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Fracturing pipe pup joint and fracturing string including same

A technology for fracturing pipe strings and short joints, applied in the field of fracturing pipe strings, can solve problems such as affecting the running operation of other tools, inability, and difficulty in full bore.

Active Publication Date: 2019-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sliding sleeves in the prior art often need to use balls or special opening tools to assist in the opening action, and it is impossible or difficult to realize functions such as full bore, thereby affecting the lowering operation of other tools in the later stage

Method used

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  • Fracturing pipe pup joint and fracturing string including same
  • Fracturing pipe pup joint and fracturing string including same
  • Fracturing pipe pup joint and fracturing string including same

Examples

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing.

[0033] figure 1 A frac sub 100 according to the present invention is shown. like figure 1 As shown, the fracturing sub 100 includes an outer cylinder 13 and an inner cylinder 14 . Wherein, a fracturing hole 22 communicating with the inside and the outside is configured on the wall of the outer cylinder 13 for fracturing operations. The inner cylinder 14 is disposed in the inner cavity of the outer cylinder 13 . In the initial state, the inner cylinder 14 is fixedly connected with the outer cylinder 13 and seals the fracturing hole 22 . When the pressure fluid is injected into the inner cavity of the inner cylinder 14, the inner cylinder 14 is forced downward by the resultant force of the pressure fluid to push the inner cylinder 14 to move down corresponding to the outer cylinder 13 and expose the fracturing hole 22, as image 3 shown. The fracturing sub 100 utilizes ...

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PUM

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Abstract

The invention provides a fracturing pipe pup joint and a fracturing string including the same. The fracturing pipe pup joint comprises an outer tube and an inner tube arranged in an inner cavity of the outer tube. Fracturing holes are constructed in the wall of the outer tube. Under an initial state, the inner tube and the outer tube are fixedly connected and block the fracturing holes. When pressure liquid is injected into an inner cavity of the inner tube, the inner tube is under resultant force of the pressure liquid to be actuated to move downwards to be exposed out of the fracturing holes. The fracturing string with the fracturing pipe pup joint can achieve full bore perforating easily.

Description

technical field [0001] The invention relates to the technical field of downhole tools for oil and gas wells, in particular to a fracturing nipple and a fracturing pipe string containing it. Background technique [0002] Multi-stage fracturing sub-section fracturing technology is a new well completion technology that has developed rapidly in the field of oil and gas well engineering technology in recent years. As an important means of unconventional oil and gas resource exploitation, it is mainly used in shale gas and low Fracturing stimulation of directional wells and horizontal wells that permeate oil production layers. [0003] With the advancement of oil and gas reservoir exploration and development, reservoir stimulation and fracturing technology is developing in the direction of multi-polarization, simple and fast stimulation in the later stage. However, the sliding sleeves in the prior art often require the help of a ball or a proprietary opening tool to assist in the...

Claims

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Application Information

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IPC IPC(8): E21B17/00E21B17/02E21B43/26E21B34/14
CPCE21B17/00E21B17/02E21B34/14E21B43/26
Inventor 甘振维陈晨周怡君赵伟刘涛李腾飞滕汶江钱江崔警宇
Owner CHINA PETROLEUM & CHEM CORP
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