Combined oil sampler

The utility model discloses a combined type petroleum sampler. The device comprises a sampling barrel and a sampling assembly, the sampling assembly comprises a rotating rod, a screw rod and a fixed cylinder; a plurality of fixing rods are fixed to the bottom of the fixing cylinder in the circumferential direction. The end of the fixing rod is of a conical structure. A cover plate is arranged at the upper top of the fixed cylinder, and a plurality of limiting holes are formed in the upper top of the fixed cylinder in the circumferential direction; a plurality of limiting rods are arranged at the bottom of the cover plate in the circumferential direction; the limiting rod is inserted into the limiting hole; a threaded hole is formed in the top of the cover plate, the screw rod is inserted into the threaded hole and is fixedly meshed with the threaded hole through threads, the top of the screw rod is vertically and fixedly connected with a rotating rod, the bottom of the screw rod is fixedly connected with a sa