PROCEDURE FOR SOLUTIONS CYCLIC PUMPING INTO PAY AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2011 - IPC E21B33/12 

FIELD: gas and oil production.

SUBSTANCE: procedure for solution cyclic pumping into pay consists in installation of drillable packer with pass channel over pay, in pumping solutions into pay and in pressure tight shutdown of pass channel with plug. A nipple with a perforated shank end is lowered into the well on a string for cyclic pay processing. At a lower end the nipple is equipped with an additional plug fixed with a shear element and similar to the installed one. The nipple is lowered till the plug is pressed out from the pass channel and till the nipple pressure tight interacts with the pass channel. Required solutions are pumped into the pay through the string, the nipple and the perforated shank end. Further, the string is lifted till the plug is pressure tight set instead of the preceding plug in the pass channel and to destruction of the shear element. For implementation of the procedure there is used the drillable packer consisting of a hydro-cylinder, of a sealing unit, of an intercepting valve and of the plug with a circular recess for fixation in a head with a stop ring. For solutions cyclic pumping into the pay the plug can be pressed out which is facilitated with an upper face made on the stop ring; the circular recess of the plug is equipped with a face on top for the upper face of the stop ring of the head.

EFFECT: implementation of one packer, drilled required number of times for pumping uncured solutions into pay in any intervals of time.

2 cl, 5 dwg