Casing scraper is to cut the inner wall of casing, remove cement, hard wax, salt scale and gunnel burr on the inner wall of casing, it is an important process for well repairing operation and normal downhole operation, for the downhole tools to go down into the well and normal work there and then for the next step of construction.
Role and Characteristics
The casing scraper can be used to remove cement blocks, cement rings, hard wax, various salt crystals and deposits, shot hole burrs and iron oxides produced after casing corrosion on the inner wall of the casing, so as to allow unobstructed access to all kinds of downhole tools. Especially in the downhole tools and casing wall ring space is small, more should be in the full scraping, and then proceed to the next step of construction. Some domestic oilfields as well as foreign oil and water well construction operations, the use of scrapers has become an essential process, the purpose of which is to improve the tools into the work and the success rate. For example, the success rate of seating and sealing of the packer.