2results about How to "Improves seal integrity" patented technology

The application relates to a gas seal threaded joint structure suitable for SAGD thermal recovery well pipe string connection, which comprises a male end A and a female end B, the female end B comprises female threads E with a taper, a tool withdrawal groove, a female sealing surface G and a female shoulder J, the male end A comprises male threads C with a taper, a male sealing surface F and a male shoulder H; the female sealing surface G comprises a taper surface and a cylindrical surface, the taper surface is connected with the tool withdrawal groove, and the cylindrical surface is connected with the female shoulder J; the male sealing surface F comprises an arc surface, one end of the arc surface is directly or through a cylindrical surface connected with the male threads C, the cylindrical surface is tangent to the arc surface, and the other end of the arc surface is directly connected with the male shoulder; when the male end and the female end are screwed in place, the male threads C and the female threads E are engaged with each other, the female sealing surface G and the male sealing surface F are in interference contact through the taper surface and the arc surface to realize sealing, and the male shoulder and the female shoulder are mutually abutted. Under the complex working conditions of high-temperature circulation and internal pressure circulation of the pipe string, excellent sealing integrity and structural integrity are provided for the connection of the pipe string.

The utility model provides a power box with a compensation type sealing structure, which belongs to the technical field of power boxes and comprises a box body and a box door, the box body is connected with the box door through a hinge, a groove is arranged at the edge of the inner side of a door frame of the box body, and the box door is connected with the groove. A groove is formed in the box door, a compensation assembly is arranged at the joint of the box body and the box door, the compensation assembly comprises a sealing ring, a corrugated pipe and an expansion joint, the sealing ring is matched with the groove, the sealing ring and the box door form linear sealing, and the corrugated pipe and the expansion joint are arranged in the length direction of the joint of the box body and the box door. The two ends of the box cover are respectively fixed on the box body and the box door; a guide structure is arranged at the joint of the box body and the box door, the guide structure is used for guiding the compensation assembly to make contact with the joint face of the box door and the joint face, the corrugated pipe and the telescopic joint are arranged in series, and the defect that a traditional power box body structure lacks flexibility is overcome.