DOWNHOLE SEISMIC SOURCE Russian patent published in 2018 - IPC E21B43/25 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: downhole seismic source comprises a power element in the form of a variable diameter hydraulic cylinder provided with a plunger that interacts with a mechanism of its reciprocal movement along the hydraulic cylinder axis, and a system for supply and control of seismic source. The seismic source is provided with a double-acting electromagnetic hammer mounted coaxially with the power element, in which non-detachable cylindrical housing there are coils of return and forward strokes of the striker, poles and inductive sensors rigidly mounted on the diamagnetic guide, and the striker. The lower end of the striker interacts with the plunger of the hydraulic cylinder. The cavities of electromagnetic hammer are evacuated from the side of the lower and upper ends of the striker, and the longitudinal grooves are made on the outer surfaces of the electromagnetic hammer body and the hydraulic cylinder designed for receiving power supply lines of seismic source electromagnetic hammer coils the and its control system. The communication lines are connected through collector mounted in the upper cover of the electromagnetic hammer and communicated by the cable to the seismic source power supply and control unit.

EFFECT: increased efficiency of vibration seismic action directly on oil formation.

3 cl, 3 dwg