| Qingdao Institute of marine geology, China Geological Survey | Host |
| Citation: |
XIONG Liang, XIE Wenwei, YU Yanjiang, YU Haoyu. KEY TECHNOLOGY OF DRILL IN CASING IN OCEAN DRILLING[J]. Marine Geology Frontiers, 2021, 37(3): 74-80. doi: 10.16028/j.1009-2722.2020.053
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KEY TECHNOLOGY OF DRILL IN CASING IN OCEAN DRILLING
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Abstract
Ocean drilling usually adopts open-circuit drilling without riser, and the main wall protection method is casing. The conventional casing running method has complicated operating procedures and long construction time. The casing is often not in place due to bore shrinkage and collapse, which brings great challenges to the construction. In this paper, the key technology of drill in casing in Ocean Drilling Program is sorted out in detail. This technology uses special supporting tools to realize the “combination of drilling and casing running procedures”, which simplifies the operating procedures and significantly reduces the construction period and solves the technical problems such as the difficulty and high risk of casing running in complex formations by open-circuit drilling in ocean drilling, and provides safety guarantee for deep coring in ocean drilling.
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References
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XIONG Liang, XIE Wenwei, YU Yanjiang, YU Haoyu. KEY TECHNOLOGY OF DRILL IN CASING IN OCEAN DRILLING[J]. Marine Geology Frontiers, 2021, 37(3): 74-80. doi: 10.16028/j.1009-2722.2020.053
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Figure 1.
Schematic diagram of the jetting method into the surface conductor
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Figure 2.
Schematic diagram of the drill in casing
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Figure 3.
Schematic diagram of the hydraulic underreamer
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Figure 4.
Bi-center reamer
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Figure 5.
Schematic diagram of the mud motor with a bi-center reamer and pilot bit
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Figure 6.
SDS water hammer
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Figure 7.
Schematic diagram of water hammer drill-in casing system
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Figure 8.
Casing running tool
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Figure 9.
Hole U1500B reentry system and casing