Hydraulic chambering device for drilling

Abstract

The invention relates to a hydraulic chambering device for drilling, and the device comprises an upper joint, a shell, a lower shell, a lower joint, a spindle, a sealing pipe and a blade which are connected in sequence, wherein the sealing pipe and the blade are connected with the spindle. The device is characterized in that a piston is arranged between the shell and the spindle and connected with a locking and unlocking mechanism; one end of the locking and unlocking mechanism is connected with a baffle plate; a blade reset adjusting mechanism is arranged between the spindle and the shell; one end of the blade reset adjusting mechanism is connected with the baffle plate; the a blade is mounted between two baffle plates on the two mechanisms; a suspension joint is arranged at one end of the spindle between the upper joint and the shell; an upper ball base is arranged inside one end of the spindle; and a lower ball base is arranged inside one end of the sealing pipe. The device provided by the invention is suitable for back reaming, forward reaming and drilling reaming in the drilling process, and can be used for effectively enlarging the well diameter, improving the drilling efficiency, enhancing the annular space between a sleeve and a well wall, improving the quality of wells, and greatly improving the sand prevention quality and oil drainage area in wells requiring naked eye gravel filling sand prevention operation.

Description

technical field [0001] The invention belongs to the technical field of oil and gas drilling and completion, in particular to a drilling hydraulic reaming device. Background technique [0002] In the well-known field of drilling and completion, due to the nature of rocks in some formations, in-situ stress and mud immersion, complex situations such as slippage, borehole diameter shrinkage, wellbore collapse or collapse may occur in the formation, in order to avoid Or slow down the adverse effects caused by diameter reduction and collapse. At present, the reaming while drilling tool has been used at home and abroad and has certain working results. The above-mentioned reaming tools are mainly divided into two categories. One is a fixed structure. The fixed reamer is similar to a stabilizer. It can effectively cut the well wall during the drilling process and play a role in keeping the diameter. The hole diameter shrinkage in the upper well section during drilling will lead to p...

AI Technical Summary

Problems solved by technology

[0003] There are still many problems in the process of using the expandable reamer: due to the unilateral force on the blade of the reaming tool, the large torque and serious jumping, it is easy to cause different degrees of damage to the drill bit and drill string; when the wellbore is a helical When the wellbore is not well-shaped and the quality of the wellbore is poor, it is impossible to judge whether the blade reaches the predetermined outer diameter. There is no locking mechanism after the blade is opened and in place. The diameter of the hole; if a mud bag occurs, the blade cannot be retracted due to insufficient spring thrust of the reaming tool; there is no check valve at the water eye, which may easily cause water eye blockage

Since there is not yet a well-structured, high-quality and very mature hydraulic reaming tool, it is difficult to perform hydraulic reaming operations during drilling and completion operations.

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