METHOD AND DEVICE FOR CONTROLLED PUMPING DOWN TO FORMATIONS Russian patent published in 2013 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: to the well with tubing string a package is run in that includes bottom packer, disconnector, pumping down distributor, top packer, disconnector. The lower part of package is equipped with a socket or liner and the top part with extension cord. Cross-over shoe is installed over the bottom and top packers. Packers are set and pressurised. Down-the-hole flowmeter with plug is run in to the distance bigger than location for mounting seat of the plug. Fluid is delivered to the tubing string, total fluid consumption is determined. The plug is set to the mounting seat, fluid is supplied to tubing string, consumption is determined for fluid pumped down to the lower bed. This value of consumption is subtracted from total consumption value for fluid pumped to upper bed. Actual values of fluid consumption for beds are compared with preset values. In case of difference in values recoverable part of pumping down distributor is run out to the surface. Bottom and top unions are set to mounting seats. The recoverable part of pumping down distributor is run in until it seats in the main cover of pumping down distributor. Controlled pumping down is carried into beds. In order to shutoff one of formations a blind plug is installed instead of a union. When operations are completed the package is run out. Pumping down distributor includes a main cover consisting of a nipple with several through channels, body and bushing of cross-over shoe, recoverable part consisting of the bottom and top bushings and diffuser. Top bushing and diffuser have mounting seats for top and bottom unions and blind plugs. Top bushing has a mounting seat for the plug. In bottom bushing there are upper and lower central channels, divergent and convergent channels.

EFFECT: possibility to perform controlled pumping down to formations by means of one device, to measure consumption of fluid.

9 cl, 3 dwg