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A safe, environment-friendly and pressure-relieving sealing device

An environmentally friendly and pressure relief technology, applied in wellbore/well valve device, sealing/packing, wellbore/well components, etc. To achieve the effect of reduced operating costs, low operating costs, and convenient use

Active Publication Date: 2021-04-02
大庆金祥寓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the wellhead cap is used to seal the well, the pressure in the well will rise after a period of shutdown, causing the wellhead to hold pressure, and the wellhead cap will not be able to be opened. If a valve is installed on the wellhead cap, the valve will be easily stolen or oil released. Failure to achieve the purpose of sealing the well
When the bridge plug is used to seal the well, operating vehicles and pump trucks are required to run in and open the bridge plug, and the pipe string needs to be lifted, so the operation cost is high and cannot be used repeatedly

Method used

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  • A safe, environment-friendly and pressure-relieving sealing device
  • A safe, environment-friendly and pressure-relieving sealing device

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing:

[0030] Such as figure 1 As shown, the present invention includes a center pipe 1, a slip installation sleeve 2, a slip 3, a cone 5, a rubber sleeve, a setting push sleeve 12 and a piston sleeve 13, a slip installation sleeve 2, a cone 5, a rubber sleeve and The setting push sleeves 12 are all set on the central pipe 1 , and the slips 3 are installed around the central pipe 1 through the slip installation sleeve 2 . The above structure is a common structure in the prior art, and will not be repeated here.

[0031] One of the major innovations of the present invention is that there are four rubber cartridges in total, which are respectively called rubber cartridge A8, rubber cartridge B9, rubber cartridge C10 and rubber cartridge D11, and the four rubber cartridges are arranged in the central tube 1 from top to bottom. The hardness of the rubber tubes on the outer side decr...

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Abstract

The invention provides a safe and environment-friendly capping device with a pressure-relieving function, and relates to the technical field of downhole tools in oil fields. The safe and environment-friendly capping device comprises a central pipe, slip installation sleeves, slips, a cone, rubber sleeves, a setting push sleeve and a piston sleeve, wherein the central pipe is sleeved with the slipinstallation sleeves, the cone, the rubber sleeves and the setting push sleeve, the slips are installed around the central pipe through the slip installation sleeves, the four rubber sleeves A, B, C and D are arranged on the outer side of the central pipe from top to bottom in sequence, the hardness of the rubber sleeves is reduced from top to bottom in sequence, and the two adjacent rubber sleeves are spaced with partition plates. When the four rubber sleeves with different hardness are arranged, and the four rubber sleeves are arranged from top to bottom in sequence in the order from high hardness to low hardness, during setting of the rubber sleeves, it is only required that the lowest rubber sleeve D with the lowest hardness is set, so that very low setting pressure is required, no large devices are employed during setting, and the operation cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of oil field downhole tools, and in particular relates to a safe, environment-friendly and pressure-releasing well sealing device. Background technique [0002] In the existing well sealing technology, the well sealing technology using the wellhead cap and the lower bridge plug is adopted. When the wellhead cap is used to seal the well, the pressure in the well will rise after a period of shutdown, causing the wellhead to hold pressure, and the wellhead cap will not be able to be opened. If a valve is installed on the wellhead cap, the valve is easy to be stolen or oil is released. The purpose of sealing the well cannot be achieved. When the bridge plug is used to seal the well, operating vehicles and pump trucks are required to run in and open the bridge plug, and the pipe string needs to be lifted, so the operation cost is very high, and it cannot be used repeatedly. [0003] Therefore, it is necessary t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127E21B34/06
CPCE21B33/127E21B34/06
Inventor 禹栽星李长青谢冀江黄国全宋波张国杰徐文超
Owner 大庆金祥寓科技有限公司
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