MULTI-RESERVOIR WELL SUMULTANIOUS-SEPARATE PRODUCTION METHOD Russian patent published in 2010 - IPC E21B43/14 

FIELD: oil-and-gas industry.

SUBSTANCE: method includes descending into multi-reservoir well on a tubing string with or without plugged bottom, parkers of at least mechanical, impulse, support, hydraulic, hydro mechanical and electrical actions with or without a tubing string separator. At that the parker consists from at least a case, a string and a set of sleeves. A tubing string separator consists of at least a case and a string, separated form each other with sealing elements, and share screws. According to one of the versions, between reservoirs two bottomhole zones locate two parkers at any of combinations and descend a bypass element executed as a borehole chamber or pipe, or a valve, with recirculated channels between them. After simultaneous or separate parker installation check their tightness, supplying a liquid between parkers through the bypass element, using overburden pressure creation in the tubing string. Then stop the liquid supply, if the overburden pressure drops down, consider the parkers installation as non-tight and take them up from the well. In case when the overburden pressure is stable, assume the parker installation as a tight enough and start up the well. According to the second version install the parker with two set of sleeves, between each execute a recirculated channels on the string, and dislocate a support liner with a bypass channel. Supply a liquid for tightness check between the two sets of sleeves. According to the third version install the tube string separator, at least over one of the parkers, located between two bottomhole zones of the reservoir. At that its string has at least one or two cavities for share screws, accordingly, create two rows of holes with share screws on the case. To disconnect case from the string, cut off two rows of share screws sequentially at tubing string overburden stress increase and in case one parker or few parkers failure.

EFFECT: multi-parker assembly installation efficiency increase and multi-reservoir production of a one injection, piezometric or production well, using it.

17 cl, 7 dwg