Fracturing bridge plug

A fracturing plug and fracturing ball technology, applied in the field of fracturing bridge plugs, can solve the problems of long milling time, difficult flowback, long sealing time, etc., and achieve the effect of saving milling time and improving milling efficiency

Active Publication Date: 2013-04-17
四机赛瓦石油钻采设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although conventional fracturing bridge plugs have good sealing performance, high pressure difference resistance, and long sealing time, they can also be ground and milled, but they are prone to midway seat sealing during grinding and milling, and the milling time is long, and the metal debris after milling Large specificity and difficult flowback, so it cannot be applied to staged fracturing of horizontal wells
[0004] Although ordinary non-metallic drillable bridge plugs can solve the ...

Method used

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] This embodiment provides a fracturing plug, such as figure 1 As shown, it includes fracturing ball 1, central tube 2, shear pin 3, upper slip 7, lower slip 7, slip ring 6, cone 8, end rubber cylinder 10, middle rubber cylinder 11 and guide shoe 14 , wherein, the outer diameter of the central tube 2 has a variable diameter step, the maximum outer diameter 19 places are provided with evenly distributed holes suitable for the shear pin 3, the central tube 2 is a radial hollow structure with an inner diameter; the upper end of the central tube 2 has a The fracturing ball cavity with the same inner diameter of the central tube 2, the fracturing ball 1 is placed in the fracturing ball cavity; the inner diameter of the central tube 2 and the fracturing ball cavity has an internal thread 20, which is convenient and fast for the fracturing bridge plug Co...

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Abstract

The invention relates to the technical field of unconventional gas pool multi-stage fracturing and particularly relate to a fracturing bridge plug. The bridge plug is used for multi-stage fracturing modification of casing horizontal wells and has the quick removing performance. The bridge plug comprises a fracturing ball, a central tube, a shear pin, a slip, a slip ring, a tapered body, an end rubber sleeve, a middle rubber sleeve and a guiding shoe. The bridge plug is simple in structure and capable of saving the drilling time of every bridge plug of the horizontal well multi-stage fracturing greatly and meeting the low cost requirement and the environment-friendly requirement of exploration and development of low-permeability unconventional oil gas of China.

Description

technical field [0001] The invention relates to the technical field of multistage fracturing of unconventional gas reservoirs, in particular to a fracturing bridge plug used for staged fracturing reconstruction of casing horizontal wells and having rapid drilling and removal performance. Background technique [0002] Bridge plugs have been used for many years. Traditional bridge plugs are made of metal and run into the well through cables or tubing. In horizontal wells, ordinary bridge plugs cannot be lowered to the predetermined position through cables. Therefore, it is necessary to design a composite fracturing bridge plug that is resistant to high temperature and high pressure, has excellent milling performance, and can pump the bridge plug to the predetermined position through surface pumping. [0003] Although conventional fracturing bridge plugs have good sealing performance, high pressure difference resistance, and long sealing time, they can also be ground and milled...

Claims

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Application Information

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IPC IPC(8): E21B33/134
Inventor 邹刚李一村肖庆玲赵俊峰宁祎潘南林
Owner 四机赛瓦石油钻采设备有限公司
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