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Single-loop hydrofracturing in-situ stress measuring system

A hydraulic fracturing and stress measurement technology, applied in the field of measurement systems, can solve problems such as difficult handling, easy to get stuck in the hole, double-circuit unusable, etc., and achieve the effect of simplifying the test procedure, shortening the test time, and widening the application range

Inactive Publication Date: 2015-03-25
李忠久
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantage is that a large number of loops of high-pressure hose seat packers are required in deep drilling. When the drill hole falls off and partially collapses, it is easy to get stuck in the hole, and it is quite difficult to handle; , the dual loop cannot be used

Method used

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  • Single-loop hydrofracturing in-situ stress measuring system

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Embodiment Construction

[0017] As shown in the figure, the present invention includes a high-pressure pump 7, a pressure sensor 9 is arranged on the side of the high-pressure pump 7, and a pressure recorder 5 is arranged on the side of the high-pressure pump 7 corresponding to the pressure sensor 9; A drill hole is provided on the side, the drill hole is arranged under the derrick 8, a drill pipe 4 is arranged in the drill hole, the high-pressure pump 7 is connected with the drill pipe 4, the lower end of the drill pipe 4 is connected with the packer 1, and the drill pipe 4 is connected with the A transfer switch 3 is arranged between the packers 1 , and a fracturing section 2 is arranged in the middle of the packer 1 .

[0018] The drill rod 4 is made of stainless steel; the stainless steel drill rod is durable and not easily corroded and rusted by water.

[0019] The single-circuit hydraulic fracturing test system must meet the three key links of setting, fracturing and unsealing in the proce...

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Abstract

The invention provides a single-loop hydrofracturing in-situ stress measuring system simple to use and widely applicable, relates to measuring systems and particularly relates to modification of the single-loop hydrofracturing in-situ stress measuring system. The system comprising a high-pressure pump is structurally characterized in that a pressure sensor is provided beside the high-pressure pump, a pressure recorder corresponding to the pressure sensor is disposed under the high-pressure pump, the side of the high-pressure pump is provided with a borehole provided under a derrick, a drill pipe is disposed within the borehole and connected with the high-pressure pump, the lower end of the drill pipe is connected with a packer, a conversion switch is disposed between the drill pipe and the packer, and the middle of the packer is provided with a fracturing segment.

Description

technical field [0001] The invention relates to a measurement system, in particular to an improvement of a single-circuit hydraulic fracturing in-situ stress measurement system. Background technique [0002] The hydraulic fracturing technology originated from the Gordon Gas Field in Kansas, USA, and it is an important production stimulation measure for oil and natural gas. In 1957, Hubbert and Willis published the theoretical research results of the relationship between the tensile fracture caused by hydraulic fracturing and the surrounding stress. After decades of theoretical and experimental research, it has become an effective and practical method for measuring the deep crustal stress. [0003] Early on-site measurements were carried out using a dual-circuit test system. The so-called dual-circuit means that one circuit communicates with the sealer and is used for pressurization and sealing of the sealer, and the other circuit communicates with the test section and is use...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B49/008
Inventor 李忠久陆德运侯冰
Owner 李忠久
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