DEVICE FOR CLEANING AND FLUSHING THE WELL WITH MECHANICAL CONVERSION OF TRANSLATION INTO ROTATION Russian patent published in 2019 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular to devices for cleaning and flushing of well. Proposed device comprises adapter to be jointed with pipe string and provided with through hole. Housing of device is made with safety ring and hollow piston with holes rigidly connected with adapter. Piston is furnished with a mandrel with screw grooves and a longitudinal hole. Piston can be fixed by axial movement of transportation screw and interacts with mandrel by means of balls. Balls have the possibility of accommodating mandrel and piston orifices inside said slots. Balls are fixed by inserts on the side of the piston, at that each groove in the cross section has radial shape and is equal to radius of the ball, and each hole is equal to diameter of the ball. Mandrel forms an inner cavity with the piston tightly protected by seals. Proposed device comprises cleaning tool with lengthwise bore to convert back-and-forth movement when running into rotary motion due to ball movement in grooves. Besides, washing liquid for washing has possibility of direct and back supply through holes.

EFFECT: increased reliability of the device, increased service life of the device, simplified design and expanded possibilities of use.

1 cl, 3 dwg