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Mechanical underground all-in-one blowout preventer

A blowout preventer and mechanical technology, applied in the direction of wellbore/well components, wellbore/well valve devices, earthwork drilling and production, etc., can solve the problems of infeasibility and achieve the effect of simple structure

Inactive Publication Date: 2010-08-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The downhole blowout preventer described above is not feasible in the actual application process because it needs to be equipped with a reliable sound control system in the face of harsh underground conditions or needs to be equipped with inducing devices in severe blowouts

Method used

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  • Mechanical underground all-in-one blowout preventer
  • Mechanical underground all-in-one blowout preventer
  • Mechanical underground all-in-one blowout preventer

Examples

Experimental program
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Embodiment Construction

[0013] As shown in Figure 1, the mechanical downhole integrated blowout preventer includes two parts: the arrow-shaped check valve and the outer annular space packer, and the arrow-shaped check valve and the outer annular space packer pass through the thread between the lower joint 7 Make the connection. The arrow check valve includes check valve body 1, joint body 2, valve core spring 3, valve core 4, valve seat 5 and valve seat nut 6, and the joint body 2 is installed on the step inside the check valve body 1 , the upper part of which is provided with a number of flow channel openings, and a number of evenly distributed flow channel openings are opened in the circumferential direction of the thickened step. The joint body 2 supports the spool, the spring 3 compresses the spool 4, and is close to the valve seat 5. The valve seat 5 is installed on the step in the check valve body 1, and the valve seat is pressed by the valve seat nut 6. The valve seat nut is threaded and Chec...

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Abstract

The invention relates to a mechanical underground all-in-one blowout preventer, which belongs to the well control equipment. The blowout preventer mainly comprises two parts, an arrow-type check valve and an outer annular packer, wherein the arrow-type check valve adopts the principle of one-way conduction of a valve core to realize annular blowout prevention in a drill stem, and the outer annular packer mainly comprises a plastic cylinder, a set shear pin, an unset shear pin, a locking component and the like. When the set shear pin is cut off, an upper jacket compresses the plastic cylinder downwards to realize sealing under the effect of the gravity of the upper drill stem, and simultaneously drilling fluid circulating runner ports arranged on an inner sleeve and the upper jacket are communicated to realize circulation of the drilling fluid. The invention adopts the fully mechanical operating principle, has the advantages of simple and reliable structure and easy realization, and can realize the sealing of the internal and external annular sealing of the underground drill stem, thereby achieving the function of preventing the blowout, improving the handling efficiency of underground accidents, and reducing the well control risk.

Description

technical field [0001] The invention relates to an integrated blowout prevention tool inside and outside a downhole for isolating the inner and outer annular spaces of downhole drill pipes in the process of oil and gas exploration and development, in particular to well control equipment. Background technique [0002] In oil and gas exploration and development, if there is no reliable blowout prevention system, once the formation fluid (oil, gas, water) is out of control, it will lead to out-of-control blowout. Whether it is a blowout inside the drill string or outside the drill string, it may cause damage to drilling equipment, endanger the safety of drilling personnel, destroy oil and gas resources, pollute the natural environment, and lead to serious consequences such as the scrapping of oil and gas wells. At present, in order to realize the internal blowout prevention of the drill string, an internal blowout prevention tool must be connected to the drill string. The widel...

Claims

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Application Information

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IPC IPC(8): E21B33/127E21B34/08
Inventor 王国荣刘清友何霞王云海田野赵敏雷中清
Owner SOUTHWEST PETROLEUM UNIV
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