Combined operating device for perforating and sand fracturing
A technology of sand fracturing and combined production, which is applied in the fields of production fluids, wellbore/well components, and earth-moving drilling, etc., can solve the problems of fracture closure conductivity, productivity decline, and variation, and achieves reduction of operating costs, Simple operation, simple structure effect
Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
However, with the development of mining, the production capacity declines more seriously, and there are problems such as fracture closure or poor flow conductivity.
Method used
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[0026] The present invention will be further described below in conjunction with accompanying drawing.
[0027] figure 1 The structure of a combination device 100 for perforating and sand fracturing is shown. Such as figure 1 As shown, the combined device 100 includes a hydraulic perforating tool 2 , a combined tool 3 and a sand fracturing tool 5 . Wherein, the hydraulic perforating tool 2 has a first inner cavity 201 , and a nozzle 202 is arranged on the wall of the hydraulic perforating tool 2 . The nozzle 202 communicates with the first inner cavity 201 and is used for spraying high-pressure liquid outwards to create holes in the formation. The combined tool 3 is arranged at the lower end of the hydraulic perforating tool 2 and has a second inner cavity 301 to communicate with the first inner cavity 201 . A first sand filling flow hole 305 communicating with the second inner cavity 301 is provided on the wall of the combined tool 3 . The sand-filled fracturing tool 5 i...
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The invention provides a combined operating device for perforating and sand fracturing. The combined operating device comprises a waterpower perforating tool, a combined operating tool and a sand fracturing tool, wherein the waterpower perforating tool is provided with a first inner cavity, and a spray nozzle capable of communicating with the first inner cavity is arranged on the wall of the waterpower perforating tool; the combined operating tool is provided with a second inner cavity and arranged at the lower end of the waterpower perforating tool, and a first sand-adding overflowing hole capable of communicating with the second inner cavity is formed in the wall of the combined operating tool; and the sand fracturing tool is connected with the outer wall of the combined operating tool in a sleeving mode, and a second sand-adding overflowing hole capable of cooperating with the first sand-adding overflowing hole to form a sand-adding overflowing hole is formed in the wall of the sand-adding fracturing tool. The combined operating tool can axially move relative to the sand fracturing tool so as to enable the first sand-adding overflowing hole and the second sand-adding overflowing hole to communicate selectively. The combined operating device can sequentially complete perforating and sand fracturing, simplifies the operation of crack supplementing, and lowers operation cost.
Description
technical field [0001] The invention relates to the technical field of downhole operations in the field of petroleum and natural gas exploitation, in particular to a combined device for perforation and sand fracturing. Background technique [0002] In recent years, multi-stage fracturing technology for horizontal wells has been widely used in China. Although in the initial stage of fracturing, the oil and gas production capacity is relatively high. However, with the development of mining, the production capacity declines more seriously, and problems such as fracture closure or poor flow conductivity appear. According to investigations, the span between the fractures of the primary fracturing wells is relatively large, and in order to solve the above problems and increase oil and gas production, fractures can be added between the fractures of the primary fracturing wells. [0003] At present, when secondary fracturing is performed on a well that needs to be supplemented wit...
Claims
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Login to View More IPC IPC(8): E21B43/112E21B43/26
Inventor 秦金立李奎为刘阳陈作李洪春邵志香
Owner CHINA PETROLEUM & CHEM CORP