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As we all know, there are many kinds of drills, and three-squeegee bits are one of them. The three-squeegee bit is a tool commonly used in workover operations to drill cement plugs, scrape dirt and hard wax on the casing wall, and crystallize some minerals. The wellbore can also be scraped to make the wall of the well clean and tidy. It can also be used for drilling in liners, drilling for sidetracking, or drilling and grinding of perforated shells. The following Xiaobian will introduce the use, working principle and operation method of the three scraper bit.
Three scraper bit use
It is used to drill cement plugs, punch sand bridges, salt bridges, scrape dirt and hard wax on casing walls, and crystallize certain minerals. It can also be used to shave boreholes, which can be used for drilling in liners, drilling for sidetracking, or drilling of percussive shell pads.
Three scraper drill working principle
Under the action of the weight-on-bit, the tip of the drill bit eats the drilled material such as cement, and then through the rotation, the eat-in portion is cut in the circumferential direction, and the drilled object is gradually drilled.
Three scraper bit operation method
1, inspection tools, mapping sketches
2. Connect to a single root above the expected depth and start pump flushing.
3, decentralization, rotating the column. Pressure 3kN, speed is less than 70r/min.
4. After the drill is in place, the well is circulated and washed for more than one week.
Three scraper drill bit matters needing attention
1, the bottom of the well contact surface, no rolling friction, all eat into the cutting, so the required torque is larger, so in the operation, should use low pressure and slow turn of the technical parameters, or drill wear serious.
2. The threads should not be too tight, making it difficult to shackle or damage the equipment.
After reading the contents of the application, working principle, and operation methods of the three scraper drill bits, the author believes that everyone should now have a certain understanding of the three scraper drill bits. In the pit digging operation, a drill bit is often used, and the drill bit rotates with the vertical shaft while moving axially. Three scraper drill bit is one of our common drilling tools. It is welded by the joint and the bit body.
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