A wireless control electric power repeated switch sliding sleeve sand blaster

Abstract

The invention relates to the technical field of sand jets for multistage oilfield fracturing, in particular to a wireless control electric repeated opening-closing type sliding sleeve sand jet.The sand jet comprises a sand jet main body, the upper end of the sand jet main body is connected with an upper connector through a thread, and the lower end of the sand jet main body is connected with a lower connector through a thread; the sand jet main body is radially provided with two sand outlets, the inner wall of the sand jet main body is provided with a wearproof lining sleeve, and an electric rotating sliding sleeve is installed at the inner diameter of the sand jet main body and the lower connector; the shaft section of the lower portion of the lower connector is provided with four groups of grooves in the direction from the outer diameter to the inner diameter, a battery pack, a wireless receiving and controlling module, a motor, a coupler and a shaft and gear driving system are installed in the grooves respectively, one gear of the shaft and gear driving system is installed at the outer diameter of the electric rotating sliding sleeve through a key, the other gear is installed on a driving shaft of the motor through a key, and when the motor shaft rotates, the gears are driven to perform transmission to drive the electric rotating sliding sleeve to rotate.According to the sand jet, the diameter of the sliding sleeve is equal, the drift diameter is large, the sliding sleeve can be repeatedly opened and closed for many times, and therefore rapid and efficient infinite-stage fracturing meeting the environmental protection requirement is achieved.

Description

technical field [0001] The invention relates to the technical field of sand blasters for multi-stage fracturing in oil fields, in particular to a wireless control electric power repeat switch type sliding sleeve sand blaster. Background technique [0002] The ball-sliding sleeve sand blaster is an important layering and sanding tool for hydraulic fracturing, but this type of tool uses a metal ball and a sliding sleeve to contact the sliding sleeve to suppress pressure and shear the sliding sleeve pin to open the sliding sleeve. The sliding sleeve is from top to bottom It is a step-by-step diameter reduction structure to adapt to the step-by-step passability and seating of the series of balls. The general classification upper limit is 6-8; due to the small inner diameter, a large throttling pressure loss occurs; the sliding sleeve cannot be opened and closed repeatedly, which cannot meet the requirements Environmental requirements for lifting and lowering pipe strings. This ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing ball-throwing sliding sleeve type sand blaster, which has a relatively large throttling pressure loss due to the small inner diameter; Repeated switch type sliding sleeve sand blaster, wireless control power repetitive switch type sliding sleeve sand blaster and packer are combined to form a multi-stage fracturing string, after using wireless control power to repeat the switch type sliding sleeve sand blaster, the whole trip The internal diameter of the pipe string is consistent and large, and any one-stage sand blaster can be selectively closed and opened. After the fracturing is completed, before the pipe string is pulled out, all the sand blasters can be closed at one time to achieve environmental protection.

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