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Ice worthy jack-up drilling unit

A self-elevating, ice-type technology, applied in drilling equipment, ice drilling, icebreakers, etc., can solve expensive, large-scale and other problems

Inactive Publication Date: 2013-06-19
CONOCOPHILLIPS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

such gravity-based structures are large and expensive, and are built to withstand ice loads year-round

Method used

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  • Ice worthy jack-up drilling unit
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  • Ice worthy jack-up drilling unit

Examples

Experimental program
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Embodiment Construction

[0022] Turning now to a detailed description of one or more preferred structural arrangements of the present invention, it should be understood that the inventive features and concepts may be embodied in other structural arrangements and that the scope of the present invention is not limited to the embodiments described or illustrated herein. The scope of the present invention is limited only by the scope of the following claims.

[0023] Such as figure 1 As shown, the ice-resistant jack-up rig is generally indicated by arrow 10 . exist figure 1 A medium jack-up rig 10 is shown with its hull 20 floating in the sea and the trusses forming legs 25 in a raised configuration where most of the length of the legs 25 is on the hull 20 Deck 21 extends above. The legs can have a triangular shape or a rectangular shape when viewed from above, the legs comprising long uprights at the corners and a number of cross members connected to the uprights to form a strong and lightweight truss...

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Abstract

The invention relates to an ice worthy jack up rig that may extend the drilling season in shallow water off shore Arctic or ice prone locations. The inventive rig would work like a conventional jack up rig while in open water with the hull jacked up out of the water. However, in the event of ice conditions, the legs are held in place by cans embedded in the sea floor to resist lateral movement of the rig and the hull is lowered into the water into an ice defensive configuration. The hull is specifically shaped with an ice bending surface to bend and break up ice that comes in contact with the hull while in the ice defensive configuration.

Description

technical field [0001] The present invention relates to a mobile offshore drilling unit (offshore drilling unit), often referred to as a "jack-up" drilling unit or rig, for drilling hydrocarbons in shallow water, typically less than 400 feet in depth. Background technique [0002] In the never-ending search for hydrocarbons, many oil and gas reserves have been discovered over the past 150 years. Many techniques have been developed to find new reserves and resources, and many areas of the Earth have been explored in search of new discoveries. Few think that any large, undiscovered resources can be found in populated areas and within easy reach. However, new large-area reserves have been discovered in more challenging and hard-to-reach areas. [0003] One promising area is the Arctic offshore region. However, the Arctic is remote and cold, and the ice on the water poses considerable challenges for both the exploration and production of hydrocarbons. For many years, it was ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B17/00E02B17/02
CPCB63B35/08E02B17/0021E02B17/021E02B2017/0039E02B2017/006E02B2017/0082E21B7/008E21B15/02E02B17/00E02B17/02
Inventor P·G·诺布尔R·S·沙弗尔D·P·贝尔塔
Owner CONOCOPHILLIPS CO