IMPLOSIVE DOWNHOLE SEISMIC SOURCE Russian patent published in 2012 - IPC G01V1/44 G01V1/133 

FIELD: physics.

SUBSTANCE: apparatus has a hollow housing in whose top part there is an axial hole for passage of the shaft of the winding drive of the piston for cleaning the implosive chamber. The chamber is rigidly mounted in the outer open pocket of the housing. The cleaning piston is sealed in a casing and is freely sat and sealed on a rod and is restricted in axial displacement by two stop screws. Inside the top cavity of the housing, the top end of the drive shaft is rigidly attached to the output shaft of a propeller hydraulic motor which is rigidly mounted to the housing. The working fluid is fed to the motor through a start valve which is controlled by a drive and recording compartment. A self-contained seismic station with an inner clock and a control unit is installed in the compartment. There is also an offset axial hole in the housing for passage of the working fluid.

EFFECT: achieving multiple repetition of a seismic pulse when building slanted and horizontal wells without additional work on raising the column and without stopping drilling.

1 cl, 1 dwg