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Mechanical expansion type leaking stoppage tool and leaking stoppage method thereof

A plugging method and tool technology, applied in the field of oil drilling, can solve the problems of difficulty, failure of plugging operations, and high cost, and achieve the effects of reducing the risk of plugging, improving plugging efficiency, and high pressure bearing capacity.

Active Publication Date: 2021-05-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For open large cracks and cave-type leakage, because the particles of the plugging material are much smaller than the size of the cracks and caves, the plugging cement cannot be retained, resulting in the loss of the plugging material and the failure of the plugging operation
Although the plugging technology of expansion pipe can be used for plugging in karst caves, it has not been widely used due to the high cost, difficulty and slow speed of reaming operations.

Method used

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  • Mechanical expansion type leaking stoppage tool and leaking stoppage method thereof
  • Mechanical expansion type leaking stoppage tool and leaking stoppage method thereof
  • Mechanical expansion type leaking stoppage tool and leaking stoppage method thereof

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Embodiment Construction

[0043] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

[0044] The inventor noticed during the invention that when drilling into fractures and karst caves in the formation during oil drilling, for open large fractures and karst caves, the particle size of the plugging material is much smaller than the size of the cracks and karst caves, so it cannot The plugging cement is retained, resulting in the loss of plugging material, resulting in the failure of the plugging operation.

[0045] In view of the above deficien...

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Abstract

The invention provides a mechanical expansion type leaking stoppage tool and a construction method thereof. The leaking stoppage tool comprises a feeding pipe column, a compressing and expanding mechanism, a special-shaped section bridge frame, a releasing mechanism and a bridge accessory, wherein the upper end of the compressing and expanding mechanism is connected to the feeding pipe column, the special-shaped section bridge frame is connected with the feeding pipe column and arranged outside the compression expansion mechanism, the bridge frame forms plastic deformation under the outward expansion of the compressing and expanding mechanism, the releasing mechanism is connected to the lower end of the compressing and expanding mechanism, located in the bridge frame and used for separating connection of the expanded feeding pipe column, the compressing and expanding mechanism and the bridge frame, the bridge accessory is connected to the lower portion of the bridge to assist the bridge in intercepting the leaking stoppage material, and the releasing mechanism is at least partially connected into the bridge accessory. According to the leaking stoppage tool, a supporting structure is formed in the karst cave through the bridge frame, and then a hole can be plugged by using the plugging material, so that the plugging operation of karst cave type leakage is realized.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and mainly relates to a mechanical expansion plugging tool and a construction method thereof. Background technique [0002] During oil drilling, fractures and caves in formations are often encountered. Due to the pressure difference, the drilling fluid will be lost along the fractures and caves. When the pressure of the drilling fluid column cannot balance the formation pressure, serious accidents such as well collapse, well kick, and blowout will occur, making drilling impossible. Therefore, plugging must be carried out to prevent the loss of drilling fluid. [0003] For fracture-type leakage, the conventional plugging technology realizes the plugging of fractures and cavities by filling the fractures with materials with larger particles. For large open cracks and caverns, since the particles of the plugging material are much smaller than the size of the cracks and caves, the plugg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 程光明赵晨熙赵建军尹慧博谷磊胡亮
Owner CHINA PETROLEUM & CHEM CORP
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