Novel variable-diameter gate rubber core

Abstract

The invention provides a novel variable-diameter gate rubber core. The novel variable-diameter gate rubber core comprises a rubber core body, mounting blocks, a limiting mechanism and a rubber overflow mechanism, wherein an arc-shaped mounting groove is formed in the inner wall of the rubber core body, sealing layer rubber is arranged in the mounting groove, and when the sealing layer rubber is arranged in the mounting groove, filling gaps are reserved between the outer walls of the two ends of the sealing layer rubber and the rubber core body; the mounting blocks are symmetrically arranged on the outer walls of the two ends of the rubber core body, driving grooves are formed in the inner walls of the mounting blocks, detachable driving rubber is arranged in the driving grooves, and one end of the driving rubber is matched with the filling gaps; the limiting mechanism is embedded in the rubber core body, and the limiting mechanism surrounds the end surface, the top surface and the bottom surface of the driving rubber; and the rubber overflow mechanism is arranged in the mounting blocks. According to the novel variable-diameter gate rubber core, the driving rubber and the sealing layer rubber can be independently replaced according to the damage condition, the whole gate rubber core does not need to be replaced, so that the maintenance cost is reduced; and the driving rubber can extrude the two ends of the sealing layer rubber, so that the sealing effect of the two sealing layer rubber is improved, and sealing of drill rods with different diameters is realized.

Description

technical field [0001] The invention relates to the technical field of sealing of rubber parts, in particular to a novel variable-diameter gate rubber core. Background technique [0002] As an important well control device, the blowout preventer plays an important role in the drilling process, especially in the underbalanced drilling process. The working principle of the blowout preventer is to close the wellbore under pressure and maintain continuous control over the well. Circulate formation fluids entering the well. Existing blowout preventers mainly include ram blowout preventer and annular blowout preventer. The ram blowout preventer is mainly composed of shell, side door, oil cylinder, cylinder head, piston, piston rod, locking shaft, seal, The working process is to use the hydraulic pressure to push the piston to drive the ram to close or open, so as to close or open the wellhead, so as to achieve the purpose of sealing and opening the well. [0003] Most of the exi...

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Problems solved by technology

[0003] Most of the existing ram rubber cores are fixed-caliber structures, and it is necessary to replace different types of ram rubber cores in different drilling environments, which is complicated to operate. At the same time, due to the integrated structure of the ram rubber core, the When the contact surface of the rod is worn out, the entire ram rubber core needs to be replaced, which leads to high drilling costs and needs to be improved

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