A rotary rubber core and a mold for injection molding thereof

Abstract

A rotating rubber core and a mold for injection molding thereof, comprising a rubber core, the outer side of the rubber core is provided with reinforcing members in a circular array; the rubber core comprises an upper cylinder, the lower end of the upper cylinder is provided with a lower cone, and the lower end of the lower cone is provided with a lower cone. The diameter of the upper cylinder is smaller than the diameter of the upper end, the upper cylinder is concentrically formed with an upper hole, the upper end of the lower cone is concentrically formed with a conical hole, the conical hole is connected to the upper hole, the diameter of the upper end of the conical hole is larger than the diameter of the lower end, and the lower The lower end of the cone is concentrically formed with a lower hole, and the lower hole is communicated with the conical hole. The present invention effectively reduces the direct contact area between the rotating rubber core and the oil-based mud by heating the reinforcing member outside the rotating rubber core, and further The oil resistance of the rotating rubber core is improved from the structure, and the elasticity of the sealing end of the rotating rubber core is improved by the arrangement of the reinforcement member, thereby improving the service life of the rotating rubber core. The effect of sealed ends and supported ends.

Description

technical field [0001] The invention relates to the relevant technical field of wellbore or well sealing matching equipment, in particular to a rotary rubber core and a mold for injection molding thereof. Background technique [0002] In the existing oil or natural gas drilling process, in order to prevent well kick and blowout phenomenon, blowout preventer is often used to seal the wellbore or well, and the main seal in the blowout preventer is rubber rubber core, and the The rotary rubber core is a self-sealing rubber core. [0003] In the actual use process, it is found that the upper and lower drilling tools mainly cause greater wear to the lower part of the rotary rubber core, that is to say, it often causes wear on the sealing end. At the same time, after long-term use, the sealing end of the existing rotary rubber core often has elastic deformation. The weakened characteristics further reduce the sealing effect, and at the same time, the contact area between the exis...

AI Technical Summary

Problems solved by technology

[0003] In the actual use process, it is found that the upper and lower drilling tools mainly cause greater wear to the lower part of the rotary rubber core, that is to say, it often causes wear on the sealing end. At the same time, after long-term use, the sealing end of the existing rotary rubber core often has elastic deformation. Weakened characteristics, which in turn reduces the sealing effect. At the same time, the contact area between the existing rotary rubber core and oil-based mud is relatively large, so it poses a greater challenge to the oil resistance of the rotary rubber core.

Images