METHOD OF SIMULTANEOUS SEPARATE OPERATION OF TWO WELL BEDS WITH DIFFERENTIAL PUMP WITH DRIVE ON TOP Russian patent published in 2009 - IPC F04B47/02 

FIELD: oil industry.

SUBSTANCE: invention refers to oil industry and namely to methods of simultaneous separate operation of two beds of one and the same well. The method involves lowering and installation of a packer in the well between beds, production tubing, upper and lower pumps connected in series and arranged in the production tubing and connected with rods to a common top's drive. Pump inlets are connected to the spaces above the packer and below the packer correspondingly. The upper pump outlet is connected to the flow column, and the lower pump outlet - to the upper pump inlet. Then the drive is brought into operation and adjusted so that proportional pump capacity of the translational movement speed of rods with plungers can be changed. Pumps being installed are screw-type; production tubing before being lowered is equipped with couplings with calibrated central channels arranged below the pump shells fixed on the production tubing. Upper coupling is arranged within the channel connected to the space above the packer. Pump screws are equipped with upper and lower plungers, the upper one of which is through-type for longitudinal liquid flow. Diametres of plungers and screws are decreased downwards in order to pass through the shells and couplings which are not appropriate to them when being lowered. The stock is geared with the top's drive as well. Translational movement is performed in pulse mode; upwards from medium operating position for lower piston to interact with lower seat and for lower screw to come out of the shell upwards thus cutting off the space below the packer and performing the production only from upper bed, and downwards - for upper piston to interact with upper seat thus cutting off communication channels and the space above the packer and for upper screw to come out of the shell downwards and performing the production from lower bed.

EFFECT: method allows separate investigation of properties of beds and their production by consequent cutting off beds and the pumps corresponding to them, allows working with well production containing a great number of mechanical particles because only screw pumps are used for lifting the well production, as well as continuing production without replacing a differential pump and at changing the bed productivity ratio in the course of time.

2 dwg, 2 cl