EQUIPMENT FOR MULTIPLE PRODUCTION OF MULTILAYER FIELD WELLS Russian patent published in 2009 - IPC E21B43/14 

FIELD: oil-and-gas production.

SUBSTANCE: invention related to hydrocarbons production methods and can be used for research and for multiple or gradual production of several reservoir of the one well. Equipment includes descended into well production string multiparker assembly on a tubing string. This assembly consists of parkers, with or without pipe string disconnector, for bottom hole zone disconnecting, well chambers, descended upper, lower and/or reservoir depth, for installation in their pocket rope retrievable valves, controllers, fittings, plugs and subsurface devices, plug and/or at least one nipple. The well equipped with combined production string, with relative external diametre over reservoir depth not less than 140 mm, at reservoir depth 114 or 127 mm. At least top parker and well chambers made with internal bypass diametre not less than 45mm for passing through rope and demountable geophysical instruments, devices, measuring transducers with transmittals or devices with dimentional diametres up to 44 mm. Top parker has external diametre not less 112 mm and installed over top reservoir of correspondent production string with diametre not less than 140 mm. Another parker or other parkers have external diametres not less than 84 and not greater than 108 mm and installed either only between reservoirs or under the lowest reservoir of the correspondent production string with relative diametre 114 mm or 127 mm. Well chambers are made with dimentional diametre not more 122 mm for the correspondent production string over reservoir, and not more than 108 mm for the production string with correspondent diametre at reservoir.

EFFECT: efficiency increase of multiple or gradual production of several reservoir of the one well.

20 cl, 9 dwg