillships will be built for the Soviet Union based on the Pelican design of the Dutch firm IHC-Gusto and adapted to specific customer requirements for operation in Arctic conditions.  They will be built to ice class UL1, the first drilling units to have this specification, which will enable them to operate independently in ice sludge and to work in solid ice when towed by an icebreaker.  Drilling will be possible in depths of up to 600 m and in temperatures down to -40 deg C.  Main dimensions for the Pelican class are: Length 149.4m, Beam 24.0m, Speed 13 knots, Deadweight 7000 tonnes, Depth to main deck 12.5 m, Maximum draught 12.5 m.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/147060</guid>
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    <item>
      <title>BIG S.E. ASIA PLATFORM TENDER CONVERTED FROM DRILLSHIP</title>
      <link>https://trid.trb.org/View/91561</link>
      <description><![CDATA[Conversion by Brinkerhoff Maritime Drilling Pte.  Ltd.  of a drillship into Southeast Asia's biggest platform tender is briefly described here.  Brinkerhoff II, the new-design tender commissioned October 1978 in Singapore, is a conversion from the former drilling Glomar IV.  Its design allows the platform to continue circulating and tripping even if the tender is forced to disconnect.  The rig is drilling for Conoco Indonesia in 300 ft of water.]]></description>
      <pubDate>Wed, 15 Aug 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/91561</guid>
    </item>
    <item>
      <title>PERFORMANCE PREDICTION OF FLOATING DRILLING VESSELS FOR VARIOUS OPERATING AREAS</title>
      <link>https://trid.trb.org/View/86987</link>
      <description><![CDATA[This paper describes a computer program, composed of weather and drilling models, that was developed to help select floating drilling vessels for specific operating areas and start-up times.  With these models, expected performance of different vessels can be simulated and their costs compared. Brief discussions are given on the types of information needed and the concepts used in these models.]]></description>
      <pubDate>Sat, 30 Jun 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/86987</guid>
    </item>
    <item>
      <title>MODIFIED VESSELS SHOW PROMISE FOR ARCTIC OFFSHORE WORK</title>
      <link>https://trid.trb.org/View/79153</link>
      <description><![CDATA[Powerful new icebreaking vessels that are planned for exploration and drilling operations in the United States and Canadian Arctic offshore areas are highlighted.  These vessels will be designed to icebreaker standards equivalent to between Arctic Class 6 and 10, allowing operations to proceed for part or all of the winter season.  Modifications to high-powered Arctic-class vessels will extend their capabilities beyond that solely of exploration support, creating the primary use for these vessels in drilling.]]></description>
      <pubDate>Wed, 27 Sep 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/79153</guid>
    </item>
    <item>
      <title>DEEPWATER MOORING TECHNOLOGY</title>
      <link>https://trid.trb.org/View/79154</link>
      <description><![CDATA[The author defines deep water moorings for drillships, briefly examines the constraints of mooring systems, and describes various types of mooring and equipment used. Analysis methods for mooring systems are also covered, with particular reference to catenary, static and dynamic analyses.]]></description>
      <pubDate>Wed, 27 Sep 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/79154</guid>
    </item>
    <item>
      <title>SHIP MOTION-COMPENSATION SYSTEMS</title>
      <link>https://trid.trb.org/View/71554</link>
      <description><![CDATA[Drilling from a structure subject to wave motion raises problems of motion compensation.  In recent years these have become more acute as the offshore petroleum industry exploits the hydrocarbon resources located in more difficult areas.  Of the many problems introduced by movement of the platform, two are discussed here: the isolation of the drill-string from the heave motion of the platform and the tensioning of the marine riser.  Principles of operation and constructional aspects of compensation systems are discussed.]]></description>
      <pubDate>Sun, 27 Aug 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/71554</guid>
    </item>
    <item>
      <title>ROUGH WEATHER DRILLING VESSEL SIMULATION</title>
      <link>https://trid.trb.org/View/74225</link>
      <description><![CDATA[Selecting an optimum rig design is not easy, given the many different designs proposed for rough-weather areas, but the task has been simplified by a drilling vessel simulator that calculates down time and pinpoints operations sensitive to weather-caused interruptions.  Two interacting parts simulate offshore drilling operations and weather interference.  While the operational model "drills" a well, the weather model generates wave heights and periods that determine vessel motions which are checked against operating limits.  The weather model simulates both wave height and period, whereas previous simulators generate only wave height.]]></description>
      <pubDate>Sun, 27 Aug 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/74225</guid>
    </item>
    <item>
      <title>MOTION SUPPRESSION FOR FLOATING RIGS</title>
      <link>https://trid.trb.org/View/74226</link>
      <description><![CDATA[The authors describe a nonresonant, passive roll and/or pitch suppression system for floating rigs, which is designed to function at all wave periods and under any vessel loading condition.  The system does not depend on transferring water from one side of the vessel to the other, but uses compressed air and ballast tanks open at the bottom.  Prototype systems are being installed on three drilling barges, and the system has been successfully tested on a jackup model.]]></description>
      <pubDate>Sat, 19 Aug 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/74226</guid>
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