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Sound wave shock and pulse combustion type pressing crack apparatus

A pulsed combustion and acoustic wave technology, applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problem that the fracturing effect of fracturing bombs is difficult to meet the requirements, the peak combustion pressure rises quickly, and the combustion time of gunpowder is short, etc. problems, to achieve the effect of shortening the construction period, long pressure duration, and easy construction operation.

Active Publication Date: 2010-07-28
WUHUA ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The main defects of this traditional high-energy gas fracturing process are: long ignition time, short gunpowder combustion time; rapid rise of combustion pressure peak, short peak pressure hold
Therefore, the fracturing effect of this type of fracturing bomb is still difficult to meet the requirements.

Method used

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  • Sound wave shock and pulse combustion type pressing crack apparatus
  • Sound wave shock and pulse combustion type pressing crack apparatus
  • Sound wave shock and pulse combustion type pressing crack apparatus

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0022] as figure 1 As shown, the preferred embodiment of the present invention includes two ignition powder columns 2 , two main charge columns 4 , a lower cover 1 , an upper cover 7 , two electric igniters 3 , steel ropes 9 and suspension rings 10 . Both the ignition charge and the main charge 4 are cylindrical charges cast by solid propellant, the charge has an axial center hole 6 and a radial through hole 5 and the outer wall has four mutually 90° The semicircular groove 11, the central hole 6 and the radial through hole 5 communicate with each other (see figure 2 ). according to image 3 As shown, the diameter D of the ignition charge 2 and the main charge 4 is 102 mm, the length L of a single main charge 4 is 1.2 mm, the diameter d of the axial central hole 6 is 30 mm, and the radial through hole 5 diameter d k =0.6d=18; t...

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Abstract

The present invention discloses a sonic oscillation and pulsed combustion type fracturing device. It is a powder column string made up by using two igniter columns and several main powder-charged columns and making them be overlapped together. Every igniter column and main powder-charged column are characterized by respectively adopting cylindrical powder column made up by adopting solid propellant containing ammonium perchlorate oxidant and polysulfide rubber combustion agent, on said igniter columns and main powder-charged columns are set axial central holes and radial through holes which are mutually communicated, in the lower end portion of igniter column an electric igniter is set.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well high-energy gas production and efficiency enhancement operations, and in particular relates to a solid gunpowder unstable combustion fracturing device suitable for the oil and gas well fracturing efficiency enhancement process. Background technique [0002] During the perforation process of oil and gas wells, the perforation energy-gathering metal jet and high-temperature and high-pressure gas form a "medium compaction zone" in the perforation area of ​​the perforation energy-gathering metal jet while perforating. This compacted area obstructs or blocks the passage of oil and gas. In addition, during the production process of oil and gas wells, due to the continuous continuous exploitation, a large amount of colloidal substances such as paraffin, asphalt and coal tar will be deposited in the oil rock formation, coupled with the precipitation of salt, the formation of emulsion, the expansi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/263
CPCE21B43/263
Inventor 王秀芝惠嘉李哲宇
Owner WUHUA ENERGY TECH CO LTD
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