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Offshore casing surge compensation dual-drive three-layer casing drilling and coring device

A coring device and dual-drive technology, which is applied in the extraction of undisturbed core devices, casings, drill pipes, etc., can solve problems such as immaturity, and achieve the effects of simple and reliable device, strong operability and high efficiency.

Pending Publication Date: 2022-01-11
GUANGZHOU MARINE GEOLOGICAL SURVEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic core drilling technology for land is relatively mature, but for water drilling, especially ocean core drilling technology is still immature, and there is no safe and applicable deep water drilling water platform and safe and reliable deep water casing uprighting and casing. Anti-displacement system device of the top relative to the working platform

Method used

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  • Offshore casing surge compensation dual-drive three-layer casing drilling and coring device
  • Offshore casing surge compensation dual-drive three-layer casing drilling and coring device
  • Offshore casing surge compensation dual-drive three-layer casing drilling and coring device

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Embodiment

[0033] Such as figure 1 As shown, an offshore casing surge compensation dual-drive three-layer casing drilling and coring device in this embodiment mainly includes a drilling ship 7 and a drilling tool system arranged on the drilling ship 7, an outer casing drilling system, an inner Casing and drill pipe drilling systems and mud circulation systems.

[0034] The drilling ship 7 includes a dynamic positioning system, and when the dynamic positioning is turned on, the wellhead position can be positioned at the specified coordinates. The deck of the drilling ship 7 is provided with a moon pool 10 and a tower (not shown in the figure), the top of the moon pool 10 is provided with a moon pool cover 8, and the center of the moon pool cover 8 is provided with a pneumatic slip 9. A liftable subsea base plate 12 is suspended.

[0035] The pneumatic slip 9 is a wedge connected to the pneumatic piston, which can move the outer casing up and down when opened, and can clamp the outer cas...

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Abstract

The invention discloses an offshore casing surge compensation dual-drive three-layer casing drilling and coring device. The device comprises a drilling ship with a dynamic positioning system, a drilling tool system, an outer casing drilling system, an inner sleeve and drill rod drilling system and a mud circulating system; the drilling tool system comprises an outer sleeve, an inner sleeve, a drilling rod and a surge compensator; the outer casing drilling system comprises a traveling block mounted on the tower, a top drive mounted on the traveling block and a hydraulic elevator mounted on the top drive; the inner sleeve and drill rod drilling system comprises a vertical shaft type drilling machine and a winch; and the mud circulating system comprises a mud recycling pool, a mud filter, a mud pool and a mud pump which are installed on a deck. The drilling and coring device has the advantages of being high in drilling efficiency, high in coring rate, simple in equipment, high in reliability, low in cost and the like, and is not only suitable for general sedimentary rock stratum shallow drilling, but also suitable for stratums difficult to core, such as reef limestone stratums and sandy soil stratums.

Description

technical field [0001] The invention relates to the technical field of marine drilling, in particular to a marine shallow drilling coring device with dynamic positioning of a ship, double drilling drive heads, wellhead surge compensation with an outer casing, and heave compensation for casing drilling. Background technique [0002] Offshore core drilling is different from land drilling, with strong winds and waves, complex sea bottom, and difficult core drilling. Casing wall protection is usually required. At present, the domestic core drilling technology for land is relatively mature, but for water drilling, especially ocean core drilling technology is still immature, and there is no safe and applicable deep water drilling water platform and safe and reliable deep water casing uprighting and casing. The anti-displacement system device of the top relative to the working platform. Contents of the invention [0003] The object of the present invention is to overcome the def...

Claims

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Application Information

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IPC IPC(8): E21B25/18E21B17/00E21B21/00E21B41/00
CPCE21B25/18E21B21/001E21B41/0007E21B17/00
Inventor 李占钊杨楠郭武田烈余
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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