PIPE HEAD Russian patent published in 2018 - IPC E21B33/04 

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular, to wellhead equipment for well operation. Pipe head includes a body with a stepped axial channel, lateral research channel and collection line, pipe holder, installed in the axial channel of the body, for suspension of the tubing string, cover, sleeve with radial channels, turning assembly. Pipe holder and sleeve are installed in the body so that the collection line of the body, when the sleeve is rotated in a specific manner, is configured to communicate with the longitudinal channel of the pipe holder through the radial channels of the sleeve. Research channel of the body is configured to communicate with well space outside the pipi holder. Under the pipe holder, there are projections or grooves, interacting with the corresponding internal grooves or projections of the body to avoid rotation. Sleeve is installed in the longitudinal channel of the pipe holder to rotate by means of the turning assembly, located above the sleeve and above the cover. Research channel and the collection line are located at one level perpendicular to the axis of the body at an angle along its perimeter, providing communication with channels of the pipe holder, to ensure sequential and alternate or simultaneous opening and hermetical closing to communicate with the longitudinal channel of the sleeve, when the sleeve is rotated.

EFFECT: proposed device provides reduced material costs by simplifying the manufacture of the pipe head, wider operational capabilities due to using both the sucker-rod pumping unit and the progressive cavity sucker-rod pumping unit , its higher reliability by simplifying the structure, reduced number of compounds working under pressure, and reduced metal consumption and overall dimensions.

1 cl, 5 dwg