UNIFIED WELL CHAMBER FOR REMOVABLE DEVICES OR INSTRUMENTS OF VARIOUS LENGTHS Russian patent published in 2009 - IPC E21B34/06 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to well equipment and can be implemented at production of fluid or at pumping working agent. The unified well chamber consists of a case in form of cylinder or oval pipe, of lower and upper tips with pipe thread, of an internal mandrel installed in the upper tip and made with a screwed surface for rotation of a cable tool - a projecting deflector. The hollow pocket is made with at least one additional support boring of a bigger diametre located between the lower boring of a smaller diametre of the hollow pocket and a support face of boring of a bigger diametre, also the diametre of the support boring is bigger, than the external diametre of the elastic element of the removable device or instrument; in addition, at installation of a long removable device or instrument into the hollow pocket the elastic element of the device or the instrument is fixed in the lower support face or lower boring of a bigger diametre, while at installation of relatively short removable device or instrument into the hollow pocket the elastic element is fixed higher in the additional support boring of a bigger diametre.

EFFECT: unification of well chamber design facilitating installation of long, as well as short removable devices or instruments into the same hollow pocket of chamber.

6 cl, 6 dwg