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Offshore drilling system

A drilling fluid and wellbore technology, used in drilling equipment, underwater drilling, drilling pipes, etc., can solve problems such as increased cost and weight

Inactive Publication Date: 2015-01-07
BP CORP NORTH AMERICA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These added costs are compounded by the extra time required to meet the challenges of operating in deepwater environments and making up and breaking out of tubing during, for example, conventional drilling operations

Method used

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  • Offshore drilling system
  • Offshore drilling system
  • Offshore drilling system

Examples

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Embodiment Construction

[0064] It should be understood that the following disclosure provides many different embodiments or examples for implementing different features of various embodiments of the present invention. Specific examples of components and arrangements will be described below to simplify the present disclosure. Of course, these are just examples and not intended to be limiting. In addition, the present disclosure may repeat reference numerals and / or letters in various examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or configurations discussed.

[0065] As used herein, the terms "upper" and "lower", "upper" and "lower", "top" and "bottom", and other similar terms indicating the relative position of a given point or element are used in an attempt to make it clearer Describe some elements. As used herein, the term "tubular" can refer to any type of tube, unless explicitly stated ot...

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Abstract

According to one or more aspects of the invention, a method for drilling an offshore wellbore into a seabed from a platform positioned proximate to the water surface comprises making-up a first tubular string with a first conveyance assembly and running the first tubular string into the wellbore with the first conveyance assembly, wherein the first tubular string enters the wellbore from the water column at an entry position proximate to the seabed; performing a wellbore task with the first tubular string; while the wellbore task is being performed with the first tubular string, making-up a second tubular string in the water column from a second conveyance assembly; withdrawing the first tubular string from the wellbore with the first conveyance assembly once the wellbore task is completed; and running the second tubular string with the second conveyance assembly into the wellbore at the entry point from the water column.

Description

[0001] Related patent applications [0002] This patent application claims the benefits of U.S. Provisional Patent Application No. 61 / 228,094 filed on July 23, 2009. Background technique [0003] This section provides background information to facilitate a better understanding of various aspects of the present invention. It should be understood that the statements in this part of the disclosure are to be read based on this, rather than being admitted as prior art. [0004] A large number of oil and gas reservoirs have been discovered and will continue to be discovered under various water bodies around the world. In the past, technology limited offshore drilling and production to relatively shallow areas of the coastline, where water depths ranged from a few feet to a few hundred feet. Currently, the industry has conducted drilling operations at water depths above 10,000 feet, and it is expected that these operations can continue to be advanced to even deeper waters. [0005] Wheneve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B15/02E21B19/00E21B7/12
CPCE21B21/001E21B21/08E21B7/12E21B15/02E21B19/002C07D487/04C07D453/04C07D471/22C07D519/00Y02A50/30A61K31/519A61K31/5377C07D453/02C07D498/22
Inventor 迈克尔·L·佩恩
Owner BP CORP NORTH AMERICA INC