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Method for fighting an oilspill in the aftermath of an underwater oil well blowout and installation for carrying out the method

An oil well, crude oil technology

Inactive Publication Date: 2013-05-01
阿德里安·卡吉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, subsurface flow and subsurface waves pose serious problems for this solution, as does freezing of the valves due to low temperatures

Method used

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  • Method for fighting an oilspill in the aftermath of an underwater oil well blowout and installation for carrying out the method
  • Method for fighting an oilspill in the aftermath of an underwater oil well blowout and installation for carrying out the method
  • Method for fighting an oilspill in the aftermath of an underwater oil well blowout and installation for carrying out the method

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Embodiment Construction

[0019] The method of the invention is not only applicable to leaking pipelines on the seabed level, but also suitable for the situation that crude oil leaks from the seabed through cracks or crude oil is ejected from natural channels due to broken pipelines under the seabed. This method utilizes the static pressure difference between the static pressure of the seabed and the reduced pressure formed in the cavity of the seabed where fluid is drawn out. If crude oil and water were pumped out of the aforementioned artificially created cavity on the ocean floor at a pressure drop of only 50 kPa (0.5 bar), the pressure outside the cavity would be 50 kN / m².

[0020] In order to carry out the method of the invention, the support structure or bearing support with reinforced metal foil is a key component of the device for carrying out the method. exist figure 1 The device as a whole is shown in . The support structure 4 is a steel structure in the form of a three-legged pyramid-shape...

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Abstract

The method for pumping away the oil in the aftermath of a blow out in an offshore oil well, comprises the steps of.putting a support structure (4) with surrounding foil (1) over the leaking oil well or pipe (26), in order to create a hollow space overhead the leaking spot on the sea bottom (10), 2.pumping water and oil through the top of the support structure (4) and thereby creating an underpressure below the foil (1) so the foil (1) will be pressed onto the sea bottomdue to hydrostatic pressure of the outside water; 3.continuously pumping away the liquid below the foil (1) from within the support structure (4) until it is pure crude oil,and collecting the same.; The installation comprises a support structure (4) with an enclosure (12), in order to provide a hollow room overhead a leaking spot or oil pipe (26), and a reinforced foil (1) having such size that it extends at least 10 meters into the surrounding of the support structure (4). The reinforced foil (1) is tightly attached to the lower edge (33) of the enclosure (12) of the support structure (4). At least one pumping pipe (6,7) connectable to the top of the support structure (4) in order to pump liquid from within the support structure (4) and lower side of the foil (1).

Description

technical field [0001] The invention relates to a method for treating floating oil after a blowout occurs in an underwater oil well, and also relates to a device for realizing the method. Blowout generally refers to the uncontrollable leakage of crude oil, natural gas, or a mixture of the two from a well after a pressure control system fails. When a blowout occurs, formation fluids begin to rush into the wellbore, rise up the annulus and / or flow into the drill pipe, a phenomenon commonly referred to as a kick. If the well is not shut in (the general term for closing the blowout preventer valve), the kick can quickly escalate into a blowout when the fluid reaches the surface. Especially when the fluid is gas that can spread rapidly when rising to the wellbore, the effective weight of the fluid will be further reduced and the diffusion speed of the fluid will be accelerated to near the speed of sound. During a blowout, gas and other hydrocarbons are usually ignited, creating a...

Claims

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Application Information

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IPC IPC(8): E21B43/01
CPCE21B43/0122E21B33/06E21B43/01E21B43/12
Inventor 阿德里安·卡吉
Owner 阿德里安·卡吉