BOREHOLE SEISMIC VIBRATOR Russian patent published in 2023 - IPC G01V1/135 G01V1/40 

FIELD: vibroseismic technique.

SUBSTANCE: invention can be used to enhance oil recovery of oil fields by borehole vibration impact on oil reservoirs, as well as for seismic exploration of the earth's interior. The downhole seismic source includes power elements mounted on the ends of the one-piece chassis of the double-acting electromagnetic hammer with forward and reverse stroke coils of the striker in a diamagnetic guide, induction position sensors of the striker interacting at its ends with the plungers of the power elements. At the same time, the elastic chambers of the power elements, at the outer surface, are in contact with orthogonally movable wedge spacers and puncheons interacting with return springs. At the same time, terminals are mounted on the outer side of the puncheons along the axial line passing through the technological holes in the chassis of the power elements with the possibility of radial movement. The downhole seismic source also includes a transducer with an oil-filled cavity communicating with elastic chambers of power elements. Longitudinal grooves are made on the outer surfaces of the chassis of the electromagnetic hammer and the power elements, designed to accommodate the wires of power supply communications of the coils of the electromagnetic hammer and its control system. At the same time, the power elements are configured with at least three puncheons and three wedge spacers mounted equidistant from each other, with the possibility of their uniform radial displacement. At the same time, the longitudinal edges of the inner surface of the puncheons, in contact with the elastic chamber, are rounded with a radius equal to 0.1–0.3 of the outer diameter of the elastic chamber, and the end surface of the wedge spacer, in contact with the elastic chamber, is made convex, straight, or concave.

EFFECT: prevention of diametrical deformation of the casing pipe, as well as expansion of the sector of impact of vibration signals into oil-bearing formations in order to increase the flow rate of the well.

2 cl, 3 dwg