Integrated damping switch separate layer fracturing device and method
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A layered fracturing and damping technology, which is used in wellbore/well valve devices, production fluids, and earth-moving drilling, etc., and can solve the risks of inability to achieve full well section backwashing, difficult layered fracturing, and pipe sticking. and other problems, to achieve the effect of improving anti-blocking ability, reducing erosion, and improving layered construction.
Active Publication Date: 2021-06-25
SHANDONG BOSAITE PETROLEUM TECH CO LTD
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The supporting products of layered fracturing technology are combined and connected by fracturing sliding sleeves, packers, and ball seat sealing cylinders. The overall length is long, and it is difficult to implement layered fracturing for wells with thin interlayers and limited isolation posi
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[0033] Example 1, reference figure 1According to the present invention, a integrated damping switch is laminated, including an upper joint 1, a shutdown spring 2, a closing sleeve 3, an intermediate joint 4, a shear pin 5, a fracture slide 6, an inner protective ring 7 , The guide pipe 8, the fixing ring 9, the outer protective ring 10, the guide sleeve 11, the cutting sleeve 12, the upper rubber base 13, the center tube 14, the rubber 15, the underlayer 16, the lower well protective cover 17, The lower joint 18, the shutdown spring 2 and the closing sleeve 3 are in the upper and downward active sleeve on the upper connector 1, and the lower joint 1 is fixed to the upper portion of the intermediate joint 4, and the upper joint 1 is passed through the shear pin 5 and fracturing. The slipper 6 is fixed, and there are two or more hole fracturing channels in the middle of the intermediate joint 4, and the guide tube 8 is set to the hole type fracturing channel, and the inner protectiv...
Example Embodiment
[0051] Example 2, reference figure 1 According to the present invention, a integrated damping switch is laminated, including an upper joint 1, a shutdown spring 2, a closing sleeve 3, an intermediate joint 4, a shear pin 5, a fracture slide 6, an inner protective ring 7 , The guide pipe 8, the fixing ring 9, the outer protective ring 10, the guide sleeve 11, the cutting sleeve 12, the upper rubber base 13, the center tube 14, the rubber 15, the underlayer 16, the lower well protective cover 17, The lower joint 18, the shutdown spring 2 and the closing sleeve 3 are in the upper and downward active sleeve on the upper connector 1, and the lower joint 1 is fixed to the upper portion of the intermediate joint 4, and the upper joint 1 is passed through the shear pin 5 and fracturing. The slipper 6 is fixed, and there are two or more hole fracturing channels in the middle of the intermediate joint 4, and the guide tube 8 is set to the hole type fracturing channel, and the inner protecti...
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Abstract
The invention discloses an integrated damping switch separate layer fracturing device and method. According to the technical scheme, a closing spring and a closing sleeve are sequentially and movably arranged on an upper connector in a sleeving mode from top to bottom, the interior of the upper connector is fixedly connected with a fracturing sliding sleeve, a hole type fracturing channel is formed in the middle of a middle connector, an inner protection ring is arranged in an annular space of the middle connector and the fracturing sliding sleeve in a sleeving mode, and an outer protection ring and a flow guide sleeve are fixedly connected with the exterior of the middle connector; the interior of the lower end of the middle connector is fixedly connected with the upper portion of a center pipe, and a sliding sleeve sealing cavity is formed in the center pipe and used for bearing the fracturing sliding sleeve; and the upper portion of a rubber sleeve is fixedly connected with the middle connector through an upper rubber sleeve base, and the lower portion of the rubber sleeve is movably connected with a lower connector through a lower rubber sleeve base. The integrated damping switch separate layer fracturing device and method have the advantages that the overall length of the device is reduced, a damping sliding sleeve automatic closing mechanism is additionally arranged, erosion of a propping agent to the closing sleeve during fracturing construction is reduced, the closing effect is improved, multi-layer fracturing construction is met, and backwashing of each layer of fracturing construction is thorough and effective.
Description
technical field [0001] The invention relates to the technical field of oilfield fracturing, in particular to an integrated damping switch layered fracturing device and method. Background technique [0002] Due to the poor connectivity of low permeability reservoirs, the production of oil wells is low before measures are taken. During oilfield development, low permeability formations should be fractured to increase formation connectivity, improve oil well productivity, and achieve the purpose of economical and efficient production. With the continuous improvement of oilfield development technology, the technical demand for fine layered fracturing in multi-layer sections is becoming more and more extensive. With the continuous deepening of oilfield exploration in my country and the continuous improvement of oil layer stimulation technology, layered development technology has It is widely used in the development of oil and gas reservoirs, especially thin interlayer and low perme...
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