METHOD FOR REMOVAL OF ASPHALT-RESIN-PARAFFIN DEPOSITS FROM A PETROLEUM WELLS Russian patent published in 2019 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: invention is intended for use in the oil industry and can be used in the operation of wells, in lift pipes where various deposits are formed, for example, asphalt-resin-paraffin deposits (ARPD). When implementing the method, a solvent is pumped into a column of lift pipes of a well, and a certain time is expected to dissolve the deposits, periodically stirring the solvent. In a column of elevator pipes, trips and lowering operations of a small-sized deep gauge on a geophysical cable with feedback are organized in two stages. At the first stage, the pressure gauge is lowered several times to the submersible pump and lifted to the wellhead so that the sediment zones by the pressure gradient increase are determined by the dependence of the static pressure in the tubing string of the lift tubes from the vertical depth of the pressure gauge. At the second stage, tripping operations are carried out in these zones in order to mix the solvent with the ARPD particles.

EFFECT: increases the efficiency of sediment removal due to the rational use of organic solvent and reducing the time of sediment removal.

1 cl, 2 dwg