Water hammer pulse vibration pressurizing tool for long-horizontal-section horizontal well

Abstract

The invention relates to a water hammer pulse vibration pressurizing tool used for increasing axial pressure in a long-horizontal-section horizontal well. The technical scheme includes that the water hammer pulse vibration pressurizing tool mainly comprises a transmission shaft, a transmission shaft shell, a pressurizing assembly shell, a pressurizing assembly, a piston sleeve, a power assembly, a dynamic valve part, a wear-resistant valve, a static valve part and a lower joint, the transmission shaft shell, the pressurizing assembly shell, the power assembly and the lower joint are sequentially in threaded connection from top to bottom, the transmission shaft is matched with an inner hole of the transmission shaft shell, the upper end of the transmission shaft is connected with the piston sleeve through a thread, the pressurizing assembly is mounted between an isolating sleeve and the piston sleeve, the dynamic valve part is connected with the lower end of the power assembly through a thread, the static valve part is mounted in an inner hole in the upper end of the lower joint, and the wear-resistant valve is mounted in an inner hole in the upper end of the static valve part. The water hammer pulse vibration pressurizing tool has the advantages of good axial pressurizing effect, high vibration ability and simple structure, and extending and drilling ability of the long-horizontal-section horizontal well can be improved.

Description

technical field [0001] The invention relates to a water-hammer pulse vibration pressurization tool for horizontal wells with long horizontal sections, which is used in long horizontal section horizontal wells to increase axial pressure and improve the extended drilling capability of the horizontal section of the horizontal wells. Background technique [0002] With the deepening of the exploration and development process, the proportion of directional wells, horizontal wells and extended reach wells is increasing. Long horizontal section drilling technology has been widely used at home and abroad, mainly due to its good input-output ratio. At present, the drilling cost of horizontal wells in foreign countries has been reduced to 1.2 to 2 times that of vertical wells, while the output is 4 to 8 times that of vertical wells. As a potential new technology, horizontal well technology mainly has the following advantages: restoring the productivity of old wells, developing complex...

AI Technical Summary

Problems solved by technology

In the drilling process of horizontal wells and extended-reach wells, due to the large frictional resistance, the axial pressure effect of horizontal wells in long horizontal sections is poor, resulting in low drilling efficiency, long drilling cycle, and high drilling costs, which become constraints for horizontal wells and extended-reach wells Major bottlenecks in well development

In field practice, due to the poor axial pressurization effect of the pipe string, the following situations may occur: the ROP is significantly lower; the drilling tool cannot be lifted up or the drilling tool is broken; Low target rate in the target layer

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