Wave compensation sleeve device for offshore geotechnical engineering investigation and drilling operation

The utility model discloses a wave compensation sleeve device for offshore geotechnical engineering investigation and drilling operation. The utility model belongs to the technical field of water exploration equipment. Key points of the technical scheme are as follows, including a cannula, the sleeve comprises an inner sleeve and an outer sleeve sleeved outside the inner sleeve; a gap is formed between the inner sleeve and the outer sleeve; the inner sleeve is in sliding fit with the outer sleeve; the inner sleeve is longer than the outer sleeve; a supporting disc is arranged in the circumferential direction of the end, close to the outer sleeve, of the inner sleeve. A pressing cap is circumferentially fixed to the end, away from the supporting disc, of the outer sleeve, one end of the pressing cap is embedded into the gap, a reducing coupling is arranged at the end, away from the pressing cap, of the outer sleeve and comprises a large-diameter end and a small-diameter end, the large-diameter end is connected