KIT OF EQUIPMENT FOR DRAINAGE OF WELLS

The complex of equipment is intended for clearing a face zone of a layer with the purpose of meliorating fluid influx in a well worsened after durable exploitation or as a result of drilling in by boring on off-standard drill fluid, and also with the purpose of recovery of injectivity of injection wells littered with mechanical impuritiess of flood water.

Into structure of kit enter the drainage pump, wall packer, filter, box with the choke, mouth gland with a preventer, lubricator with the cargo, drain hose and erection yoke.

The installation site of the drainage pump in a hanger tubing is defined depending on the chosen depression on a layer.

The repeated movements of top of tubing hill up - downwards result in pumpdown of layer fluid on a surface. Thus in each course hill up layer "dumped" from pressure of a fluid column which is taking place above the cylinder piston. The fluid column in room behind a tube is parted from a layer by a wall packer. The maximum speed of inflow of layer fluid to a well and best conditions for clearing a face zone of a layer at this time takes place. The fluid, arriving from a layer , during a course hill up drives through the bottom openings in a liner, absterging a sump of a well. If on a bottom hole from fluid comes out the gas, he through orifices taking place under a wall packer arrives to drainage pump reception place. Protection against pump capacity breakaway because of gas is provided with that at the end of a movements of the downwards cylinder a delivery valve open out under duress and in the pump there is a displacing of gas cut fluid on degassed. It provides suction of layer fluid and gas in a following cycle of operation of the pump. Heaved fluid and gas along flow column through a flexible pipe are removed from a well.

BOTTOM-HOLE LAYER SEPARATOR.

Bottom-hole the separator of a layer is intended for separation of a layer and well bore on time of production of any operations in a well requiring depressurization of its mouth (for example: substitution of the well pump, tubing descent and ascent, substitution of mouth armature and other).

The separator contains the body with the central feed-through channel by a diameter of 58 mm (constantly opened for dipping under a wall packer of tubes, instruments, appliances and other equipment), wall packer, valve and orifices for washover of a well and pumping of reactants in a layer. The main effect from applying a separator is reached at the expense of canceling negative consequences caused by infiltration into a face zone of a layer during underground well repair of pressure fluid and her mechanical admixtures. As demonstrates the practice, the period of drop of productivity, after underground repair with mud lubrication, can be significant and durable In the cases row the productivity is not restored completely for period between-repairs of a well and there is an increasing decline of production of oil.

The swab for a casing allows to create repeated, short-term, regulable on magnitude (including, deep up to 0,8Р layer ) depression on a productive layer. It provides clearing a face zone of a layer from contaminating fragments and meliorating of fluid influx to a bottom hole. The integrated applying of a swab with bottom-hole by a separator of a layer, allows after clearing a face zone to effect change of downhole equipment and all subsequent well repairs without mud lubrication of a layer, i.e. without his repetitive impurity.

The swab omit in well on the depth, applicable to chosen depression on a layer . Displacing a swab "hill up - downwards" periodically unload and load a layer by pressure of a fluid column which is taking place above a swab. By a difference in descent and ascent speed of a swab adjust a mode of flow of fluid in a face zone, and quality of its clearing. In case of use of a swab with a separator of a layer , his movement "hill up - downwards" calls only periodic discharging of a layer from pressure of a fluid column. By operation of a swab near to seam roof the below zero pulse of pressure can reach significant magnitude. Thus, the greatest possible effect from drainage of a well can be achieved at the expense of a complementary wave action on a layer.