Rig: Transocean 712

Name Transocean 712
Owner Caledonia Offshore Drilling 712 Limited
Manager Transocean
Rig Type Semisub
Sub Type Midwater Floater
Jackup Type --
Max Water Depth (ft) 1600
Max Drill Depth (ft) 25000
Dimensions (ft) 295 x 249 x 130
Leg Length (ft) --
Competitive Yes

Current Location

Country --
Region --

Drilling Equipment

Drawworks Type National Oilwell Varco E-3000
Drawworks HP 2500
Mud Pumps Type Continental Emsco FB-1600 Triplex
Top Drive National Oilwell Varco TDS-5H
Hookload Capacity (lbs) 1300000

Rig Construction Details

Rig Design Earl & Wright
Rig Model S711
Year Built 1983
Country of Build South Korea
Yard Name Ulsan Shipyard
Group Yard Name Hyundai Heavy Industries (HHI)

Rig Contract Details

Operating Status Destroyed

Rig Images


15 Sep 2014

Hurricane releases lancaster appraisal well analysis

Hurricane Energy plc (Hurricane), the UK-based oil and gas company focused on hydrocarbon resources in naturally fractured basement reservoirs, has substantially completed post-well data analysis following the successful testing of the 1km horizontal appraisal well 205/21a-6 in Q2 2014 at the Company’s Lancaster oil discovery West of Shetland. The well was optimally located to benefit from a highly connected fault/fracture network and an underlying 300m oil column (Hurricane’s - 2C estimate of field ODT). The results from third party analysis combine to demonstrate a very good quality reservoir which could deliver single well rates of 20,000 STB/d - significantly ahead of initial expectations of well productivity.

9 Jun 2014

'Sedco 712' completes drilling of Lancaster appraisal well

Hurricane is pleased to announce that it has completed the drilling phase of the ongoing operation to drill and test a horizontal appraisal well on its Lancaster discovery, West of Shetland. The well has been drilled to plan and a one kilometre horizontal section through the basement reservoir is now being prepared for testing. The successful execution of this drilling is a very positive stage to have completed successfully. The operation is continuing and preparing for testing that will be carried out over approximately the next 25 days. Commenting from the Transocean’ Sedco 712’ drilling rig, Dr Robert Trice, Chief Executive Officer, said: “I am pleased to report that Hurricane has successfully completed its drilling phase of the reservoir section. The planned operation has gone well and we have succeeded in drilling the one kilometre horizontal section in the fractured basement structure. I am extremely encouraged by the data so far acquired as it indicates that the target fault zones are present and that the encountered section is fractured and oil bearing. Operations have now switched focus to the preparation for the well testing phase of this operation."

28 Apr 2014

Hurricane spuds Lancaster appraisal well

Hurricane Energy Plc (Hurricane) has announced that the Lancaster horizontal appraisal well was successfully spudded on the 26th April 2014 at 10:30BST. Hurricane have contracted Transocean’s ‘Sedco 712’ semisub drilling rig for the drilling operations, which is intended to drill and test the Lancaster basement oil discovery. Drilling activity is expected to last approximately 75 days after which further technical analysis will be undertaken.

16 Apr 2014

Hurricane Energy mobilises 'Sedco 712' for Lancaster appraisal

Hurricane Energy plc, the UK-based oil and gas company focused on hydrocarbon resources in naturally fractured basement reservoirs, is pleased to announce that it has commenced the mobilisation process for the Transocean ‘Sedco 712’ semi-submersible drilling rig. The planned operation is to drill and test the Lancaster basement oil discovery. Well management company SPD Limited has been contracted to provide well construction and project management services during the drilling campaign. The Lancaster discovery was made in 2009 and further tested in 2010. Hurricane's Competent Person's Report, prepared by RPS Energy Consultants Limited in November 2013, allocates 2C recoverable Contingent Resources of 207 MMboe to Lancaster. The discovery is located across blocks 205/21a, 205/22a and 205/26b West of Shetland on Frontier Licence P1368. All assets under the licence are controlled 100% by Hurricane.

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