A soluble metal sealing fracturing bridge plug

A metal sealing and fracturing technology, which is applied in sealing/isolation, wellbore/well components, production fluids, etc., can solve the problem of poor temperature resistance and pressure resistance of soluble rubber barrel seals and inability to mass-produce soluble bridge plugs Application, complex structure of soluble bridge plugs, etc., to achieve uniform force, reduce the risk of problems, and uniform deformation

Active Publication Date: 2021-09-21
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the seals of soluble bridge plug tools developed by oil service companies at home and abroad are all made of rubber. The temperature resistance and pressure resistance of soluble rubber barrel seals are poor. The structure of the bridge plug is complex and the probability of failure is high, so the soluble bridge plug cannot be applied in large quantities at present

Method used

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  • A soluble metal sealing fracturing bridge plug
  • A soluble metal sealing fracturing bridge plug
  • A soluble metal sealing fracturing bridge plug

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and example, the present invention will be further described:

[0028] In the following description, when referring to the description of the working mode, the end close to the bottom of the well is the lower end, and the end close to the wellhead is the upper end. When it comes to the description of the structure of the bridge plug, the upper end is the direction in which the central support shaft 1 guides the circular table 11 , and the lower end is the direction of the sector-shaped insert rod 12 of the central supporting shaft 1 .

[0029] like Figure 1-Figure 8 As shown, a soluble metal sealing fracturing bridge plug of the present invention includes a central support shaft 1, a metal sealing sleeve 2, a wedge body 3, a safety pin 4, a slip assembly 5, a setting joint 6 and a locking ring 7, The central support shaft 1 is located at the uppermost part of the whole set of devices. The central support shaft 1 is made o...

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Abstract

The invention belongs to the technical field of oil and gas field development, and in particular relates to a soluble metal sealing fracturing bridge plug. It includes a central support shaft, a metal sealing sleeve, a wedge body, a safety pin, a slip assembly, a setting joint and a locking ring, and the central support shaft, a metal sealing sleeve, a wedge body, a slip assembly and a locking ring are installed sequentially from top to bottom. For setting joints, the locking ring is installed at the one-way locking thread on the surface of the cylindrical block of the setting joint. The invention can realize full-diameter production after the fracturing operation is completed, the deformation of the metal sealing sleeve is uniform, and the contact stress between the metal sealing sleeve and the casing of the bridge plug after setting is increased, so that the sealing is reliable, not easy to fail, and the dissolved products will not Blocking the wellbore can prevent the premature setting of the bridge plug due to obstruction during the process of running into the well. After the bridge plug is set, it will not be unsealed in advance. The overall structure is simple and the number of parts is small, which reduces the chance of problems in the downhole operation of the bridge plug. risk.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a soluble metal sealing fracturing bridge plug. Background technique [0002] Bridge plugs are downhole tools used to temporarily isolate the wellbore in the staged fracturing technology of horizontal wells. According to the different ways of unsealing, bridge plugs can be divided into removable bridge plugs, drillable bridge plugs and soluble bridge plugs. The salvage cost of the salvageable bridge plug is high, and the risk of failure is high; when the amount of debris generated by the drillable bridge plug during drilling and milling is large, it will accumulate and block the casing, which will have adverse effects on subsequent operations; the soluble bridge plug is made of magnesium and aluminum alloys. A new type of bridge plug, which can dissolve in a certain liquid environment after the completion of the fracturing operation, so as to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134E21B43/26
CPCE21B33/134E21B43/26
Inventor 熊伟刘瑛刘恩洋赵严于思荣
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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