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Heat-conduction deflagration-delayed fracturing device and construction method

A fracturing and deflagration technology, which is applied in the direction of earthwork drilling, mining fluid, wellbore/well components, etc., to achieve the effect of solving the difficulty of detonation, simple device design, and heat transfer detonation

Inactive Publication Date: 2020-08-18
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, although there are many deflagration fracturing delayed detonation methods, there is no deflagration fracturing device that uses the heat conduction between propellant columns to achieve delayed detonation, especially the heat conduction delayed deflagration fracturing device with reasonable design, simple operation and strong adaptability. device

Method used

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  • Heat-conduction deflagration-delayed fracturing device and construction method
  • Heat-conduction deflagration-delayed fracturing device and construction method

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Embodiment 1

[0038] like figure 1 As shown, this embodiment provides a heat conduction delayed deflagration fracturing device, which includes a bludgeoning guide 1, a first subsection 2 and a second subsection 3 arranged sequentially from top to bottom; the bottom of the bludgeoning guide 1 A struck element 5 is provided, and the bottom of the struck element 5 corresponds to the first high-temperature-resistant ignition charge 14 in the first short section 2, and the first high-temperature-resistant ignition charge 14 is connected with the first An ignition and detonation mechanism, the first ignition and detonation mechanism is used to detonate the first high temperature resistant propellant 15 in the first short joint 2; the bottom of the first short joint 2 is provided with a heat conduction rod 16, and the heat conduction The bottom of the rod 16 protrudes into the second short section 3 and is in contact with the flammable powder 20 in the second short section 3, and a second ignition...

Embodiment 2

[0049] This embodiment provides a construction method using the heat conduction delayed deflagration fracturing device in Embodiment 1, which includes the following steps:

[0050] The first step is to assemble the first short joint 2 and the second short joint 3, the process is as follows:

[0051] S101. Preparation of sub-joint housing 17 and gunpowder: according to the depth, pressure, temperature of the construction target layer and the well diameter conditions of the construction shaft, select the sub-joint housing 17 of an appropriate size, and the maximum outer diameter of the sub-joint housing 17 is smaller than the wellbore Inner diameter, high-temperature-resistant propellant and high-temperature-resistant igniting powder should be lower than the target layer temperature. When the construction shaft has a large well inclination, pulleys should be symmetrically added to both ends of the nipple casing 17 to ensure heat conduction during lifting and lowering. The delaye...

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Abstract

The invention discloses a heat-conduction deflagration-delayed fracturing device and a construction method, and relates to the technical field of deflagration fracturing of oil and gas field development engineering. The heat-conduction deflagration-delayed fracturing device comprises a blunt impact guider, a first short section and a second short section, wherein an impacted element is arranged atthe bottom of the blunt impact guider, the bottom of the impacted element corresponds to first high-temperature-resistant gunpowder in the first short section, and a first ignition detonating mechanism connected with the first high-temperature-resistant gunpowder is arranged; and a heat conduction rod is arranged at the bottom of the first short section, the bottom of the heat conduction rod stretches into the second short section and makes contact with inflammable gunpowder in the second short section, and a second ignition detonating mechanism connected with the inflammable gunpowder is arranged. The heat-conduction deflagration-delayed fracturing device is reasonable in design and simple in operation, after high-temperature gas is generated by the high-temperature-resistant gunpowder inside the first short section, the heat conduction rod conducts heat transfer to ignite the high-temperature-resistant gunpowder inside the first short section, then deflagration of the high-temperature-resistant gunpowder inside the second short section is achieved, and the deflagration delaying effect is achieved through using the second-level heat transfer scale.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development engineering deflagration fracturing, in particular to a heat conduction delayed deflagration fracturing device and a construction method. Background technique [0002] Deflagration fracturing, also known as high-energy gas fracturing, is a reservoir stimulation technology that uses high-temperature and high-pressure gas to quickly impact the formation through the combustion of gunpowder or propellant, forming multiple fractures near the wellbore. This technology has low cost, low pollution and strong adaptability, and it can be applied in shallow, medium and deep wells in sandstone and carbonate reservoirs. With the improvement of complex fracture network reconstruction requirements, deflagration fracturing technology has shown important application potential, and a multi-stage pulse deflagration fracturing technology based on delayed deflagration was proposed. [0003] In t...

Claims

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Application Information

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IPC IPC(8): E21B43/263
CPCE21B43/263
Inventor 郑黎明杨满平褚庆忠阳鑫军王连进
Owner YANSHAN UNIV
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