DEVICE FOR CLEANING OF BASIN FROM RADIOACTIVE BOTTOM SEDIMENTS Russian patent published in 2014 - IPC E21B43/08 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas industry and is intended for well strainers in producing and injection horizontal wells. The device contains a hollow case inserted into a well strainer component and an end plate made of magnesium and connected to the case in an annular groove inside the case. The groove is made in the upper part of the case; it has an inner cavity with a snap ring installed in it; the latter fixes the end plate inside the case rigidly. At the opposite side of the case there is an inner cylindrical cavity with mesh filter element with cells installed in it and fixed rigidly by a hollow sleeve. In the basic element an opening is made with the inner thrust, thread is cut inside the opening, the case blank is prepared, its length is measured and cut off, external screw thread is made and the annular groove and the inner cylindrical cavity are made inside the case; then the inner cavity is made inside the annular groove, the end plate is installed and fixed. The hollow case is overturned and the mesh filtering element is inserted into the inner cylindrical cavity, fixed by the hollow sleeve; then the hollow case is crewed into an opening at the basic element with end plate to outside until tight.

EFFECT: improving operational efficiency and service life of the strainer, simplifying its assembly.

2 cl, 2 dwg