Direct current drill pipe screen
In order to prevent the large-diameter cuttings or sand particles in the drilling fluid from blocking the water hole of the bit and causing unnecessary tripping in the drilling process, it is necessary to use the drill pipe screen.
In the process of using the current drill pipe screen, large sand particles are filtered, but some small sand particles and dirt are easy to block the screen hole, which affects its service life.
In order to overcome the problem that the screen hole of the existing drill pipe screen is easy to block and the service life is short, bluslot has developed a DC drill pipe screen, which is not easy to block and has the characteristics of long service life, small head loss, and no pump choking.
Bluslot Direct current drill pipe screen. The existing problems of the screen hole of drill pipe screen are easy to block and the service life is short.
It is characterized by：The sidewall of the standpipe is provided with a plurality of standpipe screen holes, the standpipe screen holes are staggered, the inner diameter of the standpipe screen holes is larger than the outer diameter of the trumpet mouth shape, and the outer diameter of the standpipe screen holes gradually decreases from top to bottom; The upper part of the riser is fixed with a top cover, and the top cover is provided with a top cover hole, the bottom of the riser is fixed with a sieve bowl, and the bottom of the sieve bowl is provided with a plurality of sieve bowl holes.
The whole screen bowl is in the shape of an inverted cone, and a fillet is formed between the inner cone surface and the inner bottom surface.
The screen hole of the direct current drill pipe screen is not easy to block and has the characteristics of long service life, small head loss, and no pump choking.
There are many rows of sieve holes on the sidewall of the riser. The sieve holes are small on the outside and large on the inside, which can avoid the fine sand particles blocking the sieve holes.
At the same time, the outer diameter of the screen hole gradually becomes smaller from top to bottom, so that the drilling fluid is blocked by the filter in the process of descending from the bottom of the Kelly protection joint to the water hole.
Sand larger than the pore diameter will be deposited in a bowl-shaped sieve bowl or blocked in the through-hole on the sidewall of the riser to realize filtration and prevent plugging of the drill water hole.
The hole diameter of the sidewall of the riser gradually decreases from top to bottom, which ensures that when the filter is scrapped as a whole, all the holes are damaged uniformly, thus prolonging the overall life of the filter.
The common way of spraying from inside to outside is changed and the principle of spraying from outside to inside is adopted.
The structure of the uniform aperture on the sidewall of the screen pipe is changed, and the aperture is gradually reduced from top to bottom. And the screen hole is small on the outside and large on the inside, so as to ensure that the filter has the advantages of protecting the inner wall of the drill pipe female joint from damage, long service life, small head loss, no pump choking, and effective filtering.