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A method for rapid pressure blowout of oil and gas wells

A fast technology for oil and gas wells, applied in earthwork drilling, wellbore flushing, wellbore/well components, etc., can solve problems such as unreliability, slow progress, high cost, etc., to ensure reliability, speed, and asset preservation Effect

Active Publication Date: 2016-01-06
刘现华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As shown in the above two oil and gas well blowout accidents, the mud injection technology currently used has serious shortcomings: the top mud injection method often fails and is not reliable; the mud injection method at the bottom of the rescue well is expensive and slow, because drilling It usually takes about three months to rescue the well

Method used

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  • A method for rapid pressure blowout of oil and gas wells

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Comparison scheme
Effect test

Embodiment 1

[0015] Spherical is the preferred solid block shape for pressure blasting and retrieval. It is recommended that the size of the injection ball be less than 30% of the inner diameter of the oil and gas well.

Embodiment 2

[0017] Oil well blowout can use larger size pressure injection ball, as long as the vertical pipe can be safely inserted deeper into the well; natural gas blowout can use smaller size pressure injection ball, because the gas is lighter and needs pressure injection ball in the well The bottom is packed to form a small gap between the balls to prevent the passage of air.

Embodiment 3

[0019] When the blowout is strong at the beginning of blowout, you should use high-density spray balls, then use medium-density spray balls, and then use a large number of low-mass density spray balls. The high-mass density ball can be a steel ball or a steel ball; the medium-mass density ball can be a stone ball or a steel ball; the small-mass density ball can be a rubber or other material ball covered with a steel skin. Steel and other environmentally friendly materials can be used as the cover.

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Abstract

The invention is a fast and reliable pressure spraying and recovery production technology and a corresponding implementation system. This technical invention uses solid blocks to block and suppress blowouts to significantly reduce blowout flow to gain time to repair or replace blowout preventers and other components and connect production pipelines, and then remove part of the solid blocks to restore oil and gas well production. This can minimize environmental pollution and preserve oil and gas well assets. Although solid blocks of any shape can be used, a spherical shape is an optimal shape for press spraying and recovery oil flow operations, so press spray balls are recommended. A pressure spray ball release system consists of a piping system, a blower or pump, a ball feeder and a ball retaining cage. The ball cage is installed on the vertical pipe and sits on the well blowout to store the blowout balls in case they are blown out in the early stage. The balls in the cage will fall back into the well after the blowout flow decreases. A pressure spray ball recovery and recovery production system includes a pipeline system, pumps and pressure spray ball storage tanks.

Description

technical field [0001] The invention belongs to the technical field of emergency response measures for oil and gas well blowout out of control accidents, and in particular relates to a rapid pressure blowout method for oil and gas wells. Such as the August 2009 gas blowout of the Thai oil company Montara in the Timor Sea in Australia and the April 2010 blowout of the British Petroleum Company Macondo oil well in the US Gulf of Mexico have caused huge disasters. Background technique [0002] At present, there are two main technologies to deal with the out-of-control blowout of oil and gas wells. One is the top pressure injection method, that is, the pressure injection mud is pumped from the top of the accident well; the other is the rescue well method, that is, the rescue well is drilled to communicate with the bottom of the accident well and the pressure injection mud is pumped to the bottom of the accident well. Both of these technologies rely on the gravity of the jetting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/12E21B33/10E21B33/02E21B33/13
CPCE21B21/08E21B33/076E21B33/13
Inventor 刘现华
Owner 刘现华
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