There are two kinds of fishes in the course of drilling well. One is fallen from well head, for instance: tong keys, slip dogs, hand tools as well as screws, nuts etc. another is produced in the course of drilling well, for instance cones, pellets, cutter teeth and hard metal inserts etc. No matter what fishes happen, they have to be fished up to avoid influencing drilling well. There are two ways for fishing. One is drilling with fishing and another is specially fishing with fishing tools.
operation
The Junk Subs produced by our corporation have enough strength to bear various loads in the course of drilling without being damaged while it can carry out two kinds of fishing as above. Junk Sub is connected to the top of bit at drilling and a number of small fishes such as tong keys, slip dogs as well as screws, nuts etc can be flushed in to the sleeve of junk sub by circulating mud. After t ripping out, a large number of small fishes can be caught and so this way is convenient and efficient, that is to say, can clean up the bottom of well without needing to fish specially.
In addition, Junk Sub can work together with the one of magnet, reverse circulating junk basket and junk catcher etc for special fishing.
