Three-in-one blowout preventer with double cylinder, double plunger, feather key type shaft plug core

Abstract

The invention provides a three-in-one blowout preventer with double-rotary cylinders and double-plunger sliding keys, which is applied to well repairing and blowout prevention operations in oil and gas production. The upper plug core round slideway and the lower plug core round slideway of the shell assembly are matched with the polishing rod blowout prevention mechanism and the lower sucker rod blowout prevention mechanism respectively. It implements screw transmission with the double-cylindrical rotating pair and converts the rotary motion of the rotary cylinder into the axial movement of the transmission shaft. Both the upper shaft plug assembly and the lower shaft plug assembly adopt a cylindrical piston type and a three-in-one shaft plug core Constructed and used as the sealing assembly and transmission assembly of the blowout preventer, two sets of upper shaft plug assembly and lower shaft plug assembly are precisely slid according to the double-plane moving pair and the double-piston moving pair and are limited by the sliding key The device completes the axial and circumferential limit, and then clamps the polished rod and the sucker rod in the hole of the diameter rod respectively, thereby realizing the non-metallic seal and wellhead blowout prevention of the closed sealing rubber core and the 30-shaped sealing ring Operation.

Description

technical field [0001] The invention relates to a blowout preventer for conventional oil and gas and unconventional oil and gas production and workover operations, in particular to a three-in-one blowout preventer with double rotary cylinders, double plungers and double sliding keys. Background technique [0002] The technical performance and field adaptability of the wellhead blowout preventer are the key to the well control management in the workover operations of conventional and unconventional oil and gas production. Among the wellhead safety blowout preventers commonly used in domestic and foreign oilfield workover The functions of sealed and semi-full sealed blowout preventers are realized separately. [0003] The typical wellhead safety blowout prevention devices of foreign companies include Cameron’s blowout preventer adopting radial combined seal, Hydril’s blowout preventer adopting piston-type self-tightening seal, and Shaffer’s blowout preventer adopting end face ...

AI Technical Summary

Problems solved by technology

[0009] In order to effectively solve the wellhead out-of-control problem during the workover operation of conventional oil and gas and unconventional oil and gas production, and overcome the defects and deficiencies of the existing wellhead blowout prevention technology and its blowout preventer, the purpose of the present invention is to provide a suitable oil and gas production workover Three-in-one blowout preventer with double-rotor and double-plunger feather key type shaft-plug-core for well operation

Images