1. Junk Trapper and Catch usually picks up on the drill bit or milling tool, with its collection of cups will circulate in borehole couldn't recovered heavier small falling objects. It can also be used for casing scraper above, make the casing scraper operation is fast and clean. 2. Junk Trapper and Catch salvage fragments falling object is mainly used in drilling process, such as cemented carbide teeth, bit bearing, etc.It is to keep the bottom clean, improve the service life of drill bit, drill bit to reduce and prevent accidental damage plays an important role.
Structure This tool is mainly composed of spindle, wiper block, outer tube, the joint and so on.Because the manufacturer is different, although its structure is similar, but not exactly the same, can be different according to downhole conditions.
Theory When this tool at work, downhole drilling cuttings by drilling fluid flow from the drill string out of the outer space, arrived at cup cone, due to the annulus suddenly become bigger, drilling fluid flow rate drop, heavy debris to get inside the cup, so as to achieve the purpose of cleaning bottom hole.