Selective re-fracturing technology for old well of oil field
A technology of repeated fracturing and process technology, which is applied in the directions of wellbore/well components, production fluids, earth-moving drilling and production, etc., to achieve the effect of simple structure, convenient operation and high efficiency
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[0019] refer to Figures 1 to 5 The embodiment of the technology of the present invention is further described:
[0020] Taking an old horizontal well in an oil field as an example, there are two intervals that have been transformed, and now it is necessary to re-perforate and add two intervals to be transformed. The process string used in this construction consists of oil pipe 1, safety hand 2, upper packer 3, middle packer 4, hydraulic jet 5, lower packer 6, ball seat 7, check valve 8, eye pipe 9 and plug 10 form.
[0021] The concrete process steps of the technology of the present invention are as follows:
[0022] 1) According to the needs of repeated transformation and the designed interval, assemble and lower the pipe string (see figure 2 );
[0023] 2) Drag the pipe string several times to complete the perforation operation in the required reformation interval (see figure 2 , 3 );
[0024] 3) After the perforation of all intervals to be reformed is completed, t...
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