Borehole operation tool

Abstract

The invention discloses a borehole operation tool. The borehole operation tool comprises a wiper trip device in a circular tubular structure, the outer wall of the wiper trip device is provided with multiple bar-type bulges at an interval, the portion between the two adjacent bulges is a flow passage used for circulating flow liquid; a pressure testing mechanism comprises a valve tube, a valve seat, a valve ball and shear pins, wherein the valve tube is a circular tube structure, the upper end of the valve tube is connected with the lower end of the wiper trip device, and the valve tube is provided with pin holes used for piercing the shear pins; the valve seat is in a circular tube shape, the inner surface of the upper end of the valve seat is used for being matched with the valve ball, and the outer surface of the valve seat is provided with a pin shear groove used for clamping the shear pins; a punch is in a guide cone shape structure, the punch is arranged at the lower end of the valve tube, and circulation holes are formed in the punch. According to the borehole operation tool, one pipe column can complete three borehole operations including wiper trip, oil pipe pressure testing and well flushing, and the borehole operation tool has higher construction safety.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a downhole operation tool. Background technique [0002] Well drilling, tubing pressure testing, and well washing are the key links in wellbore preparation for gravel packing sand control field operations in horizontal wells. Among them, the purpose of drilling the well is to verify the integrity of the wellbore; the purpose of the tubing pressure test is to verify the integrity of the tubing used in the construction operation; the purpose of washing the well is to ensure that the wellbore is clean, which is the key to avoid construction risks in the sand control field construction of horizontal well gravel packing. important security measure. [0003] In the past, the drilling, tubing pressure test, and well washing of horizontal well gravel packing sand control field operations were completed by independent operating strings, and there were some shortcomings: ...

AI Technical Summary

Problems solved by technology

[0003] In the past, the drilling, tubing pressure test, and well washing of horizontal well gravel packing sand control field operations were completed by independent operating strings, and there were some shortcomings: firstly, the independent operating strings had high operating costs and long operating cycles; The well gauge used is a cylindrical tube type well gauge. The small area of ​​the liquid flow channel of this well gauge is not conducive to well flushing. At the same time, the suction and excitation pressure during the lifting operation is high, and there is a large construction safety hazard.

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