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A segmented hydraulic shock fracturing string for a long-span well and its implementation method

A technology of hydraulic shock and fracturing pipe strings, which is applied in the direction of earthwork drilling, wellbore/well components, and production fluids, etc. It can solve problems such as the inability of the supercharger to work, avoid repeated tripping and lowering of the pipe string, and reduce hydraulic pressure. Shock pressure strength, effect of reducing operating costs

Active Publication Date: 2021-03-12
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve multi-layer operation, the multi-stage hydraulic deblocking supercharger requires high-horsepower fracturing pumps and other equipment. Secondly, due to the connectivity between the annulus and the formation, there is a risk that the supercharger will not work.

Method used

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  • A segmented hydraulic shock fracturing string for a long-span well and its implementation method
  • A segmented hydraulic shock fracturing string for a long-span well and its implementation method
  • A segmented hydraulic shock fracturing string for a long-span well and its implementation method

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Embodiment Construction

[0026] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0027] like Figure 1 to Figure 3 As shown, this embodiment discloses a segmented hydraulic shock fracturing string for a large-span well, including oil pipes and variable buttons for connecting the main body, and two or more oil pipes and variable buttons are connected in series from top to bottom. The number of hydraulic shock fracturing devices 3 is determined according to the number of operating sections, and each hydraulic shock fracturing device 3 corresponds to an operating section of a long-span well. Each hydraulic shock fracturing device includes components such as a draft tube 7 , a shock plate 8 , a shock chamber 9 , a plunger seat 10 , a tail pipe 11 , and a receiver 12 . The bottom of the lowermost hydraulic shock fracturing de...

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Abstract

The invention belongs to the technical field of oil and gas field reservoir transformation, and discloses a segmented hydraulic shock fracturing pipe string for a large-span well and an implementation method thereof. The pipe string includes at least two hydraulic shock fracturing devices connected in series, except In addition, other hydraulic shock fracturing devices are equipped with guide pipes, ball seats and center pipes, which are used to transmit liquid pressure and perform hydraulic shock fracturing on the next operation section; The compressive value of the impact plate in the hydraulic impact fracturing device is used to complete the hydraulic impact of the lowermost working section; then, from bottom to top, steel balls suitable for the ball seat in the hydraulic impact fracturing device of this section are dropped one by one, and passed through the ground pump Pressurize again to make the steel ball falling into the ball seat seal the central tube, open the pressure relief hole through the pressurized opening valve, and continue to pressurize. Complete the hydraulic impact of the operation section; until the hydraulic impact of all the operation sections is completed.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field reservoir reconstruction, and in particular relates to a segmented hydraulic impact fracturing pipe string for a large-span well and an implementation method thereof. Background technique [0002] Hydraulic shock fracturing technology is a green, low-cost hydraulic fracturing technology that does not occupy operating space. It has been studied and applied in China since the 1980s and 1990s. It has been implemented in thousands of wells in other oil fields, and the effect is remarkable. This technology can be operated with conventional acidizing pumps or cementing pumps. It does not require fracturing pumps and a large amount of fracturing fluid, does not occupy platform space, and the percussion tools can be reused with low cost. Compared with hydraulic fracturing and deflagration fracturing, the operating cost can be greatly reduced, and at the same time, it does not involve pyrotechnic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 孙林杨万有李旭光易飞黄波邹信波刘帅张磊周际永程心平罗昌华张凤辉熊培祺
Owner CHINA NAT OFFSHORE OIL CORP
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