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Cyclone type reverse-circulation well flushing and fishing device

A technology of reverse circulation well flushing and fishing equipment, which is applied in the direction of flushing wellbore, wellbore/well components, earthwork drilling and production, etc. It can solve the problem of low debris extraction rate, reduce debris removal capacity, reduce costs, and improve The effect of slagging ability

Inactive Publication Date: 2018-10-30
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One object of the present invention is to provide a cyclone type reverse circulation well cleaning and fishing device, which is used to solve the problem of low debris extraction rate of existing well cleaning devices in operation

Method used

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  • Cyclone type reverse-circulation well flushing and fishing device
  • Cyclone type reverse-circulation well flushing and fishing device
  • Cyclone type reverse-circulation well flushing and fishing device

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Embodiment Construction

[0024] The present invention will be further explained below in conjunction with the drawings:

[0025] Combine Figure 1-Figure 5 As shown, this cyclone type reverse circulation well washing and fishing device includes a main body 1. The main body 1 is a cylinder with open ends. The bottom of the main body 1 is provided with a grinding shoe 2, and the main body 1 and the grinding shoe 2 are integrated; the upper end of the main body 1 With internal thread 4, the central channel of the body 1 is the chip removal channel 3. The wall of the body 1 is provided with six reduced diameter channels 5 with uniform angular distribution in the axial direction. The reduced diameter channel 5 is axial, and the opening of the reduced diameter channel 5 extends To the upper end surface of the body 1, the opening of the reduced diameter channel 5 is the inlet of the well flushing medium; the inner rotary nozzle hole 6 and the outer nozzle hole 7 are arranged in the body 1 at intervals in the ci...

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Abstract

The invention relates to a cyclone type reverse-circulation well flushing and fishing device. The device comprises a body, wherein a milling shoe is arranged at the bottom of the body; a chip removingchannel is the center channel of the body; reducing channels are uniformly distributed in the wall of the body along the peripheral direction, and openings of the reducing channels extend to the upper end face of the body; an inner rotating orifice and outer orifice are alternately arranged in the body along the peripheral direction, a certain reducing channel is connected with the inner rotatingorifice, and two reducing channels adjacent to the certain reducing channel are respectively connected with the outer orifice; a chip removing channel is communicated with the bottom end of the corresponding reducing channel through the inner rotating orifice; the outlet of the outer orifice is formed in the outer wall of the body, and the inlet of the outer orifice is formed in the bottom end ofthe corresponding reducing channel; and the included angle between the axis of the inner rotating orifice and the bottom horizontal plane of the body is 20-70 degrees, and the included angle betweenthe center line of the outer orifice and the center line of the reducing channel is 20-70 degrees. According to the cyclone type reverse-circulation well flushing and fishing device, chips at the orifice bottom can be washed without a dead angle, and the chip removing performance of the flushing device can be greatly improved.

Description

Technical field [0001] The invention relates to the technical field of well washing equipment, in particular to a cyclone type reverse circulation well washing and fishing device. Background technique [0002] Reverse circulation well washing and fishing technology is developed on the basis of reverse circulation drilling sampling technology. Compared with the positive circulation, the circulation form of the washing medium is different. According to the different working methods of reverse circulation, the washing method of local reverse circulation is refined in reverse circulation. The main difference between local reverse circulation and conventional reverse circulation technology is that local reverse circulation can change the circulation mode downhole, and this technology makes full use of The advantages of forward circulation and reverse circulation can achieve the purpose of not only washing the working face well but also enabling the cuttings to be discharged out of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/18E21B21/00E21B31/03
CPCE21B21/00E21B31/03E21B31/18
Inventor 冯翠菊王春生李均儒席可馨孙海洋吴欣遥
Owner NORTHEAST GASOLINEEUM UNIV
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