Title:
ROCK STRATUM FRACTURING METHOD AND EQUIPMENT USING VARIABLE-FREQUENCY PULSE FRACTURE NETWORK
Document Type and Number:
WIPO Patent Application WO/2024/077842
Kind Code:
A1
Abstract:
A rock stratum fracturing method and equipment using a variable-frequency pulse fracture network. The fracturing method comprises: first, determining an initial pulse pressure peak of each rock stratum according to the physical and mechanical properties and the confining pressure of each rock stratum, and determining a pulse frequency of each rock stratum according to a collision force measurement experiment for each rock stratum; then, according to the initial pulse pressure peak and the pulse frequency, designing a fracturing pumping scheme using a variable-frequency pulse fracture network, and according to different operating conditions, designing a rock stratum fracturing drill hole arrangement scheme using a variable-frequency pulse fracture network; and finally, according to the drill hole arrangement scheme, punching a fracturing hole, and performing fracturing according to the fracturing pumping scheme. The rock stratum fracturing equipment using a variable-frequency pulse fracture network comprises a pumping-mode-variable and frequency-variable fracturing pump (4), a hydraulic fracturing measurement and control instrument (13), an automatic packer (21), a mechanical rod feeding machine (19) and a two-way water injection steel pipe (20). By means of the rock stratum fracturing method and equipment using a variable-frequency pulse fracture network, a plurality of annular fracture network structures can be formed near a drill hole from near to far and stage by stage, and are finally sequentially stacked into a relatively large-range fracture network, thereby fully breaking up a relatively large-range rock mass.
Inventors:
HUANG BINGXIANG (CN)
ZHAO XINGLONG (CN)
SHAO LUYING (CN)
CHEN SHULIANG (CN)
XING YUEKUN (CN)
ZHAO XINGLONG (CN)
SHAO LUYING (CN)
CHEN SHULIANG (CN)
XING YUEKUN (CN)
Application Number:
PCT/CN2023/078951
Publication Date:
April 18, 2024
Filing Date:
March 01, 2023
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
XUZHOU USURE MINING TECH CO LTD (CN)
XUZHOU USURE MINING TECH CO LTD (CN)
International Classes:
E21B43/26
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Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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