Slurry hole internal circulation deslagging method and device

Abstract

The invention discloses a slurry hole inner circulation deslagging method and a device. The method is that: a device for driving slurry drives the slurry at some place far from the hole bottom of the hole to flash a drilling surface, the drilled slags are washed away from the hole bottom and form slurry ballast mixing liquid with the slurry, and after the slurry slag mixing liquid rises to some place away from the hole bottom, the slurry slag mixing liquid is then conveyed to the hole bottom to flash the drilling surface. The structure of the device is that: the upper and lower ends of a submersible sand pump (9) are respectively connected with a slurry output chamber (3) and a slurry input chamber (5); the upper part of the slurry output chamber is communicated with the bottom of an inner drilling rod (2) of a telescopic drilling rod (1); the lower part of the slurry input chamber is communicated with the upper end of a slurry input and output pipe (6); the lower end of a slurry input pipe (4) is communicated with the slurry input chamber; and the upper part of a slurry output pipe (10) is communicated with the slurry output chamber (3), and the lower part is communicated with the slurry input and output pipe (6). The invention need not to seal the expansion joint of the telescopic drilling rod, has a deslagging speed of about three times of the same kind of deslagging methods, and can save the reverse circulation sand pump and pipe thereof configured on the ground.

Description

technical field [0001] The present invention relates to a method and equipment for discharging muck, in particular to a method and equipment for discharging muck in a mud hole Background technique [0002] Existing mud circulation ballast removal methods all are mud hole inner and outer circulation ballast removal methods. For example, the dregs removal process of the mud positive circulation method is: the equipment driving the mud drives the mud from the mud pool to the bottom of the hole through the slurry pipeline, and then carries the drilling dregs to overflow the hole through the annular space between the slurry pipeline and the hole wall. The hole flows into the dregs tank, the drilling ballast settles in the dregs tank, and the mud flows into the mud tank, and then is input to the bottom of the hole. For another example, the slag discharge process of the mud reverse circulation slag removal method is: the equipment driving the mud drives the mud and the drilling sl...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned prior art has the following problems: due to the stoppage of the drill pipe, the opening and closing of the expansion joints, the time for the drill bit to enter and exit the hole for the joint operation of mud positive circulation and grab bucket transportation is about three times that of the drill bit carrying method. The rate of penetration is low

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