Oil sleeve joint and oil sleeve assembly

The utility model provides an oil sleeve joint and an oil sleeve assembly. The oil casing joint comprises an external thread joint; the internal thread joint is in threaded connection with the external thread joint; a thread structure, a first groove, a sealing structure, a second groove and a shoulder structure are sequentially arranged between the external thread connector and the internal thread connector in the direction parallel to the axis of the oil sleeve connector. The thread structure comprises an external thread section arranged on a part of the outer wall face of the external thread connector and an internal thread section in threaded fit with the external thread section, and the internal thread section is arranged on a part of the inner wall face of the internal thread connector. Wherein the thread taper of the external thread section and the thread taper of the internal thread section are both larger than or equal to 1: 10 and smaller than or equal to 1: 6, the thread pitch is both larger than o