A new type of variable diameter ram rubber core

Abstract

A new variable-diameter gate rubber core, including a rubber core. The inner wall of the rubber core is provided with an arc-shaped installation groove, and a sealing layer glue is arranged in the installation groove. When the sealing layer glue is installed in the installation groove, the two ends of the sealing layer glue There is a filling gap between the outer wall and the rubber core; the mounting block is symmetrically arranged on the outer wall at both ends of the rubber core, and the inner wall of the mounting block is provided with a driving groove, and a detachable driving rubber is provided in the driving groove, and one end of the driving rubber is matched with the filling gap; The limit mechanism is embedded in the rubber core, and the limit mechanism surrounds the end surface, top surface and bottom surface of the driving rubber; the overflow mechanism is arranged in the installation block. The driving glue and the sealing layer glue of the present invention can be replaced separately according to the damage situation, without the need to replace the entire gate rubber core, which reduces maintenance costs, and the driving glue can squeeze both ends of the sealing layer glue to improve the sealing effect of the two sealing layer glues , to achieve the sealing of different diameter drill pipes.

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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