Low-frequency hydraulic pulse generating device and method for reservoir temporary-plugging diversion fracturing
A generating device and hydraulic technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., can solve the problems of uncontrollable steering uncertainty, etc., to improve the conductivity of fractures, inhibit the settlement of fracturing sand, The effect of reducing the crack initiation pressure
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0038] This embodiment provides a Figure 1 to Figure 5 The shown low-frequency hydraulic pulsation generating device and method for temporarily plugging and turning to fracturing of the reservoir, such as figure 1 As shown, it includes a cylinder body 2 and an upper joint 1 and a lower joint 13 respectively connected to the upper end and the lower end of the cylinder body 2. The cylinder body 2 is provided with a matching piston 3, such as figure 2 As shown, the upper part of the piston 3 is a cylindrical structure, the lower part is a cone structure, the upper end of the piston 3 is provided with a throttling device 4, the inside of the piston 3 is provided with a guide hole 10, and the throttling hole in the center of the throttling device 4 4-1 is connected up and down with the guide flow hole 10, and the diameter of the throttle flow hole 4-1 can be enlarged under the erosion of the fracturing fluid. The bottom of the piston 3 is provided with a return spring 11. The wa...
Embodiment 2
[0050] On the basis of embodiment 1, this embodiment provides a kind of figure 1 In the low-frequency hydraulic pulsation generating device and method for temporarily plugging and diverting fracturing of reservoirs shown, a pressure guiding hole 5 is arranged on the upper part of the piston 3 in the circumferential direction, and the pressure guiding hole 5 communicates with the throttling flow hole 4-1. Prevent pressure holding, reduce the pressure inside the cylinder during construction, prolong the practical life of the device, and at the same time reduce the fracturing sand from entering the gap between the piston and the cylinder to prevent jamming. The four pressure guide holes 5 are evenly distributed along the circumference of the piston 3, and the diameter of the pressure guide holes 5 is 3 mm to 4 mm.
[0051] Further, in order to prevent the piston 3 from being stuck by sand grains when going up and down, as image 3 As shown, the outer circumference of the lower p...
Embodiment 3
[0054] On the basis of embodiment 1, this embodiment provides a kind of figure 1 In the low-frequency hydraulic pulsation generating device and method for temporarily plugging and diverting fracturing of the reservoir shown, the length of the cylindrical structure on the upper part of the piston 3 accounts for one-third of the total length of the piston 3, and the taper of the cone structure on the lower part of the piston 3 is 1: (10-12).
[0055] The size of the throttling hole 4-1 on the throttling device 4 is determined by injecting a viscous plugging agent with a small displacement during the temporary blocking stage to ensure that low-frequency hydraulic pulsation can be generated. The diameter of the throttling hole 4-1 ranges from 10mm to 12mm, the length ranges from 20mm to 22mm, the diameter of the diversion hole 10 is 16mm to 20mm, and the length is 200mm to 220mm.
[0056] The first pressure relief hole 6, the second pressure relief hole 7, and the third pressure ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com