GARIPOV WELL CHAMBER (VERSIONS) Russian patent published in 2010 - IPC E21B23/02 E21B23/03 E21B34/06 

FIELD: oil and gas industry.

SUBSTANCE: as per the first version, well chamber consists of supporting pipe the ends of which has either external or internal, or external and internal connection threads, a pocket provided with internal bores, mounting surfaces, at least with one bypass hole located in the wall, which represents a piece of pipe the ends of which have either external or internal, or external and internal connection threads, the pocket is provided with a plugged or open lower end, upper tip consisting of external surfaces of guide element, which are connected to each other as to conjugation place, at that, guide element has inner cavity; and tubular element the inner cavities of which are interconnected to each other by means of a cutout located in tubular element wall and made so that a wireline tool can pass through it. Supporting pipe is installed in lower end of tubular element by means of inner connection thread, or without thread. And inner mandrel is installed in upper end of tubular element by means of inner connection thread or without thread, and which is made with possibility of rotating and guiding the wireline tool. Inner cavity of guide element is provided with possibility of directed passage of wireline tool along it to the pocket. Pocket is installed in lower part of guide element by means of inner connection thread or without thread. Supporting pipe and pocket are located parallel or inclined relative to each other. As per the second version, lower end of tubular element of the well chamber is plugged.

EFFECT: reducing metal consumption of well chamber and increasing operating life of its separate elements.

23 cl, 5 dwg