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A multi-branch regional fracturing tool

A multi-branch and regional technology, applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc., can solve problems such as fracturing, achieve the effect of expanding the area, expanding the working range, and simple control

Active Publication Date: 2021-07-23
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-branch area fracturing tool in order to solve the problem of large-scale hydraulic fracturing in a large area

Method used

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  • A multi-branch regional fracturing tool
  • A multi-branch regional fracturing tool
  • A multi-branch regional fracturing tool

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Embodiment Construction

[0015] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 As shown, a multi-branch area fracturing tool of the present invention is composed of an upper joint 1, an upper cylinder body 2, a power rotating shaft 3, an anti-rotation pin 4, a screw nut 5, a winding shaft body 6, a coiled tubing 7, a lower Cylinder body 8, water jet head 9, guide head 10 and guide cone 11 constitute. Its structural features are: the upper end of the upper joint 1 is connected with the upper pipe string with a thread, the lower end of the upper joint 1 is connected with the upper end of the upper cylinder 2 with a thread; the upper end of the lower cylinder 8 is connected with the lower end of the upper cylinder 2 with a thread, and the lower cylinder 8 The lower end is connected with the upper end of the guide cone 11 with screws; two threaded holes are uniformly arranged in the middle of the upper cylinder body 2 in the circumferential direction, and the two anti-r...

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Abstract

The invention relates to a petroleum field, in particular to a multi-branch regional fracturing tool used in the field of oil recovery or gas recovery. It solves the problem of large-scale, large-scale hydraulic fracturing. Its technical scheme is: the upper end of the upper joint is connected with the upper pipe string with a screw, the lower end of the upper joint is connected with the upper end of the upper cylinder with a screw; the upper end of the lower cylinder is connected with the lower end of the upper cylinder with a screw, and the lower end of the upper cylinder is connected with the upper end of the guide cone buckle connection; the power shaft is placed in the inner cavity of the upper cylinder, and the screw shaft at the lower part of the power rotor cooperates with the screw nut to form a screw nut pair; The guide head is connected with screws; the six coiled tubing are respectively wound in a helical shape in six helical grooves in the middle of the outer circle of the winding shaft. The invention expands the working scope of the fracturing pipeline, expands the area of ​​fracturing operation, and is beneficial to the development of regional fracturing operation with a larger area and the improvement of the recovery rate of oil and gas.

Description

technical field [0001] The invention relates to a petroleum field, in particular to a multi-branch regional fracturing tool used in the field of oil recovery or gas recovery. Background technique [0002] In the oil and gas industry, fracturing operations can create fractures in the formation, improve the underground flow environment, and increase the production of oil and gas wells, especially for low-permeability oil wells. The main principle of hydraulic fracturing is to inject high-viscosity liquid into the well with a displacement that greatly exceeds the absorption capacity of the formation by using a high-pressure pump set on the surface, and to build up high pressure at the bottom of the well. When the tensile strength is high, fractures will be generated in the formation near the bottom of the well, and the sand-carrying fluid with proppant will continue to be injected, and the fractures will extend forward and be filled with proppant. Sand-filled fractures with a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B43/114E21B43/119
CPCE21B43/114E21B43/119E21B43/26
Inventor 孔春岩辛红伟王国军刘春林赵勇李双双张然
Owner XIHUA UNIV