Published February 2011
About a question of the descent of the operational column in wells which have a side barrel
Y. I. SafarovIt is known that during the descent of the protective and operation column into the Side Barrel arisen hydromechanical pressure is usually more than hydraulic break pressure and it is observed by absorption of a boring solution. At this time for regulation of hydromechanical pressure in the chink geological parameters of boring solution must decrease. In some cases it is necessary to drill such a hole in the opposite valve that hydromechanical pressure arisen during the descent of the column doesnt exceed gradient of hydraulic break. In old deposits depending on exhaustion of a layer hydraulic break gradient isnt known. Besides during the descent of columns into SB reduction of ring interval causes increase of speed in the ring space and at the result slimes increase too. During the washing operation these slimes stick and as the result protective column plugs. For the purpose of prevention of plugging the diameter of the opening hole must be defined.
