DEVICE FOR MAGNETO-HYDROIMPULSIVE WELL TREATMENT (VARIANTS) Russian patent published in 2007 - IPC E21B28/00 E21B43/25 E21B37/00 

FIELD: oil production, particularly vibration generating arrangements for boreholes or wells, for instance, for stimulating production.

SUBSTANCE: device made in accordance with the first variant comprises guiding tube and body with means, which create and transform pulsed liquid pressure. Above components are made as coaxial multi-turn impulse magnetic field inductor cooperating with movable highly-conductive plate and plate of highly-strong material serially arranged towards working cavity. Device also has locking unit. Both plates are spaced from guiding pipe and device body. Radial channels are made in the body to communicate cavity over plates with interior of tube to be treated. Coaxial power supply cable, which supplies power to inductor, is arranged inside guiding tube. Working cavity of the body is defined by guiding tube, body and tube to be treated. Spaces have variable cross-sections tapering towards body ends. Device made in accordance with the second variant comprises working cavity defined by guiding tube, tube to be treated, lower surface of locking member, body, locking member side and tube to be treated. Spaces are created between the body and tube to be treated. The spaces have variable cross-sections tapering towards body ends. Working cavity volume is proportional to given treatment zone value.

EFFECT: increased efficiency of well bottom zone treatment and decreased influence of asphalt-tar-paraffin deposits, possibility to extend range of tubes to be treated and treatment zone regulation.

2 cl, 2 dwg